Transducers

Details Transducers Transducers

1976-02-09

1978-05-30

Michell, Robert W.

Surgery

Truss

Perineal

128 205T, 338 15, 357 30, A61B 502

Patent

active

040918033

ABSTRACT:
A transducer for optically detecting a cyclic phenomenon of variable frequency and supplying an electric signal corresponding to the frequency, comprises a light source for illuminating the site of the phenomenon and a detector for detecting variations in the level of light reflected from the site of the phenomenon and providing the required electric signal, the detector being a semiconductor opto-electronic cell and the light source being positioned within the detector.

REFERENCES:
patent: 2820841 (1958-01-01), Carlson et al.
patent: 3139086 (1964-06-01), Botsch et al.
patent: 3228391 (1966-01-01), Fitter
patent: 3238062 (1966-03-01), Sunners et al.
patent: 3289024 (1966-11-01), De Haan et al.
patent: 3602213 (1971-08-01), Howell
patent: 3704706 (1972-12-01), Herczfeld et al.
patent: 3769974 (1973-11-01), Smart et al.
patent: 3807388 (1974-04-01), Orr et al.
patent: 3810460 (1974-05-01), Van Nie

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