An improved optical identity authentication system with significant output images

作者：Yuan Sheng^*; Liu Ming tang; Yao Shu xia; Xin Yan hui

来源：Optics and Laser Technology, 2012, 44(4): 888-892.

DOI：10.1016/j.optlastec.2011.11.014

• Optical identity authentication
• Identity verification
• Double random-phase encoding

An improved method for optical identity authentication system with significant output images is proposed. In this method, a predefined image is digitally encoded into two phase-masks relating to a fixed phase-mask, and this fixed phase-mask acts as a lock to the system. When the two phase-masks, serving as the key, are presented to the system, the predefined image is generated at the output. In addition to simple verification, our method is capable of identifying the type of input phase-mask, and the duties of identity verification and recognition are separated and, respectively, assigned to the amplitude and phase of the output image. Numerical simulation results show that our proposed method is feasible and the output image with better image quality can be obtained.

• 出版日期2012-6
• 单位中北大学