US 12,092,844 B2
Liquid lens with gravity sag correction
Andrew John Ouderkirk, Redmond, WA (US); Nagi Hosni Elabbasi, Southborough, MA (US); Spencer Allan Wells, Seattle, WA (US); Christopher Stipe, Woodinvill, WA (US); Kenneth Alexander Diest, Kirkland, WA (US); Christopher Yuan Ting Liao, Seattle, WA (US); Liliana Ruiz Diaz, Redmond, WA (US); Laura Cressman, Carnation, WA (US); Taha Masood, Sammamish, WA (US); and James Howard Thomas Ransley, Medford, MA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,921.
Prior Publication US 2022/0283340 A1, Sep. 8, 2022
Int. Cl. G02B 3/14 (2006.01)
CPC G02B 3/14 (2013.01) 15 Claims
OG exemplary drawing
 
1. A liquid lens comprising:
a substrate;
a transparent elastic membrane forming a cavity with the substrate; and
a transparent fluid filling the cavity between the substrate and the membrane;
wherein the membrane has a pre-distorted, rotationally asymmetric shape in absence of the fluid in the cavity such that, when the cavity is filled with the fluid and the substrate is disposed vertically with respect to gravity at a pre-defined clocking angle, the membrane adopts a substantially rotationally symmetric shape due to elasticity of the membrane counteracting the gravity exerting a downward force on the fluid in the cavity, wherein the membrane is formed on a surface having the rotationally asymmetric shape.