Radiation imagery chemistry: process – composition – or product th – Holographic process – composition – or product
Patent
1996-09-10
1998-04-28
Angebranndt, Martin
Radiation imagery chemistry: process, composition, or product th
Holographic process, composition, or product
430 2, 430290, 375 4, 359 4, G03H 104, G03C 172
Patent
active
057442673
ABSTRACT:
A photorefractive (PR) device comprises of a layer of a novel photorefractive polymer composite sandwiched inbetween two transparent electrodes. The PR polymer composite comprises a photoconducting polymer, a photosensitizer, a novel second-order, non-linear optical chromophore, and a plasticizer in an amount sufficient to provide the PR polymer composite with a glass transition temperature below about 45.degree. C. The PR polymer composite is capable of internally storing image patterns generated by interfering two coherent light beams inside the material. The PR polymer composite shows high diffraction efficiencies (near 100%) and high net two-coupling gain (>200 cm.sup.-1). The writing of information is reversible. Consequently, the device is suitable for read/write holographic storage and real-time image processing applications, and is capable of being poled at essentially room temperature. The light source is an integrated semiconductor laser and the detector is a commercial Si photodiode or a CCD camera.
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Hall, Jr. Henry K.
Kippelen Bernard
Lyon Scott R.
Meerholz Klaus
Padias Anne B.
Angebranndt Martin
Arizona Board of Regents acting for and on behalf of University
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