Testing large plane mirrors with the Ritchey-Common test in two angular positions

Bernd Doerband; Stefan Schulte; Frank Schillke; Wolfgang Wiedmann

doi:10.1117/12.360162

6 September 1999 Testing large plane mirrors with the Ritchey-Common test in two angular positions

Bernd Doerband, Stefan Schulte, Frank Schillke, Wolfgang Wiedmann

Proceedings Volume 3739, Optical Fabrication and Testing; (1999) https://doi.org/10.1117/12.360162
Event: Optical Systems Design and Production, 1999, Berlin, Germany

Abstract

A mathematical algorithm is given and explained in detail that can be applied to a Ritchey-Common test in two angular positions to calculate deviations. The algorithm comprises a transformation form wavefront to mirror coordinates and a weighting function. Influences of the interferometer's misalignments are removed by fitting appropriate functions in the mirror plane. Functionality and accuracy have been checked by simulations and experiments. As an example one of the M3-mirrors of the Very Large Telescope fabricated by Carl Zeiss is shown.

Citation Download Citation

Bernd Doerband, Stefan Schulte, Frank Schillke, and Wolfgang Wiedmann "Testing large plane mirrors with the Ritchey-Common test in two angular positions", Proc. SPIE 3739, Optical Fabrication and Testing, (6 September 1999); https://doi.org/10.1117/12.360162

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