
Proceedings Paper
Experimental results for absolute cylindrical wavefront testingFormat | Member Price | Non-Member Price |
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Paper Abstract
Applications for Cylindrical and near-cylindrical surfaces are ever-increasing. However, fabrication of high quality
cylindrical surfaces is limited by the difficulty of accurate and affordable metrology. Absolute testing of such surfaces
represents a challenge to the optical testing community as cylindrical reference wavefronts are difficult to produce. In
this paper, preliminary results for a new method of absolute testing of cylindrical wavefronts are presented. The method
is based on the merging of the random ball test method with the fiber optic reference test. The random ball test assumes a
large number of interferograms of a good quality sphere with errors that are statistically distributed such that the average
of the errors goes to zero. The fiber optic reference test utilizes a specially processed optical fiber to provide a clean
high quality reference wave from an incident line focus from the cylindrical wave under test. By taking measurements at
different rotation and translations of the fiber, an analogous procedure can be employed to determine the quality of the
converging cylindrical wavefront with high accuracy. This paper presents and discusses the results of recent tests of this
method using a null optic formed by a COTS cylindrical lens and a free-form polished corrector element.
Paper Details
Date Published: 5 September 2014
PDF: 6 pages
Proc. SPIE 9206, Advances in Metrology for X-Ray and EUV Optics V, 92060E (5 September 2014); doi: 10.1117/12.2062320
Published in SPIE Proceedings Vol. 9206:
Advances in Metrology for X-Ray and EUV Optics V
Lahsen Assoufid; Haruhiko Ohashi; Anand Krishna Asundi, Editor(s)
PDF: 6 pages
Proc. SPIE 9206, Advances in Metrology for X-Ray and EUV Optics V, 92060E (5 September 2014); doi: 10.1117/12.2062320
Show Author Affiliations
Patrick J. Reardon, The Univ. of Alabama in Huntsville (United States)
Ayshah Alatawi, The Univ. of Alabama in Huntsville (United States)
Published in SPIE Proceedings Vol. 9206:
Advances in Metrology for X-Ray and EUV Optics V
Lahsen Assoufid; Haruhiko Ohashi; Anand Krishna Asundi, Editor(s)
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