Laser engraving device for workpiece cylindrical mantle surface - has annular focussing mirror with curved mirror surface

摘要

The engraving device uses a laser light source (8) and a controlled beam deflector (5,6) allowing the laser beam to be deflected onto a focussing mirror (3) in dependence on the characters to be engraved. The focussing mirror (3) comprises a rotationally symmetrical annular mirror or mirror section, with a current mirror surface (4) in the plane containing the axes of symmetry (16). Pref. the axis of symmetry (16) for the focussing mirror (3) coincides with the axis of symmetry of the workpiece mantle surface (13). The workpiece is pref axially offset along the axis of symmetry (16) of the mirror (3). ADVANTAGE - Reduced mechanical complexity.