KR101374969B1 - A pentaprism and means and method for imaging multiple subjects using the same - Google Patents

Abstract

The technical problem to be achieved by the present invention is to obtain an image of a plurality of subjects, using a single image sensor, penta to obtain an image for a plurality of individual subjects regardless of whether the subject is a remote object or a close object The present invention provides a prism, an imaging means, and an imaging method.
As a means for solving the above technical problem, the present invention is a pentaprism comprising two reflective surfaces and two transmission surfaces, at least one of the two reflection surfaces, to switch to reflect or transmit light on the reflection surface Possible reflecting means; It provides a pentaprism comprising a.
Although the imaging means for the perspective subject using the pentaprism according to the present invention has only one image sensor, it is possible to acquire a plurality of individual subjects, and at the same time the image of the subject at a distance with respect to the subject close to the image There is an effect that can be obtained.

Description

Pentaprism and imaging means and imaging method for a plurality of subjects using the same {A PENTAPRISM AND MEANS AND METHOD FOR IMAGING MULTIPLE SUBJECTS USING THE SAME}

The present invention relates to a pentaprism and an imaging means and imaging method for a plurality of subjects using the same, and more particularly, to an imaging means and an imaging method capable of acquiring images for a plurality of subjects using one pentaprism. will be.

The pentaprism is a reflective prism with five sides, as shown in FIG. 1, and refracts incident light at 90 °.

The "first side" 11 of the pentaprism with five sides refers to the transmissive side of the incident light for refracting at 90 ° from the pentaprism 1 and the "second side" 12 is the first side. Refers to the first side on which the light incident from the face 11 is reflected, and the “third side” 13 refers to the second side to reflect back the light reflected from the second side 12, and the “fourth side”. "14" refers to the surface through which light reflected from the third surface 13 is transmitted to exit the pentaprism 1, and the "fifth surface" 15 refers to the light incident on the pentaprism 1. As a surface which is not optically used to refract at 90 °, it refers to a surface provided between the second surface 12 and the third surface 13, which will be described below based on the terms as described above. .

As shown in FIG. 1, the pentaprism 1 provided from the first surface 11 to the fifth surface 15 transmits light emitted from the subject a through the first surface 11. Reflected sequentially on the second surface 12 and the third surface 13, and finally transmitted through the fourth surface 14, thereby forming an image (b) refracted by 90 degrees.

This pentaprism 1 is generally for a viewfinder of a single-lens reflex (SLR) camera 20 (hereinafter referred to as an "SLR camera"), as shown in FIG. Used as That is, the SLR camera 20 that receives the light from the subject through the lens 21 reflects the light through the mirror 22. In order to observe the subject through the viewfinder 23, the mirror is used. The light reflected through 22 must be refracted, and at this time, pentaprism 1 is used.

Looking at the process of acquiring an image of a close or contacted subject using the SLR camera 20, when the shutter is opened, the mirror 22 is up, and thus the lens ( Light incident through 21 is converted into an electrical signal through the image sensor 24 to obtain an image.

Unlike this, an example for obtaining an image of a subject approaching or touching is described with reference to FIG. 3.

FIG. 3 is a diagram schematically illustrating a structure of an optical fingerprint input device for acquiring a finger fingerprint by using a triangular prism.

As shown in FIG. 3, a process of acquiring a finger fingerprint through the optical fingerprint inputter 30 is directed to another finger of the triangular prism 32 toward the finger fingerprint in contact with one surface of the triangular prism 31. The light source 32 irradiates light through the surface, and the irradiated light is refracted and reflected according to the curvature of the fingerprint on one surface of the triangular prism 31, and is emitted to another surface of the triangular prism 31. The image sensor 34 is exposed through the lens 33 to obtain an image of the fingerprint.

As described above, in order to obtain an image of a subject in close proximity or contact with a remote subject, a separate and independent apparatus for each subject is required. In particular, in order to control access to a specific person, an image sensor for acquiring an image of a face and an image sensor for acquiring an image of a fingerprint must be separately provided in order to recognize both a face and a fingerprint of a specific person. There is.

