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US 8,427,769 B1Granted
Multi-stage Lyot filter and method
AssigneeRaytheon Company
InventorRobert D. Stultz
Life of this patent
Estimating the term…
Abstract
According to an embodiment of the disclosure, a multi-stage Lyot filter comprises a plurality of prisms, a polarizing block, and a non-rotating, single-adjustment birefringent element. Each of the prisms is configured to receive light and to reflect the light. The polarizing block is configured to provide polarization discrimination of the light. The birefringent element is configured to tune the Lyot filter. The prisms are further configured to pass the light through the birefringent element multiple times.
Claims20
A multi-stage Lyot filter comprising:
- a plurality of prisms, wherein each of the prisms is configured to receive light and to reflect the light;
- a polarizing block configured to provide polarization discrimination of the light;
- and
- a non-rotating, single-adjustment birefringent element configured to tune the Lyot filter, wherein the prisms are further configured to pass the light through the birefringent element multiple times.
1 more element
An optical cavity comprising:
- a gain medium configured to provide optical gain for light in the optical cavity;
- a Q-switch configured to provide variable attenuation for the optical cavity;
- a reflector configured to partially reflect the light;
- and
- a multi-stage Lyot filter configured to pass a specified band of wavelengths of the light, wherein the Lyot filter comprises a non-rotating, single-adjustment birefringent element configured to tune the Lyot filter and multiple prisms configured to pass the light through the birefringent element multiple times.
2 more elements
A method comprising:
- receiving light at a multi-stage Lyot filter that comprises a non-rotating, single-adjustment birefringent element;
- passing the light through the birefringent element multiple times to generate filtered light;
- and
- providing the filtered light as an output of the Lyot filter.
1 more element
Dependencies are inferred from the claim text.