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WO2020009251A1 - Dispositif de mise en œuvre de réalité augmentée en couleur comprenant un élément optique holographique réfléchissant - Google Patents

Dispositif de mise en œuvre de réalité augmentée en couleur comprenant un élément optique holographique réfléchissant Download PDF

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Publication number
WO2020009251A1
WO2020009251A1 PCT/KR2018/007514 KR2018007514W WO2020009251A1 WO 2020009251 A1 WO2020009251 A1 WO 2020009251A1 KR 2018007514 W KR2018007514 W KR 2018007514W WO 2020009251 A1 WO2020009251 A1 WO 2020009251A1
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WO
WIPO (PCT)
Prior art keywords
holographic optical
film
optical element
display unit
augmented reality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/007514
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English (en)
Korean (ko)
Inventor
김은수
황용석
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Research Institute for Industry Cooperation of Kwangwoon University
Original Assignee
Research Institute for Industry Cooperation of Kwangwoon University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research Institute for Industry Cooperation of Kwangwoon University filed Critical Research Institute for Industry Cooperation of Kwangwoon University
Priority to PCT/KR2018/007514 priority Critical patent/WO2020009251A1/fr
Publication of WO2020009251A1 publication Critical patent/WO2020009251A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements

Definitions

  • the technical field to which the present invention pertains relates to a wearable augmented reality apparatus using holographic optical elements.
  • This study corresponds to the Holo-Digilog Human Media Research Center project conducted with the support of the Korea Research Foundation in 2018 (No. 2011-0030079).
  • Augmented reality is a system that can perform information transfer by adding a virtual image to an existing image, and is a service that displays mall names, rating information, phone information, or location information of acquaintances in surrounding image information.
  • the augmented reality generally operates by adding an image to an image captured by a camera based on location information using GPS and direction information using a geomagnetic sensor.
  • augmented reality By displaying additional information on the glasses display, augmented reality can be directly implemented in the eyes of a person.
  • home appliances equipped with communication functions are increasing, and these home appliances can transmit their status information to smartphones and PCs.
  • the state information transmitted from the home appliance it is simply displayed to the user in the manner of text, web, application, etc. If the information is utilized, it may be possible to implement the augmented reality system in the home.
  • the wearable device known as Google Glass realizes augmented reality by overlapping the real world image and the 3D virtual image when the user wears it like glasses.
  • the hologram is a medium in which light waves are recorded, and stores intensity and phase information of light waves.
  • the hologram may reconstruct visual information in three dimensions by using intensity and phase information of light waves.
  • an interference fringe between the signal light and the reference light is recorded on the medium by irradiating object light (signal light) and reference light (reference light) having coherence.
  • the method of recording / reproducing hologram is largely divided into transmission type and reflection type.
  • the reflective holographic optical element installed in the AR apparatus reflects the virtual image generated by the display unit at a predetermined reflection angle, thereby enhancing transparency, improving resolution, and incident the virtual image at an elevation angle.
  • an augmentation apparatus including a display unit generating a virtual image, a holographic optical element reflecting the virtual image to reach a user's eye, and a frame in which the display unit and the holographic optical element are installed. It provides a realization device.
  • It provides an augmented reality glasses including a holographic optical element formed of a single film through the transmission, the spectacle frame provided with the display, and a lens connected to the spectacle frame and the holographic optical element is installed.
  • the reflective holographic optical element recorded at a predetermined reflection angle using a plurality of color lights reflects a virtual image generated at the display unit at a predetermined reflection angle.
  • FIG. 1 is a block diagram illustrating an apparatus for implementing augmented reality according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a structure of a holographic optical device of an apparatus for implementing augmented reality according to an embodiment of the present invention.
  • 3 and 4 are block diagrams illustrating the recording of color light into the holographic optical element of the apparatus for implementing augmented reality according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating an augmented reality implementation device having a wearable structure according to another embodiment of the present invention.
  • FIG. 6 is a view illustrating an operation principle of the augmented reality implementation device having a wearable structure according to another embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating an apparatus for implementing augmented reality.
  • the apparatus for implementing augmented reality 10 may include a display unit 100, a holographic optical device 200, and a frame 300.
  • the augmented reality implementation apparatus 10 may omit some of the various components illustrated in FIG. 1 or may further include other components.
  • the frame 300 is an object to which the display unit 100 and the holographic optical element 200 are installed, and is a component that forms a skeleton and an appearance of the device so that a user can wear the augmented reality implementing device according to the present invention.
  • the frame 300 may be a spectacle frame, a goggle frame, a body of a helmet, or a body of a head mounted display (HMD).
  • the frame 300 may include a transmissive portion 350.
  • the transmissive portion 350 is a component that provides a field of view so that a user can see the real world, and the material is transparent or translucent. According to the principle of the present invention, if only the display unit 100 and the holographic optical element 200 are properly installed in the frame 300 in any way, the operation of the device is possible, but only the holographic optical element 200 is actually in front of the fabrication. It is hard to float.
