Chinese Optics Letters, 2014, 12 (12): 121202, Published Online: Dec. 1, 2014
Dual-thread parallel control strategy for ophthalmic adaptive optics Download: 698次
120.3890 Medical optics instrumentation 170.0110 Imaging systems 220.1000 Aberration compensation 220.1080 Active or adoptive optics
Abstract
To improve ophthalmic adaptive optics (AO) speed and compensate for ocular wavefront aberration of high temporal frequency, the AO wavefront correction is implemented with a control scheme including two parallel threads: one is dedicated to wavefront detection and the other conducts wavefront reconstruction and compensation. With a custom Shack–Hartmann wavefront sensor that measures the ocular wave aberration with 193 subapertures across the pupil, AO achieves a closed-loop updating frequency up to 110 Hz, and demonstrates robust compensation for ocular wave aberration up to 50 Hz in an AO scanning laser ophthalmoscope.
Yongxin Yu, Yuhua Zhang. Dual-thread parallel control strategy for ophthalmic adaptive optics[J]. Chinese Optics Letters, 2014, 12(12): 121202.