Digitally compatible optical pressure measurement

Details Digitally compatible optical pressure measurement Digitally compatible optical pressure measurement

1980-09-26

1982-03-30

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Photoelectric

73730, 73800, 356 33, G01L 1100

Patent

active

043218318

ABSTRACT:
An apparatus for pressure measurement employs fiber optics to transport a broadband beam light to and from a remote electrically passive sensing head. In the sensing head, a linearly polarized beam is phase shifted in a birefringent plate, then passed through a photoelastic pressure sensor and a polarization analyzer. The wavelength for which the output light has an intensity minimum is a measure of the applied pressure.

REFERENCES:
patent: 3950987 (1976-04-01), Slezinger et al.
patent: 4010632 (1977-03-01), Slezinger et al.
patent: 4171908 (1979-10-01), Robert et al.
patent: 4270050 (1981-05-01), Brogardh

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