WO2023200123A1 - Dispositif optique pour réalité augmentée ayant une région oculaire étendue - Google Patents

Dispositif optique pour réalité augmentée ayant une région oculaire étendue Download PDF

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Publication number
WO2023200123A1
WO2023200123A1 PCT/KR2023/003412 KR2023003412W WO2023200123A1 WO 2023200123 A1 WO2023200123 A1 WO 2023200123A1 KR 2023003412 W KR2023003412 W KR 2023003412W WO 2023200123 A1 WO2023200123 A1 WO 2023200123A1
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Prior art keywords
optical
augmented reality
optical device
pupil
optical elements
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PCT/KR2023/003412
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English (en)
Korean (ko)
Inventor
하정훈
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주식회사 레티널
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Publication of WO2023200123A1 publication Critical patent/WO2023200123A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/015—Head-up displays characterised by mechanical features involving arrangement aiming to get less bulky devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G02B2027/0174—Head mounted characterised by optical features holographic

Definitions

  • the present invention relates to an optical device for augmented reality, and more specifically, to an optical device for augmented reality having an expanded eye box compared to the prior art.
  • Augmented Reality refers to virtual image information augmented from visual information in the real world by providing virtual images provided by computers, etc., over real images in the real world. It refers to the technology provided to users.
  • a device for implementing such augmented reality requires an optical combiner that allows virtual images to be observed simultaneously with actual images in the real world.
  • optical synthesizers the half mirror method and the holographic/diffractive optical elements (HOE/DOE) method are known.
  • the semi-mirror method has problems in that the transmittance of the virtual image is low and that it is difficult to provide a comfortable fit because the volume and weight are increased to provide a wide viewing angle.
  • technologies such as LOE (Light guide Optical Element), which places a plurality of small semi-mirrors inside a waveguide, have been proposed, but these technologies also require that the image light of the virtual image travels through the semi-mirrors inside the waveguide.
  • LOE Light guide Optical Element
  • the holographic/diffractive optical device method generally uses nanostructured grids or diffraction gratings, but since these are manufactured through very precise processes, they have limitations in that the manufacturing cost is high and the yield for mass production is low. Additionally, it has limitations in terms of color uniformity and low image clarity due to differences in diffraction efficiency depending on the wavelength band and angle of incidence. Holographic/diffractive optical elements are often used in conjunction with waveguides such as the LOE described above, and therefore still suffer from the same problems.
  • conventional optical synthesizers have a limitation in that the virtual image becomes out of focus when the user changes the focal distance while gazing at the real world.
  • a technology has been proposed that uses a prism that can adjust the focal length of the virtual image or a variable focus lens that can electrically control the focal length.
  • this technology also has problems in that the user must perform separate operations to adjust the focal distance and also requires separate hardware/software for controlling the focal distance.
  • FIG. 1 is a diagram showing an optical device 100 for augmented reality as described in Prior Art Document 1.
  • the optical device 100 for augmented reality in FIG. 1 includes a second optical means 10 and a reflection unit 20.
  • the image emitting unit 30 is a means for emitting virtual image image light, for example, a micro display device that displays a virtual image on a screen and emits virtual image image light corresponding to the displayed virtual image, and image light emitted from the micro display device.
  • a collimator may be provided to collimate the light with parallel light.
  • the second optical means 10 transmits real object image light, which is image light emitted from objects in the real world, into the pupil 40, while emitting virtual image image light reflected from the reflector 20 into the pupil 40. It is a means of performing a function.
  • the second optical means 10 may be formed of a transparent resin material, such as a spectacle lens, and may be fixed by a frame (not shown) such as an eyeglass frame.
  • the reflector 20 reflects the virtual image light emitted from the image emitter 30 and transmits it toward the user's pupil 40.
  • the reflector 20 is embedded and disposed inside the second optical means 10.
  • the reflection portion 20 in FIG. 1 is formed in a size smaller than the human pupil. It is known that the general size of a human pupil is about 4 to 8 mm, so the reflection portion 20 is preferably formed to be 8 mm or less, and more preferably 4 mm or less.
