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Proceedings Paper

Testing large aspheric surfaces with complementary annular subaperture interferometric method
Author(s): Xi Hou; Fan Wu; Baiping Lei; Bin Fan; Qiang Chen
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Paper Abstract

Annular subaperture interferometric method has provided an alternative solution to testing rotationally symmetric aspheric surfaces with low cost and flexibility. However, some new challenges, particularly in the motion and algorithm components, appear when applied to large aspheric surfaces with large departure in the practical engineering. Based on our previously reported annular subaperture reconstruction algorithm with Zernike annular polynomials and matrix method, and the experimental results for an approximate 130-mm diameter and f/2 parabolic mirror, an experimental investigation by testing an approximate 302-mm diameter and f/1.7 parabolic mirror with the complementary annular subaperture interferometric method is presented. We have focused on full-aperture reconstruction accuracy, and discuss some error effects and limitations of testing larger aspheric surfaces with the annular subaperture method. Some considerations about testing sector segment with complementary sector subapertures are provided.

Paper Details

Date Published: 23 July 2008
PDF: 8 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70183K (23 July 2008); doi: 10.1117/12.786398
Show Author Affiliations
Xi Hou, Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Sciences (China)
Fan Wu, Institute of Optics and Electronics (China)
Baiping Lei, Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Sciences (China)
Bin Fan, Institute of Optics and Electronics (China)
Qiang Chen, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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