This model of laser pointer can be used in the specific location

This model of laser pointer can be used in the specific location.
Pulse perforation: (Pulse drilling) use of high peak power pulsed laser to melt or vaporize a small amount of material, commonly used as an auxiliary air or nitrogen gas to reduce oxidation of the hole due to heat expansion, the gas pressure when the oxygen pressure than cutting small. Each laser pulse produced only a small spray particles, gradually in-depth, so the plate perforation takes a few seconds. Once the piercing done, immediately replace the oxygen assist gas for cutting. This smaller diameter hole, the hole quality is better than blasting perforation. This not only to be used in lasers with higher output power; more importantly, when time and space characteristics of the beam, it is generally transverse flow CO2 laser cutting laser can not meet the requirements. In addition, the pulse must have perforated more reliable pneumatic control systems, in order to achieve gas species, gas pressure control switch and perforation. The store should renew some featured products of laser pointer . 
Described as follows: the material surface in the laser beam irradiation was quickly heated to ignition temperature, followed by intense with oxygen combustion, emit heat. Role in this heat, the material formed within the holes filled with steam, while the holes around the walls surrounded by molten metal. Burning mass transfer of oxygen into the slag and metal control the burning rate, and oxygen diffusion through the slag to reach the speed of the ignition front also has a great influence the combustion rate. The higher the oxygen flow rate, combustion chemistry and the faster removal of slag. Of course, the oxygen flow rate is not as high as possible, because the flow rate too fast will lead to the exit slit of metal oxide reaction products that rapid cooling, which is the cutting quality is unfavorable. Clearly, the oxidation process of cutting the existence of two melting heat, and oxygen that laser irradiation can produce a chemical reaction with the metal heat. The shipping description of laser pointer should be stated clearly.Laser cutting technology is to get rid of the traditional mechanical cutting, heat treatment, cutting like a new cutting method, higher cutting accuracy, lower roughness, more flexible methods of cutting and higher productivity and so on. Laser drilling method as holes in solid materials processing methods, has become an application-specific processing technology has mainly used in aviation, aerospace and microelectronics industries. To the principle of laser mole is that the laser in an instant burst of color organizations put tremendous energy, and break the pigment decomposition, it can be swallowed by macrophages out, and then be excreted with the lymphatic circulatory system, thus achieve the purpose of the pigment to remove. Laser mole can be applied to many types of moles, such as including the three mentioned above nevi, nevus, port wine stains, etc., effects are obvious, and not easy to scars, the risk is small.