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Optical Engineering

Automated surface positioning for a non-null test interferometer
Author(s): Goran Baer; Eugenio Garbusi; Wolfram Lyda; Wolfgang Osten
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Paper Abstract

An automatic method for the positioning of the test surface in a non-null interferometer is presented. A major task in the interferometric testing of surfaces is to avoid the introduction of surface aberrations due to an incorrect placement of the test object in the interferometer cavity. In the case of plane and spherical surfaces, adjustment errors can usually be distinguished from surface figure errors and therefore removed, but in the case of aspherical surfaces this task becomes nontrivial. In this work, the effect on the measured phase due to lateral and axial displacements of the aspherical surface is calculated, and an adjustment method for the positioning of the surface at a predefined measurement location presented. Experimental results showing the feasibility of the proposed procedure are shown.

Paper Details

Date Published: 1 September 2010
PDF: 12 pages
Opt. Eng. 49(9) 095602 doi: 10.1117/1.3488051
Published in: Optical Engineering Volume 49, Issue 9
Show Author Affiliations
Goran Baer, Univ. Stuttgart (Germany)
Eugenio Garbusi, Univ. Stuttgart (Germany)
Wolfram Lyda, Univ. Stuttgart (Germany)
Wolfgang Osten, Univ. Stuttgart (Germany)

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