Detection device using fiber optic techniques

Details Detection device using fiber optic techniques Detection device using fiber optic techniques

1983-05-16

1989-01-24

Sikes, William L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9629, 250227, 310220, G02B 626, G02B 602, H01J 516, H01R 3946

Patent

active

047997516

ABSTRACT:
A deflection detection device for monitoring deflection of a diaphragm having a radius r has a first plurality of optical fibers having fiber ends concentrically disposed about the center of the diaphragm at a radius r.sub.1 where r.sub.1 is less than r. A second plurality of optical fibers having fiber ends concentrically disposed about the center of the diaphragm forms a circle having a radius r.sub.2 where r is greater than r.sub.2 is greater than r.sub.1. A third plurality of optical fibers having fiber ends concentrically disposed about the center of the diaphragm forms a circle having a radius r.sub.3 where r is greater than r.sub.3 is greater than r.sub.2. The ends of the first and third plurality of optical fibers are light capturing and the ends of the second plurality of optical fibers are light emitting. Deflection of the diaphragm is detected when light from the second plurality of fibers is reflected off the diaphragm into the first and third plurality of fibers in proportion to the amount of deflection of the diaphragm according to a predetermined ratio.

REFERENCES:
patent: 3327584 (1967-06-01), Kissinger
patent: 4249076 (1981-02-01), Bergstrom
patent: 4334321 (1982-06-01), Edelman
patent: 4432599 (1984-02-01), McMahon
J. Anthony Powell, "Optical Zero-Differential Pressure Switch and Its Evaluation in a Multiple-Pressure Measuring System", Aug. 1977, Report No. TM X-3571 (NASA Report).
R. O. Cook and C. W. Hamm, "Fiber Optic Lever Displacement Transducer", Applied Optics, vol. 18, No. 19, Oct. 1, 1979, pp. 3230-3241.

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