US 12,332,481 B2
Biased total thickness variations in waveguide display substrates
Samarth Bhargava, Saratoga, CA (US); Christophe Peroz, Tokyo (JP); and Victor Kai Liu, Mountain View, CA (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Nov. 9, 2023, as Appl. No. 18/505,762.
Application 18/505,762 is a continuation of application No. 17/938,869, filed on Oct. 7, 2022, granted, now 11,860,416.
Application 17/938,869 is a continuation of application No. 17/308,407, filed on May 5, 2021, granted, now 11,487,061, issued on Nov. 1, 2022.
Application 17/308,407 is a continuation of application No. 16/792,083, filed on Feb. 14, 2020, granted, now 11,022,753, issued on Jun. 1, 2021.
Claims priority of provisional application 62/820,769, filed on Mar. 19, 2019.
Claims priority of provisional application 62/805,832, filed on Feb. 14, 2019.
Prior Publication US 2024/0077676 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 6/10 (2006.01); F21V 8/00 (2006.01); G02B 6/122 (2006.01); G02B 6/13 (2006.01); G02B 26/08 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/13 (2013.01) [G02B 6/0046 (2013.01); G02B 6/122 (2013.01); G02B 6/1221 (2013.01); G02B 26/0891 (2013.01); G02B 2006/12038 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12069 (2013.01); G02B 2006/12197 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A waveguide display substrate comprising:
a cylindrical portion having a planar surface;
a curved portion opposite the planar surface, defining a nonlinear change in thickness across the substrate; and
a wedge portion between the cylindrical portion and the curved portion, defining a linear change in thickness across the substrate, wherein a range of a dome height of the curved portion is between 700 nm and 1300 nm, and a maximum height of the wedge portion is less than 300 nm.