KR20210049031A - Optical device for augmented reality which can prevent ghost images - Google Patents

Abstract

Provided is an augmented reality optical device having a ghost image blocking function. The augmented reality optical device comprises: an optical means for transmitting at least a portion of real object image light, which is image light emitted from a real object, toward the pupil of a user's eye; a first reflection unit disposed inside the optical unit and transmitting the augmented reality image light which is image light corresponding to the image for augmented reality and is emitted from an image output unit to a second reflection unit; and a second reflection unit disposed inside the optical means and providing an image for augmented reality to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflection unit toward the pupil of the user's eye. The optical means has a first surface on which the real object image light is incident, and a second surface from which the augmented reality image light and real object image light transmitted through the second reflection unit are emitted toward the pupil of the user's eye. The augmented reality image light emitted from the image output unit is transmitted to the first reflection unit through the inside of the optical means or is totally reflected from the inner surface of the optical means and transmitted to the first reflection unit. The reflective surface of the first reflection unit that reflects the augmented reality image light is arranged to face the direction in which the augmented reality image light is incident.

Description

Optical device for augmented reality with ghost image blocking function {OPTICAL DEVICE FOR AUGMENTED REALITY WHICH CAN PREVENT GHOST IMAGES}

The present invention relates to an optical device for augmented reality, and more specifically, it is possible to significantly reduce the size, thickness, weight, and volume, and effectively block ghost images to provide clearer images for augmented reality. It relates to an optical device for augmented reality having a function.

Augmented reality (AR) means providing a virtual image or image provided by a computer or the like superimposed on an actual image of the real world, as is well known.

In order to implement such augmented reality, an optical system is required that allows a virtual image or image generated by a device such as a computer to be superimposed on an image of the real world and provided. As such an optical system, a technique using optical means such as a prism for reflecting or refracting a virtual image using a head mounted display (HMD) or a glasses-type device is known.

However, devices using such a conventional optical system have a problem in that the configuration is complicated and the weight and volume are considerable, so that it is inconvenient for the user to wear it, and the manufacturing process is also complicated, so that the manufacturing cost is high.

In addition, conventional devices have a limitation in that the virtual image is out of focus when the user changes the focal length when gazing at the real world. To solve this problem, techniques such as using a configuration such as a prism capable of adjusting a focal length for a virtual image or electrically controlling a variable focal lens according to a change in a focal length have been proposed. However, this technology also has a problem in that a user must perform a separate operation in order to adjust the focal length, or hardware and software such as a separate processor for controlling the focal length are required.

In order to solve such a problem of the prior art, the applicant of the present invention is a device capable of implementing augmented reality by projecting a virtual image on the retina through the pupil using a reflector having a size smaller than that of a human pupil, as described in Patent Document 1 Has been developed.

1 is a diagram showing an optical device 100 for augmented reality as disclosed in Patent Document 1 above.

The augmented reality optical device 100 of FIG. 1 includes an optical unit 10, a reflective unit 30, an image output unit 40, and a frame unit 60.

The optical means 10 is a means for transmitting at least a part of the actual object image light, which is the image light emitted from the actual object, and may be, for example, a spectacle lens, and a reflective unit 30 is embedded therein. In addition, the optical means 10 transmits the augmented reality image light reflected from the reflecting unit 30 to the pupil.

The frame unit 60 is a means for fixing and supporting the image output unit 40 and the optical means 10, and may be, for example, a frame.

The image output unit 40 is a means for emitting augmented reality image light, which is an image light corresponding to an image for augmented reality. For example, an image for augmented reality is displayed on a screen to emit augmented reality image light. It may be provided with a collimator (collimator) for collimating the image light to be a parallel light.

The reflection unit 30 provides an image for augmented reality by reflecting the image light corresponding to the image for augmented reality emitted from the image output unit 40 toward the pupil of the user.

