US 12,001,028 B2 · Speckle-suppressing lighting system

Abstract

A speckle-suppressing lighting system includes an optical waveguide, a first solid-state light source, a second solid-state light source, and a diffuser. The optical waveguide has a proximal end and a distal end. At least part of the diffuser is between the proximal end and the distal end. The first solid-state light source is optically coupled to the optical waveguide near the proximal end, and emits a first light beam that propagates toward the distal end and has a first center wavelength. The second solid-state light source is optically coupled to the optical waveguide near the proximal end, and emits a second light beam that propagates toward the distal end and has a second center wavelength differing from the first center wavelength. The diffuser diffuses the first light beam and the second light beam.

Claims14

Dependent claims

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.

3 more elements

A speckle-suppressing lighting system comprising:

an optical waveguide that (i) has a proximal end and a distal end that includes a distal surface of the optical waveguide and (ii) is hollow and includes an inner lateral-surface that spans between the proximal end and the distal end, and defines an aperture in the proximal end and the distal end;
a reflective coating on the inner lateral-surface;
a total-internal-reflection lens on the distal surface;
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;
and
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.

4 more elements

Dependencies are inferred from the claim text.

Speckle-suppressing lighting system

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Speckle-suppressing lighting system

Life of this patent

Abstract

Claims14