Optical displacement sensor using dual reference reflectors

Details Optical displacement sensor using dual reference reflectors Optical displacement sensor using dual reference reflectors

1994-04-08

1995-12-05

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055929, 25055939, 25022721, 356375, G01B 1114

Patent

active

054731569

ABSTRACT:
An optical displacement sensor comprises first and second optical fibers which transmit light to and receive light reflected from first and second fixed reflectors. A third optical fiber transmits light to and receives light reflected from a moving reflector on the end of a core which moves in response to the displacement to be measured. The intensities of the light reflected to the fibers allows the displacement to be determined with immunity from variations such as in transmissivity and refractive index of a medium between the fibers and the reflectors.

REFERENCES:
patent: 4488813 (1984-12-01), Kissinger et al.
patent: 4914290 (1990-04-01), Hilgart et al.
patent: 5068527 (1991-11-01), Iwamoto et al.
patent: 5149963 (1992-09-01), Hassler, Jr.
patent: 5223708 (1993-06-01), Van Deventer

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