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19 October 2005 ASPHERO5 - rapid fabrication of precise aspheres
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ASPHERO5 is a funded research project (project prime: Schneider OpticalMachines) with the goal of economic fabrication of high precision aspheres. The research is concentrated on the classical process chain consisting of grinding and polishing. The mid spatial artefacts are one of the limiting factors for grinding, whereas for polishing the variation of the local removal rate depends on the local curvature. In this paper first results of minimizing mid spatial artefacts for the grinding step and analyzing local removal rates for the polishing step are reported. Based on the results of our research, aspheres with local radii from 200 mm to 10 mm are polished to 25 nm rms final surface error. Nevertheless, to perform the different process steps in an economic way is still a challenge.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rainer Boerret, Volkmar Giggel, and Hexin Wang "ASPHERO5 - rapid fabrication of precise aspheres", Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 59650I (19 October 2005);


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