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沈熊 《气动实验与测量控制》1995,9(3):60-67
随着激光技术的发展和应用的复杂化,人们把注意力深入集中的激光中剖面特性的质量,过去那些用烧蚀斑和目视分析散射光斑等方法已经远远不能适应现代激光工艺和应用对激光束质量评定的要求,本文介绍应用电子图像方法诊断激光束的新技术。并将其应用于激光测速的光束诊断和监控。为改善激光流动测量的性能提供了有效的手段。 相似文献
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航空金属滤网的特种加工技术(英文) 总被引:3,自引:0,他引:3
Thanks to recent advances in manufacturing technology, aerospace system designers have many more options to fabricate high-quality, low-weight, high-capacity, cost-effective filters. Aside from traditional methods such as stamping, drilling and milling, many new approaches have been widely used in filter-manufacturing practices on account of their increased processing abilities. How- ever, the restrictions on costs, the need for studying under stricter conditions such as in aggressive fluids, the complicity in design, the workability of materials, and others have made it difficult to choose a satisfactory method from the newly developed processes, such as, photochemical machining (PCM), photo electroforming (PEF) and laser beam machining (LBM) to produce small, inexpensive, lightweight aerospace filters. This article appraises the technical and economical viability of PCM, PEF, and LBM to help engineers choose the fittest approach to turn out aerospace filters. 相似文献