Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Patent
1996-10-07
1999-01-12
Spyrou, Cassandra C.
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
359 11, 359 4, 359 7, G03H 110, G03H 112, G03H 102
Patent
active
058597131
ABSTRACT:
Image derogating optical noise due to light scattering of an object under examination, embedded in a light scattering medium, is substantially reduced by passing a modulated signal laser beam through the scattering medium, and interfering the emerging signal with a coherent modulated reference beam to produce a hologram in a photorefractive member of the object, which in turn is read out of the crystal by a third unmodulated coherent beam to retrieve a clear image of the object. A smart pixel image convertor light valve may be substituted for the photorefractive member.
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patent: 5535024 (1996-07-01), Khoury et al.
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patent: 5557431 (1996-09-01), Pepper
A. J. Decker et al, "Electronic heterodyne recording and processing of optical holograms using phase modulatred referenc waves", Applied Optics, vol. 17, No. 6, Mar. 15, 1978, vol. 17, No. 6, pp. 917-921 (359/11).
G. Papi et al., "Imaging through aberrating media by means of phase-modulated reference beam", Conference: Applications of Holography and Optical Data Processing, Jerusalen, Isreal, Aug. 23-26, 1976, pp. 685-695 (359/11).
Leary, M.A.; et al., "Refraction of Diffuse Photon Density Waves," Physical Review Letter, vol. 69, No. 18, 2 Nov. 92, 2658-2661.
Hemmer Philip
Kane Jonathan
Khoury Jehad
Woods Charles L.
Chang Audrey
Nathans Robert L.
Spyrou Cassandra C.
The United States of America as represented by the Secretary of
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