可以实现激光谐振腔的自再现；有利于了解激光腔的原理-Laser resonator can be achieved self-reproduction is conducive to understanding the principle of laser cavity

DEscr iptION PT2248 is an infrared remote control transmitter utilizing CMOS Technology. It is capable of 18 functions and a total of 75 commands. Single-shot and continuous keys are available. Furthermore, multiple keying is possible.