  • the holographic optical element 200 may be installed on the spectacle lens, or may be installed on the transparent cover of the helmet.
  • the holographic optical element 200 may be recessed on the spectacle lens or the transparent cover of the helmet, or may be installed exposed to the surface. Can be.
  • the holographic optical device 200 may be installed to have a predetermined size near the focal point of the transmission unit 350 in relation to the eyes of the user, and may be installed in the entire area of the transmission unit 350.
  • the size of the holographic optical element 200 may be implemented to be smaller than the size of the pupil of the human eye.
  • the pupils may vary in size depending on illuminance, age, and other circumstances.
  • the mirror may be formed in a circle or polygon. As the size of the holographic optical device 200 decreases, the brightness of the virtual image generated by the display unit 100 decreases, so that the size of the holographic optical device 200 is set in consideration of the sharpness and brightness of the virtual image. Just do it.
  • the display unit 100 is a component for generating a virtual image and is installed in the frame 300.
  • the frame 300 may be installed inside or outside the spectacle legs, and if the aesthetics are considered, the frame 300 may be recessed on the spectacles legs without being visible from the outside.
  • the display unit 100 corresponds to a surface light source, the display unit 100 generates a virtual image of a flat or curved surface (eg, a flexible display).
  • the display unit 100 is illustrated as a point light source, it may be implemented as a surface light source, and the display unit 100 may be implemented in plural.
  • the principle of using the holographic optical device 200 has some similarities to viewing a deep image through a pinhole in a pinhole camera or a pinhole lens.
  • the light from the object is confined as it passes through the pinhole, confined to a relatively narrow area of the retina, making the object more visible than naked eyes.
  • Light from an object is relatively narrow in the retina.
  • the conventional problem may be solved by allowing the light emitted from the display unit 100 to pass through the pinhole to reach the eye.
  • the holographic optical element is transparent, diffraction occurs hardly.
  • the light that has passed through the pinhole by the conventional diffraction can be spread to improve the structure that was limited to make a clear image.
  • the reason for using the holographic optical device 200 is to reflect the virtual image from the display while passing light from an object located across the lens.
  • light starting from an object forms on the retina, and an image overlaps with light starting from the display unit 100. Since the overlapped image forms on a point of the retina, the real and virtual images are clearly visible without the need for eye focus.
  • the holographic optical device 200 may be implemented in two structures.
  • the holographic optical device 200 is implemented as a transparent film unlike a general mirror coated with silver on one surface of the glass.
  • the holographic optical element 200 is a diffraction plate including volume diffraction elements diffracted in a predesigned direction, and functions to transmit and diffract light having different wavelength bands in the same direction.
  • An optical element that changes the direction of wave propagation is called a diffraction grating.
  • the holographic optical device 200 may be formed in a single layer or a plurality of layers and stacked on one surface of the transmission unit.
  • the holographic optical device 200 may be a film in which a plurality of films 210, 220, and 230 are recorded by transmitting a single light having a different color, respectively, or a single film 240 recorded by transmitting a plurality of lights. have.
  • the holographic optical device 200 may be formed of a photopolymer by using a transmissive hologram recording method.
  • the holographic optical element 200 may be generated by forming an interference pattern on a volume holographic optical element (VHOE) film.
  • the base film may be composed of a polymeric binder, monomers, an initiator system, and a sensitizing dye.
  • the monomer is a part that stores substantial information, and undergoes a chemical reaction of photopolymerization, causing a change in refractive index.
  • Initiator is the part that makes polymerization easily occur at the beginning
  • photosensitive dye is the part that can select the reaction wavelength and interact with the initiator to start the polymerization reaction by absorbing the light of the desired band.
  • the interference pattern is formed by aligning a specific shape as the monomer is polymerized by combining with a functional group when exposed according to the interference pattern by two laser beams (object light and reference light).
  • the interference pattern by exposure is recorded. Assuming that the two beams interfere with the recording medium, the constructive interference occurs in the bright areas, and the destructive interference in the dark areas is assumed to be dark.
  • the photopolymerization reaction becomes active. The amount of polymerization depends on the intensity of the two beams incident.
  • the monomer in the dark portion diffuses to a bright area to cause a photopolymerization reaction to determine the amount of photopolymerization reaction.
  • the photopolymer film is divided into a binder-rich region and a photopolymer-rich region, and the binder-collecting region has a low refractive index, while the polymer-gathering region has a high refractive index. Modulation can produce phase holograms.
  • the holographic optical device 200 may be sealed by using any one of a thermal compression method and an adhesive compression method before being generated and stacked on one surface of the transmission part.
  • the present invention can prevent deterioration of the holographic optical element 200 through this sealing process, and it becomes possible to protect the holographic optical element 200 from an external environment.
  • the surface of the holographic optical element 200 may be curved as well as flat. For example, when the area of the reflector 210 is increased to brighten the virtual image, the depth may be lowered, and the range of focusing may be narrowed. If the reflective part 210 is formed in a curved surface, it is easy to focus. A zoom effect such as a concave mirror or a convex mirror can also be obtained.
  • the holographic optical device 200 may be generated by sequentially transmitting red light, green light, and blue light in a predetermined order so as to perform a transparent full color reflector function even when light having any wavelength band is incident.
  • red light means light having a wavelength band associated with red (R)
