Experimental study of a modified phase diversity with a diffraction grating.
The measurement ability of the conventional Phase diversity wavefront sensor (C-PD WFS) is limited by the accuracy and dynamic range of CCD cameras. In this letter, a modified Phase diversity wavefront sensor based on a diffraction grating (G-PD WFS) is proposed. We build a corresponding experimental setup to compare the measurement accuracy of the G-PD WFS and the C-GPDWFS under the same experimental conditions. The experimental results show that the measurement ability of G-PD WFS is improved obviously, especially for the wavefront aberration with larger amplitude.
Institute of Optics and Electronics, Chinese Academy of Sciences PO Box 350, Chengdu 610209, China. littlepuppet_luo@163.com
Qun
Q
Luo
Linhai
L
Huang
Naiting
N
Gu
Changhui
C
Rao
D004867:Equipment Design; D019544:Equipment Failure Analysis; D010781:Photography / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers