The quantity computation of green laser pointer should be accurate enough

The quantity computation of green laser pointer should be accurate enough. As the aluminum on the wavelength of 10.6 um CO2 laser with high reflectivity and thermal conductivity, so very difficult to cut from aluminum, steel, its laser cutting needs more than the energy density of the laser beam to overcome the threshold, the formation of the initial hole cutting process started, once this vaporization cavity formation, it is like steel, like the laser has a great absorption rate. According to China has been cutting experience, due to intense chemical reaction and oxidation of titanium, oxygen cutting process can lead to over-burning spray, spray compressed air should be adopted so as to ensure the quality of titanium cutting. Laser Cutting Ti-6Al-4V titanium alloy components, cutting speed, cutting-edge do not need polishing, trimming the bottom of a little sticky residue, it is very easy to remove. Copper and aluminum is similar to the CO2 laser with high reflectivity and high thermal conductivity of copper due to its high reflectivity, with the CO2 laser cutting speed is very slow. Brass (copper alloy) to be used when cutting with higher laser power, auxiliary gas using air or oxygen. Nickel-base alloys can be laser cut, with the alloy composition of the different cutting speed is about the same thickness of the cutting speed cutting of stainless steel 0.5-1.0 times. The accurate quantity computation of green laser pointer is needed.
Non-metallic material is 10.6 μm wavelength absorption of CO2 laser beam of a good body, because of its small thermal conductivity, heat conduction losses are small, almost all the incident light beam can absorb energy and quickly evaporate the material, since in the spot light at the formation of the beginning of holes into the cutting process of a virtuous circle. Poor thermal conductivity, and almost no plastic ceramic materials, usually cold, thermal processing is very difficult. Laser cutting ceramics and metal cutting oxygen to help very different mechanisms, it is controllable fracture orientation. When the laser beam along a predetermined cutting direction when heated in a small area around the points of light caused by direct heating and the resulting gradient generated by high mechanical stress. This high stress that these brittle ceramic materials, the formation of small cracks. As long as the appropriate process parameters and control, cracks along the beam direction of movement will keep strict form, so the material cut. Microelectronic devices such as the use of corundum materials, laser beam with a 250W power can be precisely cut out in the specified parts of the required size, cut-free particles tearing, does not require subsequent treatment. Figure 2-42 that cutting l mm thick ceramic films of A12O3 laser process parameters relationship. Ceramic cutting the use of smaller laser output power. Under the control of different power, cutting speed in a wide range of options. Tests showed that in conditions of continuous CO2 laser beam, not to use high-power, otherwise, would cause the material to crack leaving irregular cutting failure. Turbine engine for the hard and brittle ceramics (such as silicon nitride), the laser cutting speed 10 times higher than the cutting wheel, both no tool wear and tear, and can cut out any shape. The accurate quantity computation of 200mw laser pointer has to be ensured.