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The Characteristics of the Laser
publié le 23/08/2017 à 12:19 |
Early laser vibration welding used in the automotive industry is a combination of laser technology and lightweight components, which can be used to solve the above-mentioned problems without the need for filler. The traditional laser vibration welding, collimated beam through the uniaxial vibration, through the focus lens focused spot with the welding head with the workpiece relative to the movement, the formation of a certain amplitude, frequency and offset of the weld; 2-axis galvanometer System vibration welding is through the control system to form a vibration weld, the need for higher costs.
Unlike the CO2 laser, the laser power used in the UV blue laser pointer panel splitting device is slightly lower and the maximum power 15W can be reached, while the CO2 laser is up to 50W or higher. In addition, our UV laser device parameters are easy to tune. When machining thick plates, you can adjust the laser power to 15W. And when machining flexible materials, you can also reduce the laser power to 1W-3W. When the processing of flexible material or a specific plastic, you can also use the laser scanning, microsecond delay control between each scan to ensure proper cooling of heat affected zone, thus avoiding the one-time energy implementation of huge heat generated in the products above the agglomeration, this heat affected by near control wire protection components.
Based on the traditional three-color laser developed white laser, and photonic crystal fiber laser, in the coherence of a serious lack of loss of many excellent characteristics of the laser, it can not be as an independent, true sense of the laser light source, we can only It is classified as white laser category. When the white laser really have all the characteristics of the 300mw laser pointer, and has the traditional laser does not have the advantages of the characteristics of time, in a wider range of scientific research, production applications play a white laser role.
In recent years, the use of two-color laser field in the air to stimulate the plasma wire to produce strong terahertz radiation method with its high efficiency, has been widespread concern. The microscopic physical mechanism of this method to produce strong terahertz radiation is mainly described by the ionization current model and the nonlinear four-wave mixing model. A large number of previous studies have shown that such terahertz radiation sources are a single-cycle broadband pulse. Such as the realization of the radiation pulse of the parameters (including the radiation angle distribution, carrier envelope phase, pulse energy, etc.) precision control, will be able to fully expand its application space, to play its application value.
The technique involves exposing the sample to intense pulses of the most powerful laser, but the photon energy is much lower than the electron energy emitted from the material. There is a very large electric field associated with such a pulse, which will result in an electron passing through the quantum tunnel from the top of the valence band to the bottom of the electron conduction band, thus creating holes in the electron conduction band. Electrons and holes are driven by the electric field to reach high momentum in the opposite direction. The electric field itself is oscillating, and both the electrons and the holes undergo a reverse and aggregation when the field is transformed.
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