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US 2025/0164668 A1Published application
Optical assembly with high-refractive-index fresnel lens and chromatic aberration corrector
AssigneeMeta Platforms Technologies, LLC
InventorsYang Zhao, Ying Geng, Jacques Gollier, Douglas Robert Lanman
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Abstract
An optical assembly includes a Fresnel lens and a diffractive optical element. The Fresnel lens includes a high-refractive-index material having a refractive index greater than 1.9. The diffractive optical element is optically coupled with the Fresnel lens to compensate for chromatic aberration caused by the Fresnel lens. A method for imaging light with the optical assembly is also disclosed.
Claims1
An optical assembly, comprising:
- a Fresnel lens including a high-refractive-index material having a refractive index greater than or equal to 1.9;
- and
- a diffractive optical element optically coupled with the Fresnel lens, wherein the diffractive optical element compensates for chromatic aberration caused by the Fresnel lens.
Dependencies are inferred from the claim text.