27 May 2011 Digital holographic microscopy for dynamic imaging of hydrogels
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Digital holographic microscopy (DHM) is an effective method that can be used to investigate transparent objects. The technique allows to get both intensity and phase distributions of wavefronts transmitted through samples without scanning or destructing them. In this paper, a DHM setup with sub-micrometer resolution is used to record the deformation of hydrogels during the swelling and shrinking process. To overcome the out-of-focus imaging caused by the shifting and deformation of the samples, numerical focusing instead of mechanical focusing is employed. The intensity images at different depths can be reconstructed by using one single hologram, and the phase change as a function of the time can be also determined.
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Caojin Yuan, Caojin Yuan, Giancarlo Pedrini, Giancarlo Pedrini, Guodong Fu, Guodong Fu, Jun Ma, Jun Ma, Wolfgang Osten, Wolfgang Osten, } "Digital holographic microscopy for dynamic imaging of hydrogels", Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80822F (27 May 2011); doi: 10.1117/12.889494; https://doi.org/10.1117/12.889494

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