Optical sensor arrangement including polarization-altering senso

Details Optical sensor arrangement including polarization-altering senso Optical sensor arrangement including polarization-altering senso

1989-08-24

1991-08-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023119, 324 96, G01N 904

Patent

active

050380290

ABSTRACT:
The invention relates to an optical sensor arrangement having a light emitting arrangement (2), which feeds a first emission light beam into a first emission optical waveguide (3) and a second emission light beam into a second emission optical waveguide, having a polarizer (5), which is coupled with the two emission optical waveguides and generates from the first and second emission light beam a respective linearly polarized light beam, and having an optical sensor (1), which alters the state of polarization of a supplied polarized light beam as a function of a physical quantity acting on the sensor and which supplies a sensor light beam formed from a polarized light beam. Behind the optical sensor (1) there is disposed an analyzer (7), which separates each sensor light beam into two linearly polarized reception light beams, one of which is fed to a light receiving arrangement (12) via a first reception optical waveguide (9) and the other via a second reception optical waveguide (11). From the reception light beams, the light receiving arrangement forms electrical signals, from which an evaluation circuit ( 13) determines the physical quantity.

REFERENCES:
patent: 3466541 (1969-09-01), Bernard et al.
patent: 3679974 (1972-07-01), Mollenbeck
patent: 4442350 (1984-04-01), Rashleigh
patent: 4529875 (1985-07-01), Brogardh et al.
patent: 4698497 (1987-10-01), Miller et al.
patent: 4743119 (1988-05-01), Ida

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