[OPTICAL REVIEW Vol. 4, No. 1B (1997) 161-163]

Adaptive Computer-Generated Hologram Using Interpolation Method

Nobukazu YOSHIKAWA,1 Masahide ITOH2 and Toyohiko YATAGAI2

1Communications Research Laboratory, 4-2-1, Nukui-Kita, Koganei, Tokyo, 184 Japan, 2Institute of Applied Physics, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, 305 Japan

(Received May 9, 1996; Accepted November 7, 1996)

Kinoform synthesis by an electro-optic hybrid system using an interpolation method is proposed. A programmable liquid crystal spatial light modulator is used as a kinoform. The phase distribution of the kinoform is optimized using the simulated annealing. The cost function is represented by the mean square error between a desired image stored in a computer and a reconstructed image detected by a charge coupled device camera. The interpolation method enables one to reduce the random noise effect in the reconstructed image. Some experimental results are presented.

Key words : kinoform, interpolation method, spatial light modulator, electro-optic hybrid system