Share Email Print
cover

Proceedings Paper

Experiment system of thin-mirror active optics
Author(s): Ding-qiang Su; Sheng-tao Jiang; WeiYao Zou; Shi-mo Yang; ShuYing Yang; Haiying Zhang; Qi-chao Zhu
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

In this system, the experiment mirror has 500 mm aperture and 6 mm thickness. There are 58 actuators and three fixed points in it. A Shack-Hartmann test apparatus is used for the measurement of wavefront aberration. In this apparatus an ingenious equivalent of lenslet array is used. All image points formed by it appear very clear theoretical diffraction pattern. And a CCD from a TV camera is used. Like European Southern Observatory, we use quasi-Zernike polynomial to fit the wavefront aberration for correcting. But in our work correction is to the whole wavefront aberration (except lateral focus and longitudinal focus). In our work, another important character is that the damp least square method is used for determining the forces. The correction results are the root mean square of wavefront aberration about 0.02 - 0.04 micrometers . A circle including measuring and correcting the wavefront aberration takes about 3.3 minutes. A more precise algorithm proposed by us is used for calculating the wavefront aberration for checking.

Paper Details

Date Published: 1 June 1994
PDF: 13 pages
Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); doi: 10.1117/12.176229
Show Author Affiliations
Ding-qiang Su, Nanjing Astronomical Instruments Research Ctr. (China)
Sheng-tao Jiang, Nanjing Astronomical Instruments Research Ctr. (China)
WeiYao Zou, Nanjing Astronomical Instruments Research Ctr. (China)
Shi-mo Yang, Nanjing Astronomical Instruments Research Ctr. (China)
ShuYing Yang, Nanjing Astronomical Instruments Research Ctr. (China)
Haiying Zhang, Nanjing Astronomical Instruments Research Ctr. (China)
Qi-chao Zhu, Nanjing Astronomical Instruments Research Ctr. (China)


Published in SPIE Proceedings Vol. 2199:
Advanced Technology Optical Telescopes V
Larry M. Stepp, Editor(s)

© SPIE. Terms of Use
Back to Top