The reflective part 30 of FIG. 1 is formed to have a size smaller than the size of a human pupil, that is, 8 mm or less. When the reflective part 30 is formed to be smaller than the pupil size as described above, The depth of the incident light can be made almost infinite, that is, the depth of field can be made very deep. Here, the depth of field refers to the range recognized as being in focus. As the depth of field increases, it means that the focal length of the image for augmented reality increases. Therefore, the user gazes at the real world. Even if the focal length for the world is changed, the focus of the image for augmented reality is always recognized as correct regardless of this. This can be seen as a kind of pin hole effect. Accordingly, it is possible to always provide a clear virtual image for an augmented reality image regardless of whether the user changes the focal length while gazing at a real object existing in the real world.

However, this technique requires an additional optical means such as a collimator for parallel light in the image output unit 40, so that the size, thickness, and volume of the device are increased.

In order to solve this problem, a method of performing the function of a collimator by embedding and arranging a reflective part such as a concave mirror inside the optical means 10 without using a collimator in the image output part 40 can be considered. According to the configuration, there is an advantage in that the size, thickness, and volume of the image output unit 40 can be reduced.

FIG. 2 is an augmented reality optical device 100 in which the augmented reality optical device 100 of FIG. 1 is provided with a collimator in the image output unit 40 and an auxiliary reflector 20 that performs the function of a collimator. This is a comparison of the side view of -1).

In the augmented reality optical device 100 of FIG. 1 shown on the left side of FIG. 2, the image output unit 40 is composed of a display device 41 and a collimator 42, and the augmented reality optics on the right side of FIG. It can be seen that the device 100-1 is configured with only the display device 41 without the image output unit 40 without the collimator 42.

The augmented reality optical device 100-1 on the right side of FIG. 2 does not use the collimator 42 for the image output unit 40, but is in the form of a concave mirror that can perform the function of a collimator inside the optical means 10. The auxiliary reflection unit 20 of the is disposed, and the augmented reality image light emitted from the image output unit 40 is reflected by the auxiliary reflection unit 20 and then transmitted to the reflection unit 30, and the reflection unit 30 ) Transmits the transmitted augmented reality image light to the pupil.

As such, the augmented reality optical device 100-1 as shown on the right side of FIG. 2 performs the same function as the augmented reality optical device 100 of FIG. Since the configuration is not used, there is an advantage in that form factors such as size, volume, thickness, and weight can be significantly reduced compared to the augmented reality optical device 100 using an external collimator as shown in the left side of FIG. 2.

However, the augmented reality optical device 100-1 as shown on the right side of FIG. 2 has a problem in that unintended real object image light that generates a ghost image can also be transmitted to the pupil.

3 is a diagram for explaining the principle of generating a ghost image in the augmented reality optical device 100-1.

Referring to FIG. 3, the actual object image light, which is the image light from the actual object, is directly transmitted to the pupil through the optical means 10, while there is a miscellaneous light reflected by the auxiliary reflector 20 and transmitted to the pupil. The actual object image light transmitted to the pupil by the miscellaneous light is formed in a different position from the actual object image light transmitted directly to the pupil through the optical means 10, thereby generating a ghost image.

Accordingly, there is a need for a technology capable of solving the ghost image problem that may occur in the augmented reality optical device 100-1 using the built-in collimator as shown in FIG. 2 using the auxiliary reflector 20 to reduce the form factor. .

Republic of Korea Patent Publication No. 10-1660519 (announced on September 29, 2016)

An object of the present invention is to provide an augmented reality optical device capable of remarkably reducing size, thickness, weight, and volume, and effectively blocking ghost images.

In addition, the present invention is an augmented reality that can provide a clear virtual image while maximizing see-through by minimizing the outflow of the real world image light that can generate a ghost image to the pupil of the user. Another object is to provide an optical device for use.

Another object of the present invention is to provide a device for providing augmented reality in the form of glasses that can be worn by a person without discomfort by significantly reducing the size, thickness, weight and volume while blocking the occurrence of ghost images. .

