Laser radiation warning sensor utilizing polarization

Details Laser radiation warning sensor utilizing polarization Laser radiation warning sensor utilizing polarization

1986-02-05

1987-07-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356141, 356152, 250227, G01J 120

Patent

active

046820248

ABSTRACT:
A device for the recognition and directional detection of optical radiation, especially laser radiation, i.e., a so-called laser warning sensor. The laser warning sensor comprises several optical input systems to which a light guide path leading to a detector is assigned. In the individual light guide paths, polarizing devices for the linear polarization of the incident optical radiation are provided which determine for each light guide path at its end facing the detector, a specific direction of polarization which is different from the direction of polarization of the other light guide paths. The radiation leaving the ends of the light guide paths combined in a bundle is conducted to a detector designed as a polarimeter. From the direction of polarization determined in the polarimeter, the direction of the incident laser radiation is determined in an evaluation circuit.

REFERENCES:
patent: 3992099 (1976-11-01), Laughlin
patent: 4589776 (1986-05-01), Carver et al.
patent: 4625108 (1986-11-01), Nestel et al.

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