针对随机相位编码光学图像加密技术，简要回顾了它的国内外研究进展，并讨论了它的发展态势。-Research and progress of optical image encryption using random phase mask present research situation and development of image encryption using random phase mask at home and abroad are reviewed. At the sam

对于相位编码信号的脉压旁瓣抑制。包括巴克码，m序列，MAC码等。-For phase encoding signal pulse pressure sidelobe suppression. Barker code, m sequence, MAC code.