18 August 2011 Pipeline structure for real-time centroid calculation of Hartmann wavefront sensor with horizontal multi-channel pixel output
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Abstract
In this paper, a real-time pipeline centroid calculating structure based on programmable logic devices is designed for Hartmann wavefront sensor with horizontal multi-channel pixel output. The pipeline consists of modularized cells including multiplier groups, accumulation cells, dividers and corresponding control units. The structure is specially designed to deal with simultaneously output pixels which belong to two adjacent subapertures as well as those pixels belong to the same subaperture. When the number of output channels is 8 and pixels output at 80MHz clock frequency, centroid calculation latency in simulation is less than 0.5μs.
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Shaobai Wang, Shaobai Wang, Chunhong Wang, Chunhong Wang, Changhui Rao, Changhui Rao, } "Pipeline structure for real-time centroid calculation of Hartmann wavefront sensor with horizontal multi-channel pixel output", Proc. SPIE 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, 81940P (18 August 2011); doi: 10.1117/12.899034; https://doi.org/10.1117/12.899034
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