Body for abrasive surface grinding, lapping or polishing of optical surfaces has recesses in its own surface sunk in at edges relative to center

摘要

The body for surface grinding etc. has recesses in its own surface sunk in at the edges relative to its center. The recesses may be in the form of grooves, the depth of which at the edges is at least five times, preferably ten times, the groove depth in the center of the groove, at which point it is greater than the average grain size of the material used for the grinding etc.