摘要 |
<p>A fiber optic proximity detector (10) for use in sensing the relative position of an object or change thereof wherein the light is reflected by the target surface (22) and returned along the transmitting fibers (26, 28) and utilized along with the reflected light returned along the receiving fiber (26, 30) so as to effect automatic surface reflectivity compensation with the detector being coupled to an optical extender (46) to increase the working distance of the probe from the target.</p> |