device for heating at least two elements by means of laser beams of high energy density
AssigneeLeister Process Technologies
InventorsJie-Wei Chen, Christiane Leister
Life of this patent
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Abstract
A process and a device for joining or separating various workpieces, in particular made of plastic or plastic and other materials, by means of curtain-like laser beams. To join workpieces in a particular joining area of the contact surface, a mask, made of a laser-impermeable material, is arranged between the laser source and the workpieces to be joined. The laser beam and the mask are moved relative to each other. To generate high energy density in the joining area, laser beams of at least two diode lasers are brought together, and subsequently, differing laser line lengths are generated by means of a zoom optics arrangement.
Claims4
A device for selective heating of at least two materials which comprises:
- laser beams, with a mask made of a material impermeable to radiation arranged between a radiation source and the materials, with regions having been removed from said mask, with the laser radiation passing through said regions to selected heating regions of the materials arranged below the mask, with all heating regions being heated by irradiation, thus leading to the joining or separation of the materials, and with relative movement between one or several laser beams and the materials taking place;
- including at least two diode lasers for generating high energy density at the contact surface of a laser beam concentration device for bringing together the laser beams, as well as an adjacent zoom optics arrangement for generating different laser line lengths.
Dependencies are inferred from the claim text.