Numerical reconstruction in in-line digital holography by translation of CCD position and gradient operator method |
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Authors: | C Quan CJ Tay |
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Institution: | Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore |
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Abstract: | We propose an approach based on axial translation of a charge-coupled device (CCD) and gradient operator method for numerical reconstruction in in-line digital holography. The object wave in the hologram (or CCD) plane is determined using one position translation of CCD, and a phase-shifting device can be fully avoided. Gradient operator method is further applied to detect the focal plane of an object, and the object wave is reconstructed by an angular spectrum algorithm with the detected focal distance. The feasibility and effectiveness of the proposed method are demonstrated by numerical simulations. |
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Keywords: | Numerical reconstruction In-line digital holography Focal distance detection Image processing |
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