JP2007240786A - Hologram sheet and printing medium - Google Patents

Abstract

The present invention relates to a highly valuable medium such as banknotes, passports, brand protection and the like that is required to prevent counterfeiting and copy protection.
On the surface of a diffraction grating formed on one surface of a hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region. A latent image pixel of a first area made of a transmissive member; and a first light reflection region made of a light reflective member formed on a background of the latent image image pixel; Has a second area latent image background pixel made of a light transmissive member, and a second light reflection region made of a light reflective member formed on the background of the latent image background pixel, and the latent image The hologram sheet is characterized in that the areas of the image pixel and the latent image background pixel are different.
[Selection] Figure 4

Description

  The present invention relates to a hologram sheet and a print medium in which the hologram sheet is attached to a substrate such as paper. In particular, the present invention is used for a highly valuable medium such as banknotes, passports, and brand protection, and can be applied to a medium that requires anti-counterfeiting or authenticity determination.

  As a method for enhancing a security function for preventing forgery by attaching a hologram on the surface of a card medium such as a magnetic card or a paper medium such as a banknote or various securities, it is known. However, with the rapid improvement in accuracy of electronic devices such as copiers and personal computers, simple holograms have not been able to obtain sufficient functions for preventing counterfeiting. Accordingly, it has been disclosed as in the following prior inventions to form a transparent layer or a transparent portion by providing a non-metal region in a metal layer or a metal vapor deposition layer constituting a hologram.

  For example, by washing away the hologram masking print layer, a metal reflective layer with a desired pattern (diamond, heart, clover, spade, etc.) is provided, and the degree of freedom in design is increased, and fine patterns and complex patterns are formed. A technique is disclosed (for example, see Patent Document 1).

As a method for removing the metal vapor deposition layer of the hologram, for example, a technique is disclosed in which the metal vapor deposition layer is melted in a non-contact manner by irradiation with a laser beam such as YAG or CO ₂ to form a print pattern as fixed information ( For example, see Patent Document 2).

  Further, a technique is disclosed in which a metal vapor deposition type thermal transfer hologram sheet is partially irradiated with a laser to evaporate a metal vapor deposition layer at the irradiated portion into a slit shape or a mesh shape (for example, see Patent Document 3).

  Furthermore, a technique is disclosed in which a print design forming unit and a watermark design forming unit are formed on a hologram by laser processing or etching processing of a metal vapor deposition film of the hologram (see, for example, Patent Document 4).

  Further, a technique of a safe storage document is disclosed in which holes are formed in the base material and the pattern formed by the naked eye is not visible in the reflection state but the pattern is visible in the transmission state (see, for example, Patent Document 5).

JP 11-286194 A JP-A-10-333574 JP 2003-150027 A JP 2005-14492 A Special Table 2000-501036

  By the way, according to Japanese Patent Application Laid-Open No. 11-286194, which is a prior invention, a non-metal region is provided in a metal vapor deposition layer of a hologram to form a desired pattern (diamond heart clover spade is disclosed). In creating a design, there is an advantage that an arbitrary pattern can be freely formed. However, from the viewpoint of security regarding forgery prevention, the desired pattern to be formed in the non-metal region in the metal vapor deposition layer by the hologram is a simple pattern, and the entire pattern pattern is formed with or without the metal vapor deposition layer. Therefore, there is a problem in terms of security because it is easy to imitate when copying and copying. Therefore, it has been desired to increase the forgery resistance by making the non-metal region in the metal vapor deposition layer more effective.

Japanese Patent Laid-Open No. 10-333574 of the prior invention forms a print pattern as fixed information by melting a metal vapor deposition layer of a hologram in a non-contact manner by irradiation with a laser beam such as YAG or CO ₂ . As specific print patterns, management numbers, characters, and the like are disclosed, and the object and use of the present invention are achieved by recording fixed information having a size that is visible. However, when fixed information is made into a fine structure (for example, a fine line or dot aggregate), since the lines and dots are very small, variations in the output of the laser beam occur and the laser output decreases. In this case, it is not formed as a line or a point, and conversely, when the laser output is increased, it may be larger than the line or point of the set width, so that it is not suitable to form a fine body. Therefore, when fixed information is processed with a laser beam, characters and the like that are not easily affected by variations in the output of the laser beam are suitable, and there is a problem when the fixed information has a fine structure.

  Japanese Patent Application Laid-Open No. 2003-150027 discloses that the metal vapor deposition layer of the hologram sheet is partially irradiated with a laser to evaporate the metal vapor deposition layer at the irradiated portion into a slit shape or a mesh shape, but the hologram formation layer remains. In this way, a pseudo transparent or translucent hologram sheet is formed. Although the present invention is suitable for low-volume production of various types in terms of cost, the mass-produced product is affected by variations in the output of the laser beam. (Accuracy to be removed) also causes variation, and is not suitable when the same machining accuracy and machining quality are always required. On the other hand, an apparatus having a laser beam capable of precise processing requires a function and space for controlling heating by a laser, and the apparatus itself becomes large and the price of the apparatus becomes high, which cannot be realized at low cost.

  Further, the metal vapor deposition layer of the hologram is evaporated by laser processing, and when viewed through the slit shape or mesh shape, it looks as if it is transparent (or translucent), thereby functioning as a pseudo-transparent hologram. The purpose of making the slit shape and the mesh shape is to form a transparent (or translucent) hologram when viewed with the naked eye by repeatedly forming a removed portion and a non-removed portion on the metal deposition layer by laser processing. It gives the light and shade of. However, in terms of security regarding forgery prevention, when determining the authenticity of the hologram, the density of “transparent (or translucent)” or “not transparent (or translucent)” is used as a reference. Since standards differ depending on individual differences and objective judgment cannot be made, there is a problem that it is not suitable as a true / false discrimination means, and a true / false discrimination means that anyone can objectively judge has been desired.

  On the other hand, as information that can be seen through the metal deposition layer of the hologram by laser processing, characters and numbers are specifically disclosed. Although it is visible, there is a drawback that even if it is not transparent, letters and numbers can be seen in a reflected state, and as a latent image effect on security, a configuration in which the information is not visible when viewed in a more reflective state is desired .

