24 November 2014 Low-cost high performance adaptive optics real-time controller in free space optical communication system
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Proceedings Volume 9301, International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition; 930118 (2014) https://doi.org/10.1117/12.2071100
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China
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.
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Shanqiu Chen, Chao Liu, Enyi Zhao, Hao Xian, Bing Xu, Yutang Ye, "Low-cost high performance adaptive optics real-time controller in free space optical communication system", 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; https://doi.org/10.1117/12.2071100
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