Method and apparatus for 3-dimensional measurement of the surface of an object
First Claim
1. A method for 3-dimensional measurement of the surface of an object, comprising the following steps:
- A1) 2-dimensional imaging of the object, at a first focal distance of a CCD camera, which can be swiveled in two directions and which is provided with an optical zoom function B1) selecting at least one point to be measured on the surface of the object C1) determining the direction vector of a laser beam directed with its center onto a point to be measured on the surface of the object D1) detecting the light spot generated by the laser beam on the surface of the object by means of the CCD camera E1) aligning, at a second focal distance longer than that used in step A), the optical axis of the CCD camera toward the center of the light spot generated on the surface of the object F1) determining the direction vector of the optical axis of the CCD camera G1) calculating, within a reference coordinate system, the effective 3-dimensional coordinates of the point marked by the center of the light spot on the surface of the object from the two direction vectors of the laser beam and the optical axis of the CCD camera, allowing for the relative arrangement of CCD camera and laser projector H1) repeating steps C1) to G1) for all points selected in step B1).
1 Assignment
0 Petitions
Accused Products
Abstract
In a method for 3-dimensional measurement of the surface of an object, the object is imaged 2-dimensionally, at a first focal distance of at least one CCD camera (3, 30), which can be swiveled in two directions and which is provided with an optical zoom function, and at least one point (P1, P2) to be measured is selected on the surface of the object, onto which point the laser beam (L) is directed. The optical axis of the at least one CCD camera (3, 30) is aligned in zoom mode at long focal distance toward the light spot generated by the laser beam. The coordinates of the selected point are ascertained by using the direction vectors, determined by appropriate rotary position sensors, of the laser beam and of the optical axis of a CCD camera or by using the direction vectors of the optical axes of two CCD cameras aligned toward the light spot.
14 Citations
21 Claims
-
1. A method for 3-dimensional measurement of the surface of an object, comprising the following steps:
-
A1) 2-dimensional imaging of the object, at a first focal distance of a CCD camera, which can be swiveled in two directions and which is provided with an optical zoom function B1) selecting at least one point to be measured on the surface of the object C1) determining the direction vector of a laser beam directed with its center onto a point to be measured on the surface of the object D1) detecting the light spot generated by the laser beam on the surface of the object by means of the CCD camera E1) aligning, at a second focal distance longer than that used in step A), the optical axis of the CCD camera toward the center of the light spot generated on the surface of the object F1) determining the direction vector of the optical axis of the CCD camera G1) calculating, within a reference coordinate system, the effective 3-dimensional coordinates of the point marked by the center of the light spot on the surface of the object from the two direction vectors of the laser beam and the optical axis of the CCD camera, allowing for the relative arrangement of CCD camera and laser projector H1) repeating steps C1) to G1) for all points selected in step B1). - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
2. A method for 3-dimensional measurement of the surface of an object, comprising the following steps:
-
A2) 2-dimensional imaging of the object, at first focal distances of respectively two CCD cameras, each of which can be swiveled in two directions and each of which is provided with an optical zoom function B2) selecting at least one point to be measured on the surface of the object C2) aligning a laser beam with its center toward a point to be measured on the surface of the object D2) detecting the light spot generated by the laser beam on the surface of the object by means of both CCD cameras E2) aligning, at respective second focal distances longer than those used in step A2), the optical axis of both CCD cameras toward the center of the light spot generated on the surface of the object F2) determining the direction vectors of the optical axes of both CCD cameras G2) calculating, within a reference coordinate system, the effective 3-dimensional coordinates of the point marked by the center of the light spot on the surface of the object from the two direction vectors of the optical axes of the CCD cameras, allowing for the relative arrangement of the two CCD cameras H2) repeating steps C2) to G2) for all points selected in step B2)
-
Specification