US 11,880,113 B2
Varifocal system using hybrid tunable liquid crystal lenses
Lu Lu, Kirkland, WA (US); Fenglin Peng, Redmond, WA (US); and Douglas Robert Lanman, Bellevue, WA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on May 3, 2022, as Appl. No. 17/736,085.
Application 17/736,085 is a continuation of application No. 16/271,344, filed on Feb. 8, 2019, granted, now 11,353,767.
Claims priority of provisional application 62/712,001, filed on Jul. 30, 2018.
Prior Publication US 2022/0260887 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/29 (2006.01); G02B 30/36 (2020.01)
CPC G02F 1/29 (2013.01) [G02B 30/36 (2020.01); G02F 1/294 (2021.01)] 10 Claims
OG exemplary drawing
1. A device, comprising:
a first-type liquid crystal (LC) lens configured to provide a first optical power that is variable in a first step resolution;
a second-type LC lens coupled with the first-type LC lens, and configured to provide a second optical power that is variable in a second step resolution; and
a linear-to-circular polarization converter disposed between the first-type LC lens and the second-type LC lens,
wherein the linear-to-circular polarization converter is configured to convert a linearly polarized light output from the first-type LC lens into a circularly polarized light propagating toward the second-type LC lens,
wherein the first step resolution is smaller than the second step resolution, and
wherein a total optical power of the device is a sum of the first optical power and the second optical power, and is variable in the first step resolution.