Method and apparatus for laser marking a continuously moving workpiece
US5605641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1995 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | May 23, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/066
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser marking apparatus and method for laser marking workpieces to be marked, which are continuously fed without stopping the workpiece each time, thus raising production efficiency. Therefore, the laser marking apparatus comprises a laser oscillator (1); a first polarizer (3) for polarizing a laser beam from the laser oscillator (1) and raster-scanning the laser beam; a mask (6) capable of displaying a specified pattern which selects the laser beam to be raster-scanned by the first polarizer (3) and admits the laser beam to pass therethrough; and a second polarizer (9) for further polarizing the raster-scanned laser beam which has passed through the mask (6) and irradiating the pattern onto a surface of a workpiece to be marked, the second polarizer (9) being provided with a reflection mirror (10) for reflecting the laser beam which has passed through the mask (6), and a movable lens (13) for receiving the laser beam from the reflection mirror and irradiating the laser beam onto the workpiece (8) to be marked, the movable lens (13) being mounted on a moving mechanism (15). The laser beam is irradiated to perform marking on the workpiece (8) while moving the movable lens (13) in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.