Abstract: The invention relates to a device for influencing a laser beam by means of an adaptive mirror (12) in the beam path, having a piezoelectric adjusting member (17) arranged on the back of the mirror (12), it being the case that, in order to achieve low-aberration deformation of the mirror (12) for the purpose of influencing the divergence of the beam, there is provided between the adjusting member (17) and the back (24) of the mirror (12) a pressure-transmitting device (19) which acts on a large area of the deformable surface of the mirror (12).

Abstract: In order to improve a laser amplifying system comprising a plate-like solid-state body which has two oppositely located flat sides and comprises a laser-active medium, a cooling member with a support surface which is arranged so as to face one of the flat sides of the solid-state body and with which this flat side is thermally coupled for the discharge of heat, in such a manner that an optimum coupling takes place it is suggested that the flat side of the solid-state body be coupled mechanically and thermally to the support surface by an adhesive layer which is produced from an adhesive which passes from a liquid state into a solid, cross-linked state essentially invariant in volume and that the adhesive layer have an active adhesive layer area with a heat resistance of less than 10 K×mm2/W.

Abstract: In order to improve a powder coating arrangement for the application of melted coating powder onto a substrate, comprising a preparation unit for generating a flow of coating powder, a powder applicator head, from which the flow of coating powder issues and spreads in the form of a directed jet of powder towards the substrate, a melting zone, through which the flow of coating powder passes in a direction of passage, and an optical beam guidance system, which directs a laser beam generated by a laser onto the melting zone to melt the coating powder, such that the coating powder may be essentially completely melted before impact on the substrate, it is proposed that the melting zone is arranged in the powder applicator head, and that the optical beam guidance system is equipped with several elements for reflecting the laser beam, which permit the laser beam to pass several times through at least one heating zone for the flow of coating powder in the region of the melting zone transversely to the direction of pa