Journal articles: 'Laser processing technology'

1

DAIDO, Hiroyuki. "Laser Processing Technology (1)." Journal of the Institute of Electrical Engineers of Japan 136, no. 7 (2016): 422–25. http://dx.doi.org/10.1541/ieejjournal.136.422.

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MIKAME, Kazuhisa, and Hiroyuki NIINO. "Laser Processing Technology (2)." Journal of the Institute of Electrical Engineers of Japan 136, no. 7 (2016): 426–29. http://dx.doi.org/10.1541/ieejjournal.136.426.

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OGAWA, Keiji, Heisaburo NAKAGAWA, and Satoshi WATANABE. "E25 Run-out Correction Technology Using Laser On-the-Machine Tool(Laser processing)." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2009.5 (2009): 603–8. http://dx.doi.org/10.1299/jsmelem.2009.5.603.

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TSUBOI, Akihiko. "Laser Processing Technology of Medical Devices." Review of Laser Engineering 28, no. 7 (2000): 413–15. http://dx.doi.org/10.2184/lsj.28.413.

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UEDA, Takashi. "Leading Edge Technology in Laser Processing." Journal of the Society of Mechanical Engineers 110, no. 1068 (2007): 843. http://dx.doi.org/10.1299/jsmemag.110.1068_843.

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Moon, Young-Hoon, and Jeong-Hwan Jang. "Laser Processing Technology using Metal Powders." Korean Journal of Metals and Materials 50, no. 3 (March 5, 2012): 191–200. http://dx.doi.org/10.3365/kjmm.2012.50.3.191.

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Shao, Kun, Qunlin Zhou, Qingshan Chen, Yi Liu, Chenfang Wang, and Xiang Li. "Research Progress of Water–Laser Compound Machining Technology." Coatings 12, no. 12 (December 4, 2022): 1887. http://dx.doi.org/10.3390/coatings12121887.

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As an emerging industry, laser processing technology has developed rapidly and has gradually become a key technology in transforming traditional manufacturing. It has been widely used in various fields such as industrial production, communication technology, information processing, health care, military, and scientific research. The application and development of laser processing technology is restricted by thermal damage and the processing residues existing in traditional laser processing. However, water laser compound machining can better solve the above-mentioned problems. In water laser compound machining , heat and byproducts can be absorbed and taken away by water to improve processing quality. This paper expounds and analyzes the principles and research of three popular water laser compound machining methods (water-guided laser processing, underwater laser processing and water-jet-assisted laser processing). Furthermore, this paper analyzes the technical difficulties in water laser compound machining and looks forward to the future development trends of this technology.

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Li, Xing Cheng, Yong Kang Zhang, and Ju Fang Chen. "Research Advance in Laser Shock Processing Surface Modification Technology on Metal Alloys." Applied Mechanics and Materials 43 (December 2010): 488–91. http://dx.doi.org/10.4028/www.scientific.net/amm.43.488.

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Laser shock processing is an innovative surface treatment technique to strengthen metals. This process induces a compressive residual stress field which increases fatigue crack initiation life and stress corrosion cracking (SCC) resistance and reduces fatigue crack growth rate. The current status of research and development on laser shock processing of metals, using Q-switched high power lasers is reviewed. Then several key issues are addressed, including the development of the laser peening equipment and the opaque overlay selection and so on. Results to date indicate that laser peening has great potential as a means of improving the mechanical performance of components.

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Wang, Wei, Yong Xian Liu, Fei Xing, and Hua Long Xie. "Laser Remanufacturing Technology and its Applications." Advanced Materials Research 139-141 (October 2010): 1424–27. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1424.

