Abstract
We develop an adaptive-optics system based on a Mach–Zehnder radial shearing interferometer with liquid-crystal-device (LCD) phase-shift interferometry (PSI). Using accurate phase calibration and transient nematic driving of the LCD, the developed three-step PSI procedure can be achieved in a time of . The proposed Mach–Zehnder radial shearing PSI method reconstructs the phase information using a digital signal processor (DSP). The DSP then computes appropriate control signals to drive a deformable mirror in such a way as to eliminate the wavefront distortion. The current adaptive-optics system is capable of suppressing low-frequency thermal disturbances with a signal-to-noise ratio improvement of more than and a steady-state phase error of less than root mean square when the control loop is operated at a frequency of .
© 2006 Optical Society of America
Full Article | PDF ArticleMore Like This
Takamasa Suzuki, Tsutomu Takahashi, and Osami Sasaki
Appl. Opt. 48(29) 5561-5566 (2009)
Shijie Hu, Bing Xu, Xuejun Zhang, Jing Hou, Jian Wu, and Wenhan Jiang
Appl. Opt. 45(12) 2638-2642 (2006)
Youichi Bitou
Opt. Lett. 28(17) 1576-1578 (2003)