the emitter of green laser pointer

Laser emission, transmission, and spread a considerable distance in the space attenuation is very small, can make long-distance or inaccessible parts of the welding, laser bending transmission through fiber optics, prisms and other optical methods, deflection, focusing particularly suited to micro-parts and up to the poor parts of the welding. A laser for more than one table to a different job, and can be used for welding, but also for cutting and heat treatment, use of a machine. Laser loss in the atmosphere is small, you can pass through glass and other transparent objects, suitable for welding beryllium alloys, and other highly toxic materials in the sealed container made of glass; laser is not the electromagnetic field, there is no X-ray protection and does not require vacuum protection. The receiver of green laser pointer  is in the status of code pair.
Welding welding difficult to weld materials such as high melting point metal, and even can be used for the welding of non-metallic materials such as ceramics, Plexiglas; after welding without heat treatment, suitable for some materials sensitive to heat input welding. A non-contact welding, the distance near the weld zone is lower than the requirements of arc welding, the fatigue strength of the weld zone is higher than the electron beam. Compared with the electron beam welding, does not require vacuum equipment, but does not produce x-rays, are not subject to magnetic interference. High-power laser welding to expand the application of the main obstacles: the laser is especially high-power CW lasers are expensive; weldments processing, assembly, positioning demanding; laser electro-optical conversion and overall efficiency is very low. So that the receiver only receives the control signal sent out by the emitter of  green laser pointer .
The classification of laser welding and its implementation. Laser welding according to the differences in the way of the laser mode of action on the workpiece or the laser beam output can be divided into pulsed laser welding and continuous laser welding. The former forming a circular solder joints, which form a continuous weld. When pulse welding, the energy input to the workpiece is intermittent pulse. The extensive use of pulsed lasers in pulsed laser welding is a YAG laser. Weld characteristics based on the actual role of the power density on the workpiece or laser welding, laser welding can be divided into the heat conduction welding and deep penetration welding (small hole laser welding) categories.