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Proceedings Paper

Aspheric form testing using multiple-wavelength approaches in combination with subNyquist techniques
Author(s): Tilo Pfeifer; Horst Konstantin Mischo; Jens Evertz; Rainer Tutsch
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Paper Abstract

Aspheres with no rotational symmetry offer new perspectives for the development of high power laser optics. Confronted with the dynamic range of the manufacturing process recently opened by scientists in ultra-precision engineering, interferometric form testing is having to meet the challenge posed by complex mirror shapes with high local slopes and/or stepheights exceeding the range of unambiguity which conventional interferometry can handle. For this reason, special interferometric techniques such as two wavefront interferometry, sub-Nyquist- and sub-aperture-approaches are to be combined, to overcome the above mentioned problems. But even if the refined experimental setup is capable of resolving the interferometric fringe pattern, the question as to how the data collected should be interpreted, is extremely time-consuming. The use of ray-tracing software in experimental setups with chromatic aberrations or distortions is, therefore inevitable, building a theoretical background to distinguish between system and manufacturing errors.

Paper Details

Date Published: 19 August 1996
PDF: 8 pages
Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); doi: 10.1117/12.246769
Show Author Affiliations
Tilo Pfeifer, Fraunhofer-Institut fuer Produktionstechnologie (Germany)
Horst Konstantin Mischo, Fraunhofer-Institut fuer Produktionstechnologie (Germany)
Jens Evertz, Fraunhofer-Institut fuer Produktionstechnologie (Germany)
Rainer Tutsch, Fraunhofer-Institut fuer Produktionstechnologie (Germany)

Published in SPIE Proceedings Vol. 2775:
Specification, Production, and Testing of Optical Components and Systems
Anthony E. Gee; Jean-Francois Houee, Editor(s)

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