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At present there are a lot of waste of energy in the mechanical processing, which causes increasingly serious pollution of environment. Resource conservation and environmental protection are achieved through the application of green manufacturing technology in mechanical processing. Remanufacturing project, which is a green project according with national sustainable development, is a method to resolve the waste of resources. Laser remanufacturing is a new concept of advanced repair technology that integrates advanced processing technology of laser cladding, laser cladding materials technology and many other technologies. Laser remanufacturing technology is based on laser cladding which is a new surface modification technology. This article describes the technical characteristics and principles of laser cladding. And this paper introduces laser remanufacturing technology by the examples of rotors, gears, shafts and other large wearing parts. the laser remanufacturing technology with the fast development, high efficiency and precision, will not only have a broad market demand, but also have significant economic and social benefits.

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Xiao, Yong Shan, Zhen Yu Zhao, and Yong Quan Zhou. "Research on 3D Laser Texturing Technology of Mold." Applied Mechanics and Materials 510 (February 2014): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amm.510.3.

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In the processing of the mold texture, the traditional chemical etching exits the shortcomings of the pollution and the long processing cycle. This article will introduce 3D laser processing technology to the mold industry, based on the laser etching principle on the metal surface, etch processing can be made in the mold surface. Through theoretical derivation from the 3D laser scanning optical system, the 3D laser scanning hardware system is structured to apply in the mold cavity texturing, the control algorithm has been studied, and finally in the developed laser-etch machine the texturing experimental is performed on the injection molds.

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Buividas, Ričardas, Mindaugas Mikutis, Tadas Kudrius, Artūras Greičius, Gintas Šlekys, and Saulius Juodkazis. "Femtosecond laser processing – a new enabling technology." Lithuanian Journal of Physics 52, no. 4 (2012): 301–11. http://dx.doi.org/10.3952/physics.v52i4.2569.

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NISHIMAE, Junichi, Masashi YOSHIMURA, Yusuke MORI, and Yosuke ORII. "High Quality Laser Processing Technology with Deep Ultraviolet Picosecond Laser." Review of Laser Engineering 45, no. 9 (2017): 554. http://dx.doi.org/10.2184/lsj.45.9_554.

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Ding, Haijuan, Yaping Fan, Hairong Dong, Chengtao Zhao, and Debiao Zhao. "Progress of Laser Processing Technology in Ferroelectric Nanocomposites." Advances in Materials Science and Engineering 2022 (October 11, 2022): 1–12. http://dx.doi.org/10.1155/2022/6502169.

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Although polymer-based nanocomposites have great application potential in many fields, compared with the application of ferroelectric nanocomposites in functional microscale structures and devices, especially in the field of photonics microdevices fabricated by laser processing, the development of polymer-based nanocomposites is relatively lagging behind. In this study, the polyvinylidene fluoride ferroelectric composite material was taken as the research object, and the preparation method of polymer nanocomposite material suitable for laser microstructure processing was solved by exploring the material functionalization method. The control of the optical properties of polyvinylidene fluoride ferroelectric composites was achieved through material design, control of the size of nanoparticles in the prepared polymer nanocomposites, and characterization of their structures and properties. Two-dimensional and three-dimensional structures of polymer nanocomposites were prepared by laser microstructure processing technology, and the optical properties of the microstructures were evaluated. When the applied stress field was zero, the macroscopic coercive field was larger, and the hystereswas loop was wider, while the butterfly curve changed rapidly near the coercive field, and the strain was negative. From the test results of the scanning electron microscope, it can be concluded that the lowest average power to find ablation traces was 0.06 mw, and the affected area was very small, and there was no damage to the surrounding nanotubes. Therefore, this paper believes that the damage threshold of carbon nanotubes was slightly less than 0.06 mw. This study contributes to the development of nanocomposite preparation methods for laser micromachining.

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Wang, Zhi Jian, Xiao Feng Shang, and Xiao Yan Wang. "Research of the Virtual Prototyping Technology Based on Laser Processing." Applied Mechanics and Materials 16-19 (October 2009): 871–75. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.871.

