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Proceedings Paper

Laser-assisted pre-finishing of optical ceramic materials
Author(s): Jay C. Rozzi; Odile H. Clavier; Michael D. Barton
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Paper Abstract

At Creare, we are developing a laser-assisted, pre-finishing system that enables the single-point diamond turning of super-hard ceramics into hemispheres, ogives, and other shapes that are ready for final optical finishing. Currently, super-hard ceramic materials cannot be affordably processed due to the low material removal rates and the high amount of sub-surface damage associated with current processes. Our innovation uses a low-power, far-infrared laser to heat, but not ablate, a thin layer of material prior to its removal. By heating the ceramic material, plastic-like deformation at the cutting edge is fostered by high-temperature dislocation motion. In doing so, the cutting forces are reduced which enables attendant reductions in tool wear, surface and sub-surface damage, and processing time. Our paper will summarize the development of our innovation, describe the process, discuss the machine tool, and review the latest results.

Paper Details

Date Published: 2 May 2007
PDF: 7 pages
Proc. SPIE 6545, Window and Dome Technologies and Materials X, 65450P (2 May 2007); doi: 10.1117/12.718618
Show Author Affiliations
Jay C. Rozzi, Creare Inc. (United States)
Odile H. Clavier, Creare Inc. (United States)
Michael D. Barton, Creare Inc. (United States)

Published in SPIE Proceedings Vol. 6545:
Window and Dome Technologies and Materials X
Randal W. Tustison, Editor(s)

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