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Proceedings Paper

Manufacturing of the 1070mm F/1.5 ellipsoid mirror
Author(s): Peiji Guo; Jingchi Yu; Yaoming Zhang; Gufeng Qiu
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Paper Abstract

The manufacturing procedure of a φ1070mm in diameter F/1.5 ellipsoid mirror is introduced in detail. For testing the rough-ground surface, guiding shaping and fine grinding, a three dimension X-θ-Z profilometer is developed, the instrument measures surface profiles with 1μm accuracy and the biggest mirror being tested is φ1200mm in diameter. During polishing and fine figuring, we chose null test by null corrector with point source at infinity, the designed null corrector includes two piece of lenses and the designed residual wave front aberration is less than 0.008λ(λ=0.6328μm)PV. For avoiding the influence of gravity deformation during polishing and testing, a kind of support system with multipoint unequal support force is developed by applying FEA-based optimization. The mirror was finally figured to the shape accuracy of 0.016λRMS.

Paper Details

Date Published: 20 May 2009
PDF: 5 pages
Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 728210 (20 May 2009); doi: 10.1117/12.830818
Show Author Affiliations
Peiji Guo, Suzhou Univ. (China)
Jingchi Yu, Suzhou Univ. (China)
Yaoming Zhang, Suzhou Univ. (China)
Gufeng Qiu, Suzhou Univ. (China)


Published in SPIE Proceedings Vol. 7282:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; John M. Schoen; Yoshiharu Namba; Shengyi Li, Editor(s)

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