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At present, laser processing has been widely used, but the traditional laser processing can not rapidly adapt to current market demands, so the virtual prototyping technology based on laser processing is put forward. In this paper, the research status of the virtual prototyping technology based on laser processing is summarized and the structure figure of laser processing virtual prototyping system is established. Then the virtual prototyping technology based on metal part direct rapid prototyping is studied, which includes the structure parameterization designs of coaxial powder feeding device and powder nozzle and the simulation of the gas-solid two-phase flow in the coaxial powder feeding device and the temperature distribution during the deposition process of metal powder.

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15

Sugioka, Koji. "Progress in ultrafast laser processing and future prospects." Nanophotonics 6, no. 2 (March 1, 2017): 393–413. http://dx.doi.org/10.1515/nanoph-2016-0004.

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AbstractThe unique characteristics of ultrafast lasers have rapidly revolutionized materials processing after their first demonstration in 1987. The ultrashort pulse width of the laser suppresses heat diffusion to the surroundings of the processed region, which minimizes the formation of a heat-affected zone and thereby enables ultrahigh precision micro- and nanofabrication of various materials. In addition, the extremely high peak intensity can induce nonlinear multiphoton absorption, which extends the diversity of materials that can be processed to transparent materials such as glass. Nonlinear multiphoton absorption enables three-dimensional (3D) micro- and nanofabrication by irradiation with tightly focused femtosecond laser pulses inside transparent materials. Thus, ultrafast lasers are currently widely used for both fundamental research and practical applications. This review presents progress in ultrafast laser processing, including micromachining, surface micro- and nanostructuring, nanoablation, and 3D and volume processing. Advanced technologies that promise to enhance the performance of ultrafast laser processing, such as hybrid additive and subtractive processing, and shaped beam processing are discussed. Commercial and industrial applications of ultrafast laser processing are also introduced. Finally, future prospects of the technology are given with a summary.

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Badenko, Vladimir, Dmitry Zotov, and Alexander Fedotov. "Hybrid processing of laser scanning data." E3S Web of Conferences 33 (2018): 01047. http://dx.doi.org/10.1051/e3sconf/20183301047.

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In this article the analysis of gaps in processing of raw laser scanning data and results of bridging the gaps discovered on the base of usage of laser scanning data for historic building information modeling is presented. The results of the development of a unified hybrid technology for the processing, storage, access and visualization of combined laser scanning and photography data about historical buildings are analyzed. The first result of the technology application for the historical building of St. Petersburg Polytechnic University shows reliability of the proposed approaches.

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Angelova, Yordanka, Silvija Mežinska, and Lyubomir Lazov. "INNOVATIVE LASER TECHNOLOGY IN TEXTILE INDUSTRY: MARKING AND ENGRAVING." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 3 (June 15, 2017): 15. http://dx.doi.org/10.17770/etr2017vol3.2610.

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The advent of laser technology in textiles industry has established a new innovative solution, which successfully prevents some of the weaknesses in the conventional technologies. Lasers are being used in Laser Marking (Only the surface of fabric is processed, fading), Laser Engraving (Controlled cutting to depth). It has been used extensively as the replacement of some conventional dry processes like sand blasting, hand sanding, destroying, and grinding etc., which are potentially harmful and disadvantageous for the environment. The article considers some innovative laser technologies, such as marking and engraving on various textile materials. The laser applications for leather and textile processing were analysed. The report overviews systems and ways of laser marking and engraving implementations. Classification of markings was proposed. The advantages of laser marking and engraving technologies in textile fields were pointed.

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Pan, Yi Heng, Zhi Gang Li, Zhan Shi Liu, and Bo Li. "The Application of 3D Laser Scanning Technology in Ginkgo Landslide Monitoring." Advanced Materials Research 898 (February 2014): 759–62. http://dx.doi.org/10.4028/www.scientific.net/amr.898.759.

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Three-dimensional laser scanning technology, short for 3D laser scanning technology, is another innovation in surveying and mapping technology after GPS space positioning technology. This paper introduces the 3D laser scanning technology applied in the Ginkgo landslide monitoring. In this paper, the monitoring schematic design, data acquisition, data processing and data analysis are systematically introduced. It follows that Ginkgo landslide overall deformation characteristics, 3D laser scanning technologys strengths and weaknesses in the landslide monitoring. It is promising for the application of 3D laser scanning technology in landslide monitoring.

