US 12,189,134 B2
Compact beam expander for VR/AR headsets
Wai Sze Tiffany Lam, Lynnwood, WA (US); Jian Xu, Redmond, WA (US); and Wanli Chi, 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 Dec. 6, 2022, as Appl. No. 18/062,533.
Claims priority of provisional application 63/359,652, filed on Jul. 8, 2022.
Prior Publication US 2024/0012261 A1, Jan. 11, 2024
Int. Cl. G02B 27/09 (2006.01); G02B 5/18 (2006.01); G02B 5/32 (2006.01); G02F 1/1335 (2006.01)
CPC G02B 27/0944 (2013.01) [G02B 5/1847 (2013.01); G02B 5/32 (2013.01); G02F 1/133504 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device, including:
a first optical element configured to receive a collimated beam input and to provide a first expanded beam in a first direction;
a second optical element configured to receive the first expanded beam in the first direction and to provide a second expanded beam in a second direction to a display for an enhanced reality headset; and
a phase plate layer configured to separate the collimated beam input into a plurality of light beams based on color, wherein the plurality of light beams are in a same direction and are directed into different portions of the display, and the phase plate layer is included in at least one of the first optical element or the second optical element.