Application of computer generated hologram technology in optical correlation recognition system

In order to realize the miniaturization and integration of the optical correlation recognition system,an optical correlation recognition system was proposed with the help of computer generated hologram(CGH).Theory analysis and experimental results show that complex filter made of CGH instead of Fourier lens,integrates the second Fourier lens in the 4f system.So there is no need of Fourier lens behind the complex filter.The system has reduced the optics component,simplified optical section at the same time.It also has the character of shift invariability as 4f optical correlation recognition system and can be used as optical correlation recognition system.