| 摘要 |
<p>A sensor is used to measure the displacement of either the emitter or the receiver of an optical transducer. It can provide a signal to compensate for any effect of the displacement on the quality of the transducer. The sensor comprises the optical emitter (a) and the optical receiver (b) of the transducer. The emitter (a) can be light emitting diode and the receiver can be a photo-diode or a photo-transistor giving a signal proportional to light intensity. A strip of material (c) is placed between the emitter (a) and the receiver (b). The strip has an optical transmission coefficient which varies linearly in the direction of displacement of either the emitter (a) or receiver (b). The signal due to the displacement is fed to any subsequent electronic unit used with the emitter or receiver (a, b) and can compensate for the effects of the displacement.</p> |
