1979-09-24
1982-10-26
Lee, John D.
350 380, G02B 532
Patent
active
043558585
ABSTRACT:
A hologram lens capable of converting an output beam of light emitted from a semiconductor to a reconstruction light suitable for reconstructing holograms is prepared by use of the object light, which resembles a beam of light emitted divergently from a semiconductor laser for reconstructing holograms and which travels, in the opposite direction to the travelling direction of the beam of light from the semiconductor laser, in such a manner as to converge on a light emitting portion of the semiconductor laser, and the reference light which is an isotropic beam with a circular cross section. The object light is obtained by use of an optical system capable of converting an output beam emitted from semiconductor lasers to an isotropic beam of light with a circular cross section when the output beam of light is caused to pass through the optical system from its input side Lin to its output side Lout, and by causing an isotropic beam of light with a circular cross section to pass through the optical system from the output side Lout to the input side Lin.
REFERENCES:
patent: 4054356 (1977-10-01), Noguchi
patent: 4133600 (1979-01-01), Russell et al.
patent: 4306763 (1981-12-01), Huignard
Sincerbox, "Formation of Optical Elements by Holography", IBM Tech. Discl. Bull., vol. 10, No. 3, Aug. 1967, pp. 267-268.
Bykovskii et al., "Coherence of the Radiation Emitted by . . . ", Sov. Phys. Semiconductors, vol. 4, No. 5, Nov. 1970, pp. 819-821.
Minami et al., "Holographic Image Reconstruction With . . . ", Applied Optics, vol. 10, No. 7, Jul. 1971, pp. 1629-1631.
Richter et al., "Holographically Generated Lens", Applied Optics, vol. 13, No. 12, Dec. 1974, pp. 2924-2930.
Fukushima Yoshio
Funato Hiroyoshi
Lee John D.
Ricoh & Company, Ltd.
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