Optical transducer and measuring device

Details Optical transducer and measuring device Optical transducer and measuring device

1985-03-01

1987-06-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231P, 73705, G01D 534, G01L 900

Patent

active

046706496

ABSTRACT:
An optical transducer for producing a measurement signal which is modulated in accordance with the position of a physically movable member in the form of a modulating mirror and which also produces a reference signal the intensity of which is independent of the position of the modulating mirror. Both the modulating mirror and a further optical element which is arranged to provide the reference signal are arranged on the optical axis along which a light beam is directed by an input lens. Thus the system can tolerate normally experienced vibrations transverse to the optical axis and can provide for a substantial degree of movement of the modulating mirror.

REFERENCES:
patent: 3273447 (1966-09-01), Frank
patent: 3327584 (1967-06-01), Kissinger
patent: 3842353 (1974-10-01), Stewart
patent: 4487206 (1984-12-01), Aagard

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