US 12,007,596 B2
Light-guide optical element employing complementary coated partial reflectors, and light-guide optical element having reduced light scattering
Yochay Danziger, Kfar Vradim (IL); and Elad Sharlin, Mishmar David (IL)
Assigned to LUMUS LTD., Ness Ziona (IL)
Filed by Lumus Ltd., Ness Ziona (IL)
Filed on Jul. 6, 2023, as Appl. No. 18/218,624.
Application 18/218,624 is a continuation of application No. 18/085,640, filed on Dec. 21, 2022, granted, now 11,714,223.
Application 18/085,640 is a continuation of application No. 17/768,983, granted, now 11,561,335, issued on Jan. 24, 2023, previously published as PCT/IL2020/051249, filed on Dec. 3, 2020.
Claims priority of provisional application 62/943,867, filed on Dec. 5, 2019.
Prior Publication US 2023/0350125 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 8/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 6/0035 (2013.01) [G02B 6/0011 (2013.01); G02B 27/0172 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical device, comprising:
a light-transmitting substrate having at least a first pair of parallel major external surfaces for guiding light indicative of a collimated image by internal reflection at the major external surfaces;
at least one internal surface deployed within the substrate, the internal surface having an end region associated with a first of the major external surfaces of the first pair of major external surfaces defining an interface region between the internal surface and the substrate; and
an amount of a light absorbing material located at the interface region.