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NZ755267B2 - Virtual and augmented reality systems and methods - Google Patents
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NZ755267B2 - Virtual and augmented reality systems and methods - Google Patents

Virtual and augmented reality systems and methods

Info

Publication number
NZ755267B2
NZ755267B2 NZ755267A NZ75526714A NZ755267B2 NZ 755267 B2 NZ755267 B2 NZ 755267B2 NZ 755267 A NZ755267 A NZ 755267A NZ 75526714 A NZ75526714 A NZ 75526714A NZ 755267 B2 NZ755267 B2 NZ 755267B2
Authority
NZ
New Zealand
Prior art keywords
waveguide
user
eye
waveguides
image data
Prior art date
Application number
NZ755267A
Other versions
NZ755267A (en
Inventor
Brian Schowengerdt
Original Assignee
Magic Leap Inc
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 Magic Leap Inc filed Critical Magic Leap Inc
Priority claimed from NZ720610A external-priority patent/NZ720610A/en
Publication of NZ755267A publication Critical patent/NZ755267A/en
Publication of NZ755267B2 publication Critical patent/NZ755267B2/en

Links

Classifications

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Abstract

Disclosed is a system for displaying virtual content to a user. The system includes an accommodation tracking module, an image-generating source, a light generator at least one waveguide, a first variable focus element (VFE) and a second variable focus element. The accommodation tracking module determines an accommodation of the user's eye. The image-generating source provides one or more frames of image data in a time-sequential manner. The light generator projects light associated with the one or more frames of image data. The at least one waveguide receives light rays associated with image data and transmits the light rays toward the user's eye. The first VFE is adjacent to one side of the at least one waveguide for varying a focus of the transmitted light based at least in part on the determined accommodation of the user's eye. The second VFE is adjacent to an opposite side of the at least one waveguide for compensating that cancels out optical effects of the first VFE for light rays traveling from the real world through the at least one waveguide towards the user’s eye. rmines an accommodation of the user's eye. The image-generating source provides one or more frames of image data in a time-sequential manner. The light generator projects light associated with the one or more frames of image data. The at least one waveguide receives light rays associated with image data and transmits the light rays toward the user's eye. The first VFE is adjacent to one side of the at least one waveguide for varying a focus of the transmitted light based at least in part on the determined accommodation of the user's eye. The second VFE is adjacent to an opposite side of the at least one waveguide for compensating that cancels out optical effects of the first VFE for light rays traveling from the real world through the at least one waveguide towards the user’s eye.

Description

In one embodiment, a system of displaying virtual content to a user, comprises an image- generating source to provide one or more frames of image data, a multicore assembly comprising a plurality of multicore fibers to project light associated with the one or more frames of image data, a multicore fiber of the plurality of multicore fibers emitting light in a wavefront, such that the multicore assembly produces an aggregate wavefront of the projected light, and a phase modulator to induce phase delays between the multicore fibers in a manner such that the aggregate wavefront emitted by the multicore assembly is varied, thereby varying a focal distance at which the user perceives the one or more frames of image data.
In another embodiment, a system for displaying virtual content to a user comprises an array of microprojectors to project light beams associated with one or more frames of image data to be presented to the user, wherein the microprojector is configurable to be movable relative to one or more microprojectors of the array of the microprojectors, a frame to house the array of microprojectors, a processor operatively coupled to the one or more microprojectors of the array of microprojectors to control one or more light beams transmitted from the one or more projectors in a manner such that the one or more light beams are modulated as a function of a position of the one or more microprojectors relative to the array of microprojectors, thereby enabling delivery of a lightfield image to the user. [00265A] In another embodiment, there is provided a system for displaying virtual content to a user, comprising: an accommodation tracking module to determine an accommodation of the user's eye; an image-generating source to provide one or more frames of image data in a time-sequential manner; a light generator to project light associated with the one or more frames of image data; at least one waveguide to receive light rays associated with image data and to transmit the light rays toward the user's eye, a first variable focus element (VFE) adjacent one side of the at least one waveguide to vary a focus of the transmitted light based at least in part on the determined accommodation of the user's eye, and a second variable focus element (VFE) adjacent an opposite side of the at least one waveguide to compensate to cancel out optical effects of the first VFE for light rays traveling from the real world through the at least one waveguide towards the user’s eye.
Additional and other objects, features, and advantages of the invention are described in the detail description, figures and claims.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 illustrates a user's view of augmented reality (AR) through a wearable AR user device, in one illustrated embodiment.
Figs. 2A-2E illustrate various embodiments of wearable AR devices.
Fig. 3 illustrates a cross-sectional view of the human eye, in one illustrated embodiment.
Figs. 4A -4D illustrate one or more embodiments of various internal processing components of the wearable AR device.
Figs. 5A-5H illustrate embodiments of transmitting focused light to a user through a transmissive beamsplitter substrate.
Figs. 6A and 6B illustrate embodiments of coupling a lens element with the transmissive beamsplitter substrate of Figs. 5A-5H.
Figs. 7A and 7B illustrate embodiments of using one or more waveguides to transmit light to a user.
Figs. 8A-8Q illustrate embodiments of a diffractive optical element (DOE).

