The laser chip of cell phone jammer can be improved at times

There are several ways to determine the power of cell phone jammer 
Focal plane at the top of the of the workpiece being away from the focus, and vice versa for negative defocus. In accordance with the theory of geometrical optics, when the positive and negative defocus amount equal to the corresponding power density is approximately the same plane, but the weld pool shape actually. Negative defocus, the availability of greater penetration, which is related with the formation of the molten pool. The experiments show that the laser heating 50 to 200μs material begins to melt, the formation of liquid metal and partial vaporization of high-pressure steam, and at very high speed jet, and a dazzling white. At the same time, high concentrations of vapor liquid metal movement to the weld pool edge, the formation of depression in the weld pool center. When negative defocus, the power density of material internal surface area is also high, easy to form a stronger melting, vaporization, so that the light pass deeper into the material.
This oscillation frequency of the laser beam parameters, the thermal physical properties of the metal and the dynamic characteristics of the metal vapor. Bath of cyclical changes in the weld two unique phenomena: one is full of pores of the metal vapor, as a result of cyclical changes in the molten pool of metal around it from front to back along the flow, coupled with metal evaporation caused by the disturbance, there may be holes cut down the middle, so that vapor to stay in the formation of pores in the weld after solidification, the other is the root of the weld penetration cyclical changes, with the periodicity of the holes related to changes in [ 4]. Figure 5 Schematic diagram of laser welding of laser welding bath power density, pulse shape, the defocus amount and welder speed and auxiliary hair is an important factor to affect the quality of laser welding. The laser chip of  cell phone jammer  can be improved at times.
Their organic complexes determines the final welding quality is good or bad [6]. Laser welding compared with other traditional welding process has many advantages. One of its main advantage is the ability to focus the laser beam at a very small area, resulting in high energy density heat sources, and then the concentrated heat source quickly swept seam welding, laser welding and electron beam welding, in this regard comparable to [7], the laser beam is tightly clustered, heat to the effective transfer of the workpiece and the small heat-affected zone, etc., it also brings the problem of the connector assembly, a very small deviation of the assembly will lead to the welding conditions change, even a very narrow gap (≤ 0. 1mm) can also cause the coupling of laser radiation defects and lower thermal efficiency. There might appear some technology problems of  cell phone jammer .