Testing of aspheric surfaces

Hans J. Tiziani; Stephan Reichelt; Christof Pruss; M. Rocktaeschel; U. Hofbauer

doi:10.1117/12.448030

9 November 2001 Testing of aspheric surfaces

Hans J. Tiziani, Stephan Reichelt, Christof Pruss, M. Rocktaeschel, U. Hofbauer

Proceedings Volume 4440, Lithographic and Micromachining Techniques for Optical Component Fabrication; (2001) https://doi.org/10.1117/12.448030
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Aspheric surfaces are becoming interesting for the reduction of elements in optical systems as well as for improving the quality of the image forming system. The fabrication process of aspheric surfaces has been improved. For optical testing of aspheric surfaces computer generated holograms (CGHs) are interesting and already used. To perform aspheric testing in the same accuracy as spherical surface testing, further improvements of the CGH-null test method are required. A new concept for testing aspheric surfaces with CGH-nulls, including a calibration of the system, will be described. To specify and verify CGH quality, systematic errors due to fabrication inaccuracies of the CGHs will be analysed. On the other hand, alternative methods that provide more flexibility but possibly less accuracy than the CGH-null technique are required. Potential alternative testing methods of aspherics will be discussed.

Citation Download Citation

Hans J. Tiziani, Stephan Reichelt, Christof Pruss, M. Rocktaeschel, and U. Hofbauer "Testing of aspheric surfaces", Proc. SPIE 4440, Lithographic and Micromachining Techniques for Optical Component Fabrication, (9 November 2001); https://doi.org/10.1117/12.448030

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