並列摘要
Due to good focusing characteristics, lasers have been used for metal processing for more than 50 years. Since 1967, the Welding Institute in Cambridge, England used a 300W carbon dioxide laser to cut a 1mm thick steel plate for the first time. The processing efficiency of laser light source has always been the goal pursued by the metal processing industry. Although the electro-optical conversion efficiency of CO_2 lasers is low and the wavelength is not the best, it was the best choice before the 1980s. The power of CO_2 lasers developed quite rapidly in the early stage, and was extended to the kilowatt (KW) level in more than 10 years, which effectively shorten the processing time.
並列關鍵字
無資料延伸閱讀
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