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:
Aug. 23, 2005
Filed:
Aug. 27, 2003
Tero Eklin, Espoo, FI;
Mikko Krapu, Helsinki, FI;
Tero Eklin, Espoo, FI;
Mikko Krapu, Helsinki, FI;
Oxford Instruments Analytical Oy, Espoo, FI;
Abstract
A measurement device and method are provided for OES measurements in air. An arc electrode () has a certain thickness and a pointed end having a certain grinding angle. Holding means () hold the arc electrode () at a certain distance from the material to be measured. A voltage and current supply () generates and maintains a voltage between the arc electrode and the material to be measured and supplies current through the arc. Focusing and detection optics () collect and detect optical radiation. The thickness of the arc electrode () is between 3 and 10 mm and the grinding angle is between 50 and 130 degrees. The arc distance is between 0.5 and 3 mm. An ignition spark voltage is between 5 and 20 kV, an arc voltage between 20 and 160 V and an arc current between 1 and 10 A. The focusing and detection optics () collect and detect at least optical radiation on a wavelength of 193 nm.