After laser treatment, the surface hardness of cast iron can reach 60HRC, and carbon steel with medium carbon and high carbon can reach up to 70HRC. Although the cutting speed is fast and the cutting thickness is large, the cutting size precision is obviously not good. (2) When the welding parts need clamps, must ensure that the final position of the weld is aligned with the welding spot where will be impacted by the laser beam. 9 CLINICAL APPLICATION OF GaAlAs 830 NM DIODE LASER (LLLT) IN TREATMENT OF RHEUMATOID ARTHRITIS. (6) Energy conversion efficiency is too low, usually less than 10%. LASERS in Welding and Cutting of metal 16. between: A focused laser can act as an extremely sharp scalpel for delicate surgery, cauterizing as it cuts. It has played an active role in the development of natural science and technology and the progress of the social economy. Laser engraving works with a laser beam with extremely high energy density under the control of the computer, irradiate the surface of the product which required marking to make the surface of the product melt or vaporize instantly, thus marking the product surface with the required text or logo, as shown in figure 4. Lasers are used for photocoagulation of the retina to halt retinal hemorrhaging and for the tacking of retinal tears. Although the machining cutting has high accuracy, the cutting speed is too slow and can’t cut the complicated curve. Laser technology is expanding in new application fields, and the development speed is amazing. Engraving or marking can be added to an object to increase its aesthetic value, complete a product or to have a more practical function, such as adding a barcode. Helium-neon and semiconductor lasers have become standard parts of the field surveyor's equipment. Laser In Surveying And Ranging 17. A pulsed ruby laser was used for this measurement. If it was off for ½ second and on for ½ second that would be referred to as a 50% duty cycle. Laser Applications Helena Jelínková, Zden k Kluiber Introduction Laser radiation in various applications was made use of immediately after the first laser became operational. (3) No electrodes are needed, no contamination or damage concerns. CO2 laser engraving Designs Laser Textile Stitching 21. Under the action of pump light, high power density can easily be formed in the optical fiber, which causes the laser energy level of the laser working substance to “reverse the number of particles”. Just to name a few, the lasers are used in medical procedures, surgery, cutting, drilling, welding, soldering, alignment, product marking and coding, etc. It uses the laser as the preheating source and uses the oxygen and other active gases as the cutting gas. Application - Laser Cutting. The prototype can be made directly from CAD 3D solid model in a few hours or dozens of hours. The machine requires isolation from the earthquake focus and ensure that the laser is in dry and constant temperature. (5) Workpieces can be placed in enclosed Spaces (controlled by a vacuum or internal gas environment). Today, laser technology is used in all walks of life. And the machine must be equipped with a reflector. Our mission is to foster lasers, laser applications, and laser safety worldwide. Laser welding (figure 3) is an important field of laser technology. The ruby laser was designed and constructed by Teodor Maiman in 1960, and as early as 1961 its radiation was used to treat eye and skin diseases. The CO2 laser generator is discharging through a mixture of CO2, He and N2 in the cavity of the laser by high pressure. Moreover, the precision casting level of foundry shop has been improved, so as to lay a good foundation for the successful completion of precision casting production tasks in the follow-up products. Cutting copper alloy effect is worse, especially cutting copper.