Digital Foucault tester for the measurement of parabolic wave form

Xiao-peng Wang; Ri-hong Zhu; Lei Wang

doi:10.1117/12.835808

6 August 2009 Digital Foucault tester for the measurement of parabolic wave form

Xiao-peng Wang, Ri-hong Zhu, Lei Wang

Proceedings Volume 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications; 738422 (2009) https://doi.org/10.1117/12.835808
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

Digital Foucault tester for quantitative estimate the wave form of aspheric surfaces is based on the high precision knife position determination and the image data processing methods. In this paper, we report a set of digital Foucault tester for the measurement of parabolic surface. The movement of the knife-edge is controlled by PC, and the shadow patterns are captured by a CCD in real time and then are fed back to the computer. A new kind of data processing method, which has the advantage of simple arithmetic and high precision, is given in the paper. The method offers a reliable base for Digital Foucault tester.

Citation Download Citation

Xiao-peng Wang, Ri-hong Zhu, and Lei Wang "Digital Foucault tester for the measurement of parabolic wave form", Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 738422 (6 August 2009); https://doi.org/10.1117/12.835808

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