Apparatus for measuring distances with a measuring element opera

Details Apparatus for measuring distances with a measuring element opera Apparatus for measuring distances with a measuring element opera

1990-02-12

1991-06-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73800, H01J 516, G01L 124

Patent

active

050234463

ABSTRACT:
Distances are measured by a measuring element operating on an optical basis by sensing light reflections caused by the bending in unison of at least two parallel light conductors. The measuring element has two parallel photoconductors of different lengths extending from a sensor inlet of a carrier, e.g., in the form of a sheath. The effective length of each conductor is determined by a respective mirror at the effective conductor end. Through the introduction of light into the shorter photoconductor and by the bending of the light conductors, light is coupled over to the second photoconductor. The extent of bending is measured by ascertaining the intensity and travel time of the reflections from both conductors. A reflection only from the shorter light conductor indicates that there is no bending or deflection of the two light conductors and hence no distance is being measured.

REFERENCES:
patent: 4070118 (1978-01-01), Maslowski et al.
patent: 4443698 (1984-04-01), Schiffner
patent: 4482890 (1990-11-01), Forbes et al.

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