US 12,704,723 B1 · Homogenous light intensity output from a waveguide combiner

Abstract

Techniques for an optical waveguide with homogenous light intensity output are described herein. In an example, an optical waveguide system includes an optical waveguide substrate and a first holographic layer coupled to the optical waveguide substrate and configured to inject light into the optical waveguide substrate as injected light. The optical waveguide system also includes a second holographic layer coupled to the optical waveguide substrate and configured to receive the injected light and output the injected light as output lights in a direction. The second holographic layer is characterized by a varying diffraction efficiency and the output lights have a homogenous intensity at a distance from the second holographic layer.

Claims17

Dependent claims

An optical waveguide system comprising:

an optical waveguide substrate characterized by a maximum diffraction efficiency;
a first holographic layer coupled to the optical waveguide substrate and configured to inject light into the optical waveguide substrate;
and
a second holographic layer coupled to the optical waveguide substrate and configured to receive the light and output first light rays in a first direction,
wherein:
the second holographic layer includes extraction sites,
the second holographic layer is characterized by a varying diffraction efficiency,
the varying diffraction efficiency at an extraction site of the extraction sites is different from the maximum diffraction efficiency of the optical waveguide substrate and is defined as a function of the maximum diffraction efficiency, and
the first light rays have a homogenous intensity at a first distance from the second holographic layer.

6 more elements

An apparatus comprising:

a light source configured to emit light;
and
an optical waveguide system that is characterized by a maximum diffraction efficiency and that comprises:
an optical waveguide substrate;
a first holographic layer coupled to the optical waveguide substrate and configured to inject the light into the optical waveguide substrate;
and
a second holographic layer coupled to the optical waveguide substrate and configured to receive the light and output first lights rays in a first direction,
wherein:
the second holographic layer includes extraction sites,
the second holographic layer is characterized by a varying diffraction efficiency,
the varying diffraction efficiency at an extraction site of the extraction sites is different from the maximum diffraction efficiency of the optical waveguide substrate and is defined as a function of the maximum diffraction efficiency, and
the first light rays have a homogenous intensity at a first distance from the second holographic layer.

9 more elements

Dependencies are inferred from the claim text.

Homogenous light intensity output from a waveguide combiner

Life of this patent

Homogenous light intensity output from a waveguide combiner

Life of this patent

Abstract

Claims17