  • the depth of field for light incident on the pupil 40 through the reflector 20 can be made close to infinity, that is, very deep.
  • depth refers to the range recognized as being in focus.
  • the range of focal distance for the virtual image correspondingly widens. Therefore, even if the user changes the focal distance to the real world while gazing at the real world, the virtual image is always recognized as being in focus regardless. This can be seen as a kind of pinhole effect.
  • FIGS. 2 to 4 are diagrams showing the optical device 200 for augmented reality as disclosed in prior art document 2, where FIG. 2 is a side view, FIG. 3 is a perspective view, and FIG. 4 is a front view.
  • the optical device 200 for augmented reality of FIGS. 2 to 4 has the same basic principle as the optical device 100 for augmented reality of FIG. 1, but the reflector 20 has a plurality of reflections to widen the viewing angle and eye box. It is composed of modules and disposed inside the second optical means 10 in the form of an array, and the virtual image image light emitted from the image emitting unit 30 is totally reflected and reflected inside the second optical means 10. The difference is that it is transmitted as part (20).
  • reference numerals 21 to 26 indicate only reflection modules seen from the side as in FIG. 2 , and the reflection unit 20 refers to the entire plurality of reflection modules.
  • each of the plurality of reflection modules is preferably formed to have a size of 8 mm or less, and more preferably 4 mm or less.
  • the virtual image light emitted from the image emitting unit 30 is totally reflected on the inner surface of the second optical means 10 and then transmitted to the reflection modules, and the reflection modules reflect the incident virtual image light. is reflected and transmitted to the pupil (40).
  • the reflection modules must be arranged to have an appropriate inclination angle inside the second optical means 10 as shown, taking into account the positions of the image emitting unit 30 and the pupil 40.
  • This optical device 200 for augmented reality has the advantage of being able to widen the eye box compared to the optical device 100 for augmented reality in FIG. 1 .
  • the eye box in the horizontal axis direction is determined by the length of the collimator included in the image emitter 30,
  • the eyebox in the vertical axis direction (y-axis direction) is determined by the arrangement structure of the reflectors 21 to 26.
  • Patent Document 1 Republic of Korea Patent Publication No. 10-2018-0028339 (published on March 16, 2018)
  • Patent Document 2 Republic of Korea Patent Publication No. 10-2192942 (announced on December 18, 2020)
  • the present invention aims to provide an optical device for augmented reality with an expanded eyebox.
  • the present invention aims to provide an optical device for augmented reality that can significantly expand the eyebox of the optical device for augmented reality while maintaining the form factor.
  • the present invention provides an optical device for augmented reality having an expanded eyebox, comprising: first optical means through which virtual image light emitted from an image emitting unit travels; a plurality of first optical elements embedded in the first optical means and emitting virtual image light traveling through the first optical means to the second optical means; a second optical means that transmits real object image light to the pupil of the user's eye, and allows virtual image image light emitted from the first optical element to travel through its interior; and a second optical element embedded in the second optical means and providing a virtual image to the user by transmitting virtual image light traveling through the second optical means to the pupil of the user's eye,
  • the plurality of first optical elements are arranged at intervals in a first direction within the first optical means, and the plurality of second optical elements are arranged at intervals in a second direction perpendicular to the first direction.
  • the virtual plane formed by the first direction and the second direction is a two-dimensional plane that can be observed from the user's pupil when the augmented reality optical device is placed in front of
  • the first direction may be a direction corresponding to any one of line segments included in a plane perpendicular to a straight line in the front direction from the pupil when the augmented reality optical device is placed in front of the pupil.
  • the second direction may be a direction perpendicular to the first direction among line segments included in a plane perpendicular to a straight line in the frontal direction from the pupil.
  • an image emitting unit may be disposed at one end of the first optical means in the first direction.
  • the image emitting unit may include a display unit that displays a virtual image and a collimator that collimates the virtual image image light emitted from the display unit and emits it as parallel light.
