Sensor for measuring distances between output end piece of optical fiber and measurement medium has sensor head, optical fiber pair, light source, intensity sensor

摘要

The sensor has a housing and at least one pair of optical fibers with output and input end pieces in a sensor head, The output end piece of the first fiber and the input end piece of the second fiber have inclined ends fixed to a surface adjacent to or near each other with their axes mutually inclined to determine the scatter angle of light from the first fiber on the surface of the medium. The sensor has a housing and at least one pair of optical fibers (8,10) with output and input end pieces in a sensor head (4), whereby the input end piece of the first fiber is connected to a light source (14) and the output end piece of the second to a device for measuring light intensity (18). The output end piece (12) of the first fiber and the input end piece (16) of the second fiber have inclined ends fixed to a surface adjacent to or near each other with their axes mutually inclined to determine the scatter angle of light from the first fiber on the surface of the medium (28).