| 摘要 |
<p>The optical touch probe has a first target at the distal end thereof on the contact element in a standard probe. The probe is mounted to a video camera of an optical coordinate measuring machine to image the target on the camera. Movement and position of the target in the X and Y coordinates is indicated by the machine's computer image processing system. A second target is mounted to the proximal end of the probe and indicates movement and position in the Z coordinate. The second target may obscure a photodetector, but preferably is parfocused on the camera by light beam parallel to the X,Y plane. Preferably there are two second targets illuminated by orthogonal beams parallel to the X,Y plane. Rotation around the Z axis then may be calculated by the computer when star probes are used. Auto changing racks are also disclosed for holding multiple probes, a probe holder, and lenses for selective mounting on the camera. <IMAGE></p> |
