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Proceedings Paper

Low-cost high performance adaptive optics real-time controller in free space optical communication system
Author(s): Shanqiu Chen; Chao Liu; Enyi Zhao; Hao Xian; Bing Xu; Yutang Ye
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Paper Abstract

This paper proposed a low-cost and high performance adaptive optics real-time controller in free space optical communication system. Real-time controller is constructed with a 4-core CPU with Linux operation system patched with Real-Time Application Interface (RTAI) and a frame-grabber, and the whole cost is below $6000. Multi-core parallel processing scheme and SSE instruction optimization for reconstruction process result in about 5 speedup, and overall processing time for this 137-element adaptive optic system can reach below 100 us and with latency about 50 us by utilizing streamlined processing scheme, which meet the requirement of processing at frequency over 1709 Hz. Real-time data storage system designed by circle buffer make this system to store consecutive image frames and provide an approach to analysis the image data and intermediate data such as slope information.

Paper Details

Date Published: 24 November 2014
PDF: 7 pages
Proc. SPIE 9301, International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition, 930118 (24 November 2014); doi: 10.1117/12.2071100
Show Author Affiliations
Shanqiu Chen, Institute of Optics and Electronics (China)
Univ. of Electronic Science and Technology of China (China)
Chao Liu, Institute of Optics and Electronics (China)
Enyi Zhao, Institute of Optics and Electronics (China)
Hao Xian, Institute of Optics and Electronics (China)
Bing Xu, Institute of Optics and Electronics (China)
Yutang Ye, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 9301:
International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition
Gaurav Sharma; Fugen Zhou; Jennifer Liu, Editor(s)

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