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:
Mar. 20, 2001
Filed:
Aug. 21, 1998
Applicant:
Inventor:
Franz Kappeler, Puccheim, DE;
Assignee:
AGFA-Gevaert Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/10 ; H01S 3/00 ; H01S 3/08 ; H01S 3/082 ;
U.S. Cl.
CPC ...
H01S 3/10 ; H01S 3/00 ; H01S 3/08 ; H01S 3/082 ;
Abstract
The invention concerns a method of operating a laser diode (,) producing a beam (,) whose intensity is controlled by a control signal and which is directed along a first beam path (,) at the target surface (,), stray reflections from the target surface (,which are unstable with respect to the diode (,) in time and/or space acting on the diode (,). An element (,) which is stable in time and with respect to the diode (,) in space is used to feed part of the light emitted by the diode back along a second beam path (,) to the active zone (,) of the diode (,) so that the diode (,) is kept in a state of coherence collapse.