A blind variant of digital holographic microscopy is presented that removes the requirement for a well-characterized, highly divergent reference beam. This is achieved by adopting an off-axis recording geometry where a sequence of holograms is recorded as the reference is tilted, and an iterative algorithm that estimates the amplitudes and phases of both beams while simultaneously enhancing the numerical aperture. Numerical simulations have demonstrated the accuracy and robustness of this approach when applied to the coherent imaging problem.
Patrick N. Anderson, Florian Wiegandt, Daniel J. Treacher, Matthias M. Mang, Ilaria Gianani, Andrea Schiavi, David T. Lloyd, Kevin O'Keeffe, Simon M. Hooker, and Ian A. Walmsley, "Blind digital holographic microscopy," Proc. SPIE 10127, Practical Holography XXXI: Materials and Applications, 101270H (Presented at SPIE OPTO: January 31, 2017; Published: 6 April 2017); https://doi.org/10.1117/12.2250317.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon