近几年来，光学信息处理系统凭借其高速并行等独特优势，它与信息隐藏的结合成为一个崭新的交叉领域，引起了人们浓厚兴趣。本文围绕用随机相位编码、数字全息术等实现隐藏的技术手段，分析阐释光学信息隐藏的一些主要方法，同时对多重信息和三维信息的隐藏也进行介绍。最后作了简要的展望。

Information hiding using optical processing system is becoming a new inter-discipline and receives increasing attention recently, because of the inherent advantages of the system, such as high speed and parallel processing. In the present paper, the major methods of optical information hiding, basing on the technique like random phase encoding and digital holography, are described and analyzed. Multiple and 3D information hiding are also introduced. Finally the difficulties and possible advances for further research are also pointed out in brief.