  Further, Japanese Patent Application Laid-Open No. 2005-14492, which is a prior invention, includes a print design forming unit on a hologram and a watermark design forming unit by laser processing or etching processing of a metal vapor deposition film of the hologram. The watermark design forming part is letters and numbers, and there is no specific description on the size of the letters and it can be seen even if it is watermarked, but on the other hand, even if it is not transparent, the letters and numbers can be seen in the reflected state As a latent image effect in terms of security, a configuration in which information cannot be seen in a more reflective state has been desired.

  In addition, Japanese Patent Application Publication No. 2000-501036 of the prior invention states that a hole is formed in a base material by a laser beam and the pattern formed by the naked eye cannot be seen in the reflection state, but the pattern can be seen in the transmission state. The invention is disclosed. However, when it is used repeatedly such as banknotes and is mechanically processed by ATMs or ticket machines, if the base material itself is perforated, the durability of the peripheral portion where the perforations are perforated is lowered, and distribution suitability is reduced. It may be damaged. In mass production, since holes are made in the substrate with a laser beam, there may be cases where a hole having a stable size cannot be obtained due to variations in the output of the laser beam. Further, although the pattern is formed by the holes, since the configuration of the pattern is easily clarified when viewed through, the prior invention has a problem in preventing forgery.

  The present invention provides a hologram sheet having a hologram forming layer, wherein a hologram image region comprising a latent image region and a latent image background region is formed on the surface of a diffraction grating formed on one surface of the hologram forming layer. And the latent image area has a first area of latent image pixels made of a light transmissive member and a first light reflection made of a light reflective member formed on the background of the latent image pixels. The latent image background region includes a second area latent image background pixel made of a light transmissive member and a second light reflecting member formed on the background of the latent image background pixel. The hologram sheet is characterized in that the areas of the latent image pixel and the latent image background pixel are different.

The present invention also provides a hologram sheet having a hologram forming layer, wherein a hologram image comprising a latent image area and a latent image background area is formed on the surface of a diffraction grating formed on one surface of the hologram forming layer. The latent image area has a first area and a first orientation made of a light transmissive member, and light reflectivity formed on the background of the latent image pixels. A first light reflection area made of a member, and the latent image background area includes a second area and a second orientation made of a light transmissive member, and the latent image background pixel. A second light reflection region made of a light reflective member formed on the background of the first image, the area of the latent image image pixel and the latent image background pixel are the same, and the latent image image pixel The first direction is different from the second direction of the latent image background pixel. Is a hologram sheet which is characterized in Rukoto.
It is.

  The present invention also provides a hologram sheet having a hologram forming layer, wherein a hologram image comprising a latent image area and a latent image background area is formed on the surface of a diffraction grating formed on one surface of the hologram forming layer. The latent image area has a first area of latent image pixels formed of a light transmissive member and a light reflective member formed on the background of the latent image pixels. The latent image background region includes a second area latent image background pixel made of a light transmissive member and a light reflective member formed on the background of the latent image background pixel. The latent image pixel and the latent image background pixel have the same area, and the pixel density per unit is the latent image image region and the latent image background region. The hologram sheet is characterized by being different.

  The present invention also provides a hologram sheet having a hologram forming layer, wherein a hologram image comprising a latent image area and a latent image background area is formed on the surface of a diffraction grating formed on one surface of the hologram forming layer. The latent image area includes a latent image image pixel made of a light transmissive member and a first light reflection area made of a light reflective member formed on the background of the latent image image pixel. The latent image background area includes a latent image background line made of a light transmissive member and a second light reflection area made of a light reflective member formed on the background of the latent image background line. The density of the latent image image pixels and the latent image background line per unit is the same or different between the latent image image region and the latent image background region.

  The present invention also provides a hologram sheet having a hologram forming layer, wherein a hologram image comprising a latent image area and a latent image background area is formed on the surface of a diffraction grating formed on one surface of the hologram forming layer. The latent image area includes a latent image line made of a light transmissive member and a first light reflection area made of a light reflective member formed on the background of the latent image line. The latent image background area includes a latent image background pixel made of a light transmissive member and a second light reflection area made of a light reflective member formed on the background of the latent image background pixel. The density of the latent image line and the latent image background pixel per unit is the same or different between the latent image area and the latent image background area.

  Further, the present invention provides the hologram sheet, wherein the latent image image pixels and / or the latent image background pixels are formed in a matrix.

  In addition, the present invention is a hologram sheet characterized in that the shape of the latent image image pixel and / or the latent image background pixel is formed of any one of a circle, a polygon, a figure, a mark, or a character.

  Further, the present invention is a hologram sheet characterized in that the shape of the latent image image pixel and the latent image background pixel is formed of any one of an anisotropy ellipse, polygon, figure, mark or character. is there.

  Further, the present invention is the hologram sheet, wherein the latent image pixel and the latent image background pixel are formed of characters and are formed of the same typeface or different typefaces.

  Further, the present invention is the hologram sheet characterized in that in the hologram forming layer, a transparent region made of a light transmissive member is formed around the hologram image region.

  In addition, the present invention is a printing medium in which a hologram forming layer is bonded to a printing substrate via an adhesive layer.

  The present invention is the print medium, wherein the print medium is a bank note.

  The hologram image area of the printing substrate to which the hologram sheet and the hologram forming layer of the present invention are attached with an adhesive is a light reflection area of a latent image image area and a latent image background area made of a light reflective member when viewed in a reflective state. Thus, the hologram effect can be visually observed with the diffracted light and the reflected light, but the latent image image pixel and the latent image background pixel formed with the light transmitting member in the hologram image region cannot be visually observed. On the other hand, when the hologram image area is viewed in a transparent state, the hologram effect is not visible, but a plurality of latent image pixels and a latent image background area in the latent image area formed transparently with a light transmissive member in the hologram image area. The latent image area can be visually recognized as a character, a mark, or a pattern due to a difference in the amount of transmitted light from the plurality of latent image background pixels in FIG. At this time, the latent image pixel and the latent image background pixel are fine as one individual pixel and are difficult to see, but a plurality of latent image pixels and a plurality of latent image background regions in the latent image region are included. Since the latent image background pixels are provided, when the latent image region and the latent image background region are viewed as regions (or areas), more transmitted light can be viewed, and information or patterns formed in the regions (For example, characters, marks, designs, etc.) can be easily recognized. Therefore, it has the merit that two kinds of effects, that is, the hologram effect in the reflection state and the latent image effect in the transmission state can be visually discriminated without using a true / false discrimination tool. The same effect can be obtained even when the hologram forming layer of the hologram sheet of the present invention is attached to a base material such as paper, film or card with an adhesive, which is suitable for banknotes and securities. However, the substrate must be a material or material that transmits light above a certain level.

