Energy-beam engraving method and an apparatus for carrying it out
AssigneeSteigerwald Strahltechnik GmbH
InventorsPeter Anderl, Monika Geffcken, Joachim Geissler
Life of this patent
Estimating the term…
Abstract
The specification describes an energy-beam engraving method for producing depressions of different dimensions in a surface. In the method depressions with smaller and larger dimensions are produced by shorter and longer action of an energy beam with a substantially constant power. Besides the duration of action of the energy-beam on a predetermined range of the surface to be engraved simultaneously its focussing is so varied that the focus plane is closer to the surface in the case of smaller depressions than with larger depressions.
Claims4
A method of energy beam engraving a workpiece having a workpiece surface comprising the following steps:
- directing an energy beam successively onto a plurality of discrete positions on said workpiece surface, said energy beam being adapted to produce a depression in said workpiece surface the depth and area of which increases with increasing dwell time, controlling the dwell time each position so as to produce smaller depressions and larger depressions, focusing said beam in a focus plane which lies within said workpiece in the vicinity of said workpiece surface, and controlling the focus of said beam so that said focus plane is nearer to the surface during production of said smaller depressions than during production of said larger depressions.
Dependencies are inferred from the claim text.