  • the virtual image light emitted from the image emitting unit may be totally reflected inside the first optical means and transmitted to the first optical element.
  • the plurality of first optical elements may be arranged to be inclined within the first optical means so that virtual image light traveling through the first optical means can be emitted and transmitted to the second optical means.
  • the plurality of first optical elements may have an inclination angle with respect to the first direction when viewed with the augmented reality optical device in front of the pupil and at the same time have an inclination angle with respect to the second direction when viewed from the side. It may be placed inside the optical means.
  • the length of each of the plurality of first optical elements in the width direction may be formed to correspond to the length of the image emitting unit in the width direction.
  • the plurality of first optical elements may be reflection means that reflect incident light.
  • the plurality of first optical elements may be half mirrors that transmit part of the incident light and reflect part of the incident light.
  • the plurality of first optical elements may be any one of a refractive element, a diffractive element, and a holographic optical element, or may be configured by a combination thereof.
  • the plurality of second optical elements may be formed in a bar shape extending in the first direction.
  • each of the plurality of second optical elements may be arranged to be inclined inside the second optical means so as to transmit virtual image light traveling through the inside of the second optical means to the pupil.
  • the plurality of second optical elements have an inclination angle inside the second optical means such that the virtual image light emitted from the first optical element and transmitted through total reflection on the second surface of the second optical means can be transmitted to the pupil. It can be placed with .
  • the plurality of second optical elements may have a height of 4 mm or less when viewed from the front.
  • the plurality of second optical elements may be reflection means that reflect incident light.
  • the plurality of second optical elements may be half mirrors that transmit part of the incident light and reflect part of it.
  • the plurality of second optical elements may be any one of a refractive element, a diffractive element, and a holographic optical element, or may be configured by a combination thereof.
  • each of the plurality of second optical elements may be composed of a plurality of optical modules with a size of 4 mm or less.
  • the plurality of optical modules may be arranged in an array form and spaced apart from each other in a virtual plane formed by a first direction and a second direction when the optical device for augmented reality is viewed from the front.
  • each of the plurality of first optical elements may be composed of a plurality of optical modules with a size of 4 mm or less.
  • the plurality of optical modules may be arranged in an array form and spaced apart from each other in a virtual plane perpendicular to the first direction when the optical device for augmented reality is viewed from the side.
  • first optical means and the second optical means may be formed integrally.
  • the eye box in an optical device for augmented reality can be expanded.
  • the present invention can provide an optical device for augmented reality that can significantly expand the eyebox of the optical device for augmented reality while maintaining the form factor, and thus provides an optical device for augmented reality suitable for compactness and weight reduction. You can.
  • FIG. 1 is a diagram showing an optical device 100 for augmented reality as described in Prior Art Document 1.
  • FIGS. 2 to 4 are diagrams showing the optical device 200 for augmented reality as disclosed in prior art document 2, where FIG. 2 is a side view, FIG. 3 is a perspective view, and FIG. 4 is a front view.
  • FIGS. 5 to 7 are diagrams for explaining an optical device 300 for augmented reality with an expanded eye box according to an embodiment of the present invention.
  • FIG. 5 is a perspective view
  • FIG. 6 is a front view
  • FIG. 7 is a perspective view. This is a side view.
  • FIG. 8 is a diagram for explaining the arrangement structure of the first optical element 60.
  • FIG. 9 is a diagram for explaining the arrangement structure of the second optical element 20.
  • FIG. 10 is a diagram for explaining the eye box in the first direction (x-axis direction) in the conventional optical device 200 of FIGS. 2 to 4, where the optical device 200 is placed in front of the pupil 40. This is the front view.
  • FIG. 11 is a diagram for explaining the eye box in the first direction in the optical device 300 of FIGS. 5 to 7.
  • the optical device 300 is placed in front of the pupil 40, and the pupil 40 displays the eye box of FIG. 7. This is a drawing when looking in direction A.
  • FIGS. 12 to 14 are diagrams for explaining an optical device 400 according to another embodiment of the present invention.
  • FIG. 12 is a perspective view
  • FIG. 13 is a front view
  • FIG. 14 is a side view.
  • FIGS. 15 to 17 are diagrams for explaining an optical device 500 according to another embodiment of the present invention.
  • FIG. 15 is a perspective view
  • FIG. 16 is a front view
  • FIG. 17 is a side view.
  • FIGS. 5 to 7 are diagrams for explaining an optical device 300 for augmented reality with an expanded eye box according to an embodiment of the present invention.
  • FIG. 5 is a perspective view
  • FIG. 6 is a front view
  • FIG. 7 is a perspective view. This is a side view.
  • the image emitting unit 30 is shown as transparent for convenience of explanation.
  • the optical device 300 for augmented reality (hereinafter simply referred to as “optical device 300”) having an expanded eyebox includes a first optical means 50, a first optical element ( 60), and includes a second optical means 10 and a second optical element 20.
  • the first optical means 50 is a means through which the virtual image light emitted from the image emitting unit 30 travels through its interior.
  • first optical elements 60 are arranged at intervals in the first direction, as will be described later.
  • the first direction may be a direction corresponding to any one of the line segments included in the plane perpendicular to the straight line in the front direction from the pupil 40 when the optical device 300 is placed in front of the pupil 40.
  • the first direction corresponds to the x-axis direction.
  • the first optical means 50 may have a rectangular parallelepiped shape extending in a first direction, that is, the x-axis direction, and may be formed of a transparent resin material or glass material.
  • An image emitting unit 30 is disposed at one end of the first optical means 50 in the first direction.
  • the image emitting unit 30 is a means for emitting virtual image light, which is image light corresponding to a virtual image.
  • the virtual image refers to an augmented reality image provided to the user and may be an image or video.
  • the image emitting unit 30 includes a display unit that displays conventionally known virtual images such as small LCD, OLED, LCoS, and micro LED, and a collimator ( collimator). Accordingly, the virtual image light emitted from the image emitting unit 30 to the first optical means 50 is collimated parallel light.
  • a display unit that displays conventionally known virtual images such as small LCD, OLED, LCoS, and micro LED
  • a collimator collimator
  • the virtual image light may be emitted from the image emitter 30, be totally reflected inside the first optical means 50, and be transmitted to the first optical element 60. 5 to 7, the virtual image light is totally reflected at the upper surface 51 of the first optical means 50 and transmitted to the first optical element 60.
  • the surface of the image emitting unit 30 is disposed inclined so as to face the upper surface 51 of the first optical means 50, and one end of the first optical means 50 on which the image emitting unit 30 is disposed is also It may be formed to be inclined to correspond to the inclination angle of the image emitting unit 30.
  • the virtual image image light emitted from the image emitter 30 is transmitted to the plurality of first optical elements 60 without total reflection, or is transmitted to the first optical elements 60 through two or more total reflections. It can be delivered.
  • the shape and inclination angle of the image emitting unit 30 and the first optical means 50 may have different shapes and arrangement structures.
  • the plurality of first optical elements 60 are embedded inside the first optical means 50 and direct virtual image light traveling through the inside of the first optical means 50 to the second optical means 10. It is a means of getting out.
  • the plurality of first optical elements 60 are arranged at intervals in the first direction within the first optical means 50 .
  • “arranged at intervals in the first direction” means that it is sufficient for the plurality of first optical elements 60 to be arranged at intervals from each other in the first direction, and must be parallel to the first direction. It is important to note that they do not have to be arranged side by side along a straight line.
  • FIG. 8 is a diagram for explaining the arrangement structure of the first optical element 60.
  • FIG. 8 is a front view of the optical device 300 viewed from the front of the pupil 40, showing only the first direction and the first optical element 60.
  • the plurality of first optical elements 60 are aligned side by side along a straight line parallel to the first direction (x-axis direction) when looking at the optical device 300 from the front. and can be placed.
  • the plurality of first optical elements 60 are aligned and arranged side by side along a straight line having an inclination angle with respect to the first direction when looking at the optical device 300 from the front. It can be.
  • the center of the plurality of first optical elements 60 is located on a gentle “C” shaped curve when looking at the optical device 300 from the front. It may be arranged to do so. This is the same as shown in FIG. 6.
  • first optical elements 60 among the plurality of first optical elements 60 may have this arrangement structure.
  • the image emitting unit 30, the second optical means 10, the second optical element 20, and the pupil 40 may be arranged differently depending on various conditions such as relative positional relationship, inclination angle, and total reflection. Of course it exists.
  • the spacing of the plurality of first optical elements 60 may all be the same, but of course, the spacing of at least some of them may be different.
  • the plurality of first optical elements 60 are arranged to emit and transmit virtual image light traveling through the first optical means 50 to the second optical means 10.
  • the plurality of first optical elements 60 may be arranged to be inclined within the first optical means 50 considering the positions of the image emitting unit 30 and the second optical means 10.
  • the virtual image image light emitted from the image emitting unit 30 is totally reflected at the upper surface 51 of the first optical means 50 and transmitted to the plurality of first optical elements 60. do.
  • the virtual image light emitted from the first optical element 60 will be totally reflected on the second surface 12 of the second optical means 10 and then transmitted to the second optical element 20. You can.
  • the plurality of first optical elements 60 have an inclination angle with respect to the first direction when the optical device 300 is viewed from the front of the pupil 40, and at the same time, when viewed from the side, the plurality of first optical elements 60 have an inclination angle with respect to the first direction. It may be disposed inside the first optical means 50 so as to have an inclination angle with respect to two directions.
  • the second direction is a direction perpendicular to the first direction, as will be described later, and the virtual plane formed by the first direction and the second direction moves the augmented reality optical device 300 to the user's pupil 40.
  • the direction is such that it becomes a two-dimensional plane observed from the user's pupil 40.
  • the upper surface 13 of the second optical means 10 is formed to be inclined when viewed from the side, and the first optical means 50 is disposed on the upper surface 13 of the second optical means 10 to provide the first optical means 10.
  • the optical elements 60 may be arranged to be inclined with respect to the second direction.
  • each of the plurality of first optical elements 60 is configured as shown in (b) of FIG. 8 so as not to block the virtual image light emitted from the image emitting unit 30 and transmitted to the other first optical elements 60. ) or (c), it may be arranged so that the farther away it is from the image emitting unit 30, the closer it is to the upper surface 51 of the first optical means 50.
  • the plurality of first optical elements 60 may be formed, for example, in a rectangular shape, and the length of each in the width direction is preferably formed to correspond to the length of the image emitting unit 30 in the width direction.
  • the plurality of first optical elements 60 are preferably reflective means that reflect incident light.
  • the reflectance of the plurality of first optical elements 60 is preferably 100% or a high value close to it, such as a full mirror made of metal, but a half mirror that transmits part of the incident light and reflects part of the incident light. It may also be a half mirror.
  • the plurality of first optical elements 60 may be any one of a refractive element, a diffractive element, and a holographic optical element, or may be configured by a combination thereof.
  • the second optical means 10 is a means for transmitting real object image light emitted from real objects existing in the real world to the pupil 40 of the user's eye. Additionally, the second optical means 10 allows virtual image light emitted from the first optical element 60 to travel through its interior.
  • the second optical means 10 may also be made of transparent resin or glass.
  • the second optical means 10 has a first surface 11 through which virtual image image light and real object image light are emitted toward the user's pupil 40, and the second optical means 10 faces the first surface 11 and provides real object image light. It has a second surface 12 on which the incident occurs and a third surface 13 on which the first optical means 50 is disposed.
  • the virtual image light transmitted through the image emitting unit 30 and the first optical means 50 is transmitted to the pupil 40 through the first surface 11 of the second optical means 10, and the actual object image is transmitted to the pupil 40. Since the light passes through the second surface 12 and the first surface 11 of the second optical means 10 and is transmitted to the pupil 40, the user receives virtual image light and real object image light simultaneously. and, thereby, augmented reality services can be provided.
