Laser fine processing

by:Caodahai     2021-09-26
For a laser fine processing system, in addition to the laser, the construction of the entire system platform and software control are also important issues. Any shortcoming in one aspect is enough to affect the performance of the entire system. In terms of software, ordinary marking software can no longer meet the needs. There are many problems that do not need to be considered in nanosecond pulse marking. How to overcome the first pulse and corner leakage is before us. In terms of hardware, as the positioning accuracy of the current better galvanometer can only reach the level of 10u0026mu;m, it is difficult to be qualified for finer processing. Therefore, a slower and high-precision displacement platform is usually used to build the system. The displacement platform can achieve precise control at the nanometer level. At the same time, it is necessary to consider the design of the optical path system and the focusing system, and correct aberrations and chromatic aberrations to achieve a smaller focusing spot.   In addition, in order to meet different processing needs, we must also consider various issues such as fixtures and craftsmanship. For example, because the processing of cardiovascular stents is cylindrical etching, it has different requirements for software and clamps than planar processing, and it is more difficult. For another example, adjust the focal length so that the center intensity of the focal spot just reaches the multiphoton ionization threshold of the material, and the energy absorption and effect during the processing is limited to a small part of the volume at the center of the focal point, instead of being irradiated by the entire focused spot area. In this way, a much smaller processing size than the focused spot can be achieved. (The above is edited by laser cutting machine, see www.gnlaser.com for details)
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