Wavefront shaping applied on scattering light is a promising optical imaging method in biological systems. Normally, optimized modulation can be obtained by a Liquid-Crystal Spatial Light Modulator (LC-SLM) and CCD hardware iteration. Here we introduce an improved method for this optimization process. The core of the proposed method is to firstly detect the disturbed wavefront, and then to calculate the modulation phase pattern by computer simulation. In particular, phase retrieval method together with phase conjugation is most effective. In this way, the LC-SLM based system can complete the wavefront optimization and imaging restoration within several seconds which is two orders of magnitude faster than the conventional technique. The experimental results show good imaging quality and may contribute to real time imaging recovery in scattering medium.
Hexiang He and Kam Sing Wong, "Accelerated wavefront determination technique for optical imaging through scattering medium," Proc. SPIE 9717, Adaptive Optics and Wavefront Control for Biological Systems II, 97170Q (Presented at SPIE BiOS: February 14, 2016; Published: 15 March 2016); https://doi.org/10.1117/12.2213929.
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