  • the plurality of second optical elements 20 are embedded inside the second optical means 10 and direct the virtual image light traveling through the inside of the second optical means 10 into the pupil 40 of the user's eye. It is a means of providing virtual images to users by transmitting them.
  • the plurality of second optical elements 20 are arranged at intervals in the second direction.
  • the second direction is a direction perpendicular to the first direction, and the virtual plane formed by the first direction and the second direction places the augmented reality optical device 300 in front of the user's pupil 40. It is a two-dimensional plane that can be observed from the user's pupil 40.
  • the first direction is a direction corresponding to any one of the line segments included in the plane perpendicular to the straight line in the front direction from the pupil 40 when the optical device 300 is placed in front of the pupil 40. It may be, and in this case, the second direction corresponds to a direction perpendicular to the first direction among the line segments included in the plane perpendicular to the straight line in the frontal direction in the pupil 40.
  • the first direction is the x-axis direction
  • the second direction is the y-axis direction perpendicular to the am.
  • the virtual plane formed by the first direction (x-axis direction) and the second direction (y-axis direction) is a two-dimensional x-y plane perpendicular to the z-axis.
  • this two-dimensional plane does not necessarily have to be perpendicular to the z-axis, and may be slightly rotated around the x-axis or y-axis as long as it can be observed from the user's pupil 40.
  • the meaning that the plurality of second optical elements 20 are “arranged at intervals in the second direction” means that, as previously described with respect to the first optical element 60, the plurality of second optical elements 20 are arranged at intervals in the second direction. It should be noted that this means that it is sufficient to just place them at intervals from each other in the two directions, and this does not mean that they must be arranged side by side on a straight line parallel to the second direction.
  • FIG. 9 is a diagram for explaining the arrangement structure of the second optical element 20.
  • the plurality of second optical elements 20 may be aligned and arranged side by side along a straight line parallel to the second direction when viewed from the side.
  • the plurality of second optical elements 20 may be aligned and arranged side by side along a straight line having an inclination angle with respect to the second direction when viewed from the side.
  • the plurality of second optical elements 20 may be arranged so that their centers are located on a gentle “C”-shaped curve when viewed from the side. This is the same as shown in FIG. 7.
  • first optical elements 20 among the plurality of second optical elements 20 may have this arrangement structure.
  • the relative positional relationship, tilt angle, total reflection, etc. of the image emitting unit 30, the first optical means 50, the first optical element 60, the second optical means 10, and the pupil 40 Of course, it can be arranged differently depending on various conditions.
  • the spacing of the plurality of second optical elements 60 may all be the same, but of course, the spacing of at least some of the plurality of second optical elements 60 may be different.
  • the plurality of second optical elements 20 may have a bar shape extending in the first direction, that is, the x-axis direction.
  • each of the plurality of second optical elements 20 is inclined inside the second optical means 10 so as to transmit the virtual image light traveling through the inside of the second optical means 10 to the pupil 40. can be placed.
  • the plurality of second optical elements 20 have an appropriate inclination angle in consideration of the relative positions of the first optical means 50, the first optical element 60, and the pupil 40, and the second optical means 10 ) can be placed inside.
  • each of the plurality of second optical elements 20 is arranged to have an appropriate inclination angle inside the second optical means 10 in consideration of the optical path.
  • each of the plurality of second optical elements 20 is configured as shown in FIG. 9 so as not to block the virtual image light emitted from the first optical elements 60 and transmitted to the other second optical elements 20. As shown in (b) or (c), the further away from the first optical element 60, the closer to the second surface 12 of the second optical means 10.
  • the plurality of second optical elements 20 are formed to have a height smaller than the average human pupil size, that is, 8 mm or less when viewed from the front, and preferably 4 mm or less. is formed by
  • the height is too small, the diffraction phenomenon increases, so it is preferable to set it larger than 0.3 mm, for example.
  • the plurality of second optical elements 20 are reflection means that reflect incident light.
  • the plurality of second optical elements 20 may be any one of a refractive element, a diffractive element, and a holographic optical element, or may be configured by a combination thereof.
