We have developed a tabletop adaptive optics wavefront control system used to correct dynamic distortions. The system uses a Shack-Hartmann sensor constructed by using a lenslet array and a high-speed CMOS camera to measure distortion, a high-resolution liquid crystal spatial light modulator to correct distortion, and a personal computer to execute feedback control. A correction refresh rate of 50 cycles per second was achieved as the result of the high-speed vision system. The temporal characteristic measurement was based on the response to periodic signals of patterns, and the measured bandwidth was about 7Hz. We also describe the optical configuration and experimental results of a performance evaluation.

Date Published: 23 December 2004
PDF: 9 pages
Proc. SPIE 5639, Adaptive Optics and Applications III, (23 December 2004); doi: 10.1117/12.576491

Published in SPIE Proceedings Vol. 5639:
Adaptive Optics and Applications III
Wenhan Jiang; Yoshiji Suzuki, Editor(s)