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Proceedings Paper

Stitching oil-on interferometry of large fused silica blanks
Author(s): Dörte Schönfeld; Thomas Reuter; Ralf Takke; Stephan Thomas
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Paper Abstract

Ongoing laser fusion experiments like the "Laser MegaJoule Project" and the "National Ignition Facility" have created a strong demand for large optical lenses of special grade fused silica. The required lens dimension poses several challenges to the manufacturing process. One of the key issues is to provide a suitable measurement technique, which is capable to fulfill the extreme demands for characterizing the optical homogeneity of those large fused silica blanks. We report on our first results achieved with an interferometer system that was installed to explore the potential and feasibility of stitching interferometry. Although the principle of stitching is well known, it had to be adapted to the special "oil-on measurement technique" that is necessary to characterize lens blanks without expensive surface polishing.

Paper Details

Date Published: 19 October 2005
PDF: 8 pages
Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 59650V (19 October 2005); doi: 10.1117/12.626115
Show Author Affiliations
Dörte Schönfeld, Heraeus Quarzglas GmbH and Co. KG (Germany)
Thomas Reuter, Heraeus Quarzglas GmbH and Co. KG (Germany)
Ralf Takke, Heraeus Quarzglas GmbH and Co. KG (Germany)
Stephan Thomas, Heraeus Quarzglas GmbH and Co. KG (Germany)

Published in SPIE Proceedings Vol. 5965:
Optical Fabrication, Testing, and Metrology II
Angela Duparré; Roland Geyl; Lingli Wang, Editor(s)

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