Ultra Precision Surface Grinding for Large Scale Non-Axisymmetric Aspheric Lens

Abstract

Ultra precision grinding is currently the main technology for large scale advanced optical lens machining. In this paper, the machining system of ultra precision surface grinder is investigated. The experiments of new wedged aspheric lens with the dimension of 430*430mm have been conducted by SD600 diamond wheel, and the parallel grinding, cup truing and on-machine measuring are used for good accuracy. The results show the effective machining system and the problem for next research.

Simulation analysis of grinding wheel motion trajectory on SiC ceramics aspheric surface grinding

“…Compared with other materials, SiC ceramics has great advantages in terms of performance and is an ideal material for high-performance aspherical elements [1] . In traditional machining method, three processes including grinding process, lapping process and polishing process are needed which lead to a long processing cycle [2][3][4] . Therefore many researchers are conducted into the area that how to improve the form accuracy and surface damage in order to reduce the machining allowance of the last two process.…”