Accordingly, in order to solve the above problem, a necessary technique for simultaneously acquiring an image of a near or contacted subject as well as a remote subject is urgently required.

The technical problem to be achieved by the present invention is to obtain an image of a plurality of subjects, using a single image sensor, penta to obtain an image for a plurality of individual subjects regardless of whether the subject is a remote object or a close object The present invention provides a prism, an imaging means, and an imaging method.

As a means for solving the above technical problem, the present invention provides a pentaprism comprising two reflective surfaces and two transmission surfaces, at least one of the two reflection surface reflection means switchable to reflect or transmit light; It provides a pentaprism comprising a.

Preferably, at least one reflector plate at least one surface can reflect light; And driving means for moving the reflecting plate so that the reflecting plate opens and closes the reflecting surface. It provides a pentaprism comprising a.

In addition, the present invention provides an image pickup means using the penta prism, the penta prism; And an imaging unit positioned on an optical axis of light emitted from one of the two transmission surfaces to acquire an image of the light. It provides an image pickup means for a plurality of subjects using a pentaprism comprising a.

Preferably, a light source that transmits the reflective surface of any one of the two reflective surfaces, to provide light to the other reflective surface; It provides an imaging means for a plurality of subjects using a pentaprism further comprising.

Preferably, the lens located in front of the image pickup unit, the light condensing light; It provides an image pickup means for a plurality of subjects using a pentaprism characterized in that it further comprises.

Preferably, the imaging unit is provided with an image sensor for a plurality of subjects using a pentaprism, characterized in that the image sensor is exposed to light to convert the light into an electrical signal.

In addition, the present invention provides an image pickup method for a plurality of subjects using the image pickup means, the method comprising: (a) closing the reflective means such that the two reflective surfaces are not exposed; And (b) acquiring an image of the first subject by the light incident from the first subject through one of the two transmissive surfaces; It provides an imaging method for a plurality of subjects using a pentaprism comprising a.

In addition, the present invention provides an image pickup method for a plurality of subjects using the image pickup means, the method comprising: (a) opening the reflecting means to expose at least one of the two reflection surfaces; And (b) acquiring an image of the second subject by the light incident from the second subject through the exposed reflection surface; It provides an imaging method for a plurality of subjects using a pentaprism comprising a.

Advantageously, prior to step (b), the light source provides light to the second subject toward the exposed reflective surface; It provides an image pickup method for a plurality of subjects using a pentaprism characterized in that it further comprises.

Preferably, the providing of the light provides an imaging method for a plurality of subjects using pentaprism, wherein the light provided by the light source transmits both reflection surfaces.

Pentaprism according to the present invention and the imaging means and imaging method for a plurality of subjects using the same, even if only one image sensor, it is possible to obtain an image for a plurality of subjects through different surfaces.

In addition, according to the present invention, there is an effect of acquiring the image at the same time as the image of the subject at a distance even for a close subject.

1 is a perspective view of a pentaprism.
2 is a view schematically showing the structure of an SLR camera having a pentaprism.
FIG. 3 is a diagram schematically illustrating a structure of an optical fingerprint input device for acquiring a finger fingerprint by using a triangular prism.
4 is a diagram schematically illustrating a structure of a pentaprism and an imaging unit for a plurality of subjects using the same according to an embodiment of the present invention.
5 and 6 are views briefly showing the operation of the image pickup means for a plurality of subjects using a pentaprism according to an embodiment of the present invention.
7A to 7D are views schematically illustrating an example of a reflecting means of a pentaprism according to an embodiment of the present invention.
8 is a view briefly illustrating each step of the imaging method for a plurality of subjects using a pentaprism according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Pentaprism

In the conventional pentaprism 1, as shown in FIG. 1, light transmitted through the first surface 11 is reflected by the second surface 12 and the third surface 13. That is, the general pentaprism 1 has a total internal reflection because the angle of incidence of light on the second surface 12 and the third surface 13 is smaller than the minimum angle (critical angle) at which total reflection can occur. It does not cause reflection, and therefore is generally coated with reflection so that light can be reflected on two surfaces 12 and 13.

