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:
Sep. 28, 1999
Filed:
May. 27, 1997
Applicant:
Inventor:
Georges Charpak, Paris, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
2503851 ; 250374 ; 250583 ; 378 37 ; 378146 ; 378 98 ; 382132 ;
Abstract
A high resolution radiographic imaging device for medical or industrial radiography includes at least one ionizing particles detector equipped with at least one gas chamber provided with a window for the lateral or frontal inlet of the illumination beam. A first, a second and a third flat electrode are placed in parallel with one another in order to form a conversion space and a amplification space with the distance separating the second and third electrodes being less than 200 .mu.m and the amplitude ratio of the electrical fields created between the second and third electrodes and the first and second electrodes being greater than 10.