| 摘要 |
<p>Disclosed herein is a photoelectric sensor (30) and method for sensing a target at a predetermined location. In at least one embodiment, the photoelectric sensor (30) includes a light source (34) that emits light, an output circuit including first and second photodetectors (36,38), first and second receive lenses respectively positioned adjacent to the first and second photodetectors, respectively, and a support structure for supporting each of the light source, the photodetectors, and the receive lenses in relation to one another. If the target is at the predetermined location, then a first portion of the emitted light is received by the first photodetector after being reflected off of the target and passing through the first receive lens, and a second portion of the emitted light is received by the second photodetector after being reflected off of the target and passing through the second received lens. Further, the output circuit produces an output signal indicative of a sensed characteristic of the target based on signals generated by the first and the second photodetectors in response to the portions of the light received by the photodetectors.</p> |
