A device for positioning the national phase of a roughing of optical glass and a device for laying centered of an adapter on a roughing

摘要

The invention proposes a device (10) for the accurate positioning of a blank (12) of optical glass with respect to a plane surface (16) carrying the trace of at least one reference point (o) and a centering marker (p), and on which the blank (12) rests horizontally, and of the type comprising an optical sighting device (22) adapted to the - the top of the flat surface (16) which is substantially perpendicular to the reference point (o), characterized in that it comprises means (24, mx, my) for controlling the position of the optical center of sight (0) of the sighting device (22) with respect to the plane surface (16), according to at least one horizontal direction (dx, dy), so as to be aligned vertically, the optical center of sight (0) with the centering marker (p) as a function of the difference (ex, ey), according to this direction, between the centering marker (p) and the reference point (o).