Opto-electronic measuring device with optical air wedge spectral

Details Opto-electronic measuring device with optical air wedge spectral Opto-electronic measuring device with optical air wedge spectral

1992-03-31

1994-09-20

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356351, 356349, 356419, G01B 902

Patent

active

053494393

ABSTRACT:
A measuring device comprises a light source with a wide spectrum feeding an optical sensor through an optical fiber. The sensor comprises an interferometer adjusted to a dull tint and an optical component sensitive to a measured parameter, which may be either a pressure, a measured displacement or an index of refraction of a fluid, a readout device includes the photodetector, a processing unit and an optical wedge for producing fringes, whose lateral positions, in contrast, are representative of the spectrum of the flux leaving the interferometer and analyzed by the photodetector. The processing unit measures the lateral position of the fringe and converts it into a value of the parameter P.

REFERENCES:
patent: 3549260 (1970-12-01), Barringer
patent: 4867565 (1989-09-01), Lequime
patent: 4932782 (1990-07-01), Graindorge et al.
patent: 5155552 (1992-10-01), Fortunato et al.
Bosselmann et al. "Multi-Fiber-Coupled Interferometric Position Sensor", OPTO 85, Paris May 21-23, 1985, pp. 168-169.

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