US 11,668,929 B2
Achromatic optical lens assembly having Pancharatnam Berry Phase lens
Babak Amirsolaimani, Redmond, WA (US); Brian Wheelwright, Sammamish, WA (US); Yusufu Njoni Bamaxam Sulai, Snohomish, WA (US); Weichuan Gao, Redmond, WA (US); Fenglin Peng, Redmond, WA (US); and Ying Geng, Bellevue, 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. 21, 2020, as Appl. No. 16/854,851.
Claims priority of provisional application 62/840,164, filed on Apr. 29, 2019.
Prior Publication US 2020/0341268 A1, Oct. 29, 2020
Int. Cl. G02B 27/01 (2006.01); G02B 9/10 (2006.01); G02B 27/00 (2006.01); G02B 5/30 (2006.01); G02B 27/09 (2006.01); G02B 5/08 (2006.01)
CPC G02B 27/0025 (2013.01) [G02B 5/08 (2013.01); G02B 5/3025 (2013.01); G02B 5/3083 (2013.01); G02B 27/0983 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical lens assembly, comprising:
an optical lens; and
a Pancharatnam Berry Phase (“PBP”) element coupled to the optical lens, and configured to provide chromatic aberration correction for the optical lens,
wherein an Abbe number of the PBP element and an Abbe number of the optical lens have opposite signs, and
wherein the optical lens includes:
a first optical element;
a second optical element coupled with the first optical element;
a mirror disposed at a surface of the first optical element;
a reflective polarizer disposed at a surface of the second optical element; and
a waveplate disposed between the mirror and the reflective polarizer.