Laser pulse modulator
US4815086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Mar 16, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention is directed to the power control of a gas laser being moved by a prime mover along at least two different axes at various speeds to provide effectively constant output power to the workpiece surface. Signals from the prime mover axis representative of the speed of movement of each axis are separately rectified then summed and modulated with a positively offset triangular wave signal. The resulting output signal is a composite width modulated square wave pulse representative of the instantaneous laser output power required to maintain an effective constant power to the workpiece at various speeds and directions of movement of the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.