Claims (19)

The claims defining the invention are as follows:
1. A system for displaying virtual content to a user, comprising: an accommodation tracking module to determine an accommodation of the user's eye; an image-generating source to provide one or more frames of image data in a time- sequential manner; a light generator to project light associated with the one or more frames of image data; at least one waveguide to receive light rays associated with image data and to transmit the light rays toward the user's eye, a first variable focus element (VFE) adjacent one side of the at least one waveguide to vary a focus of the transmitted light based at least in part on the determined accommodation of the user's eye, and a second variable focus element (VFE) adjacent an opposite side of the at least one waveguide to compensate to cancel out optical effects of the first VFE for light rays traveling from the real world through the at least one waveguide towards the user’s eye.
2. The system of claim 1, wherein the at least one waveguide comprises a plurality of waveguides, and wherein a waveguide of the plurality of waveguides is a waveguide element, wherein the focus of a first frame of image data transmitted from a first waveguide of the plurality of waveguides is different from the focus of a second frame of image data transmitted from a second waveguide of the plurality of waveguides.
3. The system of claim 2, wherein the first frame is a first layer of a 3D scene, and a second frame is a second layer of the 3D scene.
4. The system of any one of claims 1 to 3, further comprising a blurring module to blur a portion of the one or more frames of image data in a manner such that the portion is out of focus when viewed by the user.
5. The system of any one of claims 1 to 4, wherein the at least one waveguide is electro-active.
6. The system of any one of claims 1 to 5, wherein a waveguide of the at least one waveguide corresponds to a fixed focal plane.
7. The system of any one of claims 1 to 6, further comprising an exit pupil, wherein a diameter of the exit pupil is no greater than 0.5 mm.
8. The system of any one of claims 1 to 7, wherein the light generator is a scanning fiber display.
9. The system of claim 7, further comprising an array of exit pupils.
10. The system of claim 7, further comprising a plurality of light generators, a light generator coupled to an exit pupil.
11. The system of any one of claims 1 to 8, further comprising an exit pupil expander.
12. The system of claim 7, wherein the exit pupil is switchable based at least in part on the determined accommodation of the user's eye.
13. The system of any one of claims 1 to 12, wherein the at least one waveguide comprises a plurality of waveguides, the system further comprising at least one lens respectively disposed between the waveguides.
14. The system of claim 13, wherein each of the at least one lens has a static focal distance.
15. The system of claim 13, wherein the at least one lens comprises a plurality of lenses.
16. The system of claim 14, wherein the first VFE is slaved to the determined accommodation of the user's eye, such that one of the plurality of waveguides outputs an in-focus wavefront.
17. The system of claim 16, wherein the at least one lens causes the plurality of waveguides to simultaneously create a plurality of different focal planes of wavefronts.
18. The system of claim 17, wherein the plurality of waveguides comprises three waveguides, and the one waveguide that outputs an in-focus wavefront is a middle one of the three waveguides.
19. The system of claim 18, wherein a first one of the other of the three waveguides outputs a + margin wavefront, and a second one of the other of the three waveguides outputs a - margin wavefront.
NZ755267A 2013-11-27 2014-11-27 Virtual and augmented reality systems and methods NZ755267B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201361909774P 2013-11-27 2013-11-27
US61/909,774 2013-11-27
NZ720610A NZ720610A (en) 2013-11-27 2014-11-27 Virtual and augmented reality systems and methods

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NZ755267A NZ755267A (en) 2021-06-25
NZ755267B2 true NZ755267B2 (en) 2021-09-28

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