The laser beam and material interaction mechanism

Currently, the accepted principle of laser processing are two: namely laser thermal processing and photochemical processing (also known as cold). Laser thermal processing means that when the laser beam to the surface, causing rapid heating, thermal properties of the object changes or the material melting evaporation. Thermal processing of high energy density laser beam (which is to focus on the energy flow), irradiation in the surface to be machined on the surface absorb the laser energy, heat generated in the irradiated region to stimulate the process, so that surface (or coating ) temperature rise, resulting in abnormal, melting, ablation, evaporation and other phenomena. Do all the led flash light  have the USB drive function?Photochemical processing means that when the laser beam is added to an object, high-density energy photon trigger or control the processing of photochemical reactions. Cold with a high load energy (UV) photons to break material (especially organic material) or the chemical bonds within the surrounding medium, to make the material non-thermal process damage occurred. This cold processing laser tag has a special significance, because it is not thermal ablation, but do not have a "thermal damage" side effects, break chemical bonds of the cold strip, and thus be processed in the surface layer and in the vicinity do not produce heat or thermal deformation and so on. We can produce  green laser pointer  according to customers’ requirement.For example, the electronics industry in the use of excimer laser deposition of chemicals on the substrate film on the semiconductor substrate out of the narrow slot. About the first edition of the laser processing is laser processing laser system most commonly used applications. The laser beam and material interaction mechanism can be roughly divided into the laser processing and laser thermal processing of processing two types of photochemical reactions. Laser thermal processing is the use of a laser beam projected onto the surface thermal effects to complete the process, including laser welding, laser cutting, surface modification, laser marking, laser drilling and micro-processing; photochemical process is the laser beam exposure to the object, using high-density high-energy photons lead or control the photochemical reaction process.The prices for  green laser pointer  with different volume are different. Including photochemical deposition, stereolithography, laser etching. As the laser with high brightness, high directivity, high color and high coherence of the four characteristics, we give the laser processing method of processing to bring some of the other features are not available. Because it is non-contact processing, no direct impact on the workpiece, so no mechanical deformation; laser processing no "tool" wear and tear, no "cutting force" acting on the workpiece; green laser pointer processing, laser beam energy density, processing speed fast, and is the local processing of non-laser irradiated sites with no or minimal impact. Therefore, the heat-affected zone is small piece of hot deformation processing minimum follow-up; easy to guide the laser beam, focused to achieve the direction of change, easily and with numerical control system, processing of complex parts so it is an extremely flexible processing methods; high production efficiency, stable and reliable processing quality, economic and social good. The receiver of  green laser pointer  looks like a USB drive.Laser processing of advanced manufacturing technology, as has been widely used in automotive, electronics, appliances, aviation, metallurgy, machinery manufacturing, and other important sectors of national economy, to improve product quality, labor productivity, automation, pollution, reduce material consumption, etc. play a more an important role. The second edition of the principle of laser processing of laser processing is laser beam to the workpiece surface, high-energy laser to cut, melt, and change the surface properties of materials.