High precision glass drilling technology

In the processing of common optical elements，there are many problems in drilling high-precision holes on the glass ceramics with the traditional drilling technology. The common problems are ellipse，decentration，taper and edge cracks et al. To resolve these problems, a new drilling technology was used, and a high-precision inner hole, whose diameter tolerance and coaxiality were 0.01mm, was prepared on a glass ceramic by using a simple drilling machine and a universal cylindrical grinder. The production practice shows that this process is repetitive and steady. The problems existing in the glass drilling were solved and the high-precision inner holes were obtained.