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| Pipeline Structure Design for Real-time Centroid Calculation of HartmannWavefront
Sensor with Parallel Multi-channel Pixel Output |
| Song Lu1，Wang Shaobai2 |
| Henan University of Science and Technology, Luoyang 471009,Henan;
2. Luoyang Institute of Electro-optical Equipment of AVIC |
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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 structure is composed of multiplier groups, accumulation
cells and dividers. The cells are designed according to the number of output channels and the output pixels’sequence. The centroid
calculation latency in one frame is only the calculation time needed for the pixels output at the last pixel clock. In the simulation,
when output channels’number is 8 and pixels output at 80MHz clock, centroid calculation latency is less than 0.5μs.
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Published: 10 November 2017
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