  Further, the light reflecting member in the hologram image region of the hologram sheet is formed of a highly glossy metal material such as aluminum, and therefore has high resistance to copying and duplication. The reason for this is that devices such as color copiers and scanners irradiate the object to be copied or the object to be copied with strong light to obtain an input image. Due to the high reflectivity, it is difficult to reproduce accurately. In addition, in the present invention, since the latent image image pixel and the latent image background pixel formed of a light transmissive member (for example, a transparent thermoplastic resin) in the hologram image region are fine, each one individual pixel is The latent image pixel and the latent image background pixel are more difficult to copy and duplicate due to light reflected by a light reflecting region (for example, aluminum) that is a light reflecting member and light diffracted by a diffraction grating. Therefore, since the hologram sheet of the present invention has two different types of prevention functions against copying and duplication, double security can be provided.

  Moreover, even if the hologram forming layer of the hologram sheet of the present invention is affixed to a substrate, a latent image effect due to the transmission state can be obtained. For example, a technique is disclosed in which holes are made in a base material such as paper and a latent image can be visually observed in a transmission state. However, in this technique, a hole is made in the base material itself. However, when the hologram forming layer of the hologram sheet of the present invention is directly attached to the base material, the durability of the base material itself does not decrease, and the ATM or ticket machine It does not have an adverse effect on the transport.

  In addition, the printing substrate on which the hologram sheet and the hologram forming layer of the present invention are attached with an adhesive includes a latent image pixel in the latent image region and a latent image background pixel in the latent image background region in the hologram image region. Therefore, the camouflage property is high when visually observed by reflection. The reason is, for example, that the hologram image area is divided into a latent image area and a latent image background area, and one area is formed by a latent image pixel formed by a light transmitting member and a light reflecting area formed by a light reflecting member. However, when the other region is formed only by the light reflecting region made of the light reflecting member, the region having the latent image line and the region not having the latent image line are each made of a light reflecting member such as aluminum. Since a large difference occurs in the area, the light reflectivity and glossiness are different, and the latent image is easy to see. Precisely, the latent image pixels are easy to see. However, in the configuration of the hologram sheet of the present invention, since each region includes a latent image pixel made of a light transmissive member and a light reflective region made of a light reflective member, the area of the light reflective member is made in each region. Since there is no significant difference and there is little difference in light reflectivity and glossiness, the latent image pixels are more latent when the printed substrate with the hologram sheet and hologram forming layer attached with an adhesive is viewed in the reflected state. There is merit that can be made. Note that the same hologram effect and latent image effect as described above can be obtained even if the latent image background region or the latent image background region is formed with lines instead of one of the latent image pixels. The “pixel” as used herein is an element formed by the light transmissive member of the latent image area and the latent image background area. If the area of the pixel is changed, the pixel when viewed in a transmissive state is used. The amount of transmitted light also changes. The “pixel” is the same as the halftone dot in the printing industry.

  Embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and various other modes can be implemented within the scope of the technical idea described in the scope of claims.

(Form of hologram sheet)
FIG. 1 is a schematic view of a hologram sheet 1 of the present invention. The hologram sheet 1 is wound in a roll shape and includes a hologram image area 6, a transparent area 6 e, and a positioning mark 9. The hologram image area 6 includes a first light reflection area 6a and a second light reflection area 6c made of a light reflecting member, and a first latent image pixel 6b and a second latent image background made of a light transmissive member. It consists of a pixel 6d. The light reflection region 6a and the light reflection region 6c have a hologram effect when viewed in the reflection state, and the latent image pixel 6b and the latent image background pixel 6d are visually observed in the reflection state. Although it is not possible (or a latent image is formed), each line can be visually observed (or a building image is formed) when viewed in a transmissive state. Further, since the transparent region 6e is made of a light transmissive member and does not require the hologram effect, the transparent region 6e is preferably transparent or semi-transparent, and has the same hologram as the latent image pixel 6b and the latent image background pixel 6d. It consists of a processed layer 4. On the other hand, the positioning mark 9 is made of a light-reflecting member. When the positioning mark 9 is continuously pasted on a base material 10 such as paper or plastic, the positioning mark 9 in the pasting machine is read by an optical sensor or the like, The adhesive layer 8 laminated on the lowermost part is bonded to the substrate 10 at a certain position by thermocompression bonding. Therefore, when the hologram sheet 1 of the present invention is affixed to the substrate 10, the positioning mark 9 is not affixed to the substrate 10, and the hologram image region 6 and the transparent region 6e around the hologram image region 6 can be affixed. desirable. The hologram sheet 1 shown in FIG. 1 is described in a roll shape because it is continuously stuck by a sticking machine. However, the hologram sheet 1 does not have to have a positioning mark 9 and the hologram image region 6 is arranged in a matrix. A plurality of sheet-like forms may be used, or the hologram sheet may be constituted by a light reflecting member alone without the transparent region 6e. Further, the shape of the positioning mark 9 is not limited, and the shape may be appropriately selected depending on the model of the sticking machine.

  The “hologram effect” described in the present invention means that when the hologram image region 6 of the present invention is viewed in the “reflected state”, the color of the design changes to rainbow colors due to the diffracted light or reflected light of the diffraction grating. The hologram has the effect that the image is switched to another image, either in the state of the hologram sheet 1 or in the state where the hologram forming layer 3 of the hologram sheet 1 is attached to the base material 10 using the adhesive layer 8 or the like. An effect is obtained. The hologram forming layer 3 is formed by forming fine irregularities to be a diffraction grating or a diffraction grating pattern on the hologram processing layer 4, and attaching a highly glossy light reflecting member such as aluminum to the irregular surface by vapor deposition or the like. Can be made. A specific hologram effect refers to an effect such that a plurality of symbols and colors change depending on the viewing angle, such as a hologram attached to a bank note such as Japan or the euro. Further, the hologram effect is not limited to the effect seen in the banknote hologram, but may be the effect of a hologram attached to a known card, gift certificate, or certificate. Further, the “latent image effect” described here means that when the hologram image region 6 of the present invention is viewed in a “reflective state”, information such as characters, designs, marks, etc. cannot be viewed (or becomes a latent image). However, when viewed in the “transparent state” (or when viewed through a watermark), the latent image area can be viewed as information on characters, symbols, marks, and the like.

