Imaging Components, Systems, and Processing

Depth resolution improvement of streak tube imaging lidar using optimal signal width

[+] Author Affiliations
Guangchao Ye, Rongwei Fan, Wei Lu, Zhiwei Dong, Xudong Li, Deying Chen

Harbin Institute of Technology, National Key Laboratory of Science and Technology on Tunable Laser, No. 92, Dazhi Street, Harbin 150001, China

Ping He

Harbin University of Commerce, College of Foundation Science, No. 1, Xuehai Street, Harbin 150028, China

Opt. Eng. 55(10), 103112 (Oct 26, 2016). doi:10.1117/1.OE.55.10.103112
History: Received June 26, 2016; Accepted October 11, 2016
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Abstract.  Streak tube imaging lidar (STIL) is an active imaging system that has a high depth resolution with the use of a pulsed laser transmitter and streak tube receiver to produce three-dimensional (3-D) range images. This work investigates the optimal signal width of the lidar system, which is helpful to improve the depth resolution based on the centroid algorithm. Theoretical analysis indicates that the signal width has a significant effect on the depth resolution and the optimal signal width can be determined for a given STIL system, which is verified by both the simulation and experimental results. An indoor experiment with a planar target was carried out to validate the relation that the range error decreases first and then increases with the signal width, resulting in an optimal signal width of 8.6 pixels. Finer 3-D range images of a cartoon model were acquired by using the optimal signal width and a minimum range error of 5.5 mm was achieved in a daylight environment.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Guangchao Ye ; Rongwei Fan ; Wei Lu ; Zhiwei Dong ; Xudong Li, et al.
"Depth resolution improvement of streak tube imaging lidar using optimal signal width", Opt. Eng. 55(10), 103112 (Oct 26, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.103112


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