As shown in FIG. 4, the pentaprism 100 according to the present invention, unlike the conventional pentaprism 1, at least one of the two reflective surfaces 102 and 103 may reflect or transmit light. It includes switchable reflecting means (102a, 103a), if necessary to reflect the incident light transmitted through the first surface 101, or the external light source 120 or the second subject (b) Allow light from to pass through.

In order to switch the function of the reflecting means 102a and 103a to reflect or transmit light, the reflecting means 102a and 103a may include at least one or more reflecting plates 102a 'and 103a' on which at least one surface may reflect light. And the reflecting plates 102a 'and 103a' may include driving means (not shown) for moving the reflecting plates 102a 'and 103a' to open and close the reflecting surfaces 102 and 103.

Specific means for the reflecting means (102a, 103a) can be presented in various ways, the present invention is not limited to this, as an example, the reflecting means of the pentaprism according to an embodiment of the present invention in Figure 7a to 7d Is shown briefly as an example.

Looking at each example with reference to the drawings, as an example for the reflecting means (102a, 103a), as shown in Figure 7a, by an operation such as a camera shutter, that is, sequentially shown in Figure 7a (c) 7a (b)-7a (a) to reflect light or sequentially transmit light by the operations of FIGS. 7a (a)-7a (b)-7a (c). Can be. That is, at least one surface of the plurality of reflecting plates 102a 'and 103a' including the interior angle within 90 ° is reflective coated or a mirror is attached, and each of the reflecting plates 102a 'and 103a' is each within 90 °. Drive means are provided so that the corners abut or overlap each other so that the cabinets are gathered about one point, and the respective reflecting plates 102a 'and 103a' slide along the corners where they meet or overlap with the other reflecting plates 102a 'and 103a'. As a result, when the reflecting plates 102a 'and 103a' slide inward, as shown in FIG. When reflecting light incident from the other side or the reflecting plates 102a 'and 103a' slide outwards, as shown in FIG. 7A (c), the plurality of reflecting plates 102a 'and 103a' are half The slopes 102 and 103 are exposed to the outside, so as to pentaprism into the interior. Can be made to transmit the incident light.

In addition, as another example of the reflecting means (102a, 103a), as shown in Figure 7b, sequentially with Figures 7b (a)-7b (b)-7b (c)-7b (d) The light may be reflected by the same operation, or the light may be sequentially transmitted by the operation shown in FIGS. 7B (d) to 7B (c) to 7B (b) to 7B (a). That is, at least one surface of the film-shaped reflector plates 102a ', 103a' is provided with a polygonal (including circular) frame (s), one of the film-shaped reflector plates (102a ', 103a') The end is fixed to one side of the frame s, and the other end is moved by the driving means along two parallel sides of the frame s, whereby the other end of the film-shaped reflector plates 102a 'and 103a' By moving along two side by side of s), the inner space of the frame s is opened and closed, so that the reflective surfaces 102 and 103 of the pentaprism 100 reflect the light incident from the inside of the pentaprism to another surface. Or to transmit light incident from the inside of the pentaprism.

In addition, as another example of the reflecting means (102a, 103a), as shown in Figure 7c, by sequentially reflecting the light by the operation as shown in Figure 7c (a) to Figure 7c (b), or sequentially It is possible to transmit light by the operation as shown in Fig. 7c (b)-7c (a). That is, the reflective plates 102a 'and 103a' having at least one surface coated with a mirror or the like are provided in the frame s of polygons (including a circle), and the reflecting plates 102a 'and 103a' are driving means. By sliding and moving to one side on the frame s by means of FIG. 7C (a), the empty inner space and the reflecting surfaces 102 and 103 of the frame s are reflected plates 102a 'and 103a'. ), The light incident from the inside of the prism can be reflected to another surface. Meanwhile, as shown in FIG. 7C (b), the reflecting plates 102a 'and 103a' are formed on the frame s. When moved to one side of the frame s by the driving means, the reflective surfaces 102 and 103 may be exposed to the outside through the empty inner space of the frame s so as to transmit light incident from the inside of the pentaprism. .

