Fiber optical measuring device

Details Fiber optical measuring device Fiber optical measuring device

1980-04-07

1982-08-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73293, G01N 1506

Patent

active

043429190

ABSTRACT:
The invention relates to a fiber optical measuring device for measuring physical parameters of a medium, preferably the level thereof, and it comprises an electronic unit and a transducer unit interconnected by an optical fiber, the transducer including at least one light guide connected to the optical fiber. The light guide is adapted to be lowered or introduced into the medium, the level, or other parameters, of which is to be measured, the light guide having a core with a higher refractive index than the surrounding sheath. The sheath has one or more regions along the light guide that are light transparent by being uncovered or only very thinly covered. When the guide is immersed into the medium, it influences the channel such that light in the thinly covered or uncovered regions of the guide is transmitted from the core, which light is representative of the level, or other parameter, of the medium.

REFERENCES:
patent: 4287427 (1981-09-01), Scifres

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