Optic fiber sensor has a recess at the fiber end, on the optical axis, for a micro ball coated with sensor dyestuff to be bonded in place by an adhesive

摘要

The optic fiber sensor has a fiber core (1) within a mantle (2) and a sensor material, which changes color when in contact with the matter under scrutiny. A recess (3) is centered at the end of the fiber, on its optical axis, with an adhesive bond to secure an optically transparent micro ball (4) coated with the sensor dyestuff material (5).