Hartmann test data reduction

Earl T. Pearson

doi:10.1117/12.19232

1 July 1990 Hartmann test data reduction

Earl T. Pearson

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19232
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

It is presently noted that the availability of CCD cameras, in conjunction with state-of-the-art computer hardware and software, render Hartmann testing in optical shops a viable alternative to, or checking procedure for, other types of tests. An evaluation is made of data reduction methods for this test. While the reduction of data-fitting to derivatives of Zernike polynomials filters out high-frequency surface information, and runs the risk of yielding incorrect coefficients, it may be able to find special-purpose applications. The least-square integration of a surface is reliable, but time-consuming in the case of large data sets. Subaperture Hartmann results can be assembled to obtain the entire surface; rastering can double the high spatial frequency spatial information of the surface.

Citation Download Citation

Earl T. Pearson "Hartmann test data reduction", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19232

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