In addition, as another example of the reflecting means (102a, 103a), as shown in Figure 7d, by sequentially reflecting the light by the operation as shown in Figure 7d (a) -7d (b), or sequentially It is possible to transmit light by the operation shown in FIGS. 7D (b) to 7D (a). That is, on the frame s of a polygon (including a circle), reflecting plates 102a 'and 103a' having at least one surface coated with a mirror or having a mirror or the like are fixed so as to pivot about a point. As shown in 7d (a), the reflecting plates 102a 'and 103a' cover the empty inner space of the frame s before the rotation and the reflecting surfaces 102 and 103 so that the light incident from the inside of the prism is transferred to another surface. 7d (b), the reflecting plates 102a 'and 103a' are rotated about an axis, and the reflecting surfaces 102 and 103 are moved through the empty inner space of the frame s. By exposing the light to the outside, light incident from the inside of the prism can be transmitted.

The reflecting means 102a and 103a allow at least one of the reflecting surfaces 102 and 103 of the pentaprism 100 to reflect or transmit light, so that only one first surface (as in the conventional pentaprism 1) 11) is not limited to the function of refracting the light incident from the 90 ° to be emitted through the fourth surface 14, the light is incident from multiple subjects or multiple light sources utilizing the other surface (102, 103) You can do that.

For multiple subjects using pentaprism Imaging  Way

4 is a diagram schematically illustrating a structure of a pentaprism and an imaging unit for a plurality of subjects using the same according to an embodiment of the present invention.

As shown in FIG. 4, the image pickup means for the plurality of subjects using the pentaprism 100 according to the present invention is provided with respect to the subject by light emitted through the pentaprism 100 in addition to the pentaprism 100. By including the image pickup unit 110 to acquire an image, not only the image (a ') for the first subject (a) incident through the one transmissive surface 101, but also the second incident through the one reflective surface (103) It is possible to acquire an image b 'of the two subjects b.

Pentaprism 100 according to the present invention is provided with reflecting means (102, 103) capable of switching the reflection and transmission of light on at least one reflective surface of the conventional panta prism (1), a detailed description thereof Since it is the same as the above, it will be omitted.

The imaging unit 110 is positioned on an optical axis of light emitted through one of the two transmissive surfaces 101 and 104, and acquires an image by the light. In other words, the imaging unit 110 may be a film that is exposed to light and is a means for acquiring an image, but may be a film that chemically reacts to and stores the light, but is convenient for storing the image and interworking with other digital devices. In view of the above, it is preferable that the image sensor is exposed to light such as a complementary metal-oxide semiconductor (CMOS) or a charge-coupled device (CCD) to convert light into an electrical signal.

As an example, the operation of each component for acquiring an image of a plurality of subjects may be described. For example, light for the first subject a incident through the first surface 101 may be sequentially displayed in the second surface 102-. By sensing the image capturing unit 110 via the third surface 103-fourth surface 104, the image capturing unit 110 acquires an image a ′ of the first subject a. At this time, the first reflecting means 102a and the second reflecting means 103a cover the two reflecting surfaces 102 and 103 to reflect the light, so that the light passing through the first surface 101 is transferred to the imaging unit 110. It is directed toward the fourth surface 104 located.

At this time, the light to the first subject (a) is not necessarily incident through the first surface 101, and must pass through the path as described above, incident through the fourth surface 104, the third surface 103 ), The second surface 102-the first surface 101 sequentially, the image pickup unit 110 is located on the optical axis transmitted through the first surface 101, the image for the first subject (a) (a ') may be obtained.

