Optical switch device employing fluorescent substance in combina

Details Optical switch device employing fluorescent substance in combina Optical switch device employing fluorescent substance in combina

1988-12-08

1989-10-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

341 31, 313 54, G01D 534, H01J 156

Patent

active

048719099

ABSTRACT:
This invention relates to an optical switch device including a light spot composed of a fluorescent substance in combination with a radioactive element. A switching signal is obtained from an output from a light detector.

REFERENCES:
patent: 2959701 (1960-11-01), Marzocchi et al.
patent: 3056030 (1962-09-01), Kelchner
patent: 3235741 (1966-02-01), Plaisance
patent: 3617627 (1971-11-01), Mc Lean
patent: 4015122 (1977-03-01), Rubinstein
patent: 4049964 (1977-09-01), Wuchinich et al.
patent: 4260882 (1981-04-01), Barnes
patent: 4652205 (1987-03-01), Ross et al.

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