Block piece for holding an optical workpiece, in particular a spectacle lens, for processing thereof, and method for manufacturing spectacle lenses according to a prescription

摘要

A block piece (10) for holding an optical workpiece, in particular a spectacle lens, and its use are proposed, which comprises a basic body (12) having a central axis (A), a workpiece mounting face portion (14) against which the workpiece can be blocked by means of a blocking material, and a clamping portion (18) via which the blocked workpiece can be fixed in a machine or apparatus for processing it. The clamping portion is adapted to be clamped by forces (F) directed essentially perpendicular to the radial direction to cancel out each other and not deform the basic body.