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:
Jan. 16, 1996
Filed:
Mar. 29, 1993
Applicant:
Inventor:
Kenji Baba, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 37 ; 372 88 ;
Abstract
In an ion laser generator, an electromagnet must produce a sufficiently strong magnetic field throughout the length of the bore where plasma must be converged, and the magnetic field intensity at the end surface of the cathode must not exceed a certain limit. If the magnetic field intensity at the cathode is too strong, the plasma is converged on an area of the cathode and destroys the cathode at the area. A magnetic shield member is provided at an end surface of the electromagnet facing to the cathode for shielding the cathode surface from the leakage flux.