Share Email Print
cover

Proceedings Paper

Optical misalignment sensing for optical aperture synthesis telescope by using phase diversity
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.

Paper Details

Date Published: 16 July 2008
PDF: 7 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70154Q (16 July 2008); doi: 10.1117/12.786901
Show Author Affiliations
Fang Cao, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)
Graduate School of Chinese Academy of Sciences (China)
Yongtian Zhu, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)
Zhen Wu, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)


Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

© SPIE. Terms of Use
Back to Top