公开(公告)号：US20020113975A1

公开(公告)日：2002-08-22

申请号：US10003333

申请日：2001-10-31

Applicant: Metso Paper Automation Oy

Inventor： Hannu Komulainen ,  Jaana Hakkarainen ,  Keijo Lehmikangas

IPC: G01B011/30

CPC classification number: G01B11/303

Abstract: The invention relates to a method and a measuring arrangement for determining roughness of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the depth of focus of the image, which affects the measurement of roughness. Roughness of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.

Abstract translation: 本发明涉及一种用于确定纸或纸板的粗糙度的方法和测量装置。 纸张或纸板表面用与纸或纸板表面法线基本平行的准直光照亮。 通过反射光辐射从纸或纸板表面产生图像。 反射光辐射用于将纸或纸板表面的图像产生到相机检测器表面的像素上，每个像素对纸或纸板表面的微米级的区域进行成像。 设置在相机前面的孔用于调整图像的焦深，这影响了粗糙度的测量。 基于相机检测器表面上的像素的强度来测量纸或纸板的粗糙度。

公开(公告)号：US20020114494A1

公开(公告)日：2002-08-22

申请号：US09953384

申请日：2001-09-14

Applicant: Metso Paper Automation Oy

Inventor： Hannu Komulainen ,  Jaana Hakkarainen ,  Keijo Lehmikangas

IPC: G06K009/00

CPC classification number: G01B11/303 ,  G01N21/57

Abstract: The invention relates to a method and a measuring arrangement for determining gloss of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the incidence angles of the reflected radiation, which affects the measurement of gloss. Gloss of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.

Abstract translation: 本发明涉及一种用于确定纸或纸板光泽度的方法和测量装置。 纸张或纸板表面用与纸或纸板表面法线基本平行的准直光照亮。 通过反射光辐射从纸或纸板表面产生图像。 反射光辐射用于将纸或纸板表面的图像产生到相机检测器表面的像素上，每个像素对纸或纸板表面的微米级的区域进行成像。 设置在照相机前面的孔用于调节反射辐射的入射角，这影响了光泽的测量。 根据相机检测器表面上像素的强度来测量纸张或纸板的光泽度。