초록 ▼

A sensor system includes an optical fiber sensor element which is connected to a light source at one end and a detector at the opposite end. The sensor element is an optical fiber which has a light transmitting core, a cladding layer surrounding the core, and an outer protective layer. The outer pro

A sensor system includes an optical fiber sensor element which is connected to a light source at one end and a detector at the opposite end. The sensor element is an optical fiber which has a light transmitting core, a cladding layer surrounding the core, and an outer protective layer. The outer protective layer is removed along at least part of the length of the fiber to expose a portion of the cladding layer, and the exposed portion of the cladding layer is roughened to produce a plurality of surface scratches extending through at least part of the thickness of the cladding layer. The exposed, roughened portion of the cladding layer forms a sensor region through which light is lost from the core, and is exposed to a medium to be monitored so that the amount of light lost will be dependent on the refractive index of the medium.

대표청구항 ▼

[ We claim:] [1.] A sensor device, comprising:a length of optical fiber having a core, a cladding layer surrounding the core, and an outer protective layer;at least a portion of the length of the optical fiber having the outer protective layer removed to expose a portion of the cladding layer;the ex

[ We claim:] [1.] A sensor device, comprising:a length of optical fiber having a core, a cladding layer surrounding the core, and an outer protective layer;at least a portion of the length of the optical fiber having the outer protective layer removed to expose a portion of the cladding layer;the exposed portion of the cladding layer being roughened, whereby a part of the light propagating through the core will be lost through the exposed, roughened portion of the cladding, the amount of light lost being dependent on the refractive index of a medium surrounding the exposed portion of the cladding layer; andthe exposed portion of the cladding layer extending along a part of the length of the optical fiber, and the outer protective layer covering the cladding layer on each side of the exposed portion.