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Proceedings Paper

Pipeline structure for real-time centroid calculation of Hartmann wavefront sensor with horizontal multi-channel pixel output
Author(s): Shaobai Wang; Chunhong Wang; Changhui Rao
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Paper 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.

Paper Details

Date Published: 18 August 2011
PDF: 6 pages
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
Show Author Affiliations
Shaobai Wang, Institute of Optics and Electronics (China)
The Key Lab. on Adaptive Optics (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Chunhong Wang, Institute of Optics and Electronics (China)
The Key Lab. on Adaptive Optics (China)
Changhui Rao, Institute of Optics and Electronics (China)
The Key Lab. on Adaptive Optics (China)


Published in SPIE Proceedings Vol. 8194:
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications
Makoto Ikeda; Nanjian Wu; Guangjun Zhang; Kecong Ai, Editor(s)

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