On the other hand, the light for the second subject b incident through the third surface 103 passes through the fourth surface 104 to expose the imaging unit 110, whereby the imaging unit 110 receives the second subject. An image b 'of (b) is obtained. At this time, only at least the second reflecting means 103a of the reflecting means 102a and 103a is opened, and the third surface 103 acts to transmit light, so that the light passing through the third surface 103 is transferred to the imaging unit. To the fourth side 104 on which the 110 is located. More preferably, the first reflecting means 102a of the two reflecting means 102a and 103a is also opened so that the light to the first subject a is reflected by the first reflecting means 102a, so that the second subject It is desirable not to interfere with the light for (b).

The light for the second subject b is not necessarily incident through the third surface 103 and passes through the path as described above, and the imaging unit 110 is disposed on the optical axis of the light passing through the first surface 101. ) May be positioned to obtain an image b 'of the second subject b located on the second surface 102.

Thus, even if only one pentaprism 100 according to the present invention is used, various surfaces of the pentaprism 100 may be efficiently utilized to acquire images of a plurality of subjects.

In addition, the imaging means according to the present invention may further include a lens (130). That is, light from the first subject a and / or the second subject b is directed toward the imaging unit 110 through the pentaprism 100 according to the present invention, thereby obtaining an image accordingly. In this case, the lens 130 positioned in front of the imaging unit 110 may capture light transmitted through one surface (the fourth surface 104 in FIG. 4) of the pentaprism 100 where the imaging unit 110 is located. The image may be concentrated at 110, thereby allowing an image having a high resolution to be obtained when the image is acquired by the image capturing unit 110.

Meanwhile, when one of the images of the subject to be acquired using the pentaprism 100 according to the present invention is shown in FIG. 4, the subject should be close to the pentaprism 110 like a finger fingerprint. It is preferable to further include a light source 120 to provide light to the second subject (b).

In this case, the position of the light source 120 may be any one of five surfaces of the pentaprism 100 capable of providing light to the second subject b, but the reflective surface (where the reflecting means 102a and 103a are located) It is preferable that the light source 120 is positioned on the reflective surface 102 of which the subject is not close among 102 and 103 so that light is directly provided to the second subject b located on the other reflective surface 103. . This is because the two reflecting surfaces 102 and 103 are at positions facing each other, so that the light source 120 located on any of the reflecting surfaces can efficiently provide light to the second subject b.

As a result, even when the light for the subject is not provided by being in contact with one surface of the pentaprism 100, the light source 120 provides the light for the subject, so that the image pickup unit 110 of the pentaprism 100 may be used. A clear image can be obtained even for a subject in contact with one surface.

As described above, by utilizing the imaging means according to the present invention, the reflecting means 102a and 103a operate as shown in FIG. 5, thereby acquiring an image of a fingerprint, and simultaneously reflecting means 102a and 103a as shown in FIG. 6. By operating, by acquiring an image of a human face, by using a pentaprism 100, it is effective to build an efficient system when building a security system, as well as fingerprint / face, fingerprint / QR code, etc. It is also very effective to use in complex security authentication.

For multiple subjects using pentaprism Imaging  Way

8 is a view briefly illustrating each step of the imaging method for a plurality of subjects using a pentaprism according to an embodiment of the present invention.

Hereinafter, an image capturing method for a plurality of subjects using the image capturing means according to the present invention will be described with reference to FIGS. 5 and 6.

As illustrated in FIG. 8, in the imaging method for a plurality of subjects using the imaging means according to the present invention, an image acquisition process when the subject is separated from the pentaprism (see FIG. 8A) and the subject is a pentaprism It can be divided into the image acquisition process (see FIG. 8 (b)) when it is close to.

The process of acquiring an image of the first subject a separated from the pentaprism 100 by a predetermined distance is illustrated in FIG. 6. First, the two reflecting means 102a and 103a are formed by the two reflecting surfaces 102,. In operation S10, the image capturing unit 110 may not be exposed to the first subject by light incident from the first subject a through one of the transmissive surfaces from the first subject a. In operation S20, an image a ′ may be acquired. The image a ′ of the first subject may be acquired through the imaging unit 110.

