Temperture and pressure monitors utilizing interference filters

Details Temperture and pressure monitors utilizing interference filters Temperture and pressure monitors utilizing interference filters

1988-04-25

1989-11-28

Sykes, Angela D.

Surgery

Truss

Pad

128675, 128736, 128748, A61B 502

Patent

active

048830623

ABSTRACT:
An interference edge filter is mounted on the end of an optical fiber to provide a sensor for pressure or temperature. The filter is formed such that the transition slope of the filter curve will move to the left or right depending upon the changes in the parameter being monitored. The shift in the position of the slope of the edge filter curve is detected by passing the reflected light through an interference bandpass filter having an edge slope intersecting the transition slope and measuring the intensity of the light passing the bandpass filter.

REFERENCES:
patent: 3822695 (1974-07-01), Takayama
patent: 4114604 (1978-09-01), Shaw et al.
patent: 4201222 (1980-05-01), Haase
patent: 4593701 (1986-06-01), Kobayashi et al.
patent: 4641658 (1987-02-01), Lepper
patent: 4691709 (1987-09-01), Cohen
patent: 4727730 (1988-03-01), Boiarski et al.
Ealing Electro-Optics Company Product Guide 1987-88, pp. 220-223, Interference Filters.

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