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Wavefront Compensation Using a Silicon Carbide Deformable Mirror with 37 Actuators for Adaptive Optics
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 Title & Authors
Wavefront Compensation Using a Silicon Carbide Deformable Mirror with 37 Actuators for Adaptive Optics
Ahn, Kyohoon; Rhee, Hyug-Gyo; Lee, Ho-Jae; Lee, Jun-Ho; Yang, Ho-Soon; Kihm, Hagyong;
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In this paper, we deal with the wavefront compensation capability of a silicon carbide (SiC) deformable mirror (DM) with 37 actuators for adaptive optics. The wavefront compensation capability of the SiC DM is predicted by computer simulation and examined by actual experiments with a closed-loop adaptive optics system consistsing of a light source, a phase plate, a SiC DM, a high speed Shack-Hartmann sensor, and a control computer. Distortion of wavefront is caused by the phase plate in the closed-loop adaptive optics system. The distorted wavefront has a peak-to-valley (PV) wavefront error of and root-mean-square (RMS) error of . The high-speed Shack-Hartmann sensor measures the wavefront error of the distortion caused by the phase plate, and the SiC DM compensates for the distorted wavefront. The compensated wavefront has residual errors lower than PV and RMS. Consequently, we conclude that we can compensate for the distorted wavefront using the SiC DM in the closed-loop adaptive optics system with an operating frequency speed of 500 Hz.
Adaptive optics;Deformable mirror;Silicon Carbide;Wavefront compensation;
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