Interpolation method for computer-generated holograms using random phase technique

An interpolation method for reconstructed images of computer-generated holo grams (CGHs) enables one to synthesize CGHs with a large space bandwidth pr oduct (SBWP) from CGHs with a small SBWP. The phase information of objects is regarded as constant because the method is based on digital image proces sing techniques. Therefore, diffraction efficiency is low due to the satura tion effect in the recording process. To improve the diffraction efficiency , a random phase technique is employed for the interpolation method to the CGH. Effects of the random phase in the reconstructed image are discussed i n several interpolation types. The interpolation method is also applied to a kinoform. Some computer simulations and optical experiments are presented .