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. 07, 2020
Filed:
Oct. 08, 2018
Applicant:
Arcam Ab, Moelndal, SE;
Inventors:
Calle Hellestam, Goeteborg, SE;
Mattias Fager, Onsala, SE;
Assignee:
Arcam AB, Moelndal, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06T 7/00 (2017.01); H01J 37/22 (2006.01); B33Y 30/00 (2015.01); B33Y 40/00 (2015.01);
U.S. Cl.
CPC ...
G06T 7/001 (2013.01); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); H01J 37/222 (2013.01);
Abstract
A method for detecting electron beam filament wear in an electron beam source, the method comprising the steps of: enlarging a beam spot emanating from the electron beam source on a work table to a predetermined minimum size, capturing an image of the beam spot on the work table by a camera, comparing the captured image of the beam spot with a reference image, and detecting filament wear if the captured image is deviating more than a predetermined value from the reference image.