  • green light means light having a wavelength band associated with green (G)
  • blue light has a wavelength band associated with blue (B). It means light.
  • the reflective holographic optical device 200 is generated by stacking a plurality of films 210, 220, and 230 recording a single color or recording a plurality of lights on a single film 240.
  • the holographic optical device 200 may be generated using light related to other colors in addition to red light, green light, blue light, and the like, as long as it can effectively perform the transparent screen function.
  • each film can record one of red light, green light, and blue light.
  • the film 210 may record red light
  • the film 220 may record green light
  • the film 230 may record blue light.
  • Each light can be recorded with a color light source laser, and each film can be laminated in parallel using a special adhesive.
  • the order of color lamination may be changed so that the combination of full colors is optimal because the reflectance may be different at the time of recording of each film.
  • the film can be stacked in the order of the film which recorded the red light-> the film which recorded the green light-> the film which recorded the blue light, and the film which recorded the green light-> the film which recorded the blue light-> the film which recorded the red light It is to be understood that this is merely an example and not limited thereto, and a suitable combination may be used depending on the design to be implemented.
  • a light source for each color is incident by the single film in the same direction in consideration of the incident angle of the image of the display unit, and is recorded by the reflective hologram recording method.
  • FIG. 5 illustrates augmented reality glasses by way of example.
  • the augmented reality glasses have a viewing angle based on (i) the distance D1 between the display unit 100 and the holographic optical element 200 and (ii) the distance D2 between the holographic optical element 200 and the user's eyes. Adjust the virtual image to reach your eyes.
  • the display 110 may be located at a predetermined point in the frame (glasses frame) according to the principle that the viewing angle increases as the distance between the display 100 and the holographic optical device 200 increases.
  • the holographic optical device 200 may be located at a predetermined point in a frame (transmitter or lens) according to the principle that the viewing angle increases as the distance between the holographic optical device 200 and the user's eyes decreases.
  • the display unit 100 may be disposed substantially in line with the transmissive part 350 to attempt high-angle incidence on the reflective holographic optical device 200.
  • the display unit 100 may incident the virtual image at an angle inclined by 60 degrees or more with respect to the vertical direction from one surface of the holographic optical device 200.
  • the display unit 100 In consideration of the traveling direction of the light from the reflective surface of the reflective holographic optical element 200 to the eyes of the user and the traveling direction of the light from the display 100 to the reflective surface, the display unit 100 has a suitable angle range. It is installed in the frame 300 or the transmission unit 350 therein.
  • FIG. 6 is a diagram illustrating an operating principle of the apparatus for implementing augmented reality according to the present embodiment.
  • a virtual image having a first width A is reflected by the holographic optical element 231 positioned on the left side to reach the user's eye.
  • the user's eye perceives that the virtual image is positioned as A 'on the opposite side through the holographic optical element 200.
  • a virtual image having a predetermined second width B is reflected by the holographic optical element 232 positioned at the center to reach the user's eye.
  • the eye of the user recognizes that the virtual image is positioned as B 'on the opposite side through the holographic optical device 200.
  • the virtual image of the predetermined third width A is reflected by the holographic optical element 233 positioned on the right side of the display unit 130 to reach the eyes of the user.
  • the eye of the user recognizes that the virtual image is positioned as C ′ opposite the holographic optical device 200.
  • each of the reflective holographic optical elements 231, 232, and 233 has a structure that reflects to the user's eyes. That is, the holographic optical device may include (i) first films 231 and (ii) display parts 120 that reflect at an obtuse angle with respect to the first light incident from the display 110 based on one surface of the holographic optical device.
  • the second film 232 reflecting at right angles to the second light incident from the second light; (iii) the third film 233 reflecting at acute angle to the third light incident from the display unit 130; It can be implemented in combination.
  • the general mirror cannot have the reflection angle of the reflective holographic optical element according to the present embodiment because the incident angle and the reflection angle of light are the same with respect to the normal line.
  • the display unit 100 may output a virtual image to overlap the first width A, the second width B, and the third width C, and the user may output the plurality of holographic optical elements 200. You can watch the virtual image (A '+ B' + C ') with the improved resolution.
  • the display unit may be installed at a position far from the user's eye and close to the frame or the transmission part according to the reflection angle of the first film 231, the reflection angle of the second film 232, and the reflection angle of the third film 232. . That is, the distance D3 may be adjusted to be shorter than the preset length to adjust the incident angle of the image.
  • the augmented reality implementer or augmented reality glasses increase the viewing angle at which the virtual image is reflected by adjusting the reflection angle of the holographic optical element and the position of the display unit.
  • the augmented reality apparatus or augmented reality glasses may overlap the real world image and the virtual image image with a wide viewing angle to show the user augmented reality with improved resolution.
  • transparency and slim structure can be seen as a unique feature of this embodiment.
  • the plurality of components included in the augmented reality apparatus or augmented reality glasses may be combined with each other and implemented as at least one module.
  • the components are connected to the communication path connecting the software module or the hardware module inside the device and operate organically with each other. These components communicate using one or more communication buses or signal lines.

