Light sensor with an adjustable spectral characteristic

Details Light sensor with an adjustable spectral characteristic Light sensor with an adjustable spectral characteristic

1991-09-04

1993-05-25

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

With color transmitting filter

250226, 359590, 359890, G01D 351, G02B 522, G02B 528

Patent

active

052144941

ABSTRACT:
A light sensor comprises optical filters, an interference filter and a photoelectric converting element which receives and photoelectrically converts light which has passed through the optical filters and the interference filter. An incident angle of the incident light on the interference filter can be changed so as to realize a desirable spectral sensitivity in a combination of the optical filters, the interference filter and the photoelectric converting element. The incident angle can be changed by a mounting structure that can rotate about an optical axis.

REFERENCES:
patent: 3877818 (1975-04-01), Button
patent: 4082464 (1978-04-01), Johnson
patent: 4084909 (1978-04-01), Mathisen
patent: 4443108 (1984-04-01), Webster
patent: 4662755 (1987-05-01), Aoki
patent: 4778263 (1988-10-01), Foltyn
patent: 4804271 (1989-02-01), Cammann

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