A volume hologram recorded with a random phased reference wave is described. A random phase front of a light wave is generated by illuminating laser light onto an irregular pattern. It is shown that an irregular pattern can improve the wavelength selectivity of a volume hologram. An irregular pattern with a finer surface structure has a better performance. When laser light is focused onto the irregular pattern, the larger focused spot size leads to better wavelength selectivity.
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Jang et al. (1995) studied this question.
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