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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 发表日期：2009    内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Study on the influence and disposal method of the micro-cracks of optical components (EI CONFERENCE) 会议论文 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China Chen X.-P.; Xuan B.; Wang P.; Li J.-F.; Song S.-M.; Zhang H.; Xie J.-J. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 Micro-crack is one of the most effective factor to the intensity and service life of optical components. Owing to the micro-crack on surface  actual strength of optical components is reduced severely  even less than ten-percent of its theoretical strength. According to fracture mechanics  the mechanisms of the formation and propagation of micro-crack and the growth theory of sub-critical micro-crack are discussed in the paper firstly. Based on practice  an on-line test method disposing etching holes-the molecule-infiltrating method and the principles of acid-etching method disposing micro-crack are described. Followed by the demolishing mechanism of abrasives and a more reasonable removal redundancy of fine-grinding and polishing during  optical production is given by using abrasives in different-size orderly. 2009 SPIE.   IAD-Si coatings on RB-SiC space mirrors for ultra-smooth surfaces (EI CONFERENCE) 会议论文 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China Xu L.; Zhang X.; Li R.; Zhang F.; Wang X. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 To eliminate surface limitation caused by Silicon impurity in RB-SiC space mirrors  a relatively thick Si film is deposited on well finished RB-SiC substrate by a new process-ion assisted depositing (IAD) to provide a better polishable surface. Testing results of IAD-Si properties are provided  showing that the amorphous film has great thermal shock resistance. Then  polishing experiments on 100.5m thick IAD-Si layers are accomplished focusing on smoother surface. Surface figure and micro-roughness of the coating after polished reach 0.026 RMS (=0.6328nm) and less than 0.5nm RMS respectively. Moreover  reflectivity of IAD-Si polished surface with reflective films increases higher than 4.5% than that of RB-SiC in 360-1100nm. High reflectivity and desirable thermal property make IAD-Si an attractive coating material for RB-SiC space mirrors. 2009 SPIE.   Neural network based intelligent control for active stressed lap optical polishing process 会议论文 Proceedings of SPIE, 2009 作者:  Yang Li;  Chen Minyou;  Wana Yongjian;  Wang Mingyu;  Zhao Junhui 收藏  |  浏览/下载：8/0  |  提交时间：2016/11/24