laser pointer has to get the certification of laser pointer at first

laser pointer has to get the certification of laser pointer  at first.
The late 1980s, kilowatt-class laser successfully applied to industrial production, now has a large-scale production line of laser welding in the automotive industry, automotive manufacturing outstanding achievements. Germany, Audi, Mercedes-Benz, Volkswagen, Volvo of Sweden and other European car manufacturers as early as the 1980s were the first to use laser welding roof, body, side boxes, and sheet metal welding, 90 years of U.S. General Motors, Ford and Chrysler Chrysler's race to the introduction of laser welding automobile manufacturing, despite the late start, but growing fast. Italy's Fiat, in most steel components used in laser welding assembly, welding, Japan's Nissan, Honda and Toyota Motor Corporation in the manufacture of body panels are used in laser welding and cutting processes, laser welding of high strength steel assembly because of its excellent performance in automotive body manufacturing increasingly used, according to American Metal Market Statistics, the end of 2002, the laser welding of steel consumption will reach 70 000t 3-fold increase over 1998. The certification of laser pointer is the important check item of laser pointer .
According to the automotive industry volume, characterized by a high degree of automation, laser welding equipment to high-power, multi-style direction. In the process, the U.S. Sandia National Laboratory and Pratt Witney joint in the laser welding process, add powdered metal and wire of the study, Bremen, Germany, Institute of Applied Beam Technology in the use of laser welding of aluminum alloy body frame in a lot of research that the weld is added to fill more than help to eliminate hot cracking, increased welding speed, solve the problem of tolerance, the development of the production line at Mercedes-Benz plant have been put into production. Laser welding in the electronics industry, especially in the microelectronics industry has been widely used [12]. As the weld heat affected zone of laser focus on rapid heating, thermal stress is low, which are integrated circuits and semiconductor devices encapsulated in the shell, showing the unique advantages of the research and development in a vacuum device, laser welding has been applied, such as molybdenum focus electrode and the stainless steel support ring, fast hot cathode filament components. The member discount of laser pointer is only valid during this month.70 years is mainly used for welding thin materials and low-speed welding, the welding process is heat conduction, that is, laser radiation heating surface, the surface heat transfer driven by internal heat diffusion, by controlling the laser pulse width, energy, peak power and repetition rate and other parameters , so that the workpiece melt to form a specific pool. The customer asks the manufacturer to treat the surface of laser pointer carefully.Good direction means that the beam divergence angle small. Small divergence of the laser, the beam spot size is small, high power density, suitable for laser welding. High-quality laser output divergence angle of laser full-width is generally (1 ~ 3) × 10 ˉ 3 rad, deliberately carried away from the laser laser laser welding operation arrival. The high brightness laser show laser power density, which is required for laser welding material.