摘要:
Provided is a blank contacting element (20) adapted for a use with a vacuum blocking piece (10) suitable for vacuum blocking a lens blank (12), wherein the blank contacting element (20) is fluid-permeable and characterized in that at least an upper surface (22) of the blank contacting element (20), which is adapted to contact the lens blank (12), is made of an elastic material.
摘要:
The invention relates, among other things, to the provision of a set (68) of eyeglass-lens semifinished products composed of at least three series (66-1, 66-2, 66-3) of eyeglass-lens semifinished products having spherical or rotationally symmetric aspherical front surfaces. The series (66-1, 66-2, 66-3) of eyeglass-lens semifinished products differ in pairs in the base material of said series. The base materials have different average indices of refraction. Each of the series (66-1, 66-2, 66-3) comprises, within an actual surface refractive-power range of the front surface thereof in relation to a standard index of refraction of 1.53 between 3.2 D and 6.7 D, at least three types (No. 7, No. 10, No. 13) of eyeglass-lens semifinished products, which types differ in pairs and the front-surface shapes of which types are designed differently in some way. Within said actual surface refractive-power range of the front surface of the series in relation to a standard index of refraction of 1.53 between 3.2 D and 6.7 D, the front-surface shapes of said at least three types (No. 7, No. 10, No. 13) are identical on a central partial surface (which preferably comprises more than 40%, more preferably more than 50% of the total front surface) or the entire front surface of the type for all of the at least three series (66-1, 66-2, 66-3).
摘要:
The invention relates to a polishing tool (100) for surfaces of spectacle lenses and casting mould shells for spectacle lenses with a polishing lip (118) which comprises a rigid support (110) and has a polishing face (120), which has at least one uninterruptedly annular toric portion. It is provided according to the invention that an elastic body (114) and a polishing covering (116) are arranged on the rigid support (110). The invention also relates to a method and a device for polishing surfaces of spectacle lenses and to casting mould shells for spectacle lenses with such a tool.