Abstract: The current invention relates to a lens surfacing assembly and a method for grinding and polishing glass or plastic optical lenses. The assembly is primarily intended for use with a rigid lapping tool and a typical lens grinding machine. The lens surfacing assembly comprises a strippable adhesive member that is attached to the lapping tool for use throughout the grinding and polishing operation for attachment of a reversible, double sided lens surfacing pad having a coarse surface on one side and a fine surface on the other. After the grinding has been completed, the reversible pad is removed and a polishing cloth is attached to the adhesive member. The combined thickness of the pad and the adhesive member is equal to the compensation designed into the radius of curvature of the lapping tool arcuate surface. The combined thickness of the polishing cloth and the adhesive member is also equal to the compensation designed into the lapping tool.

Abstract: An alignment device of the type primarily intended for use in combination with an ophthalmic cylinder surfacing machine to insure proper optical axis alignment of the lens blank, to the lap, as it is being ground. The device includes a base member which is fitted into the lap-retaining table of the surfacing machine and a top member which is fitted onto the pins of the pin holder of the machine. An open circuit including an audible or visual signal is mounted within the base member, and electrical contacts for the circuit are disposed on the base's upper surface. Corresponding electrical contacts are disposed on the bottom of the top member so that when the top is placed in contiguous, overlying relationship to the base, if the alignment of the machine is properly adjusted, the electrical circuit will be completed resulting in either an audible or visual signal to the operator that the machine is ready for use.