Low-aberration optical window
AssigneeRaytheon Company
InventorsRobert W. Byren, Vijay Murgai, Vladimir V. Shkunov, Michael Ushinsky
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Abstract
An optical window may be configured to minimize optical aberrations. The optical window may include a laminous optical window assembly. The laminous optical window assembly may have four or more alternating layers of positive refraction material layers and negative refraction material layers. The four or more alternating layers may be configured to minimize refraction of electromagnetic rays propagating therethrough such that a given incident electromagnetic ray is substantially collinear with a corresponding transmitted electromagnetic ray.
Claims22
An optical window configured to minimize optical aberrations, the optical window comprising:
- a laminous optical window assembly having four or more alternating layers of positive refraction material layers and negative refraction material layers, the four or more alternating layers configured to minimize refraction of electromagnetic rays propagating therethrough such that a given incident electromagnetic ray is substantially collinear with a corresponding transmitted electromagnetic ray, the negative refraction material layers including a positive index of refraction material that exhibits negative refraction for electromagnetic rays incident at one or more angles of incidence.
A system comprising:
- an optical device configured to receive and/or transmit electromagnetic energy;
- and
- an optical window configured to house the optical device and to minimize refraction of electromagnetic energy propagating therethrough such that a given incident electromagnetic ray is substantially collinear with a corresponding transmitted electromagnetic ray that is received by the optical device, the optical window including a laminous optical window assembly having four or more alternating layers of positive refraction material layers and negative refraction material layers, wherein a total number of layers included in the laminous optical window assembly depends on one or more of a shape or curvature of the laminous optical window assembly, an aperture size of the optical device, or structural requirements of the laminous optical window assembly.
A laminous optical window assembly configured to minimize optical aberrations and comprising:
- four or more alternating layers of positive refraction material layers and negative refraction material layers, the four or more alternating layers configured to minimize refraction of electromagnetic rays propagating therethrough such that a given incident electromagnetic ray is substantially collinear with a corresponding transmitted electromagnetic ray, the laminous optical window assembly including an even number of positive refraction material layers and an odd number of negative refraction material layers.
Dependencies are inferred from the claim text.