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Comparied to traditional optical processing methods, numerical controlled surfacing techniques have irreplaceable effects especially in spherical and aspherical optics. In this paper, fabricating methods, mechanisms and processes are analyzed. Also, some processing difficulties and problems are discussed. The possible improvements and feasible methods are given. 相似文献
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组合编码器的结构和原理 总被引:5,自引:0,他引:5
组合光电编码器又叫多圈编码器,现在其已被广泛的应用于大型精密仪器的角度位置测量以及数控数显系统中.本文将详细的介绍这种编码器的结构特点及工作原理. 相似文献
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