Intruder perceiving apparatus by means of infrared detection

Details Intruder perceiving apparatus by means of infrared detection Intruder perceiving apparatus by means of infrared detection

1988-12-13

1989-07-18

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

340567, G01J 110

Patent

active

048496359

ABSTRACT:
An apparatus for perceiving an intruder by means of detecting infrared rays radiated from the intruder through a plurality of detectable infrared flux enveloping spaces spanned supposedly between the infrared receiving portion of the apparatus and a plurality of sub-domains supposed on the ground, the detectable infrared flux enveloping spaces being arranged densely so that at least two of them may always be crossed by an intruder, and such a dense arrangement of the detectable infrared flux enveloping spaces being effected with a multi-lens system molded in one body so as to have on its surface a plurality of infrared converging lenses having their respective principal axes differently directed providing the detectable infrared flux enveloping spaces.

REFERENCES:
patent: 4263585 (1981-04-01), Schaefer
patent: 4339748 (1982-07-01), Guscott et al.
patent: 4342987 (1982-08-01), Rossin
patent: 4386275 (1983-05-01), Kalmowitz et al.
patent: 4523095 (1985-06-01), Keller-Steinbach
patent: 4551711 (1985-11-01), Akiyama et al.

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