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US 2010/0060905 A1Published application
Method and system for measuring the shape of a reflective surface
AssigneeIsra Surface Vision GmbH
InventorStephan WIENAND
Life of this patent
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AssigneeIsra Surface Vision GmbH
InventorStephan WIENAND
Estimating the term…
The invention describes a method for measuring the shape of a reflective surface (14) and a corresponding system which has at least one pattern (15) for reflection at the reflective surface (14) and at least one camera (1) for viewing the pattern (15) which is reflected at the surface (14) pixel by pixel, wherein the position and orientation of the camera (1) and of the pattern (15) are known. In order to reliably measure the shape of reflective surfaces with a small amount of equipment complexity, the viewing directions of the camera (1), which are known for the pixels (8), and the positions of the pattern (15), which correspond to the mapping of the reflected pattern (15) to pixels (8) of the camera (1), are used to determine the surface angle and surface height for the purpose of measuring the shape.
A method for measuring the shape of a reflective surface (14) with a system which comprises at least one pattern (15) for reflection at the reflective surface (14) and at least one camera (1) for viewing, pixel by pixel, the pattern (15) which is reflected at the surface (14), wherein the position and the orientation of the camera (1) and of the pattern (15) are known, characterized in that from the viewing directions of the camera (1), which are known for the pixels (8), and the positions of the pattern (15), which correspond to the mapping of the reflected pattern (15) on the pixels (8) of the camera (1), the surface angle and the surface height are determined for the purpose of measuring of the shape.
A method for calibrating a system which comprise a pattern carrier (2) with a pattern (15) for reflection at a reflective surface (14), and a camera (1) for viewing, pixel by pixel, the pattern (15) which is reflected on the surface (14), characterized in that for calibrating two large-area, plane mirror surfaces (5, 6) are used in a parallel arrangement, and/or that the mirror surface (5, 6) is generated by means of a liquid.
A system for measuring the shape of a reflective surface (14) which comprises at least one pattern carrier (2) for generation of a pattern (15), which can be reflected on the reflective surface (14), at least one camera (1) for viewing, pixel by pixel, the pattern (15) which is reflected on the surface (14), and an evaluation unit for evaluation of the camera images (8) for shape determination and/or calibration, characterized in that the system comprises a device (4) for arrangement of a large-area, plane mirror surface (5, 6), wherein the mirror surface is preferably formed by a liquid.
Dependencies are inferred from the claim text.