Dual technology intruder detection system with modular optics

Details Dual technology intruder detection system with modular optics Dual technology intruder detection system with modular optics

1986-06-30

1988-05-24

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340521, 340552, 340561, 340565, 2503361, 250347, 250353, G08B 1900, G08B 1318

Patent

active

047469064

ABSTRACT:
Disclosed herein is a dual technology intruder detection system which features a modular optical system by which the field of protection of one subsystem can be changed relative to the field of view of the other by merely altering the orientation of one optical module relative to another. Such modular optical system includes a multifaceted reflector having two sets of planar reflective facets. Depending on the orientation of such multifaceted reflector relative to a separate spherical reflector, two different fields of view are provided, whereby false alarm-producing can be avoided.

REFERENCES:
patent: 3936822 (1976-02-01), Hirschberg
patent: 4179691 (1979-12-01), Keller
patent: 4468658 (1984-08-01), Rossin
patent: 4660024 (1987-04-01), McMaster

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