Differential Confocal Axial Range Expansion Method Based on Double Fuzzy

被引:0
作者
Yuan, Tao [1 ]
Yi, Dingrong [1 ]
Jiang, Wei [2 ]
Ye, Yiqing [2 ]
Wu, Dongliang [1 ]
Liu, Ting [1 ]
机构
[1] Huaqiao Univ, Sch Mechatron & Automat, Xiamen 361021, Peoples R China
[2] Quanzhou Normal Univ, Sch Phys & Informat Engn, Quanzhou 362046, Peoples R China
基金
中国国家自然科学基金;
关键词
Semiconductor device measurement; Position measurement; Microscopy; Three-dimensional displays; Sensors; Dispersion; Imaging; Axial range expansion; differential confocal; double fuzzy; layer scanning; reference plane;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Aiming at the problem of limited axial range of differential confocal microscopy (DCM) 3-D measurement method, this study proposes a method to expand the range of DCM (differential confocal axial range expansion method based on double fuzzy, DFDCM). The DFDCM enables range expansion by combining layer scanning with DCM. The problem of effective data fusion in each DCM is solved by using double fuzzy ranging. Then, since only three images are required in each DCM, i.e., pre-focus image, reference plane image, and post-focus image, DFDCM can be well adapted to most DCMs. Quantitative evaluation experiments using the parallel object DCM system show that DFDCM can effectively extend the measurement range of DCM. Under a 10x /0.25 objective, the axial distance between two adjacent reference surfaces is 14 mu m . In the experiment of step measurement of 28.91 mu m , the measurement error is 0.392 mu m and the error rate is 1.34%.
引用
收藏
页码:3568 / 3573
页数:6
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