Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1992-09-28
1995-01-17
Sugarman, Scott J.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
359559, 359757, 359785, 356 71, G02B 2746
Patent
active
053830563
ABSTRACT:
A Fourier transform lens assembly suited for use in an optical information processor includes a first lens group having a positive power, a second lens group having a negative power disposed on one side of the first lens group, and a third lens group having a positive power disposed on the side opposite to the first lens group with respect to the second lens group. The distance between a front focal plane and a back focal plane of the Fourier transform lens assembly is less than two times a focal length of the Fourier transform lens assembly.
REFERENCES:
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patent: 4997250 (1991-03-01), Ortiz, Jr.
Abstract: Japan, Matsushita Electric Ind. Co. Ltd. Feb. 10, 1992 (Appl. Jun./1990), Patent Abstracts of Japan JP 404039690.
Abstract: Soviet, Mosc. Eng. Geodsky, MOEN, "Coherent Spectrum Analyser Fourier Lens" Apr. 1988, Derwent Publications, Ltd. London.
Abstract: Japan, Mitsubishi Denki et al., Apr. 22, 1983, Patent Abstracts of Japan vol. 7, No. 96 (P-193) & JP-A-58-21716.
Fukui Atsushi
Ito Masami
Nishii Kanji
Jr. John Juba
Matsushita Electric - Industrial Co., Ltd.
Sugarman Scott J.
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