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. 30, 1992
Filed:
Feb. 19, 1991
Applicant:
Inventors:
Wolfgang Knuepfer, Erlangen, DE;
Monika Mengel, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2504861 ; 2504831 ; 2502 / ;
Abstract
An output luminescent screen for an x-ray image intensifier has a carrier on which a phosphor, embedded in a bonding agent, is applied. The phosphor is a terbium-activated gadolinium oxysulfide (Gd.sub.2 O.sub.2 S:Tb)luminophore. The average grain size of the phosphor is between 1.7 .mu.m and 2 .mu.m, with no more than 15%, preferably 10%, of the grains of the phosphor being larger than 3.5 .mu.m, and 85% through 95%, preferably 90%, of the phosphor grains being larger than 1.1 .mu.m. Zinc cadmium sulfide in a proportion up to 80% may be aded to the phosphor.