The specific quality control inspection of green laser pointer is included

green laser pointer  can be commissioned and adjusted for the customer
Wavelength 10.6μm CO2 laser welding of the absorption rate of two orders of magnitude higher than the absorption of the YAG laser wavelength of 1.06μm. Absorption rate, the different wavelengths of laser-produced plasma power density required threshold. YAG laser-produced plasma threshold power density is about two orders of magnitude higher than the CO2 laser. In other words, the CO2 laser processing, easy to produce plasma and its impact, while a smaller impact of YAG laser processing, plasma. Laser beam through the plasma, the change of the absorption and focusing conditions, sometimes the laser beam self-focusing phenomenon. Plasma absorption of light can be transmitted through different channels to the workpiece. It is to guide the implementation of the quality control of green laser pointer .
If the plasma is transmitted to the energy of the workpiece is greater than the plasma absorption caused by the workpiece receiving light losses, the plasma has actually strengthened the workpiece on the absorption of laser energy, then the plasma can also be seen as a heat source. Laser power density in the formation of the plasma near the threshold, the more rarefied plasma gathered at the workpiece surface, the workpiece by the plasma absorption of energy [Figure 3 (a)], when the concentration of materials, gasification and plasma cloud formation and stability Heisei absorption of the so-called laser-sustaining wave. In this case, there will be the plasma formation and disappearance of periodic oscillations [Figure 3 (b)]. Maintain this laser absorption wave easily in the laser welding process, must be suppressed. The workshop notices a lot about the performance control of green laser pointer .
Further increase the laser power density (I> 10 W / cm), and laser processing zones surrounding gas may be breakdown. Laser through the pure gas, the required power density of the gas breakdown is generally greater than 10 W / cm. However, in the vicinity of the laser material, there are some substances in the initial ionization, the original electron density, the breakdown of gas required for power density can be reduced by about two orders of magnitude. Breakdown a variety of gas required for power density and gas thermal conductivity, dissociation and ionization energy. The better the thermal conductivity of the gas the greater the energy loss of heat transfer conductivity, the higher the plasma maintenance thresholds, mean plasma focus state height was lower, less prone to the plasma shielding. The specific quality control inspection of green laser pointer  is included.