US 12,253,672 B2
Light-guide optical element employing polarized internal reflectors
Yochay Danziger, Kfar Vradim (IL); and Daniel Michaels, Ramat Gan (IL)
Assigned to LUMUS LTD., Ness Ziona (IL)
Filed by Lumus Ltd., Ness Ziona (IL)
Filed on Jun. 13, 2024, as Appl. No. 18/742,121.
Application 18/742,121 is a continuation of application No. 17/882,897, filed on Aug. 8, 2022, abandoned.
Application 17/882,897 is a continuation of application No. 16/982,656, granted, now 11,409,103, issued on Aug. 9, 2022, previously published as PCT/IB2019/056057, filed on Jul. 16, 2019.
Claims priority of provisional application 62/698,300, filed on Jul. 16, 2018.
Prior Publication US 2024/0329395 A1, Oct. 3, 2024
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 5/30 (2006.01)
CPC G02B 27/0101 (2013.01) [G02B 5/3025 (2013.01); G02B 6/0015 (2013.01); G02B 6/0035 (2013.01); G02B 6/0056 (2013.01); G02B 27/0172 (2013.01); G02B 5/3058 (2013.01); G02B 2027/0118 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light-guide optical element comprising:
(a) a transparent substrate having at least two parallel major external surfaces for guiding light within the substrate by internal reflection at said external surfaces; and
(b) a plurality of mutually parallel internal surfaces deployed within said substrate non-parallel to said major external surfaces, at least part of each of said internal surfaces comprising a structural polarizer having a primary polarization transmission axis, said structural polarizer being substantially transparent to light polarized parallel to said primary polarization transmission axis and being at least partially reflective to light polarized perpendicular to said primary polarization transmission axis,
wherein a principal axis of each of said internal surfaces is defined as a direction parallel to said major external surfaces, and wherein said primary polarization transmission axis for at least a first of said internal surfaces is oriented obliquely to said principal axis and wherein said primary polarization transmission axis for at least a second of said internal surfaces is aligned parallel or orthogonal to said principal axis.