Infrared intrusion sensor with selectable radiation patterns

Details Infrared intrusion sensor with selectable radiation patterns Infrared intrusion sensor with selectable radiation patterns

1982-05-17

1984-05-29

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250347, 250353, G01J 508

Patent

active

044517343

ABSTRACT:
A passive infrared intrusion detector is provided with a lens having selectable patterns of sensitivity. The lens unit can be mounted to the detector in two orientations to provide two different patterns of sensitivity.

REFERENCES:
patent: 4275303 (1981-06-01), Mudge

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