Extremely Narrowband and Cascaded Holographic Adjustable Range Tunable (ENCHART) Filter.
Final rept. 8 Nov 94-8 Aug 95,
PHYSICAL OPTICS CORP TORRANCE CA
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In Phase I, Physical Optics Corporations RD Division POC designed and developed a new Extremely Narrowband Cascaded Holographic Adjustable Range Tunable ENCHART filter using two holographic Fabry Perot filters HFPFs a coarse filter to select the desired portion of the optical range, and an extremely narrow 0.1 A bandwidth fine filter operating within this selected range at any arbitrary wavelength. The fine filter is an electrically tuned liquid crystal cell. All established objectives were exceeded and a proof of concept ENCHART prototype was fabricated. This technology was extended to and demonstrated in the violet blue region of the spectrum.