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An Improved Wavefront Determination Method Based on Phase Conjugation for Imaging through Thin Scattering medium

Authors He, Hexiang HKUST affiliated (currently or previously)
Wong, Kam Sing View this author's profile
Issue Date 2016
Source Journal of Optics (United Kingdom) , v. 18, (8), August 2016, article number 085604
Summary Wavefront shaping applied on scattering light is an efficient method for imaging through thin scattering layers. Normally, optimized modulation can be obtained by a liquid-crystal spatial light modulator (LCSLM) and CCD hardware iteration. In this paper, an improved method for such an optimization process is introduced. The core of the proposed method is to firstly detect the disturbed wavefront, and then to calculate the modulation phase pattern by computer simulation. Fast processing speed resulting in high quality images have been achieved with this new approach. Using supposition of conjugated phase of the scattering wavefront and a Fresnel phase scheme, more than two orders of magnitude improvement in processing speed for imaging restoration was shown compared to the LCSLM-CCD iteration method.
ISSN 2040-8978
Language English
Format Article
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