Invention Grant
- Patent Title: Method and apparatus for determining at least one of dimensional or geometric characteristics of a measurement object
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Application No.: US15999119Application Date: 2018-08-16
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Publication No.: US10458784B2Publication Date: 2019-10-29
- Inventor: Franz-Georg Ulmer , Christian Hoerr
- Applicant: CARL ZEISS INDUSTRIELLE MESSTECHNIK GMBH
- Applicant Address: DE Oberkochen
- Assignee: CARL ZEISS INDUSTRIELLE MESSTECHNIK GMBH
- Current Assignee: CARL ZEISS INDUSTRIELLE MESSTECHNIK GMBH
- Current Assignee Address: DE Oberkochen
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: DE102017118767 20170817
- Main IPC: G01B11/25
- IPC: G01B11/25 ; G01B11/00

Abstract:
3D coordinates at first selected measurement points of a measurement object are determined using a first measurement arrangement. Surface normals at second selected measurement points of the measurement object are determined using a second measurement arrangement. Using the 3D coordinates and the surface normals, at least one of dimensional or geometric characteristics of the measurement object are determined. The second measurement arrangement includes a number of light sources and a first camera which is directed to the measurement object. A calibration data set represents individual direction dependent radiation patterns of the light sources. The surface normals are determined using the calibration data set and the 3D coordinates at the first selected measurement points.
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