Sensor system for directly calibrating high power density lasers used in direct metal laser melting
US11007604B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2018 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Sep 8, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A three dimensional printing system includes a laser system, a beam splitter, a pinhole, a sensor, and a controller. The laser system emits a light beam of varying diameter carrying at least 100 watts of optical power along an optical path. The laser has an imaging plane along the optical path which can be coincident or close to a focal plane at which the beam has a minimum diameter. The beam splitter is positioned along the optical path to receive the beam and to transmit most of the optical power and to reflect remaining optical power. The pinhole is positioned along the optical path at the imaging plane to receive the reflected beam having a minimal diameter. The controller is configured to analyze a signal from the sensor to determine intensity and distribution parameters for the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.