Radiation detector

Details Radiation detector Radiation detector

1988-12-27

1990-10-02

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503383, 250339, 250353, G01J 504, G01J 506, G01J 508

Patent

active

049609955

ABSTRACT:
A radiation detector, serving as an infrared movement monitor, which is reactive to thermal radiation includes a housing having a window admitting the radiation and optics. The window having a size being coordinated with the angle of coverage of the optics disposed behind it. The optics focussing the radiation onto an optical sensor, preferably through a Fresnel lens. The window having a frame for accepting and guiding at least one masking element formed of a strip-shaped plastic film diminishing the infrared radiation and being slideably displaced in a guide channel along the window for covering the optics in a variable sub-region thereof.

REFERENCES:
patent: 4192372 (1980-03-01), Bellows
patent: 4447726 (1984-05-01), Mudge et al.
patent: 4604524 (1986-08-01), Kotlicki et al.
patent: 4769545 (1988-09-01), Fraden
patent: 4799243 (1989-01-01), Zepke
patent: 4841284 (1989-06-01), Biersdorff

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