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US 11,378,256 B2Granted
Light output system with reflector and lens for highly spatially uniform light output
AssigneeMagic Leap, Inc.
InventorsBradley Jay Sissom, Heidi Leising Hall, Kevin Curtis
Life of this patent
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Abstract
In some embodiments, optical systems with a reflector and a lens proximate a light output opening of the reflector provide light output with high spatial uniformity and high efficiency. The reflectors are shaped to provide substantially angularly uniform light output and the lens is configured to transform this angularly uniform light output into spatially uniform light output. The light output may be directed into a spatial light modulator, which modulates the light to project an image.
Claims18
A display system comprising:
- a light emitter;
- a reflector optically coupled to the light emitter and configured to receive light from the light emitter, the reflector configured to output light with increased angular uniformity relative to light received from the light emitter;
- a lens optically coupled to the reflector and configured to receive light from the reflector, the lens configured to output light with increased spatial uniformity relative to light output from the reflector;
- a spatial light modulator configured to receive light from the lens and to modulate the light received from the lens to create an image;
- and
- a stack of waveguides, wherein each waveguide of the stack comprises a light incoupling optical element configured to incouple light from an associated light emitter via the light modulating device.
3 more elements
A display system comprising:
- a light emitter;
- a reflector optically coupled to the light emitter and configured to receive light from the light emitter, the reflector configured to output light with increased angular uniformity relative to light received from the light emitter;
- a lens optically coupled to the reflector and configured to receive light from the reflector, the lens configured to output light with increased spatial uniformity relative to light output from the reflector;
- and
- a spatial light modulator configured to receive light from the lens and to modulate the light received from the lens to create an image,
- wherein the reflector is one of a plurality of reflectors formed as openings extending across a thickness of a common unitary body, wherein each reflector has an associated lens forward of the output opening of the reflector,
- wherein the unitary body has a multi-tiered surface, wherein some reflectors have output openings on a different tier than other reflectors.
4 more elements
A display system comprising:
- a light emitter;
- a reflector optically coupled to the light emitter and configured to receive light from the light emitter, the reflector configured to output light with increased angular uniformity relative to light received from the light emitter;
- a lens optically coupled to the reflector and configured to receive light from the reflector, the lens configured to output light with increased spatial uniformity relative to light output from the reflector;
- a spatial light modulator configured to receive light from the lens and to modulate the light received from the lens to create an image;
- and
- a mask between the reflector and the spatial light modulator.
3 more elements
A display system comprising:
- a plurality of reflectors, each reflector comprising:
- an input end;
- an output end;
- an even number of faceted sides extending between the input end and the output end, wherein two opposing sides of the reflector have a first cross-sectional profile and the remaining sides have a second cross-sectional profile different from the first cross-section profile;
- a plurality of light emitters, each light emitter located at an input end of an associated one of the plurality reflectors;
- a plurality of lenses, each lens disposed at an output end of an associated one of the plurality of reflectors and located one focal length away from an associated light emitter of the associated one of the plurality of reflectors;
- a light modulating device configured to receive light output from the plurality of lens;
- and
- a stack of waveguides, wherein each waveguide of the stack comprises:
- a light incoupling optical element configured to incouple light received from an associated one of the plurality of light emitters via the light modulating device, wherein different light incoupling optical elements are in a path of light of different ones of the plurality of light emitters;
- and
- a light outcoupling optical element,
- wherein light outcoupling optical elements of some waveguides are configured to output light with different amounts of divergence than light outcoupling optical element of some of the other waveguides of the stack of waveguides.
10 more elements
Dependencies are inferred from the claim text.