Analysis of deforming a 1.5-m ultrathin spherical mirror into an off-axis parabola

Chunmei Zeng; Jingchi Yu; Peiji Guo

doi:10.1117/12.952471

15 October 2012 Analysis of deforming a 1.5-m ultrathin spherical mirror into an off-axis parabola

Chunmei Zeng, Jingchi Yu, Peiji Guo

Proceedings Volume 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 84151B (2012) https://doi.org/10.1117/12.952471
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Chunmei Zeng, Jingchi Yu, and Peiji Guo "Analysis of deforming a 1.5-m ultrathin spherical mirror into an off-axis parabola", Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 84151B (15 October 2012); https://doi.org/10.1117/12.952471

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