Testing large aspheric surfaces with complementary annular subaperture interferometric method

Xi Hou; Fan Wu; Baiping Lei; Bin Fan; Qiang Chen

doi:10.1117/12.786398

23 July 2008 Testing large aspheric surfaces with complementary annular subaperture interferometric method

Xi Hou, Fan Wu, Baiping Lei, Bin Fan, Qiang Chen

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 70183K (2008) https://doi.org/10.1117/12.786398
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

Xi Hou, Fan Wu, Baiping Lei, Bin Fan, and Qiang Chen "Testing large aspheric surfaces with complementary annular subaperture interferometric method", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70183K (23 July 2008); https://doi.org/10.1117/12.786398

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