Surface and Sub-Surface Integrity of Ultra-Machined BK7 using Fine and Coarse Grained Diamond Wheels

摘要

This paper aims to evaluate the surface and sub- surface integrity of optical glasses which were correspondingly machined by coarse and fine-grained diamond grinding wheels on Tetraform 'C' and Nanotech 500FG. The experimental results show that coarse- grained diamond grinding wheels are capable of ductile grinding of optical glasses with high surface and sub-surface integrity. The surface roughness values are all in nanometer scale and the sub-surface damages are around several micros in depth, which is comparative to those machined by fine-grained diamond wheels.