The effect of fog on the probability density distribution of the ranging data of imaging laser radar
Wenhua Song,
JianCheng Lai,
Zabih Ghassemlooy,
Zhiyong Gu,
Wei Yan,
Chunyong Wang,
Zhenhua Li
Affiliations
Wenhua Song
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
JianCheng Lai
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Zabih Ghassemlooy
Optical Communications Research Group, NCRLab, Faculty of Engineering & Environment, University of Northumbria at Newcastle, Newcastle upon Tyne NE1 8ST, UK
Zhiyong Gu
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Wei Yan
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Chunyong Wang
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Zhenhua Li
Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
This paper outlines theoretically investigations of the probability density distribution (PDD) of ranging data for the imaging laser radar (ILR) system operating at a wavelength of 905 nm under the fog condition. Based on the physical model of the reflected laser pulses from a standard Lambertian target, a theoretical approximate model of PDD of the ranging data is developed under different fog concentrations, which offer improved precision target ranging and imaging. An experimental test bed for the ILR system is developed and its performance is evaluated using a dedicated indoor atmospheric chamber under homogeneously controlled fog conditions. We show that the measured results are in good agreement with both the accurate and approximate models within a given margin of error of less than 1%.
