OptoTech Optikmaschinen GmbH
OptoTech Optikmaschinen GmbH Patent applications | ||
Patent application number | Title | Published |
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20120140169 | Method for the Manufacture of Cost-Optimized Spectacle Lenses - A method for manufacture of spectacle glasses from prefabricated blanks without cutting, consisting preferably of plastic or silicate glass, with a front side no to be finished and an opposite back side to be finished by a CNC machine, having at least one optical focus in common, wherein for the finishing of the back side one calculates a prescription surface on the basis of a prescription of a person, describing the vision defects of a left and a right eye, such that the machined back side together with the front side forms a first prescription lens and a second prescription lens, and from these one makes two spectacle glasses, and wherein the focal points of the first spectacle glass correct the vision defect of the left eye and the focal points of the second spectacle glass correct the vision defect of the right eye of the person. | 06-07-2012 |
20120057123 | METHOD FOR PRODUCING COST-OPTIMIZED SPECTACLE LENSES WITH ESPECIALLY ADVANTAGEOUS PROPERTIES FOR THE USER - The invention relates to a method for the production of spectacle lenses from raw lenses prefabricated in a non-cutting manner. The raw lenses have a front side that is not to be reworked and an opposing back side to be reworked with a CNC machine, which sides have at least one optical focal point in common. In order to rework the back side a prescription surface is calculated on the basis of a prescription describing a visual error and of the geometry of the front side. This surface forms a prescription lens in common with the front side, the focal points of which lens correct the visual error. The front side is shaped in such a manner that it is a convex and rotationally symmetrical first freeform surface. This freeform surface is composed in a rotationally symmetrical manner about a middle axis by at least two spherical sections with different radii, whereby the spherical sections border each other tangentially. Furthermore, the spectacle lens has an optical center through which an eyeglass wearer looks when looking straight ahead (zero view direction). The spectacle lens is manufactured in such a manner by an adaptation of the raw lens to an eyeglasses frame that the middle axis of the raw lens lies outside of the optical center of the spectacle lens. | 03-08-2012 |