Optically resonant sensor with increased monotonic range

Details Optically resonant sensor with increased monotonic range Optically resonant sensor with increased monotonic range

1989-07-06

1991-01-08

Willis, Davis L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023119, 25022723, H01J 516, G01D 534

Patent

active

049838245

ABSTRACT:
A variable gap optical sensor device with a pair of opposed reflective surfaces and having a periodic response function. The sensor includes stiffening means or limiting means intermediate the reflective surfaces to diminish the potential variation in the gap between the reflective surfaces and thereby increase the monotonic range of the periodic response function, resulting in a dual stage sensor response function with a second stage having an increased period.

REFERENCES:
patent: 3387494 (1968-06-01), Golay
patent: 4473747 (1984-09-01), Brogardh et al.
patent: 4588886 (1986-05-01), Snider
patent: 4617608 (1986-10-01), Blonder et al.
patent: 4678902 (1987-07-01), Perlin
patent: 4682500 (1987-07-01), Uda
patent: 4757194 (1988-07-01), Simms

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