Paper
1 July 1990 Hartmann test data reduction
Earl T. Pearson
Author Affiliations +
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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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CITATIONS
Cited by 2 scholarly publications.
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KEYWORDS
Mirrors

Optical testing

Spatial frequencies

Raster graphics

CCD cameras

Charge-coupled devices

Optical telescopes

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