
Proceedings Paper
High delay precision based on dynamic phase-shift for range-gated laser imaging technologyFormat | Member Price | Non-Member Price |
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Paper Abstract
The range-gated laser imaging technology has become a useful technique in many applications in recent years. In
order to expand the range of imaging detection and improve the measurement range resolution of the imaging system, we
used circular step advance delay sequence for the synchronous control. And we developed a method of using dynamic
phase-shift technique in FPGA to improve the precision of the delay in the time sequence, which can make the precision
of the delay stepper between the two adjacent frames less than global clock period of the FPGA and approach the limit of
FPGA’s operating frequency. That is to say, it can equivalently increase the clock frequency. Then we can effectively
improve measurement range resolution of the imaging system. In this paper, we have studied how dynamic phase-shift
technique can be equivalent to higher clock frequency and performed some experiments. We presented the structure of
dynamic phase-shift technique used to improve the precision of delay in the synchronization control time sequence. And
the simulation and experimental results are showed in this paper. The results demonstrate that using dynamic phase-shift
technique in FPGA can make the precision of the delay between the ICCD’s trigger pulse and the laser’s trigger pulse
reach 1ns, which means the resolution of measurement range can be 0.15m theoretically. The timing control signal with
dynamic phase-shift technique designed in this paper can be widely used in range-gated imaging because of its high
timing control precision and flexible parameter setting.
Paper Details
Date Published: 19 September 2013
PDF: 9 pages
Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051I (19 September 2013); doi: 10.1117/12.2034300
Published in SPIE Proceedings Vol. 8905:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications
Farzin Amzajerdian; Astrid Aksnes; Weibiao Chen; Chunqing Gao; Yongchao Zheng; Cheng Wang, Editor(s)
PDF: 9 pages
Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051I (19 September 2013); doi: 10.1117/12.2034300
Show Author Affiliations
Published in SPIE Proceedings Vol. 8905:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications
Farzin Amzajerdian; Astrid Aksnes; Weibiao Chen; Chunqing Gao; Yongchao Zheng; Cheng Wang, Editor(s)
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