US 11,740,446 B2
Optical system for head-mounted display
Sajjad A. Khan, Santa Clara, CA (US); Nan Zhu, San Jose, CA (US); Graham B. Myhre, Campbell, CA (US); Brent J. Bollman, Alameda, CA (US); Tyler Anderson, Sunnyvale, CA (US); Weibo Cheng, Santa Clara, CA (US); and John N. Border, Campbell, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 15, 2021, as Appl. No. 17/150,919.
Application 17/150,919 is a continuation of application No. 16/776,750, filed on Jan. 30, 2020, granted, now 10,928,613.
Application 16/776,750 is a continuation of application No. 16/224,561, filed on Dec. 18, 2018, granted, now 10,591,707, issued on Mar. 17, 2020.
Application 16/224,561 is a continuation of application No. 15/434,623, filed on Feb. 16, 2017, granted, now 10,203,489, issued on Feb. 12, 2019.
Claims priority of provisional application 62/383,911, filed on Sep. 6, 2016.
Claims priority of provisional application 62/370,170, filed on Aug. 2, 2016.
Prior Publication US 2021/0132349 A1, May 6, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 17/00 (2006.01); G02B 17/08 (2006.01); G02B 27/28 (2006.01); G02B 27/01 (2006.01); G02B 27/00 (2006.01); G09G 3/00 (2006.01)
CPC G02B 17/0856 (2013.01) [G02B 27/0018 (2013.01); G02B 27/0172 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01); G09G 3/003 (2013.01); G02B 2027/0138 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A head-mounted display, comprising:
an array of pixels configured to produce light;
a first linear polarizer through which the light passes;
a first quarter wave plate that receives the light from the first linear polarizer;
a first lens element having a first surface that is convex and having an opposing second surface;
a partially reflecting mirror on the first surface;
a second quarter wave plate at the second surface;
a second lens element having a third surface at the second quarter wave plate and an opposing fourth surface that is concave;
a reflective polarizer at the fourth surface;
a third lens element having a fifth surface and opposing sixth surface, wherein the second lens element is interposed between the first and third lens elements; and
a second linear polarizer that is interposed between the second and third lens elements.