US 12,078,806 B2
Angular performance of apochromatic Pancharatnam berry phase components using a C-plate
Wai Sze Tiffany Lam, Redmond, WA (US); and Lu Lu, Kirkland, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Apr. 4, 2022, as Appl. No. 17/712,894.
Application 17/712,894 is a continuation of application No. 16/006,701, filed on Jun. 12, 2018, granted, now 11,327,306, issued on May 10, 2022.
Claims priority of provisional application 62/643,691, filed on Mar. 15, 2018.
Prior Publication US 2022/0291510 A1, Sep. 15, 2022
Int. Cl. G02F 1/29 (2006.01); G02B 5/30 (2006.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01); G02B 27/28 (2006.01); G02B 27/42 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/139 (2006.01); G02F 1/1347 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 5/3016 (2013.01); G02B 27/0025 (2013.01); G02B 27/286 (2013.01); G02B 27/288 (2013.01); G02B 27/4261 (2013.01); G02F 1/133504 (2013.01); G02F 1/133526 (2013.01); G02F 1/133528 (2013.01); G02F 1/13363 (2013.01); G02F 1/1393 (2013.01); G02F 1/292 (2013.01); G02B 2027/011 (2013.01); G02B 2027/0116 (2013.01); G02B 2027/0174 (2013.01); G02F 1/133541 (2021.01); G02F 1/133638 (2021.01); G02F 1/1347 (2013.01); G02F 1/294 (2021.01); G02F 2203/05 (2013.01); G02F 2203/24 (2013.01); G02F 2413/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An optical system, comprising:
a geometric phase element that is aligned with an optical axis and configured to provide a plurality of focal lengths or a plurality of steering angles, a birefringence of the geometric phase element providing a first polarization phase shift to light incident on the geometric phase element off-axis from the optical axis; and
a C-plate adjacent to the geometric phase element and aligned with the optical axis, a birefringence of the C-plate providing a second polarization phase shift to the light, the second polarization phase shift depending, at least in part, on an angle with respect to the optical axis of the light incident on the C-plate.