Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1992-10-23
1994-08-02
Sikes, William L.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 1, 359 15, 359 22, G02B 532, G03H 118, G03H 126
Patent
active
053350987
ABSTRACT:
An improved method for storing permanent holographic gratings in photorefractive materials for use in narrow band filters such as the H.sub.60 filter, as well as the filters themselves. The invention also provides an improved method of controlling the electric field and the nature of the photorefraction to minimize wavelength shifts and band broadening at a minimal reduction of diffraction efficiency.
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Leyva Victor
Rakuljic George A.
Accuwave Corporation
Parsons David R.
Sikes William L.
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