  2A and 2B are diagrams in which the hologram forming layer 3 of the hologram sheet 1 is attached to the base material 10. FIG. The specific predetermined area is the hologram image area 6 and the surrounding transparent area 6e. Further, it is desirable that the base material 10 is paper, and necessary information such as a fee, a human image, and a background pattern is applied by offset printing, intaglio printing, or screen printing. As shown in FIG. 2A, the hologram image area 6 is divided into a latent image area and a latent image background area. Further, as shown in FIG. 2B, the latent image area is formed in the latent image image area on the background of the first area latent image image pixel 6b made of a light transmissive member and the latent image image pixel 6b. It is composed of a first light reflecting region 6a made of a light reflecting member. On the other hand, in the latent image background region, a second area latent image background pixel 6d made of a light transmissive member and a second light made of a light reflective member formed on the background of the latent image background pixel 6d. The reflection area 6c is configured. The configurations of the latent image area and the latent image background area may be reversed.

(Configuration of hologram forming layer)
FIG. 3A is a configuration diagram of the hologram sheet 1 of the present invention, and the hologram sheet 1 is formed of a hologram sheet substrate 2, a hologram forming layer 3, and an adhesive layer 8. The hologram sheet substrate 2 is composed of a sheet substrate 2a and a release layer 2b, and is transparent or translucent on one surface of the sheet substrate 2a using a coating machine, a gravure coater, a gravure printing machine, a screen printing machine, or the like. The release layer 2b is laminated. The hologram forming layer 3 is formed by the hologram processing layer 4, the diffraction grating 5 (more precisely, the unevenness 5 a in close contact with the light reflecting member and the unevenness 5 b made of the light transmitting member), and the mask layer 7. In the case of pasting, the hologram forming layer 3 is bonded and formed on the base material 10 via the adhesive layer 8. As a method for producing the hologram forming layer 3, a transparent or translucent hologram processing layer 4 as a light transmissive member is laminated on the surface of the release layer 2b, and a fine unevenness or unevenness pattern is formed in order to exhibit the hologram effect. A diffraction grating 5 is formed. The diffraction grating 5 is formed by thermally transferring the unevenness of the diffraction grating 5 formed on one surface of a metal stamper (not shown) to the surface layer of the hologram processing layer 4. Precisely, the unevenness formed on the stamper becomes the diffraction grating 5 because the unevenness is reversed in the hologram processing layer 4. Next, after a light reflective member such as aluminum is vacuum-deposited or sputtered on the surface of the hologram processing layer 4, the mask layer 7 is formed by a gravure printing machine or the like and immersed in an alkaline solution to be protected by the mask layer 7. The aluminum formed on the diffraction grating 5 that has not been dissolved is dissolved and removed to form transparent irregularities 5b made of a light transmitting member. Accordingly, the light transmissive member becomes the hologram processing layer 4. On the other hand, aluminum (thick line portion in the figure) remains only in the region covered with the mask layer 7 to form the unevenness 5a in close contact with the aluminum. Specifically, of the hologram image region 6, the latent image region is composed of a light reflecting region 6a (thick line portion in the figure) in which aluminum remains and a light transmitting region 6b in which aluminum is dissolved. The light transmission region 6b is linearly formed as transparent or translucent, and becomes a latent image pixel 6b. On the other hand, the latent image background region is composed of a light reflecting region 6c (thick line portion in the figure) in which aluminum remains and a light transmitting region 6d in which aluminum is dissolved. The light transmission region 6d is linearly formed as transparent or translucent, and becomes a latent image background pixel 6d. Further, the transparent area 6e around the hologram image area 6 includes the diffraction grating 5 and / or a flat surface formed in the hologram processing layer 4, and it is desirable that the transparent area 6e is transparent or translucent with a light transmitting member. Further, an adhesive layer 8 is laminated below the mask layer 7, the latent image pixel 6b, the latent image background pixel 6d, and the transparent region 6e so that the entire thickness of the hologram sheet 1 is substantially uniform. As a method of forming a transparent or translucent region made of a light transmissive member on the hologram sheet 1, a mask layer is formed on the diffraction grating 5 of the hologram processing layer 4 with water-soluble ink, and then vacuum deposition or the like is used. A method may be used in which a light reflecting member is closely attached, the mask layer is removed, and a transparent or translucent layer is formed. Note that the hologram forming layer 3 in FIG. 3A is shown to have a considerable thickness for convenience of explanation, but in an actual configuration, it is an extremely thin layer, and the hologram forming layer 3 in FIGS. The hologram forming layer 3 has the same thickness.

  The sheet base material 2a of the hologram sheet base material 2 is preferably a transparent plastic. For example, a known resin such as PET may be used. The release layer 2b, the hologram processing layer 4, and the adhesive layer 8 may be appropriately selected from known resins such as thermoplasticity and thermosetting, but the hologram processing layer 4 is a transparent or translucent material that is a light-transmitting member. Resin is desirable. The light reflecting member includes aluminum, copper, nickel, tin, etc., but aluminum having high luminance and advantageous in terms of economy is suitable, and may be formed using vacuum deposition or sputtering. Moreover, when aluminum is used for the light reflective member, a thickness of 100 to 2000 mm is desirable.

(Attaching method of hologram forming layer)
FIG. 3B is a schematic diagram in which the hologram forming layer 3 which is a part of the hologram sheet 1 is pasted on the base material 10 by pressing the hologram sheet 1 against the base material 10 using the stamp S heated at high temperature. FIG. At this time, the adhesive layer 8 is preferably a hot melt material so as to be melted by heat and fixed to the base material 10. At the time of pasting, the positioning mark 9 shown in FIG. 1 may be read and pasted with an optical sensor. FIG. 3C is a diagram in which the hologram forming layer 3 is stuck on the base material 10 after being pressed with the marking S. Accordingly, the hologram forming layer 3 attached to the substrate 10 is a region pressed by the marking S, and the hologram sheet substrate 2 (sheet substrate 2a) formed in an upper layer than the hologram forming layer 3 is used. And the release layer 2b) is peeled off and is not attached to the substrate 10. However, if the release layer 2b is transparent or translucent, even if it remains on the surface layer of the hologram forming layer 3, the hologram effect is not hindered, and therefore the release layer 2b may remain somewhat. The substrate 10 is preferably paper, plastic, cloth, film or the like.

