Fiber optic coupled pressure transducer using single fiber and m

Details Fiber optic coupled pressure transducer using single fiber and m Fiber optic coupled pressure transducer using single fiber and m

1986-09-02

1987-12-08

Kamm, William E.

Surgery

Truss

Pad

128675, 128748, 73705, A61B 502

Patent

active

047112468

ABSTRACT:
A miniaturized pressure transducer is disclosed wherein light transmitted through a single optical fiber is reflected by a diaphragm exposed to and deflected in accordance with the pressure being measured. The terminal end of the fiber is covered by a light absorption layer having a plurality of discrete openings through which light may pass for reflection by the diaphragm with the proportion of light passing back through the openings and the fiber varying in accordance with the distance between the end of the fiber and the diaphragm, as determined by the pressure exerted thereon. The diaphragm is incorporated in a disposable tip which is threaded to an elongated tube which holds a ferrule containing the fiber and fixedly positioning the terminal end thereof for predetermined spacing from the diaphragm. The disclosure also includes a novel method of mass producing the end-coated fibers in assembled relation with the ferrules.

REFERENCES:
patent: 3215135 (1965-11-01), Franke
patent: 3249105 (1966-05-01), Polanyi
patent: 3267932 (1966-08-01), Valliere
patent: 3273447 (1966-09-01), Frank
patent: 4201222 (1980-05-01), Haase
patent: 4487206 (1984-12-01), Aagard
patent: 4593701 (1986-06-01), Kobayashi et al.
Delannois, "Low Cost IC Transducer for Medical Pressure Measurements", Med. and Biol. Engr., vol. 12, No. 3, 5-1974, pp. 364-365.

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