Translator Disclaimer
30 January 2003 Edge effects with Preston equation
Author Affiliations +
In the polishing process, the wear tends to be greater when the tool extends beyond the edge of the workpiece. A linear pressure distribution (between the tool and the workpiece) has been used to explain this effect, however, this model also can predict negative pressures. This could mean that material is deposited instead of being removed. We present a new pressure distribution proposal, which presents like a skin effect. This means that the pressure is significantly higher at the border points than at internal points of the glass. With this model the material removal at the border points is increased considerably since, according to Preston, the wear is proportional to the pressure. This pressure distribution model is applied to calculate the wear produced by a square tool on a glass border moving along straight lines.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.


Lightweighted ZERODUR for telescopes
Proceedings of SPIE (July 18 2014)
Polishing techniques for MEGARA pupil elements optics
Proceedings of SPIE (July 22 2016)
The double pyramid wavefront sensor for LBT
Proceedings of SPIE (July 15 2008)
SOFIA lightweight primary mirror
Proceedings of SPIE (August 25 1998)
Handling and transporting the 8.4 m mirrors for the Large...
Proceedings of SPIE (September 29 2004)

Back to Top