Jenoptik Automatisierungstechnik Gmbh

Juergen Weisser

Stefan Acker

Ronny Ullmann

Martin Griebel

Walter Lutze

Norbert Preuss

Hans-Ulrich Zuehlke

Gabriele Eberhardt

Karsten Heinig

Sebastian Nawrodt

Christian Matthies

Gisbert Staupendahl

Process for producing a line of weakness in a cover element comprising at least one slit. This slit is produced through a plurality of machining cycles in which a pulsed laser beam is guided in each instance over the cover element along an imaginary line so that the energy of the laser pulses is introduced into the cover element. The slits are produced in two segments. More energy is introduced over the machining cycles in the first, comparatively short segments than in the second, comparatively long segments. The residual wall below the slits decreases with each machining cycle until the first residual wall segment thickness in the first segment is so small that energy portions transmit through the first residual wall segment and are detected by a sensor arrangement arranged downstream. Accordingly, the first residual wall segment thickness is detected, and inferences can be drawn from this about the second residual wall segment thickness.

Process for producing a line of weakness in a cover element through removal of material

The invention is directed to an apparatus and a method for generating separating fissures in a substrate through action of a laser beam having an elliptical beam cross section with a beam spot length in a movement direction along a separating fissure to be generated in the substrate. The apparatus and method are particularly suitable for separating fissures which start or end on the substrate surface. A suitable diaphragm prevents radiation from impinging on the substrate before the start and after the end of the fissure.

Apparatus and method for generating separating fissures in a substrate

The invention is directed to a method for generating optically perceptible laser-induced cracks in brittle material, wherein a laser beam, followed by a coolant jet, is guided relative to the surface of the brittle material in order to advance a crack trail into the material starting from an initial crack, and wherein a marking agent which penetrates into the crack during the formation of the crack so as to make the latter visible is mixed with the coolant.

Method for generating optically perceptible laser-induced cracks in brittle material

Flat workpieces of brittle material be severed in a time-saving manner by an arrangement according to the invention by inducing thermomechanical stresses by laser radiation, particularly along severing lines in the same orientation in alternating directions, in that the arrangement has two coolant nozzles which selectively direct coolant to the workpiece and which, preferably coupled with optical means for shaping the laser beams, are mounted so as to be rotatable around the axis of the laser head.

Arrangement for severing a flat workpiece of brittle material multiple times by means of a laser

The invention is directed to a beam-shaping unit for generating a beam bundle which is focused in a punctiform manner, propagates in a ring shape, and has a radiationless central area, comprising a focusing lens, a first axicon and a second axicon, and to an arrangement with a beam-shaping unit of this kind for introducing radiation energy into a workpiece comprising weakly absorbent material which is arranged between a first resonator mirror and a second resonator mirror. The first resonator mirror which is arranged in front of the workpiece in the radiating direction is located in the radiationless central area. The radiation energy can be absorbed to the maximum extent by repeatedly passing through the same interaction volume in the workpiece.

Beam formation unit comprising two axicon lenses, and device comprising one such beam formation unit for introducing radiation energy into a workpiece consisting of a weakly-absorbent material

A device for welding a plurality of thermoplastic plastic parts (parts to be joined) forming a hollow body with an opening by a laser, comprising a vacuum holder having a vacuum chamber which communicates with a vacuum pump, is open on one side and, together with the hollow body, forms a closed chamber that can be evacuated. When a vacuum is applied, the vacuum holder holds the hollow body stationary, holds the joined parts together and enables testing of the tightness of the weld.

Growing community of inventors

Jena, Germany

Juergen Weisser