Process optimization for polishing large aspheric mirrors

被引:6
作者
Burge, James H. [1 ]
Kim, Dae Wook
Martin, Hubert M.
机构
[1] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA
来源
ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION | 2014年 / 9151卷
关键词
Optical fabrication; large optics; computer-controlled polishing; astronomical optics; SMOOTHING MODEL;
D O I
10.1117/12.2057727
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Large telescope mirrors have stringent requirements for surface irregularity on all spatial scales. Large scale errors, typically represented with Zernike polynomials, are relatively easy to control. Errors with smaller spatial scale can be more difficult because the specifications are tighter. Small scale errors are controlled with a combination of natural smoothing from large tools and directed figuring with precisely controlled small tools. The optimization of the complete process builds on the quantitative understanding of natural smoothing, convergence of small tool polishing, and confidence in the surface measurements. This paper provides parametric models for smoothing and directed figuring that can be used to optimize the manufacturing process.
引用
收藏
页数:13
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