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Zhang, Shao Qing, Dong Min Zhang, and Quan Hua Feng. "Research on the Key Technology of Laser Engraved Image." Advanced Materials Research 989-994 (July 2014): 3919–21. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.3919.

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In 1960 the first ruby laser came out , after 40 years’ development, laser engraving technology has been widely used in various areas. This paper describes the characteristics of laser engraving, the advantages and applications in industries and study images of laser engraving key technologies in-depth from image processing, laser engraving process parameters and clean carbide processing , and JK-2030 CO2 laser engraving machines on paulownia color photos as examples for authentication, making laser engraving images more easily and efficiently .

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Pan Yong, 潘涌, 姜兆华 Jiang Zhaohua, 骆公序 Luo Gongxu, 王国庆 Wang Guoqing, and 安博言 An boyan. "Laser Micro-Processing Technology on Crystalline Solar Cell." Applied laser 31, no. 6 (2011): 469–72. http://dx.doi.org/10.3788/al20113106.0469.

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HASHIOKA, Tsukasa, and Yusuke OISHI. "Application of Laser Processing Technology to TNGA Engine." Review of Laser Engineering 48, no. 2 (2020): 68. http://dx.doi.org/10.2184/lsj.48.2_68.

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Anyakin, N. I., M. Nayebi, V. S. Kovalenko, V. V. Kremenitskii, R. O. Zhuk, A. N. Stepura, and P. V. Kondrashev. "Technology of dimensional laser processing of intractable materials." Surface Engineering and Applied Electrochemistry 50, no. 1 (January 2014): 1–8. http://dx.doi.org/10.3103/s1068375514010025.

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23

SATO, Takuzo. "Present status and prospects of laser processing technology." Journal of the Surface Finishing Society of Japan 40, no. 8 (1989): 864–68. http://dx.doi.org/10.4139/sfj.40.864.

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Teng, Xiuxiu, Min Zhang, and Arun S. Mujumdar. "Potential application of laser technology in food processing." Trends in Food Science & Technology 118 (December 2021): 711–22. http://dx.doi.org/10.1016/j.tifs.2021.10.031.

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Zh.V, Smirnova. "Laser alloying technology when changing the processing speed." International Journal of Emerging Trends in Engineering Research 8, no. 4 (April 25, 2020): 1196–98. http://dx.doi.org/10.30534/ijeter/2020/40842020.

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Dupriez, Nataliya Deyneka, and Alexander Denkl. "Advances of OCT Technology for Laser Beam Processing." Laser Technik Journal 14, no. 4 (September 2017): 34–38. http://dx.doi.org/10.1002/latj.201700021.

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Dobrzański, Leszek Adam, and A. Drygała. "Influence of Laser Processing on Polycrystalline Silicon Surface." Materials Science Forum 706-709 (January 2012): 829–34. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.829.

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This paper presents technology of multicrystalline silicon solar cells with laser texturisation step. The texturing of polycrystalline silicon surface using Nd:YAG laser makes it possible to increase absorption of the incident solar radiation. Moreover, the additional technological operation consisting in etching in 20 % KOH solution at temperature of 80°C was introduced into technology of the photovoltaic cells manufactured from laser textured wafers allows to remove laser induced defects but cause the texture to flatten out reducing it optical effectiveness. This paper demonstrates, that laser processing is very promising technique for texturing multicrystaline silicon independent on grains crystallographic orientation compared to conventional texturing methods in technology of solar cells.

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Wang, Bang Fu, Xue Li Zhu, Ou Xie, and Zhen Yin. "Based on Microscale Laser Shock Processing of Metal Material Characteristics Analysis and Prospect." Advanced Materials Research 450-451 (January 2012): 273–76. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.273.

