초록 ▼

An electrically passive fiber optic position sensor having a course measurement indicator and a fine measurement indicator combined to determine the overall position, whether linear or angular, of an object measured. The coarse measurement sensor depends on bending loss of optic fiber in one embodim

An electrically passive fiber optic position sensor having a course measurement indicator and a fine measurement indicator combined to determine the overall position, whether linear or angular, of an object measured. The coarse measurement sensor depends on bending loss of optic fiber in one embodiment and on the Faraday effect in another embodiment. The fine measurement indicator depends on the Faraday effect in both embodiments. The invention avoids the problems of contaminated optics as the light need not leave the optic fiber.

대표청구항 ▼

An electrically passive fiber optic position sensor for measuring the position of an object, comprising: first detection means for detecting a coarse position of the object, via a first fiber optic light signal dependent upon a variation of at least one fiber optical parameter; and second detection

An electrically passive fiber optic position sensor for measuring the position of an object, comprising: first detection means for detecting a coarse position of the object, via a first fiber optic light signal dependent upon a variation of at least one fiber optical parameter; and second detection means for detecting a periodic fine position of the object, via a second fiber optic light signal dependent on a variation of magnetic flux.