Apparatus for detecting changes of length in a medium employing

Details Apparatus for detecting changes of length in a medium employing Apparatus for detecting changes of length in a medium employing

1991-05-31

1992-09-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73800, H01J 516

Patent

active

051480174

ABSTRACT:
Apparatus for detecting changes of a medium along a measuring path in the medium, comprising several lightwave conductors arranged on a carrier, conveniently in a sleeve. Reflective ends of the light wave conductors are fixed at different distances along the measuring path. Type, extent, and location of longitudinal changes in the medium to be checked can be detected at any time by optical length measuring of the individual lightwave conductors by means of an optical rangefinder.

REFERENCES:
patent: 4636638 (1987-01-01), Hwang et al.
patent: 5026141 (1991-06-01), Griffiths
patent: 5038618 (1991-08-01), Malvern

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