Optical fiber remote sensing system with electromagnetic wave me

Details Optical fiber remote sensing system with electromagnetic wave me Optical fiber remote sensing system with electromagnetic wave me

1997-05-15

1998-10-27

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356437, H01J 516

Patent

active

058280588

ABSTRACT:
Disclosed is an optical fiber remote sensing system, which has: first and second light sources which are connected to ends of branched optical fibers and emit lights with two wavelengths different from each other; one or more optical detectors which conduct a photoelectric conversion of the lights propagated through the optical fibers from the first and second light sources and generate an electromagnetic wave with a wavelength corresponding to a difference between the two different wavelengths; and a measuring means which receives the electromagnetic wave propagated through a measured substance and measures a state of the measured substance based on an optical absorption characteristic of the measured substance.

REFERENCES:
patent: 3860818 (1975-01-01), Stalder et al.
Uetaki, M., "Millimeter Wave Technique Manual and Development", Realize Co., Jun. 30, 1993, p. 156.

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