US 12,013,561 B2
Waveguide device incorporating a light pipe
Milan Momcilo Popovich, Leicester (GB); Jonathan David Waldern, Diablo, CA (US); and Alastair John Grant, San Jose, CA (US)
Assigned to DigiLens Inc., Sunnyvale, CA (US)
Filed by DigiLens Inc., Sunnyvale, CA (US)
Filed on Nov. 8, 2021, as Appl. No. 17/454,007.
Application 17/454,007 is a continuation of application No. 16/664,665, filed on Oct. 25, 2019, granted, now 11,169,314.
Application 16/664,665 is a continuation of application No. 15/558,409, granted, now 10,459,145, issued on Oct. 29, 2019, previously published as PCT/GB2016/000051, filed on Mar. 15, 2016.
Claims priority of provisional application 62/177,494, filed on Mar. 16, 2015.
Prior Publication US 2022/0128754 A1, Apr. 28, 2022
Int. Cl. G02B 6/28 (2006.01); F21V 8/00 (2006.01); G02B 6/00 (2006.01); G02B 27/01 (2006.01); G02F 1/1334 (2006.01)
CPC G02B 6/0028 (2013.01) [G02B 6/0016 (2013.01); G02B 6/0026 (2013.01); G02B 6/0031 (2013.01); G02B 6/0035 (2013.01); G02B 27/0101 (2013.01); G02B 27/0103 (2013.01); G02F 1/13342 (2013.01); G02B 2027/0125 (2013.01); G02F 2201/307 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A waveguide device comprising:
a light source emitting first wavelength light and second wavelength light;
a light guide device comprising a light pipe having a set of one or more reflecting surfaces disposed around an optical axis configured to guide light from a first end along a spiral-like total internal reflection path therethrough to a second end;
a light coupling element in optical contact with an elongate portion of a reflecting surface of the set of said reflecting surfaces; and
an optical waveguide in optical contact with said light coupling element, wherein the optical waveguide includes:
a first grating configuration comprising at least one grating for beam expanding and extracting said first wavelength light from said waveguide; and
a second grating configuration comprising at least one grating for beam expanding and extracting said second wavelength light from said waveguide,
wherein said light coupling element is configured to extract at least a portion of said light guided through said light pipe along the reflecting surface in optical contact with said light coupling element such that the extracted light is coupled into said optical waveguide and propagates along a path of total internal reflection within said optical waveguide, wherein said set of reflecting surfaces comprises abutting mutually inclined elongate elements, at least one said elongate element in optical contact with said light coupling element.