Abstract: An adjustable optical arrangement includes an optics mount, an optical element held at the optics mount, a holding structure having a ball joint for receiving the optics mount, a ball joint holding the optics mount at the holding structure, a first adjustment device configured to pivot the optics mount with respect to the holding structure about a first axis, and a second adjustment device configured to pivot the optics mount with respect to the holding structure about a second axis. The ball joint is disposed between the optical element and the first and the second adjustment device.

Abstract: A laser processing head, by means of which lenses in the beam path of the laser beam may be interchanged for the purposes of changing the beam diameter at the workpiece, wherein the laser processing head may have a structurally simple and compact embodiment.

Abstract: A laser processing head, by means of which lenses in the beam path of the laser beam may be interchanged for the purposes of changing the beam diameter at the workpiece, wherein the laser processing head may have a structurally simple and compact embodiment.

Abstract: A beam shaping unit for focusing a divergent laser beam includes a first optical element to receive the laser beam, a second optical element to receive the beam from the first optical element, an optical focusing unit to receive the beam from the second optical element, a first focal point adjustment device coupled to the first optical element, the first focal point adjustment device being configured to adjust the beam focal point diameter by manipulating the first optical element, and a second focal point adjustment device coupled to the second optical element, the second focal point adjustment device being configured to adjust, in the beam propagation direction, the beam focal position by manipulating the second optical element, and in which the beam shaping unit is configured to image the beam from the first optical element through an intermediate focal point onto the second optical element.

Abstract: A beam shaping unit for focusing a divergent laser beam includes a first optical element to receive the laser beam, a second optical element to receive the beam from the first optical element, an optical focusing unit to receive the beam from the second optical element, a first focal point adjustment device coupled to the first optical element, the first focal point adjustment device being configured to adjust the beam focal point diameter by manipulating the first optical element, and a second focal point adjustment device coupled to the second optical element, the second focal point adjustment device being configured to adjust, in the beam propagation direction, the beam focal position by manipulating the second optical element, and in which the beam shaping unit is configured to image the beam from the first optical element through an intermediate focal point onto the second optical element.

Abstract: A beam shaping unit for focusing a divergent laser beam includes a first optical element to receive the laser beam, a second optical element to receive the beam from the first optical element, an optical focusing unit to receive the beam from the second optical element, a first focal point adjustment device coupled to the first optical element, the first focal point adjustment device being configured to adjust the beam focal point diameter by manipulating the first optical element, and a second focal point adjustment device coupled to the second optical element, the second focal point adjustment device being configured to adjust, in the beam propagation direction, the beam focal position by manipulating the second optical element, and in which the beam shaping unit is configured to image the beam from the first optical element through an intermediate focal point onto the second optical element.

Abstract: An adaptive lens system for laser materials processing, for example, in the high-power range of at least approximately 1 kW, includes two deformable lens surfaces spaced apart from each other in the direction of the optical axis, a chamber formed between the two lens surfaces and filled with a fluid, and a device for changing the distance between the two lens surfaces along the optical axis.

Abstract: An adaptive lens system for laser materials processing, for example, in the high-power range of at least approximately 1 kW, includes two deformable lens surfaces spaced apart from each other in the direction of the optical axis, a chamber formed between the two lens surfaces and filled with a fluid, and a device for changing the distance between the two lens surfaces along the optical axis.

Abstract: In an operating arrangement for a gas change valve of an internal combustion engine including an electromagnetic structure having an armature which is connected to the valve and which forms an operating piston disposed in a cylinder for reciprocating movement therein between an upper end position in which the valve is closed and a lower end position in which the valve is open, at least a first electromagnet is arranged adjacent the lower end position of the armature for retaining the armature when the electromagnet is energized, a spring is provided for biasing the valve to a closed position and electro-pneumatic means are provided for supplying gas under pressure to an operating chamber at one side of the piston for actuating the piston in a valve opening direction.

Abstract: A vacuum pump unit including a secondary pump sub-assembly (6) rotated by an electric motor M2 and applying suction to a chamber to be evacuated (1), and a primary pump sub-assembly (2) rotated by an electric motor M1 and whose suction is connected to the output of the secondary pump sub-assembly (6), the unit being characterized in that it includes an electronic control circuit (7) for controlling the speed of rotation of the electric motor M1 as a function of to the current I2 drawn by the electric motor M2.

Abstract: A device for induction heating of the inside of cylinder liners of reciprocating-piston engines to a transformation temperature, for the purpose of hardening. An inductor head is equipper with an aligning device designed as a spreadable cage which is equipped on the outside with clamping bars, clamping bosses a clamping shells which can be applied free from play and under the effect of force against the inner surface of the cylinder liner. The inductor loop is also displaced radially and brought into the working position by means of these clamping shells. Heating and hardening is carried out only with the inductor head in the clamped and exactly aligned state, whereas, after the clamping shells and the inductor loops have been released, a further indexed movement of the inductor head is possible. The work is carried out at relatively high alternating-current frequencies in the range between 400 and 500 kHz and at relatively high energy densities in the range above 5 kw/cm.sup.2 .

Abstract: The invention relates to a mechanical vacuum pump having a displacement member (2) and a casing (1) which is provided with an inlet channel (3) on the suction side and an outlet channel (4) on the discharge side. A spring-loaded non-return flap valve (5) is incorporated into the outlet channel (4). Upstream of this flap (5), a gas jet pump (7, 8) is installed in the outlet channel (4), the jet direction being parallel to the sealing surface of the non-return flap valve (5).This gas jet pump allows to significantly increase the final vacuum of the mechanical vacuum pump and to improve the cooling of the pump.

Abstract: A molecular high-vacuum pump has a bell-shaped rotor 5 including a shaft supported by roller bearings 12, 13 disposed inside the bell rotor. The stator 1, 6 defines two converging pumping stages, one in cooperation with the inner cylindrical surface 10 of the rotor and the other in cooperation with the outer cylindrical surface 9 of the rotor. The suction inlet 3 is disposed in the apex area 4 of the bell rotor. The discharge outlet 11 of the pump is disposed in the vicinity of the lower rim of the bell, and both pumping stages transfer gases towards this rim. In this way, gases introduced through the inlet 3 into the pump cannot penetrate into the motor space 15 and damage the bearings of the pump.

Abstract: An optically stable resonator producing a laser beam which by the use of a converging and of a diverging optical element is subdivided into an amplifier part with large beam diameter and small energy density and into a mode filter part with small beam cross section and correspondingly small Fresnel number all with a short structural length of the resonator. The advantage of the present invention resides in the high beam quality of the produced beam which contains predominantly only the fundamental mode, and in the small thermal load of the participating elements, especially of the decoupling window. The subdivision of the stable resonator according to this invention into an amplifier part and into a load filter part opens up to this resonator type power output ranges which were precluded heretofore by reason of a maximum permissive thermal load of the decoupling window.