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Proceedings Paper

Microwave assisted thermal polishing of aspheric optical glass surfaces by CO2-laser
Author(s): Hans-Kurt Toenshoff
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Paper Abstract

Presently aspheric glass surfaces for the optical industry getting more and more important to reach the high demands on optical systems and designs. Still there is a limitation in polishing of especially complex structures and freeforms by mechanical methods with regard to process time and therefore economic efficiency. In the research activities a thermal polishing process for smoothing optical glasses is developed. It is the goal to polish mainly asperic lenses and other micro-machined structures on glass substrates. Due to the sensitivity of thermal stresses of glasses the glass body has to be heated for reduction of the thermal gradient in order to use a CO3-Laser for polishing the surface. The basic investigations using this combination of processes show the feasibility of thermal polishing. Further process development and advantageous laser beam guidance will show the polishing of complex surface structures.

Paper Details

Date Published: 19 May 2003
PDF: 3 pages
Proc. SPIE 10314, Optifab 2003: Technical Digest, 1031408 (19 May 2003); doi: 10.1117/12.2283997
Show Author Affiliations
Hans-Kurt Toenshoff, Laser Zentrum Hannover e.V. (Germany)

Published in SPIE Proceedings Vol. 10314:
Optifab 2003: Technical Digest
Walter C. Czajkowski; Toshihide Dohi; Hans Lauth; Harvey M. Pollicove, Editor(s)

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