In order to solve the above problems, the present invention is an optical device for augmented reality having a ghost image blocking function, which transmits at least part of the image light of the real object, which is the image light emitted from the real object, toward the pupil of the user's eye. Way; A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image emitting unit to a second reflecting unit; And a second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye, The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye, and the The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit, and a first reflecting the augmented reality image light. A reflective surface of the reflective unit is disposed to face a direction in which the augmented reality image light is incident. It provides an optical device for augmented reality having a ghost image blocking function.

Here, the first reflective portion may be disposed inside the optical means so as to face the image output portion with the second reflective portion therebetween and face the first surface of the optical means.

In addition, the reflective surface of the first reflector may be formed as a curved surface.

In addition, the reflective surface of the first reflector may be formed to be concave toward a direction in which the augmented reality image light is incident.

In addition, it is preferable that the length of the first reflector in the width direction is 4 mm or less.

In addition, the first reflector may be formed as a half mirror that partially reflects light or a notch filter that selectively transmits light according to a wavelength.

In addition, the first reflector may be formed of a refractive element or a diffractive element.

In addition, a surface opposite to the surface that reflects the augmented reality image light of the first reflector may be coated with a material that absorbs light without reflecting it.

In addition, the second reflecting unit may be disposed to have an inclination angle with respect to the second surface of the optical means to reflect and transmit the augmented reality image light transmitted from the first reflecting unit toward the pupil.

In addition, the second reflector may be formed to have a size of 4 mm or less.

In addition, the size of the second reflector may be a maximum length between any two points on an edge boundary of the second reflector.

In addition, the size of the second reflector is the maximum length between any two points on the edge boundary of the orthogonal projection projecting the second reflector onto a plane including the center of the pupil while being perpendicular to a straight line between the user's pupil and the second reflector. Can be

In addition, the second reflecting unit may be formed in plural, and each of the second reflecting units may be disposed so that the augmented reality image light transmitted from the first reflecting unit is not blocked by another second reflecting unit.

Also, the sizes of the second reflectors may be partially different from each other.

In addition, a spacing of at least some of the second reflecting parts among the second reflecting parts may be different from that of other second reflecting parts.

In addition, at least some of the second reflectors may be formed as a half mirror that partially reflects light or a notch filter that selectively transmits light according to a wavelength.

In addition, at least some of the second reflectors may be formed of a refractive element or a diffractive element.

In addition, at least some of the second reflectors may be coated with a material that absorbs light without reflecting light on a surface opposite to a surface that reflects the augmented reality image light.

In addition, at least some of the second reflective portions may have a curved surface.

In addition, at least some of the second reflectors may have an inclination angle with respect to the optical means different from those of the other second reflectors.

According to another aspect of the present invention, a lens unit for transmitting at least a part of image light emitted from an actual object toward the pupil of the user's eye; And a frame part fixing the lens part, wherein the lens part is an augmented reality optical device having a ghost image blocking function as described above.

Here, a lens having refractive power for correcting vision may be disposed on at least one of the outside or inside of the lens unit.

In addition, all or part of the lens unit may be formed as a vision correction lens having refractive power for correcting vision.

According to the present invention, it is possible to provide an optical device for augmented reality that can significantly reduce the size, thickness, weight, and volume, and efficiently block ghost images.

In addition, the present invention is an augmented reality that can provide a clear virtual image while maximizing see-through by minimizing the outflow of the real world image light that can generate a ghost image to the pupil of the user. It is possible to provide an optical device for use.

In addition, the present invention can provide a device for providing augmented reality in the form of glasses that can be worn by a person without discomfort by significantly reducing the size, thickness, weight and volume while blocking the occurrence of ghost images.

