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:
May. 21, 2013
Filed:
Dec. 30, 2008
Marko Avikainen, Jyväskylä, FI;
Petri Niemi, Jyväskylä, FI;
Heikki Kettunen, Espoo, FI;
Markku Mäntylä, Kangasala, FI;
Heimo Keränen, Oulu, FI;
Marko Avikainen, Jyväskylä, FI;
Petri Niemi, Jyväskylä, FI;
Heikki Kettunen, Espoo, FI;
Markku Mäntylä, Kangasala, FI;
Heimo Keränen, Oulu, FI;
Metso Automation Oy, Helsinki, FI;
Abstract
Optical radiation sources functioning on different optical bands radiate on different optical bands and focus optical radiation on a region in a web surface as pulses in such a manner that illumination areas of the pulses overlap on the plane of the web. At most one optical radiation band is focused on the web from the direction of the normal. The spatial intensity distribution of at least one optical band differs from the uniform distribution and the intensity distributions of at least two different optical bands differ from one another in a predetermined manner. A camera forms still images of the web surface region on each optical radiation band. An image-processing unit determines the surface topography of the web on the basis of the images. In addition, a controller may control the paper manufacturing process on the basis of the determined surface topography.