Cell phone jammer adopts the photoelectric technology

Excellent cut quality with a smooth cutting surface. Cutting surface roughness is not evenly distributed, the measurement location is also no uniform standard, currently used to measure the distance more under the surface of 1 / 3 of the roughness.
Therefore, the use of tapered bore with a small hole of the nozzle tip, the nozzle pressure of oxygen often 3bar below. To further improve the laser cutting speed, according to aerodynamic principles, the pressure in the premise of improving the nozzle does not produce normal shock, nozzle design and manufacture of a zoom, that Laval (Laval) nozzle. Figure 4 can be used to facilitate the manufacture of the structure. Laser Centre, University of Hannover, Germany using 500WCO2 laser, lens focal length 2.5 〃, the use of Laval nozzles and nozzle holes were tested, respectively, shown in Figure 4. The results shown in Figure 5: respectively, NO2, NO4, NO5 nozzle at different oxygen pressure, the cut surface roughness Rz and function of cutting speed Vc. When cell phone jammer adopts RF, the signal will be transmitted through the radio wave.
Vaporization process, the steam melt particles and carry away debris erosion, formation of holes. Vaporization process, approximately 40% of the material turned into steam disappeared, while 60% of the material is in the form of droplets to be rid of the air. When the incident laser beam power density exceeds a certain value, the light beam inside the material at the starting point of evaporation, the formation of holes. Once the hole to form, it will be as bold to absorb all the incident beam energy. Holes are surrounded by molten metal wall, and then, with the auxiliary beam coaxial flow of molten material around the hole away. As the workpiece moves, the direction of synchronous sliding hole formed by cutting a kerf. Continue along the laser beam irradiated the forefront of this crack, continuous or pulse molten material from inside seam to be blown away. General use of inert gas fusion cutting, if replaced by oxygen or other reactive gases, materials in the laser beam irradiation is lit, heated with oxygen to produce another chemical reaction heat, melt the cut is called oxidation.  cell phone jammer adopts the photoelectric technology.