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

Abstract

Les présents modes de réalisation concernent un dispositif de mise en œuvre de réalité augmentée dans lequel un élément optique holographique réfléchissant imprimé à un angle de réflexion prédéfini au moyen d'une pluralité de lumières colorées réfléchit, à un angle de réflexion prédéfini, une image virtuelle générée par une unité d'affichage, ce qui permet d'améliorer la transparence et la résolution et de régler la position de l'unité d'affichage selon un angle d'incidence.
PCT/KR2018/007514 2018-07-03 2018-07-03 Dispositif de mise en œuvre de réalité augmentée en couleur comprenant un élément optique holographique réfléchissant Ceased WO2020009251A1 (fr)

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PCT/KR2018/007514 WO2020009251A1 (fr) 2018-07-03 2018-07-03 Dispositif de mise en œuvre de réalité augmentée en couleur comprenant un élément optique holographique réfléchissant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2018/007514 WO2020009251A1 (fr) 2018-07-03 2018-07-03 Dispositif de mise en œuvre de réalité augmentée en couleur comprenant un élément optique holographique réfléchissant

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2611300A (en) * 2021-09-28 2023-04-05 Trulife Optics Ltd Holographic device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150086139A (ko) * 2014-01-17 2015-07-27 광운대학교 산학협력단 홀로그래픽 광학 소자 및 이를 구비하는 디스플레이 장치
US20170102548A1 (en) * 2015-10-12 2017-04-13 Eric Tremblay Adjustable pupil distance wearable display
US20170176755A1 (en) * 2015-12-18 2017-06-22 Ostendo Technologies, Inc. Systems and Methods for Augmented Near-Eye Wearable Displays
WO2018057660A2 (fr) * 2016-09-20 2018-03-29 Apple Inc. Système de réalité augmentée
KR20180044238A (ko) * 2015-07-03 2018-05-02 에씰로 앙터나시오날 증강 현실을 위한 방법 및 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150086139A (ko) * 2014-01-17 2015-07-27 광운대학교 산학협력단 홀로그래픽 광학 소자 및 이를 구비하는 디스플레이 장치
KR20180044238A (ko) * 2015-07-03 2018-05-02 에씰로 앙터나시오날 증강 현실을 위한 방법 및 시스템
US20170102548A1 (en) * 2015-10-12 2017-04-13 Eric Tremblay Adjustable pupil distance wearable display
US20170176755A1 (en) * 2015-12-18 2017-06-22 Ostendo Technologies, Inc. Systems and Methods for Augmented Near-Eye Wearable Displays
WO2018057660A2 (fr) * 2016-09-20 2018-03-29 Apple Inc. Système de réalité augmentée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2611300A (en) * 2021-09-28 2023-04-05 Trulife Optics Ltd Holographic device
GB2611300B (en) * 2021-09-28 2023-10-11 Trulife Optics Ltd Holographic device

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