Method and device for the controlled machining of a workpiece
US10695863B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Aug 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/026
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for controlled machining of a workpiece includes focusing a laser light beam on a target point of the workpiece to generate a laser focus point. An optical distance measuring device gathers measuring data to determine a distance between the target point and a laser target optics. The workpiece is positioned in relation to the laser focus point based on the distance measuring data gathered. The distance measuring device is a confocal optical distance measuring device having a measuring light source for generating a measuring light and having a variable-focal-length measuring lens system. The focal length of the variable-focal-length measuring lens system is varied over time to gather distance measuring data at different focal length values of the variable-focal-length measuring lens system. A device for controlled machining includes a laser light source, a laser target optics, a distance measuring device, a positioning device, and an evaluation and control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.