The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2004
Filed:
Apr. 15, 2002
Lutz Gottschald, Meerbusch, DE;
Jochen Wagner, Asslar, DE;
Loh Optikmaschinen AG, , DE;
Abstract
A process for edge-machining an optical (spectacle) lens including preliminary machining of an edge of the lens rotatable in controlled manner about a rotational axis of a workpiece by a first edge-machining tool adjustable radially relative to the rotational axis of the workpiece, whereby the lens is given a circumferential contour which corresponds to the circumferential contour of a lens holder apart from a slight degree of oversizing, contactless measurement of the preliminarily machined lens edge, and finish-machining of the lens edge, taking account of the detected edge data of the preliminarily machined lens, by means of a second edge-machining tool adjustable radially relative to the rotational axis of the workpiece, whereby the lens is provided with a circumferential contour substantially complementary to the circumferential contour of the lens holder. During preliminary machining of the lens edge, an edge surface which is definedly matt in the dry state is produced and then the dry or dried surface is measured by means of a measuring arrangement comprising a laser and a video camera and operating in a particular way without contact, in order to determine the edge data of the preliminarily machined lens with increased accuracy and markedly quicker than hitherto.