| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a size of receiving signals constant whether a distance is large or small by radiating a laser light to an object to be measured in the atmosphere, receiving a scattering light as the receiving signal and amplifying the receiving signal. SOLUTION: An amplifier multiplies a receiving signal (voltage Vin) by A and t<2> . An amplified square of a time is obtained by an integration of the receiving signal double. An output Vout of the amplifier is nearly constant irrespective of the time (t) (distance). Accordingly, a signal from a far object to be measured can be realized surely. A change in intensity of signals because of a measurement distance is corrected, so that signals of a constant size can be obtained. A situation that a near distance signal is saturated if it is matched in level to a far distance signal can be prevented. Moreover, a signal voltage processed through a distance correction can be obtained directly, thereby facilitating adjustment of a laser radar with the use of an oscilloscope or the like.</p> |
