were theoretically evaluated based on kinetic equations describing the dissolution of hardening 尾" (Mg_2Si) precipitates and the precipitation of non-hardening 尾' (Mg_2Si) precipitates during the weld thermal cycles to quantitatively prove above mentioned advantageous characteristics of laser beam ...
This paper focused on the characteristics of laser beam transmitted in the turbulent atmosphere. 本文主要讨论了激光在湍流大气中的传输特性。 paper.pet2008.cn 2. A modified parallel section method was introduced according to the characteristics of laser hardening. 根据激光强化的工艺特性,从优化的角度出发...
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With a Marx generator providing electric fields of up to 180 kV/cm between the cathode and annular anode, a Faraday cup array positioned 10 cm downstream of the anode measures the spatial distribution of the electron beam in this field-free region. although self-induced vacuum breakdown will ...
Laser beam welding can reduce the size of grain of high strength steel joints due to its rapid cooling resulting from its higher energy density and lower heat input. But there are some important problems in joint, such as solidification cracks, HAZ cracks and soften etc. In this paper, char...
(IGBT)moduleandthewirefeedingspeedwascorrespondingtothearccurrent.Theschematicofthisset-upisshowninFig.1.ThemodeofthelaserwasTEM01.Thelaserbeamwaspassedthroughfourreflectorsbeforea286mmfocallengthfocusingmirrorprovidingafocusedspotsizeof0.6mmdiameter,andpassednear8.5mbeforebeingfocused.Theshieldinggasusedwas...
grazingincidencelaserscatteringcharacteristicsofanisotropicroughseasurface 各向异性粗糙海面对掠入射激光的散射特性研究王新涛1,屈惠明1,曲红星2,龚靖棠1,王琳2(1.南京理工大学电子工程与光电技术学院,江苏南京210094;2.中国人民解放军总参谋部陆航研究所,北京101121)摘要院针对目前粗糙海面的激光散射场模型并不适用于激光...
Detailed Eye-Safety Analysis of Laser-Based Scanned-Beam Projection Systems Practical, Theoretical or Mathematical, Experimental/ biological effects of laser radiationdisplay instrumentationeyehealth and safety Buckley,Edward - 《Journal of Display Technology》 被引量: 33发表: 2012年 Laser instrumentation fo...
Laser beam characterizationThermal deformationLaser beam shapingOwing to their good diffusion cooling and low sensitivity to misalignment, slab-shape negative-branch unstable-waveguide resonators are widely used for high-power lasers in industry. As the output beam of the resonator is astigmatic, an ...
An examination was made of the lasing characteristics of heat-treated glass active elements. It was found that heat treatment increases the average power emitted from glass lasers while maintaining a high emission brightness, and provides a radiation beam which is uniform over its cross section in ...