Adjustable mirror mount for photoelectric intrusion detector

Details Adjustable mirror mount for photoelectric intrusion detector Adjustable mirror mount for photoelectric intrusion detector

1978-11-06

1980-07-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, H01J 314

Patent

active

042152712

ABSTRACT:
An improvement in a photoelectric intrusion detector unit of the type designed to resemble a duplex electrical outlet. An angled mirror and a collimating lens are supported on a common mount which is rotatable about an axis of rotation which is angularly displaced from the optical axis of the lens but passes through its focal point. The optical axis of the lens describes a conical surface about the axis of rotation.

REFERENCES:
patent: 3535539 (1970-10-01), Malespina et al.
patent: 3578978 (1971-05-01), Laurent
patent: 4097733 (1978-06-01), Langenbach et al.

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