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NZ764552B2 - Waveguide illuminator - Google Patents
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NZ764552B2 - Waveguide illuminator - Google Patents

Waveguide illuminator Download PDF

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Publication number
NZ764552B2
NZ764552B2 NZ764552A NZ76455218A NZ764552B2 NZ 764552 B2 NZ764552 B2 NZ 764552B2 NZ 764552 A NZ764552 A NZ 764552A NZ 76455218 A NZ76455218 A NZ 76455218A NZ 764552 B2 NZ764552 B2 NZ 764552B2
Authority
NZ
New Zealand
Prior art keywords
light
display system
mounted display
head mounted
waveguide
Prior art date
Application number
NZ764552A
Other versions
NZ764552A (en
Inventor
Erik Heath Arend
Samarth Bhargava
Hui Chuan Cheng
Kevin Richard Curtis
Iii Miller Harry Shuck
Bradley Jay Sissom
Original Assignee
Magic Leap Inc
Filing date
Publication date
Application filed by Magic Leap Inc filed Critical Magic Leap Inc
Priority claimed from PCT/US2018/064767 external-priority patent/WO2019118357A1/en
Publication of NZ764552A publication Critical patent/NZ764552A/en
Publication of NZ764552B2 publication Critical patent/NZ764552B2/en

Links

Classifications

    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G02B2027/0105—Holograms with particular structures
    • G02B2027/0107—Holograms with particular structures with optical power
    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
    • 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
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • 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
    • G02B2027/0178—Eyeglass type
    • 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
    • G02B27/0081—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil
    • 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
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • 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
    • G02B27/0176—Head mounted characterised by mechanical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area

Abstract

optical system for an augmented reality head mounted display eyepiece that is configured to deliver images to the eye wherein the optical system includes optics. The optics are disposed so as to receive light output from the light source. The optics further arranged with respect to a spatial light modulator such that the light received from the light source passes through the optics and illuminates the spatial light modulator. The light illuminating the spatial light modulator is redirected back through the optics and is coupled into at least one waveguide through at least one in-coupling optical element. At least a portion of the coupled light is ejected from at least one waveguide by at least one out-coupling optical element and directed to the eye of the user.

Claims (22)

