Turned down edge: correction with sub-diameter
One of the most common defects during polishing operations or sfericizzazione is the occurrence of the turned down edge. HOW DOES it PRESENTS With “turned down edge” o TDE ( turned down edge) defining a limited circular ring close to the edge of the mirror, which rapidly increases its radius of curvature with respect to the remaining surface
Curvature Correction with Sub-diameter
We saw in a previous article the general operation of the racing technique with sub-diameter. On that occasion, we examined the aspect relating to processing by identifying the zones or circular sectors in which the material removal takes place more or less effectively. Let us now go into more detail about the effects that this process produces
Read More