tilted grating spectrum

光栅尺，随意改变光栅尺的长度，光栅缝宽随着光栅尺长度的变化而变化-Grating, grating arbitrarily change the length of the grating with the grating length slit width varies

光栅的上位机显示，能够给下位机发送命令，同时也能够接受下位机传上来的位移数-PC grating display, can give lower computer to send commands, but also can accept displacement machine incoming number