laser pointer has different output types

 The rubber is also very common to be the body material of laser pointer .
Laser welding usually requires a certain issue from one focus of the laser power density at the center spot is too high, to evaporate into the hole. Leave the laser focus of the plane, the power density distribution is relatively uniform. Defocus in two ways: positive and negative defocus defocus. Focal plane at the top of the workpiece is out of focus, and vice versa for negative defocus. Geometrical optics theory, when the issue from an equal positive and negative, corresponding to approximately the same power density on the plane, but in fact obtained pool of different shapes. Negative defocus, the availability of greater penetration, which is the formation of the pool. laser pointer has different output types.
Experiments show that the laser heating 50 ~ 200us material begins to melt, the formation of liquid metal and the emergence of sub-vaporization asked to form a city-pressure steam, and high speed jet, a dazzling white light. At the same time, high concentrations of vapor to liquid metal movement to the pool edge, the formation of sag in the center pool. When the negative defocus, the material internal surface area is higher power density, easy to form a stronger melting, vaporization, so that light passes to the deeper material. So in practice, when required penetration depth is large, the use of negative defocus; welding thin materials, it is appropriate is out of focus. Including welding, side welding, fusion welding center through the center hole 4 kinds of fusion welding process method. Including wire and wire welding, cross welding, lap welding parallel, T-4 kinds of welding process method. This kind of laser pointer has the function of turning over the page.
Laser welding can be successfully used to achieve wire connection with lumped elements, block elements can be any size. Should be noted that in welding filamentous component geometry. Different types of metal welded to solve weldability and solderability parameter range. Laser welding between different materials, only certain combinations of materials possible. Some components of the connection should not be used laser welding, but can use the laser as a heat source, the implementation of soldering and brazing, laser welding also has the advantage. Brazing using a variety of ways in which the laser is mainly used for soldering printed circuit board soldering, especially useful in chip component assembly. Some laser pointer have the function of black screen.
Laser soldering compared with other methods has the following advantages: because it is local heating element is not easy to produce thermal damage and heat affected zone is small, it can be implemented in the vicinity of the thermal component soldering.