Meanwhile, as shown in FIG. 5, a process of acquiring an image of a second subject approaching or contacting from the pentaprism 100 is performed. First, the reflecting means 102a and 103a of the two reflecting surfaces 102 and 103 are used. Opening at least one or more exposures (S100) and obtaining an image (b ′) of the second subject due to light incident from the second subject (b) through the exposed reflection surface (S200) Including the, through the imaging unit 110, it is possible to obtain an image (b ') for the second subject.

In this case, before the image capturing unit 110 acquires the image b ′ of the second subject, the light source 120 provides light to the second subject b toward the exposed reflection surface 103 ( S150 may be further included, and the light source 120 may be positioned on one surface of the pentaprism 100 such as the fifth surface 105 to provide light to the second subject b. Preferably, the light source 120 is positioned on the reflective surface 102 other than the reflective surface 103 on which the second subject b is located, so that the light provided by the light source 120 is directly exposed to the second surface ( It is preferable to provide light to the second subject b by allowing both of the 102 and the third surface 103 to pass through.

Preferred embodiments of the present invention described above are disclosed to solve the technical problem, and those skilled in the art to which the present invention pertains (man skilled in the art) various modifications, changes, additions, etc. within the spirit and scope of the present invention. It will be possible to, and such modifications, changes, etc. will be considered to be within the scope of the following claims.

1, 100: pentaprism 11, 101: first page
12, 102 page 2 13, 103: page 3
14, 104 page 4 15, 105: page 5
20: SLR Camera 21: Lens
22: mirror 23: viewfinder
24: image sensor 30: optical fingerprint input
31: triangular prism 32: light source
33: lens 34: image sensor
102a: first reflecting means 103a: second reflecting means
110: imaging unit 120: light source
130: lens a: first subject
b: second subject s: frame

Claims (10)

In a pentaprism comprising two reflective and two transmissive surfaces,
At least one of the two reflecting surfaces includes reflecting means switchable to reflect or transmit light,
The reflecting means may include at least one reflective plate capable of reflecting light on at least one surface thereof; And driving means for moving the reflecting plate so that the reflecting plate opens and closes the reflecting surface. Pentaprism comprising a. delete In the imaging means using the pentaprism according to claim 1,
The pentaprism; And
An imaging unit positioned on an optical axis of light emitted from one of the two transmission surfaces to acquire an image of the light;
Imaging means for a plurality of subjects using a pentaprism comprising. The method of claim 3, wherein
A light source passing through one of the two reflection surfaces to provide light to the other reflection surface;
Imaging means for a plurality of subjects using a pentaprism further comprising. The method of claim 3, wherein
A lens positioned at a front end of the imaging unit to collect light;
Imaging means for a plurality of subjects using a pentaprism, characterized in that it further comprises. The method of claim 3, wherein
And the imaging unit is an image sensor that is exposed to light and converts light into an electrical signal. In the imaging method for a plurality of subjects using the imaging means according to claim 3,
(a) closing the reflecting means such that the two reflecting surfaces are not exposed; And
(b) acquiring an image of the first subject by the imaging unit by light incident from the first subject through one of the two transmissive surfaces;
Imaging method for a plurality of subjects using a pentaprism comprising a. In the imaging method for a plurality of subjects using the imaging means according to claim 3,
(a) the reflecting means is opened so that at least one of the two reflecting surfaces is exposed; And
(b) acquiring an image of the second subject by the imaging unit by light incident from the second subject through the exposed reflection surface;
Imaging method for a plurality of subjects using a pentaprism comprising a. The method of claim 8,
Before the step (b)
Providing a light source to the second subject toward the exposed reflective surface;
The imaging method for a plurality of subjects using a pentaprism further comprising a. The method of claim 9,
Providing the light,
And the light provided by the light source transmits both reflection surfaces.

Images