  • FIG. 10 is a diagram for explaining the eye box in the first direction (x-axis direction) in the conventional optical device 200 of FIGS. 2 to 4, where the optical device 200 is placed in front of the pupil 40. This is the front view.
  • the virtual image image light emitted from one point of the display unit 31 is collimated into a plurality of parallel lights by the collimator 32 and transmitted to the second optical means ( 10), is reflected by the reflector 20, and is transmitted to the pupil 40.
  • the eye box in the x-axis direction that is, in the first direction, is determined by the length of the collimator 32 in the first direction.
  • the eyebox in the first direction depends on the length of the collimator 32 included in the image emitting unit 30.
  • increasing the length of the collimator 32 increases the form factor, complicates the design, and also complicates the manufacturing process.
  • the eyebox in the y-axis direction which is the vertical axis, is determined by the number of reflectors 20 arranged in the y-axis direction.
  • FIG. 11 is a diagram for explaining the eyebox in the first direction in the optical device 300 of FIGS. 5 to 7 when viewed in the direction indicated by A in FIG. 7 .
  • virtual image light emitted from one point of the image emitting unit 30 is collimated as parallel light by the collimator 32 and transmitted to the upper surface 51 of the first optical means 50.
  • the virtual image image light totally reflected in the upper surface 51 of the first optical means 50 is transmitted to the first optical element 60, and the first optical element 60 in turn transmits it to the first optical element 60 of the second optical means 10. 2 Project the light toward side (12).
  • the parallel light collimated by the collimator 32 is totally reflected on the upper surface of the first optical means 50 and transmitted to the plurality of first optical elements 60, a virtual image is generated in the first direction (x-axis direction). It can be seen that the image light is duplicated and thus the eyebox in the first direction is expanded.
  • the eyebox in the y-axis direction which is the vertical axis, is determined by the number of second optical elements 20 arranged in the y-axis direction. Therefore, when the length of the collimator 32 is the same, the eye box in the vertical y-axis direction is kept the same, but the eye box in the horizontal x-axis direction, that is, the first direction, is the optical device 300 of FIG. 11. It can be seen that is wider than that of the optical device 200 in FIG. 10 .
  • FIGS. 12 to 15 are diagrams for explaining an optical device 400 according to another embodiment of the present invention.
  • FIG. 12 is a perspective view
  • FIG. 13 is a front view
  • FIG. 14 is a side view.
  • the optical device 400 of FIGS. 12 to 14 has the same basic principle as the optical device 300 of FIGS. 5 to 7, but each of the plurality of second optical elements 20 is an optical module in the form of a plurality of pinpoints. The difference is that it is composed of (21).
  • each of the plurality of second optical elements 20 faces each other in a virtual plane formed by the first direction and the second direction when viewed from the front, as shown in FIG. 13. It may be composed of a plurality of optical modules 21 spaced apart and arranged in an array form.
  • Each of the plurality of optical modules 21 is formed to have a size smaller than the size of a human pupil, that is, 8 mm or less, and is preferably formed to be 4 mm or less to obtain a pinhole effect by increasing the depth of field.
  • the size of the plurality of optical modules 21 is defined to mean the maximum length between any two points on the edge border of each optical module 21.
  • each optical module 21 is determined by projecting each optical module 21 on a plane that includes the center of the pupil 40 and is perpendicular to the straight line between the pupil 40 and the optical module 21. It can be the maximum length between any two points on the edge border of the orthographic projection.
  • the size is too small, the diffraction phenomenon increases, so it is preferable to make it larger than 0.3 mm, for example.
  • each of the optical modules 21 may be circular.
  • optical modules 21 may be formed in an oval shape so that they appear circular when viewed from the pupil 40.
  • optical device 400 is the same as those of the optical device 300 described above, so detailed description will be omitted.
  • FIGS. 15 to 17 are diagrams for explaining an optical device 500 according to another embodiment of the present invention.
  • FIG. 15 is a perspective view
  • FIG. 16 is a front view
  • FIG. 17 is a side view.
