摘要:
A fast axial flow gas transport laser has a discharge tube. The discharge tube has at least one sudden discontinuous enlargement of the cross section of the discharge tube.
摘要:
In machining a workpiece, maximal absorption of laser irradiation in the workpiece is achieved by a minimal interference by optical back-coupling and plasma effects is achieved by continuously determining the actual value of the laser irradiation and continuously sensing stochastic processes taking place in the machining zone and in response to such measuring and sensing, controlling the modulation of laser irradiation.
摘要:
A laser has a beam path multiply folded by two resonator end mirrors and ateast one reflector retroreflectively folding the laser beam. The laser axis is parallel displaced to the axis of a further reflector. In order to improve the laser beam quality while retaining its comparatively low adjustment sensitivity, the beam path is folded at least twice with the retroreflective reflector.
摘要:
Gas laser, particularly carbon dioxide laser, with a component-free gas dharge chamber between high voltage electrodes, with a beam of two resonator end mirrors multiply folded between facing reflectors and with openings of the outwardly sealed gas discharge chamber permitting the inflow and outflow of gas. A gas laser with the aforementioned features is so constructed for the purpose of increasing its efficiency, that there is a continuous gas flow in the gas discharge chamber and that the gas flow direction is parallel to the longitudinal axis of the component-free gas discharge chamber located between the reflectors.
摘要:
A waveguide is arranged in radial extension on a support mounted in rotary manner and whose pivot pin is parallel to the laser beam axis. The outer end thereof intersects the laser beam during a rotation of the support and in each case detects a partial beam of the laser radiation. By means of the waveguide, said partial beam is supplied to a detector, which is arranged in fixed manner in the pivot pin of the support. A hollow waveguide or light guide serves as the waveguide. A parallel displacement of the pivot pin of the support is possible by means of a stepping motor to enable the complete beam profile to be determined by a plurality of sections through the laser beam. In place of the stepping motor, the support can be provided with several waveguides of different lengths, distributed with the same angular spacing over the support circumference and which successively supply the detected partial beams to the same detector.
摘要:
Apparatus for measuring the radiation power of lasers, particularly infrared lasers, with a thermal detector, which supplies a power-caused measurement signal.In order to be able to measure rapid laser radiation power changes, the apparatus is so constructed that there is a device which locally integrates the laser radiation and to which, apart from the thermal detector, is connected at least one further detector, which is able to detect radiation power changes with a larger band width than the band width detectable by the thermal detector and that there is a circuit combining the measurement signals of the detectors.
摘要:
Aerodynamic window for a gas laser, whose active chamber emits a focussed ser beam and is flow connected by means of a beam passage opening with a window chamber connected to a vacuum pump and which has a beam exit opening in an outer area which is preferably under atmospheric pressure. In order to reduce the pumping power necessary for the aerodynamic window and improve the laser beam quality, the window is so constructed that the laser beam emitted by the active chamber has a first focus in the vicinity of the beam passage opening and is deflected onto a focussing mirror arranged in the window chamber and which gives the laser beam leaving the latter a second focus located in the vicinity of the beam exit opening.
摘要:
The invention concerns an arrangement for shaping the geometrical cross-sion of a radiation field of a plurality of solid and/or semiconductor laser, in particular a plurality of diode laser arrays or field arrangements whose beam-outlet openings extend in a direction lying in the x-y plane and whose ray beam is radiated in the z direction, the x, y and z directions establishing a rectangular co-ordinate system, with an optical structure for generating a defined cross-section for a radiation field. The optical structure comprises reflective elements onto which the radiation of the respective lasers or laser field arrangements is guided and at which the radiation is reflected. The arrangement according to the invention is characterized in that each laser or laser field arrangement both in the x direction and in the y direction; and in that the reflection surfaces of the reflective elements are disposed in planes which are mutually offset and/or tilted such that the radiation portions reflected by the reflection surfaces are mutually offset perpendicular to the radiation diffusion direction with respect to the offset of the radiation outlet surfaces.
摘要:
The present invention relates to a process and device for forming and guig the radiation field of one or several solid and/or semiconductor lasers.
摘要:
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.