1 is a diagram showing an optical device 100 for augmented reality as disclosed in Patent Document 1 above.
FIG. 2 is a view of the augmented reality optical device 100 of FIG. 1 including a collimator in the image output unit 30 and an augmented reality optical device 100-1 in which an auxiliary reflector performing the function of a collimator is disposed. It is shown by comparing the side view.
3 is a diagram for explaining the principle of generating a ghost image in the augmented reality optical device 100-1.
4 to 6 are views for explaining the configuration of an augmented reality optical device 200 having a ghost image blocking function according to an embodiment of the present invention, and FIG. 4 is a side view of the augmented reality optical device 200 5 is a front view of the augmented reality optical device 200 and FIG. 6 is a perspective view of the augmented reality optical device 200, respectively.
7 is a diagram for explaining a principle in which the first reflector 20 blocks a ghost image.
8 and 9 show an embodiment of an augmented reality providing device 300 implemented using the augmented reality optical device 200 according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 to 6 are diagrams for explaining the configuration of an augmented reality optical device 200 (hereinafter simply referred to as "augmented reality optical device 200") having a ghost image blocking function according to an embodiment of the present invention. 4 is a side view of the augmented reality optical device 200, FIG. 5 is a front view of the augmented reality optical device 200, and FIG. 6 is a perspective view of the augmented reality optical device 200.

4 to 6, the optical device 200 for augmented reality according to the present embodiment includes an optical means 10, a first reflecting unit 20, and a second reflecting unit 30.

The optical means 10 is a means for transmitting at least a part of the actual object image light, which is the image light emitted from the actual object, toward the pupil 50 of the user's eye.

Here, the fact that at least a part of the image light of the real object is transmitted toward the pupil 50 means that the light transmittance of the image light of the real object does not necessarily have to be 100%.

The optical means 10 includes a first surface 11 and a second surface 12 arranged to face each other. The first surface 11 is a surface on which the image light of an actual object is incident, and the second surface 12 is the augmented reality image light reflected from the second reflector 30 and the actual object passing through the first surface 11. This is the surface where the image light exits toward the pupil 50 of the user's eye.

The augmented reality image light emitted from the image output unit 40 is transmitted to the first reflecting unit 20 through the interior of the optical unit 10 or is totally reflected on the inner surface of the optical unit 10 so that the first reflecting unit 20 Can be delivered to.

4 to 6, the augmented reality image light emitted from the image output unit 40 is totally reflected on the inner surface (the first surface 11) of the optical means 10 and transmitted to the first reflection unit 20. It should be noted that this is a description of the total reflection structure.

When the total reflection structure is not used, that is, when the augmented reality image light emitted from the image output unit 40 is directly transmitted to the first reflection unit 20, the image output unit 40 is transferred to the first reflection unit 20 In consideration of the angle of ), it may be arranged at an appropriate position (eg, an appropriate position on an extension line of an arrow incident on the first reflective unit 20 outside the optical means 10 in FIG. 4 ).

When using a total reflection structure that is totally reflected on the inner surface of the optical means 10, as shown in Figs. 4 to 6, the augmented reality image light emitted from the image output unit 40 is the first surface of the optical unit 10 The augmented reality image light reflected from the first reflecting unit 20 and reflected from the first reflecting unit 20 is reflected from the second reflecting unit 30 and is reflected through the second surface 12. It exits into the pupil (50).

Here, the image emitting unit 40 is a means for emitting augmented reality image light. The image output unit 40, as described above, emits the augmented reality image light to the first reflection unit 20 or to the first surface 11 of the optical means 10, for example, a display such as a small LCD. It can be a device. Since the image output unit 40 itself is not a direct object of the present invention and is known by the prior art, a detailed description thereof will be omitted here. However, the image output unit 40 in the present embodiment does not include a configuration such as a collimator as described in the description of the background of the present invention.

Meanwhile, an image for augmented reality means a virtual image transmitted to the user's pupil 50 through the image output unit 40, the optical means 10, the first reflective unit 20, and the second reflective unit 30. It means an image, and may be a still image in the form of an image or a moving image.

