US 12,001,028 B2
Speckle-suppressing lighting system
Xiaoxin Wang, Hanover, NH (US); Charles J. Carver, Jr., Hanover, NH (US); Eric R. Fossum, Hanover, NH (US); Jifeng Liu, Hanover, NH (US); Xia Zhou, Hanover, NH (US); and Nicholas R. Shade, Hanover, NH (US)
Assigned to THE TRUSTEES OF DARTMOUTH COLLEGE, Hanover, NH (US)
Filed by THE TRUSTEES OF DARTMOUTH COLLEGE, Hanover, NH (US)
Filed on Sep. 26, 2022, as Appl. No. 17/953,129.
Claims priority of provisional application 63/247,949, filed on Sep. 24, 2021.
Prior Publication US 2023/0100241 A1, Mar. 30, 2023
Int. Cl. G02B 27/48 (2006.01); F21V 8/00 (2006.01)
CPC G02B 27/48 (2013.01) [G02B 6/0006 (2013.01); G02B 6/0008 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A speckle-suppressing lighting system comprising:
an optical waveguide having a proximal end, a distal end, and being a solid volume of material having a proximal base surface, a distal base surface, an outer lateral-surface therebetween;
a first solid-state light source, optically coupled to the optical waveguide near the proximal end, that emits a first light beam that propagates toward the distal end and has a first center wavelength;
a second solid-state light source, optically coupled to the optical waveguide near the proximal end, that emits a second light beam that propagates toward the distal end and has a second center wavelength differing from the first center wavelength;
a diffuser, at least part of which is between the proximal end and the distal end, that diffuses the first light beam and the second light beam; and
an interior-facing diffuse reflective coating on the outer lateral-surface.