Block for mounting lens on edge bevelling grinder - uses adhesive to fix lens on circle radial teeth forming discontinuous bearing face

摘要

The rigid block (1) is used to mount an optical lens (7) on a machine (6) during edge trimming and bevelling, the lens being secured by an adhesive placed on a discontinuous annular bearing surface (2). The bearing surface may be defined by a circle of radial teeth (2') projecting at uniform centres from the relevant block face. There may be thirty six teeth in all with inter-tooth notches (3) being of a bevelled type some 0.3 to 0.6 mm deep and with summit angles of 40 to 80, pref. 50 degrees. The teeth may extend for 1 mm in the radial direction and their edges (4) may be rounded, the bearing surface being defined by a conical surface with openings.