The image for augmented reality is transmitted to the user's pupil 50 by the image output unit 40, the optical unit 10, the first reflection unit 20, and the second reflection unit 30, thereby providing a virtual image to the user. At the same time, the user can receive the augmented reality service by receiving the actual object image light emitted from the actual object existing in the real world through the optical means 10.

The first reflecting unit 20 is disposed inside the optical unit 10 and is a means for transmitting the augmented reality image light emitted from the image emitting unit 40 to the second reflecting unit 30.

As described above, the image output unit 40 emits augmented reality image light toward the first reflecting unit 20 or the first surface 11 of the optical means 10. In the case of using the total reflection structure, the augmented reality image light totally reflected from the first surface 11 of the optical means 10 is transmitted to the first reflecting unit 20, and the augmented reality reflected by the first reflecting unit 20 The image light is transmitted to the second reflecting unit 30, is reflected again by the second reflecting unit 30, and is emitted toward the pupil 50. In the case of not having a total reflection structure, the augmented reality image light emitted from the image output unit 40 is directly transmitted to the first reflecting unit 20, and the augmented reality image light reflected from the first reflecting unit 20 is a second reflecting unit. It is transmitted to (30), is reflected back from the second reflector (30), and emits toward the pupil (50).

The first reflection part 20 faces the image output part 40 with the second reflection part 30 interposed therebetween, and the optical means 10 faces the first surface 11 of the optical means 10. It is placed inside.

In addition, the first reflecting unit 20 reflects the image light corresponding to the augmented reality image toward the second reflecting unit 30 so that the first surface 11 and the second surface ( 12) It is placed inside between. That is, the first reflecting unit 20 may transmit the augmented reality image light reflected from the first surface 11 of the optical means 10 or the augmented reality image light emitted from the image output unit 40 to the second reflecting unit. It is disposed inside the optical means 10 between the first side 11 and the second side 12 so that it can be reflected and transmitted to 30.

In addition, the first reflecting unit 20 is inside the optical means 10 so that the reflective surface 21 of the first reflecting unit 20 that reflects the augmented reality image light faces the direction in which the augmented reality image light is incident. Is placed in In addition, the reflective surface 21 of the first reflecting portion 20 is disposed to face the first surface 11 of the optical means 10. With this configuration, the first reflecting unit 20 may perform a function of filtering out miscellaneous light that generates a ghost image from the real object image light emitted from the real object without being transmitted to the second reflecting unit 30.

Meanwhile, the reflective surface 21 of the first reflective part 20 may be formed in a curved surface. For example, the reflective surface 21 of the first reflector 20 may be a concave mirror formed concave toward the first surface 11 of the optical means 10, which is a direction in which the augmented reality image light is incident. 1 The reflective unit 20 can serve as a collimator for collimating the augmented reality image light emitted from the image output unit 40, and therefore, it is necessary to use the same configuration as the collimator for the image output unit 40. Means there is no.

7 is a diagram for explaining a principle in which the first reflector 20 blocks a ghost image.

As shown in FIG. 7, the real object image light (miscellaneous light) that is emitted from an actual object and can generate a ghost image is incident on the first reflecting unit 20, and as described above, the first reflecting unit 20 Is arranged to face the first surface 11, which is the direction in which the augmented reality image light is incident, so that the actual object image light (miscellaneous light) reflected from the reflective surface 21 of the first reflector 20 is optical means ( It can be seen that the light is emitted toward the second surface 12 of 10), is totally reflected again on the second surface 12 of the optical means 10, and transmitted toward the image exit unit 40. Accordingly, it can be seen that the real object image light, which is a miscellaneous light emitted from an actual object and capable of generating a ghost image, disappears inside the optical means 10 and does not flow out toward the pupil 50.

