US 9,810,904 B1
Fresnel lens assembly having varying facet angle
Serge Bierhuizen, Mountain View, CA (US); Xinda Hu, Mountain View, CA (US); and Jerome Carollo, Mountain View, CA (US)
Assigned to Google Inc., Mountain View, CA (US)
Filed by Google Inc., Mountain View, CA (US)
Filed on Dec. 19, 2016, as Appl. No. 15/383,219.
Claims priority of provisional application 62/420,942, filed on Nov. 11, 2016.
Int. Cl. G03B 21/60 (2014.01); G02B 27/00 (2006.01); G02B 5/04 (2006.01); H04N 13/04 (2006.01)
CPC G02B 27/0025 (2013.01) [G02B 5/04 (2013.01); H04N 13/044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a lens assembly comprising a lens body having a first surface defining Fresnel prisms; and
wherein a Fresnel prism of the Fresnel prisms has a first facet angle when viewed in a first cross-section and has a second facet angle when viewed in a second cross-section parallel to the first cross-section, the first facet angle different than the second facet angle.