Laser detection and discrimination system

Details Laser detection and discrimination system Laser detection and discrimination system

1989-08-16

1991-09-03

Hannaher, Constantine

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2504581, G01J 554, G01J 556

Patent

active

050457071

ABSTRACT:
Magnesium oxide sensing material is pretreated and charged by UV radiation o identify impingement thereon of radiation from a near infrared laser source by detection of blue emissions which persist for an unusually long period of time, avoiding frequent respotting and recharging. When heated to thermoluminescence peaks above room temperature by irradiation from a far infrared laser source, the magnesium oxide exhibits green luminescence enabling wavelength discrimination between detection of near and far infrared laser sources. Such pretreated magnesium oxide also produces green emissions when irradiated by UV laser sources, to distinguish between detection of the UV laser sources and the far infrared laser sources by discrimination between different fading behaviors of the green emissions.

REFERENCES:
patent: 4427570 (1984-01-01), Chen et al.
patent: 4604225 (1986-08-01), Chen et al.
patent: 4654533 (1987-03-01), Teshima et al.
patent: 4751148 (1988-06-01), Popma et al.
patent: 4806772 (1989-02-01), Lindmayer
patent: 4806825 (1989-02-01), Catherall et al.
patent: 4822520 (1989-04-01), Lindmayer

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