However, this principle explains the basic principle for preventing the actual object image light (miscellaneous light) reflected from the first reflector 20 from leaking out of the optical means 10, and in reality, the shape of the optical means 10 Considering the refractive index, the position of the eye and the first reflector 20, the size of the pupil, and eye relief, it is possible to minimize external light (miscellaneous light) reflected by the first reflector 20 and entering the pupil. The position and direction of the first reflector 20 must be properly adjusted so that it is possible.

Meanwhile, as will be described later, the size of the second reflector 30 is formed to be 8 mm or less, more preferably 4 mm or less, which is the size of a general pupil of a person. The length in the width direction is preferably 8 mm or less, more preferably 4 mm or less, so as to correspond to the size of the second reflector 30.

Here, the width direction of the first reflector 20 means a direction between the first surface 11 and the second surface 12 of the optical means 10 in FIGS. 4 to 6.

In addition, it is preferable to make the thickness of the first reflective part 20 very thin when viewed from the front in order that the user can hardly recognize the first reflective part 20 through the pupil 50 as possible.

In addition, the first reflector 20 may be configured by means such as a half mirror that partially reflects light.

In addition, the first reflecting portion 20 may be formed of a refractive element or diffractive element other than reflecting means.

In addition, the first reflector 20 may be formed of an optical element such as a notch filter that selectively transmits light according to a wavelength.

In addition, the opposite surface of the surface of the first reflector 20 that reflects the augmented reality image light may be coated with a material that absorbs light without reflecting it.

The second reflector 30 will be described again with reference to FIGS. 4 to 6.

The second reflector 30 is disposed inside the optical means 10, and reflects the augmented reality image light transmitted from the first reflector 20 toward the pupil 50 of the user's eyes and transmits the It is a means of providing an image for augmented reality to a user.

The second reflector 30 reflects the augmented reality image light transmitted from the first reflector 20 toward the pupil 50 and transmits it at an inclination angle with respect to the second surface 12 of the optical means 10. Is placed with.

The second reflector 30 has a size smaller than the size of a human pupil, that is, 8 mm or less, and more preferably 4 mm or less, so as to obtain a pinhole effect by deepening the depth as described in the technology behind the background of the invention. Is formed.

That is, the second reflecting unit 30 is formed to have a size smaller than the size of a general pupil of a person, whereby the depth of field for light incident to the pupil 50 through the second reflecting unit 30 The pinhole effect that allows the user to change the focal length to the real world while gazing at the real world as close to infinity, that is, a very deep depth of field, to recognize that the focus of the image for augmented reality is always correct, regardless of this. (pin hole effect) may occur.

Here, the size of the second reflecting unit 30 is defined to mean the maximum length between any two points on the edge boundary line of the second reflecting unit 30.

In addition, the size of the second reflector 30 is perpendicular to the straight line between the pupil 50 and the second reflector 30 and the second reflector 30 is placed on a plane including the center of the pupil 50. It may be the maximum length between any two points on the edge boundary of the projected orthographic projection.

Meanwhile, the second reflective unit 30 may be formed in plural. In this case, each of the second reflecting units 30 is transmitted from the first reflecting unit 20 as shown in FIGS. 5 and 6. It is arranged so that image light corresponding to the image for augmented reality is not blocked by the other second reflecting unit 30.

Even in this case, the size of each of the second reflectors 30 is 8 mm or less, more preferably 4 mm or less.

In addition, the sizes of the second reflectors 30 do not all have to be the same, and may be partially different from each other.

In addition, although it is preferable that each of the second reflecting units 30 are disposed at the same distance, the spacing of at least some of the second reflecting units 30 may be different from that of the other second reflecting units 30. have.

In addition, at least some of the second reflectors 30 may be configured by means such as a half mirror that partially reflects light.

In addition, at least some of the second reflecting portions 30 may be formed of other refractive elements or diffractive elements other than reflecting means.

