16 July 2008 Optical misalignment sensing for optical aperture synthesis telescope by using phase diversity
Author Affiliations +
Abstract
An optical aperture synthesis telescope such as the LBT will suffer from phase errors unless the apertures are aligned to within a small fraction of a wavelength. A phase diversity wave-front sensor can measure phase errors brought by a misaligned aperture synthesis telescope. The Phase Diversity is formulated in the context of nonlinear programming where a metric is developed and then minimized. We here introduce a novel Genetic Algorithms (GAs), evaluate the different Zernike coefficients to obtain the wave-front error. The results of the computer simulations performed with simulated data including the effects of noise are shown for the case of random misalignment phase errors on each of three sub-telescope.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fang Cao, Fang Cao, Yongtian Zhu, Yongtian Zhu, Zhen Wu, Zhen Wu, } "Optical misalignment sensing for optical aperture synthesis telescope by using phase diversity", Proc. SPIE 7015, Adaptive Optics Systems, 70154Q (16 July 2008); doi: 10.1117/12.786901; https://doi.org/10.1117/12.786901
PROCEEDINGS
7 PAGES


SHARE
Back to Top