Share Email Print
cover

Proceedings Paper

Tip-tilt adaptive correction based on stochastic parallel gradient descent optimization algorithm
Author(s): Huimin Ma; Pengfei Zhang; Jinghui Zhang; Chunhong Qiao; Chengyu Fan
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

Adaptive optics correcting technique based on stochastic parallel gradient descent (SPGD) control algorithm is an alternative approach which is independent of wavefront sensor and optimizes the performance metric directly. In this paper we establish a simulation model of tip-tilt adaptive optics system, where SPGD optimization algorithm is used to correct the tip-tilt aberration induced by dynamic turbulence. The distance between the measured centroid of a blurring image and the demarcated centroid of the ideal image is considered as the system performance metric, and signals applied to compensation of the drifting atmosphere are generated for tip-tilt mirror. The sensitivity of the performance metrics is investigated, and the convergence rate and the stability are analyzed. By means of this optimization algorithm, the centroid of the image is modified in real time, which results in the improvement of the long exposure image.

Paper Details

Date Published: 9 November 2010
PDF: 7 pages
Proc. SPIE 7849, Optical Design and Testing IV, 78491O (9 November 2010); doi: 10.1117/12.869414
Show Author Affiliations
Huimin Ma, Anhui Institute of Optics and Fine Mechanics (China)
Pengfei Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Jinghui Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Chunhong Qiao, Anhui Institute of Optics and Fine Mechanics (China)
Chengyu Fan, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)

© SPIE. Terms of Use
Back to Top