Fiber optical measuring device, employing a sensor material with

Details Fiber optical measuring device, employing a sensor material with Fiber optical measuring device, employing a sensor material with

1982-05-17

1985-02-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, G02B 514

Patent

active

044980043

ABSTRACT:
The invention relates to a measuring device for measuring physical and/or chemical quantities, comprising a measuring transducer and an evaluating electronic unit interconnected by at least one light-conducting fiber, said evaluating electronic unit comprising one or more light sources for transmitting light via said fiber/fibers to at least one sensor element, forming a part of said transducer, said evaluating electronic unit also comprising one or more light detectors for detecting light emitted from said sensor element(s). The invention is characterized in that said at least one sensor element possesses a non-linear relationship between the incident light intensity illuminating the sensor element and the intensity of the light emitted from the sensor element, that said light source/light sources are arranged to emit light having at least two, non-identical light intensities, and that at the same time said detector/detectors are arranged to measure the light coming from the sensor element.

REFERENCES:
patent: 4207459 (1980-06-01), Nakamura et al.
patent: 4281245 (1981-07-01), Brogardh et al.
patent: 4290146 (1981-09-01), Adolfsson et al.
patent: 4378496 (1983-03-01), Brogardh et al.

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