Radiation discrimination system

Details Radiation discrimination system Radiation discrimination system

1967-01-16

1979-04-03

Moskowitz, Nelson

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356346, 329144, G01B 902

Patent

active

041474244

ABSTRACT:
A system for detecting the presence of coherent radiation comprises an interference filter having a pair of partially-reflective mirrors. The spacing between the mirrors is varied in accordance with a sine function to change the transmission wavelength of the mirrors. A reference signal is developed which represents this periodic variation in the spacing of the mirrors. A photodetector on the output side of the filter detects radiation transmitted therethrough, yielding a detection signal in the presence of coherent radiation transmitted through the filter. An indicator responds to the signal output of the photodetector and to the reference signal to produce an identifying indication of the detected radiation.

REFERENCES:
patent: 1792766 (1931-02-01), Schroter
patent: 2385086 (1945-09-01), D'Agostino et al.
patent: 2410502 (1946-11-01), Hurley
patent: 3035492 (1962-05-01), Blythe
patent: 3040583 (1962-06-01), Post
patent: 3295808 (1967-01-01), Webb
Rack et al, "A Technique for Measuring Small Optical Loss Using an Oscillating Spherical Mirror Interferometer," The Bell System Technical Journal, vol. XLIII, No. 4, Jul. 1964, pp. 1563-1579.

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