Precessions aspheric polishing: new results from the development program

Details Precessions aspheric polishing: new results from the development program Precessions aspheric polishing: new results from the development program

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5180...15w&link_type=abstract

Ultra-fast MTF Test for High-Volume production of CMOS Imaging Cameras. Edited by Dahl, Michael; Heinisch, Josef; Krey, Stefan;

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Scientific paper

The Precessions process for producing aspheric and other optical surfaces is undergoing rapid development. In this paper, we summarise the considerable success achieved in controlling the repeatability of the process on both the 200mm and 600mm machines, and illustrate this with examples of aspherics that have been produced. We particularly describe our approach to fine form-control. This has required the development of various strategies to moderate the volumetric removal rates, in order to give the required sensitivity of removal. We conclude with a discussion of the scaling laws that apply when adapting the process to smaller and larger sized parts. This is illustrated by predicting the process-parameters for mass-producing segments for extremely large telescopes.

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