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US 12,656,574 B1Granted
Lens athermalization
AssigneeMeta Platforms Technologies, LLC
InventorsZhisheng Yun, Amber Sun, Allen Hsu Te Lun, Kee Siang Goh
Life of this patent
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Abstract
A fixed position athermal optical system includes a first lens having a negative refractive power, and a second lens having a positive refractive power, where a temperature coefficient of refractive index for the respective lens materials is configured to mitigate the effect of temperature changes on the operation and performance of the optical system.
Claims19
An optical system comprising:
- a substrate;
- a first lens disposed over a first surface of the substrate having a negative refractive power and a negative temperature coefficient of refractive index ranging from approximately −1*10−6/° C. to −2*10−4/° C.;
- and
- a second lens disposed over a second surface of the substrate having a positive refractive power and a positive temperature coefficient of refractive index ranging from approximately 1*10−7/° C. to 2*10−4/° C., wherein the first lens and the second lens each comprise a UV cured polymer and each lens is in contact with the substrate.
1 more element
An optical system comprising:
- a substrate;
- a first lens disposed over a first surface of the substrate having a negative refractive power and a negative temperature coefficient of refractive index ranging from at least −1*10−6/° C. to −2*10−4/° C.;
- and
- a second lens disposed over a second surface of the substrate having a positive refractive power and a negative temperature coefficient of refractive index ranging from at least −1*10−7/° C. to −2*10−4/° C., wherein:
- the first lens and the second lens each comprise a UV cured polymer and each lens is in contact with the substrate;
- and
- an absolute value of the temperature coefficient of refractive index of the first lens is greater than an absolute value of the temperature coefficient of refractive index of the second lens.
4 more elements
An optical system comprising:
- a substrate;
- a first lens disposed over a first surface of the substrate having a negative refractive power and a positive temperature coefficient of refractive index ranging from at least 1*10−6/° C. to 2*10−4/° C.;
- and
- a second lens disposed over a second surface of the substrate having a positive refractive power and a positive temperature coefficient of refractive index ranging from at least 1*10−7/° C. to 2*10−4/° C., wherein:
- the first lens and the second lens each comprise a UV cured polymer and each lens is in contact with the substrate;
- and
- the temperature coefficient of refractive index of the first lens is less than the temperature coefficient of refractive index of the second lens.
4 more elements
Dependencies are inferred from the claim text.