WHAT IS CLAIMED IS:
1. A head mounted display system configured to project light to an eye of a user to display augmented reality image content in a vision field of the user, the head mounted display system comprising: a frame configured to be supported on a head of the user; at least one light source configured to output light; a spatial light modulator disposed to receive light from the at least one light source; an eyepiece disposed on the frame, the eyepiece configured to direct light from the spatial light modulator into the eye of the user to display augmented reality image content to the vision field of the user, at least a portion of the eyepiece being transparent and disposed at a location in front of the eye of the user when the user wears the head mounted display system, wherein the transparent portion of the eyepiece transmits light from a portion of a physical environment in front of the user to the eye of the user to provide a view of the portion of the physical environment in front of the user, the eyepiece comprising: at least one waveguide configured to propagate light output from the at least one light source; at least one in-coupling optical element configured to diffractively in-couple light from the spatial light modulator into the at least one waveguide; and at least one out-coupling optical element configured to couple light guided within the waveguide out of the waveguide and direct the light to the eye of the user; and optics having optical power, the optics disposed so as to receive light output from the at least one light source after the light output propagates through the at least one waveguide, the optics arranged with respect to the spatial light modulator such that the light received from the at least one light source passes through the optics and illuminates the spatial light modulator, wherein the head mounted display system is configured such that the light illuminating the spatial light modulator is redirected back through the optics and is diffractively in-coupled into the at least one waveguide through the at least one in-coupling optical element and at least a portion of the diffractively in-coupled light is ejected from the at least one waveguide and directed to the eye of the user, wherein the at least one waveguide has a first side and a second side opposite the first side and closer to the physical environment than the eye of the user, the optics and the spatial light modulator on the first side and said at least one light source on the second side of the at least one waveguide, wherein the light from the light source is received into the at least one waveguide from the second side and is transmitted through the first side opposite the second side towards the spatial light modulator; and wherein the first side and the second side of the waveguide are configured to guide light propagating within the waveguide by total internal reflection.
2. The head mounted display system of Claim 1, wherein the at least one light source comprises a multi-color light source configured to emit different color light at different times.
3. The head mounted display system of Claim 1 or 2, wherein the at least one light source comprises a red, green, blue (RGB) light source configured to emit red color, green color, and blue color light at different times.
4. The head mounted display system of any one of Claims 1 to 3, comprising: a plurality of laterally displaced light emitters configured to output light; collection optics configured to collect the light from the plurality of laterally displaced light emitters; a diffuser; and a plurality of apertures proximal the diffuser.
5. The head mounted display system of any one of Claims 1 to 4, wherein the at least one waveguide comprises a stack of waveguides.
6. The head mounted display system of Claim 5, wherein different waveguides of the stack of waveguides are configured to output light with different respective colors.
7. The head mounted display system of any one of Claims 1 to 6, wherein the at least one in-coupling optical element comprises a plurality of in-coupling optical elements laterally displaced with respect to each other.
8. The head mounted display system of Claim 7, wherein the plurality of in-coupling optical elements comprises a first in-coupling optical element configured to couple light of multiple colors into a first waveguide of the at least one waveguide to guide the light therein and a second in-coupling optical element configured to couple light of multiple colors into a second waveguide of the at least one waveguide to guide the light therein, the first in- coupling optical element and the second in-coupling optical element laterally displaced with respect to each other.
9. The head mounted display system of Claim 7 or 8, wherein the at least one light source comprises a first light source disposed with respect to the optics and the spatial light modulator to direct light to the first in-coupling optical element and a second light source disposed with respect to the optics and the spatial light modulator to direct light to the second in-coupling optical element.
10. The head mounted display system of any one of Claims 1 to 9, further comprising an analyzer wherein the analyzer is configured to also serve as a polarizer to light propagating from the light source to the optics.
11. The head mounted display system of any one of Claims 1 to 10, further comprising a color filter array disposed on a side of the waveguide proximate the user, wherein the color filter array comprises a plurality of different color filters.
12. The head mounted display system of Claim 11, wherein the color filter array comprises an absorbing material disposed between the plurality of different color filters, configured to reduce propagation and reflection of stray light.
13. The head mounted display system of any one of Claims 1 to 12, further comprises a plurality of color filters laterally displaced with respect to each other, said plurality of color filters aligned laterally with respect to a plurality of in-coupling optical elements that are laterally displaced with respect to each other such that light passing through respective color filters is incident on respective in-coupling optical elements.
14. The head mounted display system of any of Claim 13, wherein the plurality of color filters comprising a color filter array.
15. The head mounted display system of any one of Claims 1 to 14, wherein said at least one in-coupling optical element comprises first and second in-coupling optical elements, said head mounted display system further comprising first and second color filters associated with said first and second in-coupling optical elements, respectively.
16. The head mounted display system of Claim 15, wherein the first color filter transmits more light of a first color than the second color filter and the second color filter transmits more light of the second color than the first color.
17. The head mounted display system of Claim 15 or 16, wherein said at least one waveguide comprises first and second waveguides, and wherein the first in-coupling optical element couples more light of a first color than the second color filter into said first waveguide and the second in-coupling optical element couples more light of the second color than the first color into said second waveguide.
18. The head mounted display system of any one of Claims 15 to 17, wherein the first and second color filters are laterally aligned with the respective first and second in-coupling optical elements.
19. The head mounted display system of any one of Claim 15 to 18, further comprising first and second light sources, wherein the first and second light sources are disposed in first and second optical paths between the first and second light sources and the first and second in-coupling optical elements, respectively.
20. The head mounted display system of any one of Claim 15 to 19, further comprising first and second light sources, wherein the first and second light sources are disposed to direct light through the first and second color filters, respectively, to the first and second in- coupling optical elements, respectively.
21. The head mounted display system of Claim 19 or 20, wherein the first and second light sources comprise first and second color light sources configured to emit first and second colors, respectively.
22. The head mounted display system of Claim 19 or 20, wherein the first and second light sources comprise broad band color light sources configured to emit both said first and second colors.
NZ764552A 2018-12-10 Waveguide illuminator NZ764552B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201762597359P 2017-12-11 2017-12-11
US201862624109P 2018-01-30 2018-01-30
PCT/US2018/064767 WO2019118357A1 (en) 2017-12-11 2018-12-10 Waveguide illuminator

Publications (2)

Publication Number Publication Date
NZ764552A NZ764552A (en) 2024-11-29
NZ764552B2 true NZ764552B2 (en) 2025-03-04

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