Motion detector with non-diverging insensitive zones

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

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Details

340565, 340567, G01J 502, G08B 13193, G08B 1318

Patent

active

060375949

ABSTRACT:
A passive infrared motion detector that creates a detection pattern with non-diverging insensitive zones. The sensing elements are of alternating polarity and each has a width w. An optical collection system directs infrared radiation onto the sensing elements. The sensing elements are separated by a distance equal to an integer multiple of width w, with the integer being at least two. The optical centers of the optical collection system are separated by an integer multiple of width w, with the integer being at least two. The arrangement of the optical centers and the sensing elements results in a detection pattern with non-diverging insensitive zones, with the insensitive zones having a negligible width.

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