Coordinate measuring machine and method for determining spatial coordinates on a measurement object
US9684149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2013 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Aug 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/364
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A coordinate measuring machine has a workpiece support for holding a measurement object and a measuring head which can be displaced relative to the workpiece support. The measuring head carries an optical sensor. An evaluation and control unit is configured to determine spatial coordinates on the measurement object depending on a position of the measuring head relative to the workpiece support and depending on sensor data from the optical sensor. The optical sensor includes a lens assembly and a camera. The lens assembly comprises at least four separate lens-element groups. Three of these separate lens-element groups can be displaced along the optical axis of the lens assembly. A first lens-element group is arranged fixed in the region of the light-entry opening of the lens assembly. The coordinate measuring machine with the above-described lens assembly allows individual variation of magnification, focusing and resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.