(Thickness of hologram sheet)
3A to 3C are schematic diagrams. In the actual hologram sheet 1, the thickness of the sheet substrate 2a is 0.015 mm to 0.025 mm, and the hologram formation to be attached to the substrate 10 is performed. The thickness of the layer 3 is desirably 0.005 mm to 0.030 mm, and it is effective to prevent forgery if the thickness of the hologram forming layer 3 is extremely thin.

(Configuration of diffraction grating)
The structure of the diffraction grating 5 of the hologram forming layer 3 is not particularly limited as long as it uses a well-known hologram having a fine concavo-convex pattern such as a well-known relief hologram or rainbow hologram.

(Configuration of latent image pixel and latent image background pixel)
4 to 9 are enlarged views of the hologram forming layer 3 attached to the base material 10 shown in FIG. 4 to 9 show an embodiment provided with a latent image image pixel 6b and a latent image background pixel 6d by a light transmissive member, which is a feature of the present invention. For example, a hologram which is a part of the hologram sheet 1 is shown. The forming layer 3 is attached to the base material 10 with an attaching machine or the like, and the hologram image region 6 that is a part of the hologram forming layer 3 and the transparent region 6e in the periphery thereof are attached to the base material 10. In addition, the hologram sheet 1 according to the present invention divides the hologram image area 6 of the hologram sheet 1 into a latent image area and a latent image background area, and the latent image area includes a plurality of latent image images made of a light transmissive member. A pixel 6b and a light reflecting region 6a made of a light reflecting member are provided, and a plurality of latent image background pixels 6d made of a light transmissive member and a light reflecting region 6c made of a light reflecting member are provided in the latent image background region. Provided. 4 to 9, the layer configuration of the hologram sheet is the same, but the configurations of the latent image pixel 6b and the latent image background pixel 6d made of a light transmitting member are different.

  FIG. 4 shows an embodiment of the present invention. The hologram image region 6 has a latent image pixel 6b and a latent image background pixel 6d made of a light-transmitting member, each pixel being a circle and having an area. It is a hologram patch formed differently (precisely, the hologram forming layer 3 is stuck on the base material 10), and the letter “P” is formed in the latent image area.

  FIG. 5 shows an embodiment of the present invention, which has a latent image pixel 6b and a latent image background pixel 6d made of a light-transmitting member in the hologram image region 6, each pixel being square and having an area. It is a hologram patch formed differently, and the letter “P” is formed in the latent image area.

  FIG. 6 shows an embodiment of the present invention. The hologram image region 6 has a latent image pixel 6b and a latent image background pixel 6d made of a light-transmitting member. Each pixel has a character and an area. It is a hologram patch formed differently, and the letter “P” is formed in the latent image area.

  FIG. 7 shows an embodiment of the present invention. The hologram image area 6 has a latent image image pixel 6b and a latent image background pixel 6d made of a light transmissive member. Each pixel has a triangular shape and a direction ( Or a hologram patch formed with different directions), and the letter “P” is formed in the latent image area.

  FIG. 8 shows an embodiment of the present invention. The hologram image area 6 has a latent image pixel 6b and a latent image background pixel 6d made of a light transmissive member. Each pixel is round and has a unit per unit. The hologram paste is formed with different pixel densities, and the letter “P” is formed in the latent image area.

  FIG. 9 shows an embodiment of the present invention, which has a latent image pixel 6b and a latent image background line 6d made of a light-transmitting member in the hologram image region 6, the pixel is a square, the line is a straight line, and It is a hologram patch formed with the same density per unit of the pixel and the line, and a letter “P” is formed in the latent image area.

(Hologram effect)
When the hologram forming layer 3 shown in FIGS. 4 to 9 is used, the unique effect of the present invention can be obtained. That is, as shown in FIG. 10, when viewed in a “reflected state” from the surface of the base material 10 to which the hologram forming layer 3 is attached (the surface on which the hologram forming layer 3 is attached to the base material 10), As described above, the diffracted light from the diffraction grating 5 allows visual observation of various hologram effects depending on the observation angle. Specifically, it can be confirmed that a plurality of symbols appear and the color of the symbol changes depending on the observation angle. For example, in FIG. 11, (a) is a letter and color “A” when observed at a predetermined angle in the X direction, and (b) is a pattern and color of “sun” when observed at a predetermined angle in the X direction. (C) shows a “star” design and color when observed at a predetermined angle in the Y direction, and (d) shows a hologram effect in which a “square” design and color appears when observed at a predetermined angle in the Y direction. ing. However, the number of hologram images that appear depending on the observation angle and the method of changing the image (switching, movement, expansion, contraction, etc.) of the hologram image are not particularly limited, and there is no problem even if the hologram effect is one pattern. On the other hand, the latent image image pixel 6b and the latent image background pixel 6d made of a light transmissive member in the hologram image region 6 are fine and are composed of a latent image image region and a latent image background region. Therefore, since the concealability (or latent image formation) is high and cannot be seen in the reflection state, the hologram effect is not inhibited by the latent image image pixel 6b and the latent image background pixel 6d when the hologram effect is viewed.

(Latent image effect)
FIG. 12 shows a case where the substrate 10 on which the hologram forming layer 3 in FIGS. 4 to 9 is attached is viewed in a “transmission state” from the back surface (the opposite surface on which the hologram 1a is attached to the substrate 10). is there. At this time, although the hologram effect cannot be visually observed, the latent image pixel 6b and the latent image background pixel 6d described with reference to FIGS. 4 to 9 do not have a light reflecting member and are transparent. Transparent. Therefore, the latent image pixel 6b in the latent image region and the latent image background pixel 6d in the latent image background region can be visually observed in a transmissive state. Further, due to the difference in the amount of transmitted light between the latent image image pixel 6b and the latent image background pixel 6d and the difference in the directionality of the transmitted light, the letter “P” in the latent image area shown in FIGS. Visible. Note that the latent image pixel 6b and the latent image background pixel 6d are so fine that it is difficult to see one by one. However, by forming a plurality of pixels in the latent image region and the latent image background region, the amount of transmitted light is reduced. And the difference in the direction of transmitted light become noticeable, and the character information “P” or latent image information in the latent image area can be easily visually confirmed. At this time, the substrate 10 needs to be made of a material or material that transmits light. In addition, when viewing in the transmission state, the same latent image effect can be obtained even when viewing from the surface (hologram forming layer 3 side). Information including the latent image area may be appropriately selected from characters, numbers, symbols, marks, and the like.

