An open-loop adaptive optics (AO) system for retinal imaging was constructed using a liquid crystal spatial light modulator (LC-SLM) as the wavefront compensator. Due to the dispersion of the LC-SLM, there was only one illumination source for both aberration detection and retinal imaging in this system. To increase the field of view (FOV) for retinal imaging, a modified mechanical shutter was integrated into the illumination channel to control the size of the illumination spot on the fundus. The AO loop was operated in a pulsing mode, and the fundus was illuminated twice by two laser impulses in a single AO correction loop. As a result, the FOV for retinal imaging was increased to 1.7-deg without compromising the aberration detection accuracy. The correction precision of the open-loop AO system was evaluated in a closed-loop configuration; the residual error is approximately 0.0909 lambda (root-mean-square, RMS), and the Strehl ratio ranges to 0.7217. Two subjects with differing rates of myopia (-3D and -5D) were tested. High-resolution images of capillaries and photoreceptors were obtained. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JBO.17.2.026001]
Kong N. N.,Li C.,Xia M. L.,et al. Optimization of the open-loop liquid crystal adaptive optics retinal imaging system[J]. Journal of Biomedical Optics,2012,17(2).
APA
Kong N. N.,Li C.,Xia M. L.,Li D. Y.,Qi Y.,&Xuan L..(2012).Optimization of the open-loop liquid crystal adaptive optics retinal imaging system.Journal of Biomedical Optics,17(2).
MLA
Kong N. N.,et al."Optimization of the open-loop liquid crystal adaptive optics retinal imaging system".Journal of Biomedical Optics 17.2(2012).
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