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US 2020/0348527 A1Published application
Pancake lens assembly and optical system thereof
AssigneeMeta Platforms Technologies, LLC
InventorsAfsoon JAMALI, Brian WHEELWRIGHT, Yang ZHAO, Yusufu Njoni Bamaxam SULAI, Douglas Robert LANMAN
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Abstract
An optical lens assembly and an optical system is provided. The optical lens assembly includes a first optical element including a partial reflector and a quarter-wave plate and a second optical element including a reflective polarizer. The first optical element and the second optical element form a cavity. The pancake lens assembly further includes a varifocal lens having an adjustable optical power, and the varifocal lens is disposed inside or outside the cavity.
Claims20
An optical lens assembly, comprising:
- a first optical element including a partial reflector and a quarter-wave plate;
- a second optical element including a reflective polarizer;
- and
- a varifocal lens having an adjustable optical power,
- wherein the first optical element and the second optical element form a cavity, and
- the varifocal lens is disposed inside or outside the cavity.
3 more elements
An optical system, comprising:
- a light source;
- a first optical element including a partial reflector and a quarter-wave plate;
- a second optical element including a reflective polarizer;
- a varifocal lens having an adjustable optical power;
- and
- a detector;
- wherein the first optical element and the second optical element form a cavity,
- the varifocal lens is disposed inside or outside the cavity, and
- the first optical element, the second first optical element and the varifocal lens are configured to direct a light from the light source to the detector.
6 more elements
Dependencies are inferred from the claim text.