US 12,147,039 B2
Freeform lens with integrated lightguide and method of manufacture
Ozan Cakmakci, Sunnyvale, CA (US); Omar David Negrete, San Francisco, CA (US); and Yi Qin, Mountain View, CA (US)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Filed by GOOGLE LLC, Mountain View, CA (US)
Filed on May 11, 2021, as Appl. No. 17/317,105.
Claims priority of provisional application 63/030,578, filed on May 27, 2020.
Prior Publication US 2022/0269081 A1, Aug. 25, 2022
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02C 7/02 (2006.01); G02C 11/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0013 (2013.01); G02B 6/0033 (2013.01); G02B 6/0065 (2013.01); G02C 7/02 (2013.01); G02C 11/10 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A head mounted display (HMD) device comprising:
a frame housing a micro-display to project display light;
a lightguide configured to receive the display light from the micro-display, the lightguide further configured to have a first surface and a second surface opposing each other, the first surface exposed to a world-side environment and having a radius of curvature based on an ophthalmic corrective prescription, wherein the second surface is an eye-side surface having an outcoupler feature formed thereon; and
a corrective layer having a world-side surface coupled to the second surface of the lightguide,
wherein the coupled lightguide and corrective layer form a lens configured to fit within the frame.