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It is introduced that laser shock peening is suitable for machining metal micro components. The micro scale effect and elastic-plastic theory of micro scale laser shock processing were analyzed and discussed. The research status, mechanism, key technology and influence factors of microscale lager shock peening were summarized and the problems in microscale lager shock peening were analyzed, which provides guidance for further research.

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Gu, Yuan Yuan, Guo Xing Wu, Hui Lu, and Yan Cui. "GaAs-Based High Power Diode Laser." Advanced Materials Research 538-541 (June 2012): 1852–56. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1852.

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High-power diode lasers based on GaAs semiconductor bars are well established as reliable and highly efficient laser sources. The device structure and stack technology of edge-emitting diode laser were presented briefly as well as the development of electro-optical conversion efficiency ,lifetime , power .The technology of ten-thousand –watt level high power diode laser was introduced as a new generation of laser processing equipment. In order to output high power, we utilized polarization coupling technology to couple two 808nm and 880nm laser diode stack together, and designed the optical system to expand and focus the beam, through the experiment; we realize the overall efficiency more than 90%, power output 1000W.

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Yuan, Gen Fu, Wei Zheng, and Xue Hui Chen. "Contrast Test of KOH Solutions Jet-Assisted Laser Etching on Al₂O₃ Ceramics." Advanced Materials Research 472-475 (February 2012): 2476–79. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2476.

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An experimental device of KOH solutions jet-assisted laser etching is designed, Laser-chemical combined etching technology is combined with the Medium-jet erosion processing ,and the influence on the etching capacity and cross section quality of material sample of laser processing parameters,jet processing parameters are studied. The results show that the laser processing parameters and jet processing have a decisive impact on the quality of the workpiece, the composite processing technology can remove most of melting slag which are produced by the laser processing, the surface roughness are effectively reduced. The blind holes of the machined materials have the regular shape.

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31

KIMURA, Seiichiro, and Yoshinobu MAKINO. "Precision Processing by Laser. Precise Welding Technology with a High Power Laser." Journal of the Japan Society for Precision Engineering 65, no. 11 (1999): 1547–51. http://dx.doi.org/10.2493/jjspe.65.1547.

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Lin, Guo Min, Li Xia Peng, and Yu Feng Zhao. "Analysis of Latest Application Movement of Laser Surface Heat Treatment Technologies." Advanced Materials Research 291-294 (July 2011): 2199–204. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2199.

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The application of two representative laser surface treatments technologies which are laser shock processing technology and laser coating treatment technology are described. The application of laser shock processing in the fields of aero engine disc, wing panel formation, structural welding and strengthening, nuclear power station pressure container strengthening etc and also evaluates the effects are analyzed. The applications of laser coating treatment in the field of aeronautic manufacturing are analyzed in detail. The development direction of laser shock processing and laser coating treatment are indicated finally.

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Zhang, Bao, Bei Nan Hu, Lei Zhang, and Tian Yi Zhang. "The 3D Laser Engraving Pavilion Design Based on Ergonomics." Applied Mechanics and Materials 224 (November 2012): 312–15. http://dx.doi.org/10.4028/www.scientific.net/amm.224.312.

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The so-called laser engraving technology, by using laser processing system and computer numerical control technology to complete the automated processing in the pavilion, and the pavilion is where this series of processing technology completed. The paper briefly describes the working principle and system assembly of three-dimensional laser engraving Pavilion, and then focus on the research and analysis of its shape size and assembly combined with the ergonomics, and conclude to a user-friendly portable 3D laser engraving pavilion wich suit the China market very well.

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Lin, Jin Lan, and Jian Hong Fan. "Research on the Theory of the Laser Shock Processing Technology." Applied Mechanics and Materials 610 (August 2014): 1021–28. http://dx.doi.org/10.4028/www.scientific.net/amm.610.1021.

