Optical pressure sensor

Details Optical pressure sensor Optical pressure sensor

1980-09-26

1983-01-18

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Photoelectric

73730, 356 33, G01L 900

Patent

active

043686451

ABSTRACT:
A system for sensing pressure features an electrically passive sensing head connected to electrically active components by a fiber optic cable. A preferred embodiment combines a polariscope bracketing a quarter wave plate and a photoelastic medium. The dependence of the intensities of two polarization components of light emerging from the photoelastic medium on the pressure applied to the medium permits the measurement of that pressure in a manner that has quadratic error dependence on optical misalignment.

REFERENCES:
patent: 3786681 (1974-01-01), Kiehn
patent: 3950987 (1976-04-01), Slezinger et al.
patent: 4010632 (1977-03-01), Slezinger et al.
patent: 4155256 (1979-05-01), Lautzenhiser
patent: 4171908 (1979-10-01), Robert et al.
patent: 4270050 (1981-05-01), Brogardh

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