Invention Grant
- Patent Title: Polarization scene projector
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Application No.: US16268980Application Date: 2019-02-06
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Publication No.: US10656497B1Publication Date: 2020-05-19
- Inventor: Joshua Lentz
- Applicant: Government of the United States, as represented by the Secretary of the Air Force
- Applicant Address: US OH Wright-Patterson AFB
- Assignee: The Government of the United States as Represented by the Secretary of the Air Force
- Current Assignee: The Government of the United States as Represented by the Secretary of the Air Force
- Current Assignee Address: US OH Wright-Patterson AFB
- Agency: AFMCLO/JAZ
- Main IPC: G02F1/29
- IPC: G02F1/29 ; G03B21/20

Abstract:
A scene projector includes a first cycloidal diffractive waveplate (CDW) having first pixels that are switchable such that light from a zero order passes through along an optical axis and light from plus and minus first orders is deflected away from the optical axis, and a second CDW downstream of the first CDW that includes second pixels positioned to receive diffracted orders of light from the first CDW, where there are at least three second pixels for one first pixel corresponding to each diffracted order received from the first pixel. The scene projector may further include a first reflective surface and a second reflective surface each positioned to receive diffracted orders of light from the second CDW, where each reflective surface directs light toward a grating structure. The scene projector may independently control a degree of polarization, angle of linear polarization, and intensity for light output therefrom.
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