Share Email Print
cover

Proceedings Paper

Annular-force-based variable curvature mirror combined with multi-point actuation array to improve the surface figure accuracy: a prototype design
Author(s): Hui Zhao; Xiaopeng Xie; Guorui Ren; Yunfei Du; Meiying Liu; Jingxuan Wei
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 recent years, a novel optical zooming technique has been paid much attention. With the help of optical leveraging effect, it is possible to alter the system focal length dramatically without moving elements involved in by only changing the curvature radius of VCM (variable curvature mirror) slightly. With no doubt, VCM is the key to realize non-moving element optical zooming and it has to provide large enough saggitus variation while still maintaining the high surface figure accuracy to ensure high quality imaging. In our previously published paper, an annular force based VCM has been designed, fabricated and tested. Experiments demonstrate that with the aperture of 100mm and thickness of 2mm, the VCM could generate a large saggitus variation exceeding 30λ (λ=632.8nm). However, the optical quality degrades very fast and this makes such a VCM unsuitable for optical imaging in visible band. Therefore in this manuscript, a multipoint actuation array, which is composed of totally 49 piezoelectric actuators, is embedded into the annular structure to aim to correct the surface figure distortion caused by large saggitus variation. The new structure model has been designed and numerical simulation indicates that the surface figure distortion could be well corrected as long as the degraded surface figure accuracy is better than 1.8λ (λ=632.8nm) (RMS). Based on this, a new prototype VCM is being fabricated and intermediate results are reported here.

Paper Details

Date Published: 2 November 2016
PDF: 10 pages
Proc. SPIE 9683, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 96831V (2 November 2016); doi: 10.1117/12.2242256
Show Author Affiliations
Hui Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Xiaopeng Xie, Univ. of Chinese Academy of Sciences (China)
Guorui Ren, Xi'an Institute of Optics and Precision Mechanics (China)
Yunfei Du, Xi'an Institute of Optics and Precision Mechanics (China)
Meiying Liu, Xi'an Institute of Optics and Precision Mechanics (China)
Jingxuan Wei, Xidian Univ. (China)


Published in SPIE Proceedings Vol. 9683:
8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Wenhan Jiang; Li Yang; Oltmann Riemer; Shengyi Li; Yongjian Wan, Editor(s)

© SPIE. Terms of Use
Back to Top