Optical switch device employing a fluorescent substance with a r

Details Optical switch device employing a fluorescent substance with a r Optical switch device employing a fluorescent substance with a r

1987-03-26

1989-01-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

313 54, 235491, 250229, 341 31, G01V 904, G01D 534

Patent

active

047959002

ABSTRACT:
This invention relates to an optical switch device including a light spot composed of a fluorescent substance in combination with radioactive elements or a pattern of a plurality of light spots and light detectors each manually moved relative to the light spots to detect a fluorescence from each fluorescent substance. An on-off pattern switching signal or a codified switching signal is obtained from an output from each light detector.

REFERENCES:
patent: 2773196 (1956-12-01), Hall
patent: 2959701 (1960-11-01), Marzocchi et al.
patent: 3235741 (1966-02-01), Plaisance
patent: 3253087 (1966-05-01), McIntosh
patent: 3668407 (1972-06-01), Matzen et al.
patent: 4298792 (1981-11-01), Granholm et al.
patent: 4534668 (1985-08-01), Hildel et al.
patent: 4617461 (1986-10-01), Subbarao et al.
Harris, "Optical Overlay Input Device for a Cathode Ray Tube", 11/81, IBM Technical Disclosure Bulletin, vol. 24, No. 6, pp. 2732-2733.

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