Device and method for detecting scratches
AssigneeIsra Surface Vision GmbH
InventorsArmin Rudert, Ulrich Pingel
Life of this patent
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Abstract
The invention relates to a device and a corresponding method for detecting scratches on the surface (2) of a material, in particular glass. Said device comprises an illumination unit (3) and a recording unit (4), which register a scanning line (6) on the surface (2) of the material and can be displaced in relation to said surface (2). In order to more accurately identify scratches, the illumination unit (3) comprises at least one light strip (9), which generates parallel light pools transversally to the scanning line (6), said pools being diffuse or quasi-diffuse along the scanning line (6) and preferably at least one light source (16), which generates a diffuse or quasi-diffuse light transversally to the scanning line (6).
Claims16
A device for detecting scratches on a surface (2) of a material, in particular glass, said device comprising an illumination device (3) for illuminating the surface of the material and a reception device (4), which detect a scanning line (6) on the surface (2) of the material and which are displaceable relative to the surface (2) of the material;
- and
- wherein the illumination device (3) includes at least one light strip (9), which generates parallel light transversely to the scanning line (6), and at least one light source (16), which generates diffuse or quasi-diffuse light transversely to the scanning line (6), and
- wherein the at least one light source (16) is located on a respective end face of the at least one light strip (9), and the at least one light source (16) has at least one lamp (11) located in a normal plane of the scanning line (6).
A method of detecting scratches on a surface (2) of a material with a scratch detecting device, wherein said scratch detecting device comprises an illumination device (3) for illuminating the surface of the material and a reception device (4), which detect a scanning line (6) on the surface (2) of the material and which are displaceable relative to the surface (2) of the material, the illumination device (3) including at least one light strip (9) for generating parallel light transversely to the scanning line (6) and at least one light source (16) for generating diffuse or quasi-diffuse light transversely to the scanning line (6), the at least one light source (16) being located on a respective end face of the at least one light strip (9) and the at least one light source (16) having at least one lamp (11) located in a normal plane of the scanning line (6), said method comprising the steps of:
- a) illuminating the surface (2) of the material with said illumination device (3), which is arranged so that the surface (2) of the material is illuminated with said diffuse or said quasi-diffuse light from two non-parallel directions;
- b) positioning said illumination device (3) so that no light from the illumination device (3) enters the reception device (4) when the surface (2) of the material is flawless;
- and
- c) detecting the surface (2) of the material along a scanning line (6) with said reception device (4).
Dependencies are inferred from the claim text.