  • the optical device 500 of FIGS. 15 to 17 is the same as the optical device 400 of FIGS. 12 to 14, but includes a plurality of first optical elements 60 and a plurality of pinpoint-shaped optical modules 61. There is a difference in that it is composed of .
  • each of the plurality of first optical elements 60 is a plurality of optical modules 61 arranged in an array form and spaced apart from each other in a virtual plane perpendicular to the first direction when viewed from the side. It can be composed of:
  • optical module 61 Since the size and shape of these optical modules 61 are the same as those of the optical module 21 previously described in FIGS. 10 to 12, detailed description thereof will be omitted.
  • a plurality of first optical elements 60 may be configured as a plurality of pinpoint-shaped optical modules 61.
  • the first optical means 50 and the second optical means 10 may be formed integrally.
  • the virtual image image light inside the second optical means 10 is transmitted to the second optical element 20 through total reflection, but the virtual image light is transmitted to the second optical element 20 without total reflection or through total reflection two or more times. Of course, it can also be transmitted to the optical element 20.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

La présente invention concerne un dispositif optique pour réalité augmentée, le dispositif optique étant caractérisé en ce qu'il comprend : un premier moyen optique à travers lequel une lumière d'image vidéo virtuelle se déplace; une pluralité de premiers éléments optiques qui sont enfouis dans le premier moyen optique et émettent, vers un moyen optique, la lumière d'image vidéo virtuelle se déplaçant à travers le premier moyen optique; un second moyen optique qui transmet une lumière d'image d'objet réel à la pupille de l'œil d'un utilisateur et à travers lequel la lumière d'image vidéo virtuelle émise par le premier élément optique se déplace; et des seconds éléments optiques qui sont enfouis dans les seconds moyens optiques et transmettent, à la pupille de l'œil de l'utilisateur, la lumière d'image vidéo virtuelle se déplaçant à travers les seconds moyens optiques, la pluralité de premiers éléments optiques étant disposés à des intervalles dans une première direction à l'intérieur des premiers moyens optiques, la pluralité de seconds éléments optiques étant disposés à des intervalles dans une seconde direction perpendiculaire à la première direction, et un plan virtuel formé par la première direction et la seconde direction étant un plan bidimensionnel qui peut être observé à partir de la pupille de l'utilisateur.
PCT/KR2023/003412 2022-04-13 2023-03-14 Dispositif optique pour réalité augmentée ayant une région oculaire étendue WO2023200123A1 (fr)

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US20200183169A1 (en) * 2018-12-10 2020-06-11 Kura Technologies Ar headsets with improved pinhole mirror arrays
KR20210031240A (ko) * 2019-09-11 2021-03-19 엘지전자 주식회사 전자 디바이스
KR20210053249A (ko) * 2019-11-01 2021-05-11 주식회사 레티널 고스트 이미지 차단 기능 및 광 시야각을 갖는 컴팩트형 증강 현실용 광학 장치
KR20220017455A (ko) * 2022-01-25 2022-02-11 주식회사 레티널 편광 광학 소자를 이용한 증강 현실용 광학 장치

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KR101894556B1 (ko) 2016-09-08 2018-10-04 주식회사 레티널 광학 장치
KR102192942B1 (ko) 2019-09-18 2020-12-18 주식회사 레티널 광 효율을 개선한 증강 현실용 광학 장치

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KR20180106624A (ko) * 2017-03-21 2018-10-01 주식회사 파노비젼 수평 및 수직 출사동 확장수단을 갖는 투과형 hmd 광학계
US20200183169A1 (en) * 2018-12-10 2020-06-11 Kura Technologies Ar headsets with improved pinhole mirror arrays
KR20210031240A (ko) * 2019-09-11 2021-03-19 엘지전자 주식회사 전자 디바이스
KR20210053249A (ko) * 2019-11-01 2021-05-11 주식회사 레티널 고스트 이미지 차단 기능 및 광 시야각을 갖는 컴팩트형 증강 현실용 광학 장치
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