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:
Apr. 16, 1985
Filed:
Dec. 10, 1982
Paul J Bjorkholm, Sharon, MA (US);
American Science and Engineering, Inc., Cambridge, MA (US);
Abstract
Dual energy imaging develops simultaneous signals from transmitted energy of different characteristics. The detector includes two serially arranged detectors. A first detector preferentially absorbs lower level radiant energy and the second detector preferentially absorbs higher radiant energy. The detectors may be identical in which case the preferential characteristic is developed by reason of the detector's position. Alternatively, the characteristics of the detectors may be selected to produce the desired effect, e.g. a gaseous detector may be pressurized in accordance with its function, a scintillating screen may be tilted or its length may be selected to produce the desired absorption characteristic.