Design of real-time measurement for optical fiber positioning based on FPGA

Huajie Han; Yonggang Gu; Guocheng Liu; Chao Zhai

doi:10.1117/12.2232418

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22 July 2016 Design of real-time measurement for optical fiber positioning based on FPGA

Huajie Han; Yonggang Gu; Guocheng Liu; Chao Zhai

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Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99121S (2016) https://doi.org/10.1117/12.2232418
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

In order to track the stellar objects in fiber spectroscopic telescopes, measuring the fiber positions is necessary, which is currently unsolved due to the large number of data. In this paper, we propose a novel measure method based on the Field Programmable Gate Arrays (FPGA). Firstly, the fiber spots are obtained from the complicated original images by preprocessing including the median filtering technique to remove the image noise and the correlation operation technique to enhance the fiber spot characteristic. Then, a novel fast connected component labeling technique is employed to acquire the accurate fiber positions. The design of the image processing system is realized by a five-stage pipeline technique based on the FPGA, thus the image processing speed is greatly improved and meanwhile the real-time calculation of the fiber positions is fulfilled.

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Huajie Han, Yonggang Gu, Guocheng Liu, and Chao Zhai "Design of real-time measurement for optical fiber positioning based on FPGA", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99121S (22 July 2016); https://doi.org/10.1117/12.2232418

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KEYWORDS

Digital filtering

Field programmable gate arrays

Image processing

Image filtering

Optical filters

Clocks

Image quality

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