Optical Decryption System of Binary Image Using Two-Wave Mixing in Photorefractive Crystal

광굴절 매질에서 2광파 혼합을 이용한 이진 영상 복호화 시스템

We suggest binary image decryption system using two-wavc mixing in Photorefractive crystal. Compared with a conventional method, this method can make optical alignment easily, and brighten the encrypted image even if a small input signal, by index grating of photorefractive crystal. Also it can reconstruct the encrypted image by only reference beam in real time.