Multiple range passive infrared detection system

Details Multiple range passive infrared detection system Multiple range passive infrared detection system

1980-04-08

1982-07-13

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250342, 250352, 250353, 340567, 350299, G02B 510, G08B 1318

Patent

active

043397484

ABSTRACT:
A passive infrared detection system which exhibits a consistent optical aperture and sensitivity over different operating ranges. The system includes a mirror assembly having a plurality of spherical segments arranged in two or more ranks, each corresponding to a different operating range. Each mirror segment is disposed at its respective focal length from a detector, and is of a size and configuration to provide an intended optical aperture to achieve uniform detection sensitivity irrespective of the range of the target.

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