| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply and accurately adjust the light axis on the projector side so as to receive a sufficient amount of infrared pulse beam by converting the frequency of the monitor output of a projector and sending it to the projector side to output it visually or acoustically. SOLUTION: A projector 1 and a receiver 2 are separately installed and their light axis is adjusted by a gunsight. Then, after the projector 1 and receiver 2 are operated, a device for adjusting light axis is provided on the sides of the projector 1 and receiver 2, and a V/F converter 11 is connected to the monitor terminal of the receiver 2. The converter 11 outputs a frequency signal corresponding to the level of monitor output of the receiver 2 which is obtained as voltage signal. The frequency signal from the converter 11 is converted into optical signal by a projector 12 and it is sent to a receiver 13 provided on the projector 1 side. The receiver 13 converts the received optical signal into electric signal, that is, frequency signal, and the frequency signal from the receiver 13 is amplified by an amplifier 14, then a speaker 15 is driven to output an acoustic output.</p> |
