Development of three-dimensional profiler for large field micro-surface topography measurement |
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Authors: | Hong-xia Zhang Yi-mo Zhang Wen-cai Jing Da-gong Jia and Cen Huang |
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Affiliation: | (1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, 300072, China;(2) Key Laboratory of Optoelectronics Information and Technical Science, Ministry of Education, Tianjin, 300072, China |
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Abstract: | This paper presents a large field phase-shifting interference microscope for micro-surface topography measurement. A PZT is
used as the Z-directional phase shifter. The interference microscope is the combination of the infinity tube microscope with the Mirau
two-beam interferometer. Two-dimensional precision motorized stage is aligned as the scanning system in the X- and Y-direction to extend the test surface measurement range to 12.5 mm × 12.5 mm. The minimum displacement is 0.039 m and the
overlapped proportion is 0.22. A fast stitching algorithm is proposed based on grid matching. According to the reflectivity
of the core and the ferrule, the plate with the transmission/reflectivity ratio of 70/30 is selected to balance the interference
intensity. The instrument is proved to be valid by actual measurement of the end surface of an optical fiber connector.
This work has been supported by the National Natural Science Foundation of China (No.60577013) and New Teachers Doctoral Fund
of Ministry of Education of China (200800561022) |
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Keywords: | |
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