Laser material processing distance gauge
US11014194B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2017 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Sep 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for distance gauging in laser material processing includes a source of laser-radiation, an electrically-conductive focusing assembly, a constant-current source, and a voltmeter. The focusing assembly focuses laser-radiation towards an electrically conductive workpiece being processed. The focusing assembly and the workpiece form a capacitive sensor. The constant current source provides a constant electrical current to the focusing assembly for a constant time. The focusing assembly and the workpiece are separated by a distance that is proportional to a change in voltage measured on the focusing assembly during the constant time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.