US 12,001,030 B1
Shadow-matched Fresnel lens doublet for reduced optical artifacts
Brian Wheelwright, Sammamish, WA (US); and Jacques Gollier, Sammamish, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on Sep. 27, 2022, as Appl. No. 17/954,237.
Application 17/954,237 is a continuation of application No. 16/780,731, filed on Feb. 3, 2020, granted, now 11,454,747.
Claims priority of provisional application 62/804,141, filed on Feb. 11, 2019.
Int. Cl. G02B 3/08 (2006.01); G02B 3/10 (2006.01)
CPC G02B 3/10 (2013.01) 19 Claims
OG exemplary drawing
 
1. A lens assembly, comprising:
a first lens having (i) a first convex lens surface and (ii) a first concave lens surface that is opposite to the first convex lens surface and includes a first plurality of Fresnel structures; and
a second lens having (iii) a second convex lens surface and (iv) a second concave lens surface opposite to the second convex lens surface, wherein the first concave lens surface faces the second lens and is separated from the second convex lens surface by a distance that varies across the first concave lens surface and the first convex lens surface is a smooth surface and the second concave lens surface is a smooth surface.