1986-03-17
1987-05-05
Sikes, William L.
350 361, 350 9634, G02B 610, G03H 102
Patent
active
046627111
ABSTRACT:
A method of making a holographic light guide comprising, in sequence, a substrate, a light guiding layer and a holographic recording layer that partially replaces the light guiding layer is disclosed. The substrate is made of a first bismuth sillenite group substance. The light guiding layer is made of a second bismuth sillenite group substance that has a higher refractive index than the first bismuth sillenite group substance and absorbs little of the light being guided. The holographic recording layer is made of a third bismuth sillenite group substance that has a higher refractive index than the first bismuth sillenite group substance and has a degree of photosensitivity.
REFERENCES:
patent: 4120569 (1978-10-01), Richards, Jr.
patent: 4138189 (1979-02-01), Huignard et al.
patent: 4400616 (1983-08-01), Chevillat et al.
Wuthrich et al., Applied Physics, vol. 21, No. 1, Jan. 1980, "Holography with Guided Optical Waves", pp. 55-64.
Verber et al., Conference Proc. of the Society of Photo-Optical Instrumentation Engineers, Wash., D.C., 7-18 Apr. 1979, "Proposed Smart . . . ", pp. 204-209.
Petrov et al., SPIE Proc. Soc. Photo-Opt. Instrum. Eng. (USA), 1979, "Holographic Writing and Image Processing in Bi.sub.12 SiO.sub.20 Crystals", pp. 44-49.
Sato et al., Applied Optics, vol. 22, No. 6, Mar. 1983, "Coherent Optical Image Delay Device Using a BSO . . . ", pp. 815-818.
Kuhara Yoshiki
Tada Koji
Gonzalez Frank
Sikes William L.
Sumitomo Electric Industries Ltd.
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