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In this paper the laser shock processing technology (LSPT) is investigated theoretically. A one-dimensional theoretical model is presented to express analytically the transmission coefficient of the incident laser beam through four different layers, i.e., the air layer, the constrained layer, the plasma layer, and the absorbing coating. Based on this model, the key parameters of LSPT can be further optimized to obtain the maximum transmission coefficient and the best surface-hardening effect. This one-dimensional theoretical model presented can be further used in guiding the parameter optimization for this technology.

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Zhou Jian, 周健, and 龙兴武 Long Xingwu. "Signal processing technology of spectrum-analyzing laser Doppler velocimeter." High Power Laser and Particle Beams 22, no. 8 (2010): 1865–69. http://dx.doi.org/10.3788/hplpb20102208.1865.

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NAGAI, Haruhiko. "Recent Laser Technology and Its Applications to Material Processing." Review of Laser Engineering 28, no. 1 (2000): 2. http://dx.doi.org/10.2184/lsj.28.2.

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SAITOH, Shigeki. "Application of Disk Laser Processing Technology for “E-car”." Review of Laser Engineering 39, no. 9 (2011): 685–89. http://dx.doi.org/10.2184/lsj.39.685.

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Uhlenbusch, J., U. Bielesch, S. Klein, M. Napp, and J. H. Schäfer. "Recent developments in metal processing with pulsed laser technology." Applied Surface Science 106 (October 1996): 228–34. http://dx.doi.org/10.1016/s0169-4332(96)00385-6.

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IKEDA, Masayuki. "Laser Processing Technology(Applications of Optics in Mechanical Engineering)." Journal of the Society of Mechanical Engineers 91, no. 832 (1988): 246–50. http://dx.doi.org/10.1299/jsmemag.91.832_246.

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Wang, Hong-jie, Hua Cheng, Kang-wen Xie, Fu-yun Lu, and Yong-chao Du. "Applications of laser precisely processing technology in solar cells." Optoelectronics Letters 3, no. 5 (September 2007): 385–87. http://dx.doi.org/10.1007/s11801-007-7047-6.

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Bernatskyi, Artemii, and Vladyslav Khaskin. "The history of the creation of lasers and analysis of the impact of their application in the material processing on the development of certain industries." History of science and technology 11, no. 1 (June 26, 2021): 125–49. http://dx.doi.org/10.32703/2415-7422-2021-11-1-125-149.

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The paper is devoted to the analysis of the history of the creation of the laser as one of the greatest technical inventions of the 20th century. This paper focuses on establishing a relation between the periodization of the stages of creation and implementation of certain types of lasers, with their influence on the invention of certain types of equipment and industrial technologies for processing the materials, the development of certain branches of the economy, and scientific-technological progress as a whole. In preparing the paper, the generally accepted methods, which are widely used in the preparation of historical research works, have been applied: the historical method – for the study and interpretation of the texts of primary sources and the search for other evidence used for research, as well as for the presentation of historical events associated with the development of laser technology; the historical-genetic method – for studying the genesis of specific historical phenomena and analyzing the causality of changes in the development of laser technology; the historical-critical method – for displaying cause-and-effect relationships, reconstructing events that influenced the development of laser technology; the method of historical periodization. The variety of different possible options for the use of lasers did not allow placing all the collected materials within the framework of one paper, and therefore, the authors have decided to dwell on the facts, which, in the opinion of the paper’s authors, are the most interesting, significant, poorly studied, and little known. The paper discusses the stages of: invention of the first laser; creation of the first commercial lasers; development of the first applications of lasers in industrial technologies for processing the materials. Special attention is paid to the “patent wars” that accompanied different stages of the creation of lasers. A comparative analysis of the market development for laser technology from the stage of creation to the present has been carried out. It has been shown that the modern market for laser technology continues to develop actively, as evidenced by the continued stable growth of laser sales over the past 10 years. This indicates that the demand for laser technology is inextricably linked with the development of high technology production and scientific-technological progress. The analysis has shown that recently, the trends in the use of laser technology have changed; in particular, their industrial and medical applications are decreasing, while there is an increase in their use in the fields of sensor production and communication.

