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US 2020/0150324 A1Published application
High-efficiency wide-angle beam steering system
AssigneeBeam Engineering for Advanced Measurements Co.
InventorsNelson Tabirian, David E. Roberts, Sarik Nersisyan, Olena Uskova, Anna Tabirian
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Abstract
Optical beam steering and focusing systems, devices, and methods that utilize diffractive waveplates are improved to produce high efficiency at large beam deflection angles, particularly around normal incidence, by diffractive waveplate architectures comprising a special combination of liquid crystal polymer diffractive waveplate both layers with internal twisted structure and at a layer with uniform structure.
Claims11
A beam steering system comprising:
- an optical assembly that includes at least one cycloidal diffractive waveplate, each cycloidal diffractive waveplate having three functional layers, in all of which an optical anisotropy axis is parallel to a surface of the cycloidal diffractive waveplate;
- in outer two layers of at least one cycloidal diffractive waveplate, the optical anisotropy axis has an orientation varying linearly with position in a direction perpendicular to the surface of the cycloidal diffractive waveplate;
- in an inner layer of at least one cycloidal diffractive waveplate, the optical anisotropy axis orientation having no variation with position in the direction perpendicular to the surface of the cycloidal diffractive waveplate;
- a twist angle of the optical anisotropy axis orientation in one of the two outer layers of at least one cycloidal diffractive waveplate being equal in magnitude and opposite in sign to the twist angle of the optical anisotropy axis orientation of the other outer layer of the cycloidal diffractive waveplate;
- and
- a controller assembly configured and arranged such that propagation direction of a beam of optical radiation traversing the optical assembly is changed by a selected angle.
3 more elements
An optical lens system comprising:
- at least one diffractive waveplate lens having three functional layers, in all of which an optical anisotropy axis is parallel to a surface of the at least one diffractive waveplate lens
- in outer two layers of the at least one of the diffractive waveplate lenses, the optical anisotropy axis orientation varying linearly with position in a direction perpendicular to a surface of the diffractive waveplate lens;
- in an inner layer of the at least one diffractive waveplate lens, the optical anisotropy axis orientation having no variation with position in a direction perpendicular to a surface of the at least one diffractive waveplate lens;
- a twist angle of the optical anisotropy axis orientation in one of the two outer layers of the at least one of the diffractive waveplate lenses being equal in magnitude and opposite in sign to a twist angle of the optical anisotropy axis orientation of the other outer layer of the at least one diffractive waveplate lens.
1 more element
Dependencies are inferred from the claim text.