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Proceedings Paper

Research on the software of the micro-displacement sensor in the active optical system based on FPGA
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Paper Abstract

Active optics is a wave surface correction technology, which is used to eliminate deformation caused by gravity and temperature. The measurement of the micro displacement between sub-mirrors of large astronomical telescope is the key to automatic adjustment of the active optical system. In this paper, for a differential capacitive micro displacement sensor, the functions of each main module are realized through the designing of the software of FPGA and network microcontroller, which includes the modules of the capacitive-driving signal generation based on FPGA, the controlling module of demodulator ADA2200, A/D conversion module of analog signal, data transmission module via Ethernet based on MCU W7100A. The actual debugging shows that these modules achieved the expected function and lay a good foundation for the operation of the micro displacement sensor system.

Paper Details

Date Published: 18 January 2019
PDF: 8 pages
Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 108391B (18 January 2019); doi: 10.1117/12.2506479
Show Author Affiliations
Xiaokang Xu, Nanjing Univ. of Science and Technology (China)
Wusen Li, Nanjing Univ. of Science and Technology (China)
Wenjian Chen, Nanjing Univ. of Science and Technology (China)
Yongjun Qi, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 10839:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Fan Wu; Yudong Zhang; Xiaoliang Ma; Xiong Li; Bin Fan, Editor(s)

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