Lens system for photodetectors

Details Lens system for photodetectors Lens system for photodetectors

1999-02-16

2000-11-21

Evans, F. L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502141, G01J 314

Patent

active

061506532

ABSTRACT:
An photosensitive device may be formed with a diffractive lens which offsets chromatic aberrations and dispersion caused by a refractive capture lens. The diffractive lens may be formed of a sol-gel material having a photoinitiator, or other materials including those that may be defined with low temperature techniques commonly used in connection with photoresist.

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patent: 5623473 (1997-04-01), Ichihara
patent: 5796514 (1998-08-01), Chipper
NEC Corp., "Semiconductor Photodetecting Element," Patent Abstracts of Japan, vol. 014, No. 282 (E-0942), Jun. 19, 1990 and JP 02 090685 A, Mar. 30, 1990.
Mitsubishi Materials Corp., "Fresnel Lens and Its Production," Patent Abstracts of Japan, vol. 1996, No. 03, Mar. 29, 1996 and JP 07 306306 A Nov. 21, 1995.
Matsushita Electric Ind. Co. Ltd., "Optical Device," Patent Abstracts of Japan, vol. 013, No. 043, Jan. 31, 19989 and JP 63 239402 A, Oct. 5, 1998.
Matsushita Electric Ind. Co. Ltd., "Production for Fresnel Lens," Patent Abstracts of Japan, vol. 010, No. 045 (P-430), Feb. 21, 1986 and JP 60 191202 A, Sep. 28, 1985.

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