Stitching oil-on interferometry of large fused silica blanks

Dörte Schönfeld; Thomas Reuter; Ralf Takke; Stephan Thomas

doi:10.1117/12.626115

19 October 2005 Stitching oil-on interferometry of large fused silica blanks

Dörte Schönfeld, Thomas Reuter, Ralf Takke, Stephan Thomas

Proceedings Volume 5965, Optical Fabrication, Testing, and Metrology II; 59650V (2005) https://doi.org/10.1117/12.626115
Event: Optical Systems Design 2005, 2005, Jena, Germany

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.

Citation Download Citation

Dörte Schönfeld, Thomas Reuter, Ralf Takke, and Stephan Thomas "Stitching oil-on interferometry of large fused silica blanks", Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 59650V (19 October 2005); https://doi.org/10.1117/12.626115

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