laser pointer has some strict requirement towards the production

laser pointer  has some strict requirement towards the production.
Come to rely on the number of dissolved depth of the laser energy density corresponding to the organic polymer has been dissolved by the laser are given. Come into contact with solid dissolved with femtosecond laser is very short will be able to complete the dissolution process, so this process as a solid direct gasification (or solid direct liquefaction). This time, the lattice is heated in 1ps, the result is an object into a gaseous or plasma state, followed by rapid diffusion in a vacuum. The thermal conductivity of the entire process in the first approximation, be ignored. Practice is confirmed by the femtosecond laser processing and is able to provide a precise and clean process to the metal (and other solid) processing. The blue laser beam light is emitted from the blue  laser pointer .
(2) lattice temperature, is written in integral form. The equation describes the heat of the molten metal by the laser in the next. When the condition is satisfied, the electron temperature is stable, then (11) can be simplify. Ignored, we get formulas show that. In the the femtosecond environment, the lattice temperature remains far less than the electron temperature. This allows us to ignore the lattice temperature in the formula (10). When the conditions are met, (10) and (12), the analysis becomes very simple. In this case, due to energy transfer to the lattice, leading to electron cooling. The electron temperature and lattice temperature after laser irradiation by the formula. We note that the lattice in the laser irradiation can reach temperature but also determined by the electron cooling time.  laser pointer  is not very stable compared with the red laser pointer.
After the laser irradiation, the lattice temperature and theoretically attainable lattice temperature is basically the same. Under the conditions of the femtosecond and picosecond (7) and (13), the lattice temperature equation is the same. Therefore, given the conditions of strong evaporation (8) (9), the pulse energy density threshold and dissolved depth did not change. In this case, in the picosecond range, the dissolution depth and laser energy on the number is still valid. In our derivation, have ignored the solute electronic thermal conduction. On the assumption that it is very rough description of the picosecond range laser dissolved metal. Under these conditions the laser dissolution is accompanied by electronic thermal conduction within the metal melt region formation. The wavelength of the green laser beam light of  laser pointer is 532nm.laser pointer  is efficient is burning the match
Nevertheless, the surface area, we will continue to evaporate as direct gasification by the solid (or solid direct liquefaction), changes in the internal liquefaction only reduce the accuracy of the dissolution process (see next). Nanosecond laser dissolved in this brief discussion, the following kinds of conditions to meet. So, electronic and lattice temperature there, (1-3) simplifies to a variety of experimental and theoretical studies have indicated that the laser would be heated metal target. Within the scope of this laser, the laser energy is absorbed before heating the metal surface to the melting point, and then to the evaporation temperature. Than the melt, the metal evaporation requires more energy. In the whole process, import the solutes in the heat transfer occurs when energy is missing. The green laser beam light of laser pointer  is much easier to be affected and influenced by the ambient condition.