Ultraviolet ray detecting device

Details Ultraviolet ray detecting device Ultraviolet ray detecting device

1990-12-11

1992-05-19

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250372, 2504581, G01J 158

Patent

active

051151383

ABSTRACT:
An ultraviolet ray detecting device comprises an external light shielding structure for shielding an external light from entering there, a fluorescent member disposed in the external light shielding structure and containing a fluorescent substance, the fluorescent member being excited by an ultraviolet ray to thereby generate a fluorescence ray from the fluorescent substance, a light entrance window through which a light is guided and emitted to the fluorescent member, an ultraviolet ray pass filter for extracting the ultraviolet ray from the light through the light entrance means, and a light discharging window adapted to discharge the fluorescence ray generated by the excitation fo the fluorescent member. The ultraviolet ray pass filter may be eliminated to limit the light incident angle. The light shielding structure may be composed of a box or tubular member. The fluorescence ray discharging window is eliminated and a photodiode is disposed in contact to one end of the fluorescent member. A light emitting diode is disposed to the other end of the fluorescent member for preliminarily coloring the fluorescent member.

REFERENCES:
patent: 1777999 (1930-10-01), Foulke
patent: 4201916 (1980-05-01), Ellner
patent: 4371897 (1983-02-01), Kramer
patent: 4935631 (1990-06-01), Mosley et al.

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