US 12,078,815 B1
Polarization volume hologram lens
Scott Charles McEldowney, Redmond, WA (US); Lu Lu, Kirkland, WA (US); and Babak Amirsolaimani, Redmond, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,601.
Application 17/524,601 is a continuation of application No. 16/224,762, filed on Dec. 18, 2018, granted, now 11,199,721.
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/28 (2006.01); G02B 3/10 (2006.01); G02B 5/30 (2006.01); G02B 5/32 (2006.01); G02B 27/01 (2006.01); G03H 1/02 (2006.01)
CPC G02B 27/286 (2013.01) [G02B 5/3016 (2013.01); G02B 5/3083 (2013.01); G02B 5/32 (2013.01); G02B 27/0172 (2013.01); G03H 1/0248 (2013.01); G02B 3/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lens, comprising:
optically anisotropic molecules arranged in helical structures, wherein:
the lens includes a first portion, a second portion located around the first portion, and a third portion located around the second portion;
the first portion includes optically anisotropic molecules arranged in a first helical structure having a first helical pitch along a first helical axis, within the first portion, parallel to an optical axis of the lens;
the second portion includes optically anisotropic molecules arranged in a second helical structure having a second helical pitch distinct, from the first helical pitch, along a second helical axis, within the second portion, parallel to the optical axis of the lens;
the third portion includes optically anisotropic molecules arranged in a third helical structure having a third helical pitch, distinct from the first helical pitch and the second helical pitch, along a third helical axis, within the third portion, parallel to the optical axis of the lens; and
the second helical pitch has a length that is between a length of the first helical pitch and a length of the third helical pitch.