The performance of broadband volume holographic imaging system in terms of depth selectivity is investigated. The mechanism for depth resolution degradation is explained. In order to overcome this resolution degradation, a novel imaging device, the confocal-rainbow volume holographic imaging system, is proposed. Modeling and experimental validation of the performance of this novel imaging system indicates that depth resolution <16 (mu)m is achievable. The lateral resolution of this device is <2.5 (mu)m along a field of view of 300 (mu)m X 100 (mu)m.
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