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:
Nov. 13, 2012
Filed:
Jul. 07, 2006
Wilhelmus Gerarda Maria Nelissen, Venray, NL;
Herman Philip Godfried, Amsterdam, NL;
Evert Pieter Houwman, Linden, NL;
Paulus Adrianus Cornelis Kriele, Mill, NL;
Johannes Cornelis Lamers, Duiven, NL;
Gerrit Jan Pels, Arnhem, NL;
Bartholomeus Mathias Van Oerle, Nijmegen, NL;
Paulus Geradus Hendricus Maria Spaay, Wijchen, NL;
Mark Robin Mcclymont, Wokingham, GB;
Christopher John Howard Wort, Wantage, GB;
Geoffrey Alan Scarsbrook, Ascot, GB;
Wilhelmus Gerarda Maria Nelissen, Venray, NL;
Herman Philip Godfried, Amsterdam, NL;
Evert Pieter Houwman, Linden, NL;
Paulus Adrianus Cornelis Kriele, Mill, NL;
Johannes Cornelis Lamers, Duiven, NL;
Gerrit Jan Pels, Arnhem, NL;
Bartholomeus Mathias Van Oerle, Nijmegen, NL;
Paulus Geradus Hendricus Maria Spaay, Wijchen, NL;
Mark Robin McClymont, Wokingham, GB;
Christopher John Howard Wort, Wantage, GB;
Geoffrey Alan Scarsbrook, Ascot, GB;
Element Six Limited, Ballasalla, GB;
Abstract
A single crystal diamond element having a convex surface is disclosed, the convex surface including a spherical segment for which the maximum peak to valley deviation from a perfect spherical surface is less than about 5 μm. Alternatively or in addition, the RMS deviation from a perfect spherical surface may be less than about 500 nm, or the RMS roughness less than about 30 nm. A single crystal diamond element with a radius of curvature less than about 20 mm is also disclosed. In one aspect a single crystal diamond element having a conical half-angle greater than about 10° is described. The invention also provides a method for forming a rotationally symmetrical surface on a single crystal diamond element, comprising rotating the element about a first axis, applying a laser beam to the element in a direction perpendicular to the first axis, and translating the laser beam in two dimensions in a plane perpendicular to the direction of the beam. If the two-dimensional path follows the arc of a circle a spherical surface may be formed. The invention also provides improving a spherical surface on a single crystal diamond element by pressing a rapidly rotating cup onto a slowly rotating element. The element may be a lens, in particular a solid immersion lens.