In addition, at least some of the second reflectors 30 may be formed of an optical element such as a notch filter that selectively transmits light according to a wavelength.

Also, for at least some of the second reflectors 30, a surface opposite to the surface that reflects the augmented reality image light may be coated with a material that absorbs light without reflecting it.

In addition, at least some of the second reflective portions 30 may have a curved surface. Here, the curved surface may be a concave surface or a convex surface.

In addition, an inclination angle of at least some of the second reflecting units 30 with respect to the optical means 10 may be formed differently from that of the other second reflecting units 30.

8 and 9 show an embodiment of the apparatus 300 for providing augmented reality in the form of glasses implemented using the optical device 200 for augmented reality according to the present invention described above.

As shown in FIGS. 8 and 9, the augmented reality providing apparatus 300 is generally formed in the form of glasses including a lens unit 310 and a frame unit 320 fixing the lens unit 310, It is characterized in that the lens unit 310 is implemented with the optical device 200 for augmented reality as described above.

In this case, the lens unit 310 corresponds to the optical means 10 of the augmented reality optical device 200 as described above, and the first reflecting unit 20 and the second reflecting unit inside the lens unit 310 30 are arranged in the same manner as described above.

The frame unit 320 may be configured in a conventionally known form of glasses surrounding the lens unit 310, and the image output unit 40 is disposed at an appropriate position of the frame unit 320 as described above. Can be. In this case, for example, at the end of the leg portion 321 of the frame portion 320 that enables the user to wear the augmented reality providing device 300 over the ear, a connection port for connecting a smart phone or a computer in a wired or wireless manner is provided. And transmits the image or video data corresponding to the image for augmented reality to the image output unit 40 through the connection port and the cable formed inside the frame unit 320, and the image output unit 40 transmits the image for the augmented reality It is possible to emit image light corresponding to.

As described above, according to the optical device 200 for augmented reality according to the present invention, the overall size, thickness, and volume of the device can be significantly reduced while minimizing the occurrence of ghost images, the augmented reality providing device 300 also You can have these advantages as it is. Accordingly, it is possible to provide an augmented reality providing apparatus 300 that does not require a complicated configuration and has excellent fit compared to the prior art.

Meanwhile, in the augmented reality providing apparatus 300 as shown in FIGS. 8 and 9, for a user having a refractive error, a vision correction lens having a predetermined refractive power is provided at least one of the outside or inside of the lens unit 310. It may be disposed on one side, or all or part of the lens unit 310 (optical means 10) itself may be formed as a vision correction lens having a predetermined refractive power. According to this configuration, there is an advantage of additionally providing a vision correction effect according to the user's vision.

In the above, the present invention has been described with reference to a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and other various modifications and variations are possible.

For example, as described above, in the embodiments of Figs. 4 to 6, the case of using the total reflection structure has been described with reference to the drawings, but by appropriately arranging the image output unit 40, the augmented reality image light is transmitted to the image output unit ( It goes without saying that it is also possible to be transmitted from 40) to the first reflector 20 without total reflection.

100...conventional augmented reality optics
200...augmented reality optics with ghost image blocking
10...optical means
11...the first side of the optical means (10)
12... second side of optical means (10)
20...first reflector
21...reflective surface of the first reflective part 20
30...second reflector
300... devices that provide augmented reality
310...Lens unit
320... frame part
321...Leg
40...image display
50... pupil

Claims (22)