  A hologram forming layer 3 which is a part of the hologram sheet 1 shown in FIG. FIG. 4 is an enlarged view of the hologram forming layer 3 of FIG. 2, and is also a schematic view visually observed in a transmission state. For example, as shown in FIG. 4, a hologram forming layer 3 having a hologram image region 6 and a transparent region 6 e around the hologram image region 6 is attached to a base material 10 such as paper. The hologram image area 6 has a latent image area and a latent image background area. In the latent image area, latent image image pixels 6b made of a light transmissive member are formed. The latent image pixel 6b is transparent or translucent and has a fine shape so that the latent image pixel 6b cannot be viewed in the reflective state. Although the latent image pixel 6b is a circle and the diameter W1 is 0.20 mm, a range of 0.15 mm to 0.25 mm is preferable. The circular pitches P in the vertical and horizontal directions of the latent image pixels 6b are 1.00 mm and are arranged at equal intervals in a matrix shape, but a range of 0.60 mm to 2.00 mm is preferable. In addition, a light reflecting region 6a made of a light reflecting member is formed in the background of the latent image pixel 6b. On the other hand, latent image background pixels 6d made of a light transmissive member are formed in the latent image background region. The latent image background pixel 6d is also formed to be transparent or semi-transparent and fine so that it cannot be seen in the reflected state. For example, although the latent image pixel 6b is a circle and the diameter W2 is 0.10 mm, a range of 0.05 mm to 0.15 mm is preferable. The circular pitch P in the vertical and horizontal directions of the latent image background pixel 6d is 1.00 mm and is arranged in a matrix at equal intervals, but a range of 0.60 mm to 2.00 mm is preferable. A light reflection region 6c made of a light reflective member is formed in the background of the latent image background pixel 6d. Furthermore, the latent image pixel 6b and the latent image background pixel 6d are formed on the same extension line in the vertical and horizontal directions, while the light reflection area 6a and the light reflection area 6c are the same as the latent image area. It is continuously formed at the boundary portion of the latent image background region. However, the diameter and the circle pitch of the latent image pixel 6b and the latent image background pixel 6d are not limited to the above-mentioned numerical values, and may be appropriately selected. However, FIG. 4 does not show the circular pitch P in the horizontal direction of the latent image background pixel 6d, but it is the same as the circular pitch P in the vertical direction.

  When the hologram forming layer 3 shown in FIG. 4 is viewed in a reflective state, a hologram effect appears due to the diffraction grating 5 including the light reflection region 6a and the light reflection region 6c. Specifically, this is the same as the hologram effect shown in FIGS. However, the latent image pixel 6b and the latent image background pixel 6d are not visible in the reflective state. 4 shows that the latent image pixel 6b (or latent image pixel group) and the latent image background pixel 6d (or latent image background pixel group) can be viewed when the hologram forming layer 3 is viewed in a transparent state. The letter “P” consisting of the latent image area is visible. Specifically, it is the same as the latent image effect shown in FIG. Therefore, the hologram forming layer 3 shown in FIG. 4 can be visually discriminated by two methods: a reflection state and a transmission state. In the present embodiment, the diameter of the latent image background pixel 6d is smaller than that of the latent image pixel 6b. However, the reverse configuration does not change the effect of the present invention. Further, the latent image pixel 6b and the latent image background pixel 6d are not necessarily in a matrix form and regular. In addition, it is desirable to use aluminum as the light reflecting member, and the hologram processing layer 4 serving as the light reflecting member to use a transparent or translucent thermoplastic resin, a thermosetting resin, or a combination thereof. In this embodiment, all the latent image pixels 6b arranged in the latent image area are shown with the same diameter and pitch. However, if the latent image pixels 6b are arranged in the latent image area, The diameter or pitch of some of the latent image pixels 6b may be changed. For example, the diameter or the diameter of only a part of the latent image pixels 6b near the boundary between the latent image area and the latent image background area may be changed. The pitch may be changed.

  Example 2 to Example 6 differ in the pixel configuration of the latent image pixel 6b and the latent image background pixel 6d in the hologram forming layer 3 attached to the base material 10 of Example 1, but the hologram layer configuration and effects. Are the same. Therefore, description of the same structure is abbreviate | omitted and only a different structure is demonstrated.

  FIG. 5 is an example in which the latent image pixel 6b and the latent image background pixel 6d according to the first embodiment are rectangular in shape, and the areas of the latent image pixel 6b and the latent image background pixel 6d are different. For example, the long side W1 of the rectangle that is the latent image pixel 6b is 0.60 mm, and the short side W2 is 0.20 mm. Adjacent latent image image pixels 6b are arranged at equal intervals in a matrix with a pitch P of 1.00 mm in the vertical and horizontal directions. On the other hand, the long side W3 of the rectangle which is the latent image background pixel 6d is 0.60 mm, and the short side W4 is 0.10 mm. Adjacent latent image image pixels 6b are arranged at equal intervals in a matrix with a pitch P of 1.00 mm in the vertical and horizontal directions. Further, the latent image pixel 6b and the latent image background pixel 6d are formed on the same extension line in the vertical and horizontal directions. However, the size and pitch of the latent image pixel 6b and the latent image background pixel 6d are not limited to the above-mentioned numerical values, and may be selected as appropriate. When configured in this embodiment, the same hologram effect and latent image effect as in Embodiment 1 can be obtained.

