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Proceedings Paper

Analysis of deforming a 1.5-m ultrathin spherical mirror into an off-axis parabola
Author(s): Chunmei Zeng; Jingchi Yu; Peiji Guo
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Paper Abstract

The collimating mirror is a key component of a solar simulator. It is generally made up of one large spherical or aspherical mirror or some small unit mirrors. By using active optical technology, a spherical mirror can be deformed into an off-axis parabola. This paper reports a finite element analysis process with a 1.5-m ultra-thin spherical mirror. The best fitting spherical surface, active control method, actuator arrangements are introduced respectively. The analysis results show that the surface quality(=2.258 μm RMS) with an arrangement of 21 actuators meets the accuracy requirement, and the maximum stress(=0.979MPa) is less than allowable stress(=3.43 MPa). Finally, 1.5-m prototype mirror and its active support structure are presented. This method is effective for non-imaging optical systems with low precision.

Paper Details

Date Published: 15 October 2012
PDF: 5 pages
Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 84151B (15 October 2012); doi: 10.1117/12.952471
Show Author Affiliations
Chunmei Zeng, Soochow Univ. (China)
Jingchi Yu, Soochow Univ. (China)
Peiji Guo, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 8415:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Wenhan Jiang; Myung K. Cho; Fan Wu, Editor(s)

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