The working principle of the optical fiber laser marking machine<br/>The optical fiber laser marking machine is made of ytterbium doped double clad fiber as the laser medium, so that the high power fiber laser can get the beam output near the diffraction limit. The optical fiber laser is used as the base film output. The focusing spot diameter is 10 microns, and the laser beam light path is controlled by the computer to control the high speed scanning mirror to change the laser beam light path to achieve automatic marking. Laser marking is not force, non-contact, and has little effect on the quality of the product. After marking, the font quality is stronger.<br/>The advantages of optical fiber laser marking machine:<br/>1. no consumables, low cost after use<br/>2. less maintenance times, which will reduce maintenance costs.<br/>3., the speed of marking is fast, and the damage to products is almost nothing.<br/>The 4. standard is widely used for ordinary metals and alloys, rare metals and alloys, metal oxides, special surface treatment, crystal, plastic and so on.<br/>5. for flat surface and concave convex surface can be marked.<br/>6., marking is more precise. For small marking products, a small number and LOGO can be seen clearly.<br/>7. tens of thousands or more more per second. The speed of marking is convenient and fast. It can be used for large-scale production.<br/>8. it can be used in production line, because the laser can be controlled by computer with predictable range and precise speed.<br/>9., you can make typesetting on the computer without making templates, which can reduce the processing cost.<br/>10. fiber laser marking machine is compact and convenient, and the space occupied by stereo is small.<br/>11. fiber laser marking machine has a long service life and is not easy to damage.<br/>Fiber laser marking machine has 10W/20W/30W three kinds of universal power, the greater the power, the faster the carving speed, the better the quality of the carving, of course, the selection of optical fiber laser marking machine can not only from the angle of power, but also from the specific marking material, according to the effect you want to choose the best quality, the lowest cost fiber laser marking. machine<br/>Temperature is the physical quantity of the degree of cold and heat of an object, microcosmic is the intensity of the thermal motion of an object. It is well known that all the molecules and atoms around us are conducting an irregularly regular heat movement, and the essence of our refrigeration is to reduce the intensity of the overall thermal movement of these molecules or atoms. Laser welding machine.<br/>First, quantum mechanics suggests that an atom can only absorb a photon of a particular frequency and change its momentum. The Doppler effect points out that the wave is higher in frequency when the wave source moves to the observer, and the frequency decreases when the source is far away from the observer. When opposite to the photon movement, the frequency of this photon will increase, and the frequency of the photon decreases when the direction of the atom moves in the direction of the photon is the same, and then the other physical principle is that the light has no static mass but has momentum. Then we can build the excitation by combining the above several physical properties. A simple model of light cooling.<br/>The frequency of a laser is adjustable in a certain range, and when the frequency of a laser is adjusted to a slightly lower than an atomundefineds absorptive frequency, there will be an unexpected result. When such a beam of light is irradiated to a particular atom, this happens. If the atom moves toward the laser beam, the Doppler is due to the light. The effect is that the frequency of the photon increases, and the frequency of the original laser photon is just slightly smaller than the absorbable frequency of the atom, then the Doppler effect is just absorbed by the atom, and this absorption is a change of momentum. The transition to the excited state and the momentum decrease, so the kinetic energy decreases. And for the other moving atoms, the corresponding photons do not increase, so they cannot absorb the photons in the laser beam, so there is no momentum to increase this phenomenon, as is the same as kinetic energy. When the atom is irradiated with the same angle, the momentum of the atom in the different direction of motion decreases and the kinetic energy decreases. And since the laser only reduces the momentum of the atom, after a period of time, the momentum of most of the atoms will reach a very low level, thus achieving the purpose of refrigeration.<br/>But the scope of this technology is mostly used for atomic cooling, and for molecules it is difficult to cool it to ultra low temperatures. But supercooled molecules are more important than supercooled atoms, because their properties are more complex. At present, the method of cooling the molecules is to combine the supercooled alkali atoms together to produce a double base molecule. Xue once cooled SrF to a few hundred degrees.<br/>2. another kind of laser refrigeration, also known as anti Stokes fluorescence refrigeration (AntistokesFluorescentCooling), is a newly developed concept of refrigeration. Its basic principle is the anti Stokes effect, using the energy difference between the scattering and the incident photon to realize refrigeration. The anti Stokes effect is a special scattering effect, which scatters the fluorescence photon wave. As the wavelength of the incident photon is shorter, the energy of the scattering fluorescence photon is higher than the incident photon energy. The process can be simply understood as: the light emitting medium is excited by the low energy laser photon, the high energy photon is scattered by the luminescent medium, and the original energy in the luminescent medium is brought out to be cooled. For the purpose of cooling power, the scattering of anti Stokes fluorescence is heat carrier.