  FIG. 6 is an example in which the latent image pixel 6b and the latent image background pixel 6d according to the first embodiment are different in the areas of the latent image image pixel 6b and the latent image background pixel 6d using the pixel shapes of the characters. For example, the character height W1 of the latent image pixel 6b is 0.70 mm, and the character line width is 0.15 mm. The pitches P in the vertical and horizontal directions of the adjacent latent image image pixels 6b are 1.50 mm and are arranged at equal intervals in a matrix. On the other hand, the character height W2 of the latent image background pixel 6d is 0.65 mm, and the character line width is 0.12 mm. Adjacent latent image background pixels 6d are arranged at equal intervals in a matrix with a pitch P of 1.50 mm in the vertical and horizontal directions. Further, the latent image pixel 6b and the latent image background pixel 6d are formed on the same extension line in the vertical and horizontal directions. However, the height and pitch of the characters of the latent image pixel 6b and the latent image background pixel 6d are not limited to the above-described numerical values, and may be selected as appropriate. In addition, the character font of the latent image pixel 6b and the latent image background pixel 6d makes the latent image pixel 6b and the latent image background pixel 6d more latent (not visible) when the hologram 1a is viewed in a reflected state. ), It is desirable to use the same typeface. On the other hand, when it is desired to further improve the latent image effect when viewing the hologram forming layer 3 in a transmissive state, it is desirable to make the character fonts different. When configured in this embodiment, the same hologram effect and latent image effect as in Embodiment 1 can be obtained.

  In FIG. 7, the latent image pixel 6b and the latent image background pixel 6d according to the first embodiment are triangular in shape, and the latent image pixel 6b and the latent image background pixel 6d have the same area and have the same orientation (or direction). Is a different example. For example, the height W1 of the triangle that is the latent image pixel 6b and the latent image background pixel 6d is 0.20 mm, and the base W2 is 0.15 mm. Adjacent latent image pixel 6b and latent image background pixel 6d are arranged at equal intervals in a matrix with a pitch P of 1.00 mm in the vertical and horizontal directions. Further, the latent image pixel 6b and the latent image background pixel 6d are formed on the same extension line in the vertical and horizontal directions, and the latent image pixel 6b is formed at a different angle from the latent image background pixel 6d. Yes. Specifically, the latent image image pixel 6b and the latent image background pixel 6d are arranged such that the latent image image pixel 6b is arranged in a first direction such that the vertex is directed to the left with respect to the base of the triangle. 6d is arranged in the second direction such that the vertex is directed upward with respect to the base of the triangle, the first and second directions are different and have anisotropy. Note that the size and pitch of the latent image pixel 6b and the latent image background pixel 6d are not limited to the above-described numerical values, and may be appropriately selected.

  When configured in this embodiment, the same hologram effect and latent image effect as in Embodiment 1 can be obtained. However, the principle that the latent image effect appears when viewed in the transmissive state is not the difference in pixel area between the first to third embodiments (more precisely, the difference in the amount of light transmitted from the pixel), but the vertical and horizontal directions depending on the pixel. The latent image effect appears due to the difference in directionality (more precisely, the difference in directionality due to light in the vertical and horizontal directions transmitted from the pixels).

  In FIG. 8, the second latent image pixel 6f is added to the latent image pixel 6b and the latent image background pixel 6d of the first embodiment, and the pixel shape is changed to a circle so that the latent image pixel 6b and the latent image pixel 6f. In this example, the circular areas of the latent image background pixels 6d are the same, and the circular density per unit is different between the latent image area and the latent image background area. For example, as shown in the enlarged view of FIG. 8, the latent image pixels 6b are the first, third, and fifth rows from the top of the latent image area, and are arranged in the horizontal direction. It is a circle. On the other hand, the latent image pixel 6f is a circle that is arranged in the second and fourth rows from the top in the latent image region, and three are arranged in the horizontal direction. The latent image background pixel 6d is a circle formed in the latent image background area. At this time, the diameter W of each of the circles that are the latent image pixel 6b, the latent image pixel 6f, and the latent image background pixel 6d is 0.15 mm, and the pitch P of each of the circles is 1.00 mm. Furthermore, the latent image pixel 6b and the latent image background pixel 6d are formed in a matrix on the same extension line in the vertical and horizontal directions, and the latent image pixel 6f is positioned relative to the position of the latent image pixel 6b. It is desirable to form a matrix by shifting the vertical and horizontal directions by a half pitch. However, the size and pitch of the latent image pixel 6b, the latent image pixel 6f, and the latent image background pixel 6d are not limited to the above-described numerical values, and may be appropriately selected.

  When configured in this embodiment, the same hologram effect and latent image effect as in Embodiment 1 can be obtained. However, the principle that the latent image effect appears when viewed in the transmissive state is the same as in the first to third embodiments, and uses the difference in pixel density (more precisely, the difference in the amount of light transmitted from the pixel). However, the density is not the size of the pixel, and the latent image effect appears due to the difference in pixel density per unit (more precisely, the difference in the amount of light transmitted from the pixel).

  In FIG. 9, the latent image pixel 6b of the first embodiment is squared to form a latent image background line 6d instead of the latent image background pixel 6d, and the square area per unit in the latent image region and the latent image background region This is an example in which the line area per unit is the same. For example, the length W1 of one side of the square that is the latent image pixel 6b is 0.20 mm. Adjacent latent image image pixels 6b have a horizontal pitch P1 of 0.40 mm and a vertical pitch P2 of 1.00 mm. On the other hand, the line width W2 of the latent image background line 6d is 0.10 mm, and the line pitch P2 of the adjacent latent image background line 6d is 1.00 mm. Further, the latent image pixel 6b and the latent image background line 6d are on the same extension line in the horizontal direction, and the square area per unit in the latent image area and the line area per unit in the latent image background area. Are formed identically. Further, the square area per unit in the latent image area and the line area per unit in the latent image background area may be formed differently. However, the size and pitch of the latent image pixel 6b and the latent image background pixel 6d are not limited to the above-mentioned numerical values, and may be selected as appropriate. The configuration of the latent image area and the latent image background area may be reversed.

  When configured in this embodiment, the same hologram effect and latent image effect as in Embodiment 1 can be obtained. However, the principle that the latent image effect appears when viewed in the transmissive state is not the difference in pixel density in the first to third embodiments (more precisely, the difference in the amount of light transmitted from the pixel), but the pixel or line. The latent image effect appears due to the difference in shape (more precisely, the difference in shape of light transmitted from the pixel).

  In the first to sixth embodiments, the structure of the latent image area (or latent image image pixel 6b) (or the structure that can be viewed in the reflected state) is described with the letter “P”. Not limited to symbols and marks. Further, the latent image pixel 6b and the latent image background pixel 6d may be a graphic or a mark in addition to a polygon, a circle, or a character.

  Further, in Examples 1 to 6, in order to make the latent image pixel 6b and the latent image background pixel 6d more latent and less visible when viewed in a reflective state, the hologram forming layer 3 Although the latent image pixel 6b and the latent image background pixel 6d are formed in almost the entire area with respect to the hologram image area 6, a part of the hologram image area 6, for example, a 1/2 or 1/4 area May be formed.

