Suche nach „[Maurer] [Roland]“ hat 22 Publikationen gefundenSuchergebnis als PDF
F: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Maschinenbau und MechatronikI: Hochschulleitung und -einrichtungen
Strategies for grinding optical free-forms using ball-shaped grinding wheels
SPIE Optifab, Rochester, NY, USA
The demand for non-spherical surfaces and free-forms is steadily growing. Aspherical lenses can reduce the number of necessary lenses in optical systems e.g. used for lithographic devices for production of microprocessors. Parabolic mirrors can be used to focus light beams highly efficiently because of low absorption rates without colour distortion. Combined optical devices with included mechanical functions for assembly reduce necessary production steps. The most common pre-machining method for small numbers of high-precision lenses and mirrors is grinding. Depending on the required shape there are different options for generating surfaces e. g. spheres, parabolic mirrors or combined forms. The most flexible ones are grinding with (i) workpiece and ball-shaped tool rotating and (ii) fixed workpiece with ball-shaped tool rotating. In this manuscript grinding strategies dealing with meander and spiral tool paths are investigated in order to define which strategy works best for machining off-axis parabolic mirrors.