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:
May. 22, 2001
Filed:
Nov. 13, 1998
Diffractive optical system with synthetic opening and laser cutting device incorporating this system
Applicant:
Inventors:
Jean-Paul Grandjean, Sabran, FR;
Patrick Meyrueis, Strasbourg, FR;
Bernard Kress, Neubourg, FR;
Patrice Twardowski, Strasbourg, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G02B 2/744 ; G02B 2/746 ; G02B 5/18 ; G02B 3/08 ;
U.S. Cl.
CPC ...
G02B 2/744 ; G02B 2/746 ; G02B 5/18 ; G02B 3/08 ;
Abstract
An optical device for focusing a light beam. The device includes a Fourier diffractive element that can separate an incident beam into n beams along n directions which are symmetric about an optical axis. The device also includes a diffractive element including n Fresnel lenses capable of refocusing the n beams onto the optical axis. The device may be used with lasers and laser cutting devices.