Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Blendax Gmbh

Aixlens Gmbh

Reinhart Poprawe

Peter Loosen

Keming Du

Dirk Petring

Wolfgang Schulz

Stefan Kaierle

Hans-Georg Treusch

Konstantin Boucke

Edgar Willenborg

Rolf M Klein

Gerd W Herziger

Christian Weingarten

Christian Fornaroli

Axel Von Wallfeld

Uwe Clasen

In a method for the manufacture of a transmissive optical system from a blank, material ablation is achieved on the blank with an ablative laser, and the pulse duration of the ablative laser is less than 1 ns, and preferably lies between 3 fs and 100 fs, or between 100 fs and 10 ps.

Method for producing a transmissive optics

This invention relates to a method for cutting materials using a laser beam, which emerges from a cutting head comprising a cutting nozzle with an inner edge, and is absorbed by the cutting front. The axis of the laser beam is displaced in relation to a workpiece along a cutting line with a fixed orientation in the cutting direction of said workpiece. In this method the position (p) of the cutting head is modulated with regard to its time averaged value, or the laser power and gas pressure in the cutting head are modulated.

Method for cutting materials using a laser beam

The invention relates to a resonator system with at least two folding elements for folding the beam path. Said folding elements serve to restrict the divergence angle of the radiation. The inventive resonator system is further characterized in that the respective folding is caused by reflection on a reflecting surface of the respective folding element. The beam axis of the radiation and the surface normal of the respective reflecting area are positioned at an angle relative to each other that is greater than the critical angle for the total reflection but smaller than the sum of the critical angle for the total reflection plus the divergence angle of the radiation.

Resonator system with at least two folding elements

An optical amplifier arrangement, including an amplifying medium, which exhibits an approximately rectangular cross section with a long edge and a short edge, as well as at least two highly reflecting mirrors, between which the amplifying medium is disposed, whereby the long or the short edge of the cross section is along the X axis or the Y axis; the Z axis is the optical axis; and the X, Y and Z axis form a rectangular coordinate system. The mirrors are designed and arranged in such a manner that one beam, which is to be amplified and beamed in by an oscillator, passes repeatedly through the amplifying medium in the XZ plane and is amplified; and the size of the beam to be amplified in the X direction becomes larger after each passage.

Optical amplifier arrangement for a solid state laser

A method for processing moving workpieces with laser radiation that is focused on a to-be-processed workpiece surface by means of a laser beam that is moved but not relative to the workpiece. The laser beam is focused in a line-like manner and its beam spot corresponds practically exclusively and with full a real coverage to the work piece surface to be processed.

Method and device for treating work pieces with laser radiation

Controlled melting of the tips of bristles is achieved by simple means using a pulsed laser beam operating in the kilowatt range and having a pulse duration in the microsecond range.

Process for rounding bristle tips on brushes

Growing community of inventors

Aachen, Germany

Reinhart Poprawe