OCR is carries on the scanning recognition using optics technology to the writing and the character, transforms technology which the computer encodes.
OCR就是利用光学技术对文字和字符进行扫描识别，转化成计算机内码的技术。
2
The imaging spectrometer using diffractive optics has compact construction, small volume and rapid scanning speed, and its practical ground manufacture have been visible.
采用二元光学元件的成像光谱仪结构紧凑，体积小，扫描速度快，已研制出地面实用型产品；
3
By combining high-speed scanning and high-resolution optics, it has scanning performance of 1000 data points up to 150 Hz.