As an augmented reality optical device having a ghost image blocking function,
Optical means for transmitting at least a part of the image light of the real object, which is the image light emitted from the real object, toward the pupil of the user's eye;
A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image emitting unit to a second reflecting unit; And
A second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye.
Including,
The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye,
The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit,
The augmented reality optical device having a ghost image blocking function, characterized in that the reflective surface of the first reflecting unit that reflects the augmented reality image light is disposed to face a direction in which the augmented reality image light is incident. The method according to claim 1,
The optical device for augmented reality having a ghost image blocking function, characterized in that the reflective surface of the first reflector is formed in a curved surface. The method according to claim 2,
The reflective surface of the first reflecting unit is formed to be concave toward a direction in which the augmented reality image light is incident. The optical device for augmented reality having a ghost image blocking function. The method according to claim 1,
The optical device for augmented reality having a ghost image blocking function, characterized in that the length in the width direction of the first reflector is 4 mm or less. The method according to claim 1,
The first reflecting part is a half mirror that partially reflects light or a notch filter that selectively transmits light according to a wavelength. The method according to claim 1,
The optical device for augmented reality having a ghost image blocking function, wherein the first reflecting unit is formed of a refractive element or a diffractive element. The method according to claim 1,
An augmented reality optical device having a ghost image blocking function, characterized in that the opposite surface of the surface that reflects the augmented reality image light of the first reflector is coated with a material that absorbs light without reflecting light. The method according to claim 1,
The second reflecting unit has a ghost image blocking function, characterized in that it is disposed to have an inclination angle with respect to the second surface of the optical means so that the augmented reality image light transmitted from the first reflecting unit can be reflected and transmitted toward the pupil. Having an optical device for augmented reality. The method of claim 8,
The second reflective unit is an augmented reality optical device having a ghost image blocking function, characterized in that formed in a size of 4 mm or less. The method of claim 9,
The size of the second reflector is a maximum length between any two points on an edge boundary of the second reflector. The optical device for augmented reality with a ghost image blocking function. The method of claim 9,
The size of the second reflector is the maximum length between any two points on the edge boundary of the orthogonal projection projecting the second reflector onto a plane including the center of the pupil while being perpendicular to a straight line between the user's pupil and the second reflector. Optical device for augmented reality having a ghost image blocking function, characterized in that. The method of claim 9,
A ghost image blocking function, characterized in that the second reflecting unit is formed in a plurality, and each second reflecting unit is disposed so that the augmented reality image light transmitted from the first reflecting unit is not blocked by another second reflecting unit. Optical device for augmented reality having a. The method of claim 12,
The optical device for augmented reality having a ghost image blocking function, characterized in that the sizes of the second reflectors are partially different from each other. The method of claim 12,
An optical device for augmented reality having a ghost image blocking function, characterized in that a spacing of at least some of the second reflecting parts among the second reflecting parts is arranged differently from the spacing of the other second reflecting parts. The method of claim 12,
At least some of the second reflecting units are half mirrors that partially reflect light or a notch filter that selectively transmits light according to a wavelength. The method of claim 12,
An optical device for augmented reality having a ghost image blocking function, characterized in that at least some of the second reflectors are formed of a refractive element or a diffractive element. The method of claim 12,
An optical device for augmented reality having a ghost image blocking function, characterized in that for at least some of the second reflectors, a surface opposite to a surface that reflects the augmented reality image light is coated with a material that absorbs light without reflecting light. The method of claim 12,
An optical device for augmented reality having a ghost image blocking function, characterized in that at least some of the surfaces of the second reflectors are formed in a curved shape. The method of claim 12,
An optical device for augmented reality having a ghost image blocking function, characterized in that at least some of the second reflecting parts have an inclination angle with respect to the optical means different from that of the other second reflecting parts. A lens unit that transmits at least a portion of the image light emitted from an actual object toward the pupil of the user's eye; And as a glasses-type augmented reality providing apparatus including a frame portion fixing the lens unit,
The apparatus for providing augmented reality, wherein the lens unit is an augmented reality optical device having a ghost image blocking function according to any one of claims 1 to 19. The method of claim 20,
An augmented reality providing apparatus, characterized in that a lens having refractive power for correcting vision is disposed on at least one of the outside or the inside of the lens unit. The method of claim 20,
The apparatus for providing augmented reality, wherein all or a part of the lens unit is formed of a vision correction lens having refractive power for correcting vision.

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