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Ocaña, José Luis, and Janez Grum. "Laser Shock Processing and Related Phenomena." Metals 10, no. 6 (June 16, 2020): 797. http://dx.doi.org/10.3390/met10060797.

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Laser Shock Processing (LSP) is continuously developing as an effective technology for improving the surface and mechanical properties of metallic alloys and is emerging in direct competition with other established technologies, such as shot peening, both in preventive manufacturing treatments and maintenance/repair operations [...]

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Isakov, V. V. "Process Optimization of Laser Processing in Terms of System-synergistic analysis." Izvestiya MGTU MAMI 5, no. 2 (January 20, 2011): 134–39. http://dx.doi.org/10.17816/2074-0530-69922.

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The article considers the approaches to the problem of optimization of laser processing for decision of actual tasks of technology of mechanical engineering. The authors developed the technique of optimization of the laser processing technology, based on synergetic method of an estimation of basic parameters. Optimization results on basis of recurrence relationship allow formulating of requirements for technological efficiency of the laser processing.

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Zhou, L., Y. H. Li, W. F. He, X. D. Wang, and Q. P. Li. "Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties." Materials Science Forum 697-698 (September 2011): 235–38. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.235.

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A plasma sound wave detection method of laser shock processing (LSP) technology is proposed. Speciments of Ni-base superalloy are used in this paper. A convergent lens is used to deliver 1.2 J, 10 ns laser pulses by a Q-switch Nd:YAG laser, operating at 1 Hz. The influence of the laser density to the shock wave is investigated in detail for two different wavelength lasers. Constant amplitude fatigue data are generated in room environment using notch specimens tested at an amplitude of vibration 2.8 mm and first-order flextensional mode. The results show that LSP is an effective surface treatment technique for improving the high cycle fatigue performance of Ni-base superalloys having a factor of 1.62 improvement in fatigue life.

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Xie, Xiaofan, Yunfei Li, Gong Wang, Zhenxu Bai, Yu Yu, Yulei Wang, Yu Ding, and Zhiwei Lu. "Femtosecond Laser Processing Technology for Anti-Reflection Surfaces of Hard Materials." Micromachines 13, no. 7 (July 8, 2022): 1084. http://dx.doi.org/10.3390/mi13071084.

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The anti-reflection properties of hard material surfaces are of great significance in the fields of infrared imaging, optoelectronic devices, and aerospace. Femtosecond laser processing has drawn a lot of attentions in the field of optics as an innovative, efficient, and green micro-nano processing method. The anti-reflection surface prepared on hard materials by femtosecond laser processing technology has good anti-reflection properties under a broad spectrum with all angles, effectively suppresses reflection, and improves light transmittance/absorption. In this review, the recent advances on femtosecond laser processing of anti-reflection surfaces on hard materials are summarized. The principle of anti-reflection structure and the selection of anti-reflection materials in different applications are elaborated upon. Finally, the limitations and challenges of the current anti-reflection surface are discussed, and the future development trend of the anti-reflection surface are prospected.

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Liu, Zhan Wei, Da Qing Zou, Wu Zhu Chen, Wei Ning Wang, and Yan Fang. "Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry." Key Engineering Materials 326-328 (December 2006): 63–66. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.63.

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In this paper, the residual deformation induced in laser welding processing was studied by using the moiré interferometry and a novel high-temperature specimen grating technology. The experimental results indicate that the heat-affected zone of laser welding is a narrow strip. There exists great residual strain gradient in the heat-affected zone, especially great residual shear strain gradient. It implies that great residual stress and stress gradient exist near the welded seam. The relationship between the size of the heat-affected zone and the changes of the technology parameters were discussed in the experiments, which can supply some reliable experimental data for optimizing processing technology.

