Interferometric sensor and use thereof in an interferometric dev

Details Interferometric sensor and use thereof in an interferometric dev Interferometric sensor and use thereof in an interferometric dev

1989-06-01

1991-07-16

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356352, G01B 902

Patent

active

050320262

ABSTRACT:
Pressure and temperature are sensed with first and second interferometers having beam paths originating at an optical fiber located at a collimating lens focal point. One interferometer includes a deformable membrane having a deformation responsive to the sensed pressure and temperature which cause the membrane position to vary with respect to a face of a glass plate. In the second interferometer the optical path length varies as a function of the sensed temperature. The collimating lens collects optical beams derived from the first and second interferometers and supplies them to the optical fibre. In one embodiment, the interferometers are coaxial and in parallel; in a second embodiment the interferometers are in series.

REFERENCES:
patent: 4430565 (1984-02-01), Brogardh et al.
patent: 4533247 (1985-08-01), Epworth
patent: 4596466 (1986-06-01), Ulrich
patent: 4772786 (1988-09-01), Langdon
patent: 4778982 (1988-10-01), Saaski et al.

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