  Furthermore, in order to form a latent image (or camouflage) when the hologram forming layer 3 is viewed in a reflected state, the light reflecting member has high brightness and high glossiness, and higher diffracted light. For example, aluminum is preferable. In addition, as the color of the base material 10 to which the hologram forming layer 3 is attached, the formation of a latent image is improved by using a base material of an intermediate color excluding white or the primary color or printing the intermediate color on the base material.

  In the embodiment, the base material 10 is described as paper. However, the same effect can be obtained by using a transparent plastic card, plastic film, glass, nonwoven fabric, cloth, or the like. FIGS. 4 to 9 for explaining the first to sixth embodiments show the latent image pixel and the latent image background pixel in an enlarged manner for the sake of convenience, and the actual configuration is minute and the size shown in FIG. Not configured. Further, as described above, it is desirable that the latent image image pixel and the latent image background pixel are not visible in the reflection state, but even if the latent image image pixel or a part of the latent image background pixel is slightly visible in the reflection state. The information of the latent image area (for example, “P” cannot be recognized (or is not noticed) in Examples 1 to 6) and the visibility of the hologram effect is not significantly impaired. Within the scope of thought.

It is a perspective view of the hologram sheet of the present invention. It is a schematic diagram when the hologram formation layer of this invention is stuck on the base material. It is sectional drawing of the hologram sheet of this invention. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic diagram of one Example when the hologram formation layer in this invention is affixed on the base material, and the schematic diagram visually observed in the permeation | transmission state. It is the schematic seen visually in the reflective state when the hologram formation layer in this invention is stuck on the base material. It is the schematic which shows the latent image effect when the hologram formation layer in this invention is affixed on the base material. It is the schematic seen visually in the transmission state when the hologram formation layer in this invention is stuck on the base material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hologram sheet 2 Hologram sheet base material 2a Sheet base material 2b Peeling layer 3 Hologram formation layer 4 Hologram processing layer 5 Diffraction grating 5a Concavity and convexity 5b with light reflecting member in close contact 6 Concavity and convexity made of light transmitting member 6 Hologram image regions 6a and 6c Light reflecting areas 6b, 6d, 6f made of a light reflecting member Pixel 6e made of a light transmissive member 7 Transparent area made of a light transmissive member 7 Mask layer 8 Adhesive layer 9 Positioning mark 10 Substrate S Stamp W, W1, W2 , W3, W4 Pixel size P, P1, P2 Pitch

Claims (12)

A hologram sheet having a hologram forming layer,
On the surface of the diffraction grating formed on one surface of the hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region,
In the latent image area, a latent image pixel having a first area made of a light transmissive member and a first light reflecting area made of a light reflective member formed on a background of the latent image image pixel are provided. Have
The latent image background region includes a second area latent image background pixel made of a light transmissive member and a second light reflective region made of a light reflective member formed on the background of the latent image background pixel. Have
The hologram sheet, wherein the areas of the latent image pixel and the latent image background pixel are different. A hologram sheet having a hologram forming layer,
On the surface of the diffraction grating formed on one surface of the hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region,
In the latent image area, a latent image image pixel having a first area and a first direction made of a light transmissive member, and a first light reflecting member formed on the background of the latent image image pixel. And a light reflection area of
The latent image background region includes a latent image background pixel having a second area and a second orientation made of a light transmissive member, and a second light reflecting member formed on the background of the latent image background pixel. And a light reflection area of
The areas of the latent image pixel and the latent image background pixel are the same, and the first orientation of the latent image pixel and the second orientation of the latent image background pixel are different from each other. Hologram sheet. A hologram sheet having a hologram forming layer,
On the surface of the diffraction grating formed on one surface of the hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region,
In the latent image area, a latent image pixel having a first area made of a light transmissive member and a first light reflecting area made of a light reflective member formed on a background of the latent image image pixel are provided. Have
The latent image background region includes a second area latent image background pixel made of a light transmissive member and a second light reflective region made of a light reflective member formed on the background of the latent image background pixel. Have
The hologram sheet, wherein the area of the latent image image pixel and the latent image background pixel are the same, and the pixel density per unit is different between the latent image image region and the latent image background region. A hologram sheet having a hologram forming layer,
On the surface of the diffraction grating formed on one surface of the hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region,
The latent image area includes a latent image pixel formed of a light transmissive member and a first light reflective area formed of a light reflective member formed on the background of the latent image pixel.
The latent image background region has a latent image background line made of a light transmissive member and a second light reflection region made of a light reflective member formed on the background of the latent image background line.
The hologram sheet, wherein the density of the latent image image pixels and the latent image background line per unit is the same or different between the latent image image region and the latent image background region. A hologram sheet having a hologram forming layer,
On the surface of the diffraction grating formed on one surface of the hologram forming layer, there is a hologram image region composed of a latent image region and a latent image background region,
The latent image area includes a latent image line formed of a light transmissive member and a first light reflection area formed of a light reflective member formed on the background of the latent image line.
The latent image background region has a latent image background pixel made of a light transmissive member, and a second light reflective region made of a light reflective member formed on the background of the latent image background pixel,
The hologram sheet, wherein the density of the latent image line per unit and the density of the latent image background pixel are the same or different between the latent image area and the latent image background area. 6. The hologram sheet according to claim 1, wherein the latent image image pixels and / or the latent image background pixels are formed in a matrix. The shape of the latent image image pixel and / or the latent image background pixel is formed of any one of a circle, a polygon, a figure, a mark, or a character. The hologram sheet according to claim 6. The hologram sheet according to claim 2, wherein the latent image image pixel and the latent image background pixel are formed of any one of an ellipse, a polygon, a figure, a mark, or a character having anisotropy. 4. The hologram sheet according to claim 1, wherein the latent image image pixel and the latent image background pixel are formed of characters and are formed of the same typeface or different typefaces. 10. The hologram sheet according to claim 1, wherein a transparent region made of a light-transmitting member is formed around the hologram image region in the hologram forming layer. A printing medium, wherein the hologram forming layer according to any one of claims 1 to 10 is bonded to a printing substrate via an adhesive layer. 12. The print medium according to claim 11, wherein the print medium is a bank note.

Images