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Lin, Chern-Sheng, Yu-Chia Huang, Shih-Hua Chen, Yu-Liang Hsu, and Yu-Chen Lin. "The Application of Deep Learning and Image Processing Technology in Laser Positioning." Applied Sciences 8, no. 9 (September 3, 2018): 1542. http://dx.doi.org/10.3390/app8091542.

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In this study, machine vision technology was used to precisely position the highest energy of the laser spot to facilitate the subsequent joining of product workpieces in a laser welding machine. The displacement stage could place workpieces into the superposition area and allow the parts to be joined. With deep learning and a convolutional neural network training program, the system could enhance the accuracy of the positioning and enhance the efficiency of the machine work. A bi-analytic deep learning localization method was proposed in this study. A camera was used for real-time monitoring. The first step was to use a convolutional neural network to perform a large-scale preliminary search and locate the laser light spot region. The second step was to increase the optical magnification of the camera, re-image the spot area, and then use template matching to perform high-precision repositioning. According to the aspect ratio of the search result area, the integrity parameters of the target spot were determined. The centroid calculation was performed in the complete laser spot. If the target was an incomplete laser spot, the operation of invariant moments would be performed. Based on the result, the precise position of the highest energy of the laser spot could be obtained from the incomplete laser spot image. The amount of displacement could be calculated by overlapping the highest energy of the laser spot and the center of the image.

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Graf, Gregor, Niki Nouri, Stefan Dietrich, Frederik Zanger, and Volker Schulze. "Dual-Laser PBF-LB Processing of a High-Performance Maraging Tool Steel FeNiCoMoVTiAl." Materials 14, no. 15 (July 29, 2021): 4251. http://dx.doi.org/10.3390/ma14154251.

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As part of an international research project (HiPTSLAM), the development and holistic processing of high-performance tool steels for AM is a promising topic regarding the acceptance of the laser powder bed fusion (PBF-LB) technology for functionally optimized die, forming and cutting tools. In a previous work, the newly developed maraging tool steel FeNiCoMoVTiAl was qualified to be processed by laser powder bed fusion (PBF-LB) with a material density of more than 99.9% using a suitable parameter set. To exploit further optimization potential, the influence of dual-laser processing strategies on the material structure and the resulting mechanical properties was investigated. After an initial calibration procedure, the build data were modified so that both lasers could be aligned to the same scanning track with a defined offset. A variation of the laser-based post-heating parameters enabled specific in-situ modifications of the thermal gradients compared to standard single-laser scanning strategies, leading to corresponding property changes in the produced material structure. An increase in microhardness of up to 15% was thus obtained from 411 HV up to 471 HV. The results of the investigation can be used to derive cross-material optimization potential to produce functionally graded high-performance components on PBF-LB systems with synchronized multi-laser technology.

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Xu, Dong, Yao Yao, Xing Fu, and Chao Wang. "Design of Micromachining System Based on Nanosecond Pulsed Laser." Key Engineering Materials 645-646 (May 2015): 1049–53. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.1049.

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In recent years, pulsed laser processing technology is widely used in MEMS device manufacturing, aerospace technology, precision instrument manufacturing and circuit board processing. According to the characteristics of nanosecond laser, this paper designs a novel nanosecond pulsed laser micromachining system with PMAC card as its core unit. The system can achieve automation control of laser parameters and movement pattern of motion system by software, which can easily realize automatic processing of point, line, and plane structure in micron scale. In this paper, several groups of experiments are taken to test the reliability and accuracy of the machining system and find the group to obtain the best processing result.

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KAKIZAKI, Koji, Masakazu KOBAYASHI, Hiroaki OIZUMI, Toshio MIMURA, Junichi FUJIMOTO, Taisuke MIURA, and Hakaru MIZOGUCHI. "Development of Laser Processing Technology with Hybrid ArF Laser in Extremely Short Wavelength." Review of Laser Engineering 45, no. 9 (2017): 571. http://dx.doi.org/10.2184/lsj.45.9_571.

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Journal articles on the topic 'Laser processing technology'

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