The all-digital holography is based on the optical theory, combined with the strong manipulated ability of the computer, which is applied to the information security fields.
全数字全息术以光学原理为其理论基础，与计算机强大的处理能力相结合，应用于信息安全领域。
2
All mail can be opened in the mail room and scanned into the computer using optical character recognition.
所有的邮件在邮件处理室中打开，利用光学字符识别扫描进计算机。
3
Optical bistability phenomenon and all-opticalcomputer are the important contents which are studied together presently in laser physics, quantum optics and computer science, etc.