A lens processing system used for removing a lens blank (98, 110) from an edging block (40). The system includes an elongated collet (22) that engages the mating edging block (40). The block (40) includes an enlarged groove (41) that receives a pair of blades (65, 66) extended upwardly from the floor (75) of the collet (22). Each lens blank (98,110) is formed to include a series of surface markings (191,192) to verify proper functioning of the edging machine that forms a finished lens. Each lens blank also includes a series of circular markings (117,133) arranged in diagonal rows to verify the accurate drilling of bores with the lens blank (98,110).

A fabrication system may generally comprise an x-y positioning assembly, a clamping head to receive an end effector, wherein the clamping head is coupled to the x-y positioning assembly, a z positioning assembly, a platform including a surface that is rigid and substantially planar, wherein the platform is coupled to the z positioning assembly, and a controller operably coupled to the x-y positioning assembly, end effector, z positioning assembly, and platform. Methods of using the fabrication system are also described.

A hydraulic expansion chuck for receiving a tool includes a chuck body, an expansion bushing which is received in the chuck body and defines a chuck opening, a pressure chamber which is interposed between the expansion bushing and the chuck body, and a reduction sleeve. The reduction sleeve is received in the chuck opening of the expansion bushing and defines a tool holder receptacle for receiving the tool to be chucked. The reduction sleeve includes a connector element configured to releasably attach the reduction sleeve to the chuck body. The reduction sleeve also may include an adjustment element configured to adjust the axial position of the tool in the tool holder receptacle.

A lens processing system used for removing a lens blank (98, 110) from an edging block (40). The system includes an elongated collet (22) that engages the mating edging block (40). The block (40) includes an enlarged groove (41) that receives a pair of blades (65, 66) extended upwardly from the floor (75) of the collet (22). Each lens blank (98,110) is formed to include a series of surface markings (191,192) to verify proper functioning of the edging machine that forms a finished lens. Each lens blank also includes a series of circular markings (117,133) arranged in diagonal rows to verify the accurate drilling of bores with the lens blank (98,110).