Retinal projection display device and phase profile optimization method thereof
AssigneesSamsung Electronics Co., Ltd., Seoul National University R&Db Foundation
InventorsSeokil MOON, Minseok CHAE, Changkun LEE, Dongheon YOO, Byoungho LEE
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Abstract
A retinal projection display device is provided. The retinal projection display device includes a light source configured to emit light, a spatial light modulator configured to generate diffracted light by diffracting the emitted light, a holographic optical element configured to reflect the diffracted light by duplicating the diffracted light into a plurality of complex wavefronts, and a field lens configured to focus the plurality of complex wavefronts to a plurality of respective focal points in an eye-box, wherein the plurality of complex wavefronts overlap each other.
Claims21
A retinal projection display device comprising:
- a light source configured to emit light;
- a spatial light modulator configured to generate diffracted light by diffracting the light emitted by the light source;
- a holographic optical element configured to reflect the diffracted light by duplicating the diffracted light into a plurality of complex wavefronts;
- and
- a field lens configured to focus the plurality of complex wavefronts to a plurality of focal points in an eye-box,
- wherein the plurality of complex wavefronts are continually arranged to overlap each other.
A phase profile optimization method of a retinal projection display device, wherein the retinal projection display device comprises:
- a light source configured to emit light;
- a spatial light modulator configured to generate diffracted light by diffracting the light emitted by the light source;
- a holographic optical element configured to reflect the diffracted light by duplicating the diffracted light into a plurality of complex wavefronts;
- and
- a field lens configured to focus the plurality of complex wavefronts to a plurality of respective focal points in an eye-box,
- the phase profile optimization method comprising:
- inputting an arbitrary phase profile to the spatial light modulator;
- performing a first propagation simulation on the plurality of complex wavefronts duplicated by the holographic optical element;
- performing a second propagation simulation until a virtual image is reconstructed, based on the plurality of complex wavefronts on which the first propagation simulation is performed;
- determining a loss value between the reconstructed virtual image and a target image;
- based on the loss value being greater than a predetermined threshold value, updating a current phase profile;
- and
- based on the loss value being less than or equal to the predetermined threshold value, ending the update.
A non-transitory computer-readable storage medium storing instructions that, when executed by at least one processor, cause the at least one processor to:
- input an arbitrary phase profile to a spatial light modulator;
- perform a first propagation simulation on a plurality of complex wavefronts duplicated by a holographic optical element;
- perform a second propagation simulation until a virtual image is reconstructed, based on the plurality of complex wavefronts on which the first propagation simulation is performed;
- determine a loss value between the reconstructed virtual image and a target image;
- based on the loss value being greater than a predetermined threshold value, update a current phase profile;
- and
- based on the loss value being less than or equal to the predetermined threshold value, end the update.
Dependencies are inferred from the claim text.