US 12,147,046 B2
Optical assembly with holographic optics for folded optical path
Andrew Maimone, Duvall, WA (US); Junren Wang, Kirkland, WA (US); and Barry David Silverstein, 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 Aug. 23, 2022, as Appl. No. 17/894,052.
Application 17/894,052 is a continuation of application No. 16/784,718, filed on Feb. 7, 2020, granted, now 11,422,373.
Application 16/784,718 is a continuation of application No. 16/782,604, filed on Feb. 5, 2020, granted, now 11,360,308, issued on Jun. 14, 2022.
Claims priority of provisional application 62/964,564, filed on Jan. 22, 2020.
Prior Publication US 2023/0098118 A1, Mar. 30, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 5/18 (2006.01); G02B 5/32 (2006.01); G02B 17/00 (2006.01); G02B 27/00 (2006.01); G02B 27/02 (2006.01); G02B 27/10 (2006.01); G02B 27/14 (2006.01); G02B 27/28 (2006.01); G02B 27/48 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 5/1842 (2013.01); G02B 5/32 (2013.01); G02B 17/004 (2013.01); G02B 27/0093 (2013.01); G02B 27/026 (2013.01); G02B 27/1006 (2013.01); G02B 27/1086 (2013.01); G02B 27/14 (2013.01); G02B 27/285 (2013.01); G02B 27/48 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical system, comprising:
an optical device including:
a first partial reflector; and
a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light, wherein:
at least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector; and
at least one of the first partial reflector or the second partial reflector comprises a reflective holographic element; and
a display device, wherein the first partial reflector receives light emitted from a display panel of the display device and at least one of the following is satisfied:
the display panel is configured to provide, at a first location on the display panel, light having a first emission cone characterized by a first emission cone angle and provide, at a second location on the display panel that is distinct from the first location, light having a second emission cone characterized by a second emission cone angle that is distinct from the first emission cone angle; or
central rays of emission cones from the display panel intersect a common point in front of or behind the display panel.