Fiber optical sensor device for measuring a physical parameter

Details Fiber optical sensor device for measuring a physical parameter Fiber optical sensor device for measuring a physical parameter

1981-02-02

1983-10-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, G01D 530, G01J 334

Patent

active

044081235

ABSTRACT:
A fiber optical sensor device is provided for measuring a physical parameter. The sensor device contains a light source which emits a light beam into the end of a first light transmitting fiber. Light delivered from the output end of the fiber is directed to a light dispersing or selecting device such as a prism or an interference filter. This device disperses or splits the light transmitted by the first light transmitting fiber into its spectral components. The sensor device also contains a second light transmitting fiber. The input end of this second fiber receives the spectral components, whereby the components to be transmitted by the second fiber are selected dependent upon the physical parameter to be measured. The output end of the second fiber directs the selected component(s) to a light detector which measures the component intensity. The output signal of the detector is a measure of the physical parameter.

REFERENCES:
patent: 4223216 (1980-09-01), Quick et al.
patent: 4329058 (1982-05-01), James et al.
K. A. James, W. H. Quick and V. H. Strahan, "Fiber Optics: The Way to True Digital Sensors?", Control Engineering, Feb. 1979, pp. 30-33.

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