Ultrasonic precision optical grinding technology

Michael J. Cahill; Michael J. Bechtold; Edward Fess; Frank L. Wolfs; Rob Bechtold

doi:10.1117/12.2195977

11 October 2015 Ultrasonic precision optical grinding technology

Michael J. Cahill, Michael J. Bechtold, Edward Fess, Frank L. Wolfs, Rob Bechtold

Proceedings Volume 9633, Optifab 2015; 96330L (2015) https://doi.org/10.1117/12.2195977
Event: SPIE Optifab, 2015, Rochester, New York, United States

Abstract

As optical geometries become more precise and complex and a wider range of materials are used, the processes used for manufacturing become more critical. As the preparatory stage for polishing, this is especially true for grinding. Slow processing speeds, accelerated tool wear, and poor surface quality are often detriments in manufacturing glass and hard ceramics. The quality of the ground surface greatly influences the polishing process and the resulting finished product.

Through extensive research and development, OptiPro Systems has introduced an ultrasonic assisted grinding technology, OptiSonic, which has numerous advantages over traditional grinding processes. OptiSonic utilizes a custom tool holder designed to produce oscillations in line with the rotating spindle. A newly developed software package called IntelliSonic is integral to this platform. IntelliSonic automatically characterizes the tool and continuously optimizes the output frequency for optimal cutting while in contact with the part. This helps maintain a highly consistent process under changing load conditions for a more accurate surface. Utilizing a wide variety of instruments, test have proven to show a reduction in tool wear and increase in surface quality while allowing processing speeds to be increased.

OptiSonic has proven to be an enabling technology to overcome the difficulties seen in grinding of glass and hard optical ceramics. OptiSonic has demonstrated numerous advantages over the standard CNC grinding process. Advantages are evident in reduced tool wear, better surface quality, and reduced cycle times due to increased feed rates. These benefits can be seen over numerous applications within the precision optics industry.

Citation Download Citation

Michael J. Cahill, Michael J. Bechtold, Edward Fess, Frank L. Wolfs, and Rob Bechtold "Ultrasonic precision optical grinding technology", Proc. SPIE 9633, Optifab 2015, 96330L (11 October 2015); https://doi.org/10.1117/12.2195977

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