Infrared and Laser Engineering, Volume. 50, Issue 10, 20200454(2021)
Application of split-image mirror in defocus detection of laser rangefinder
Figures & Tables(9)
Fig. 1. Schematic diagram of split-image mirror imaging. (a) After the equal thickness； (b) Before the equal thickness line； (c) Above the equal thickness
Fig. 3. Schematic diagram of the relationship between the defocus detection accuracy and the apex angle of the split-image mirror, the ratio of the focal length of the tested system to the focal length of the detection system
Fig. 4. System inspection diagram. (a) Installation drawing； (b) Sketch map
Fig. 5. Defocus information displayed by computer. (a) Unfocused state； (b) Defocus state
Table 1. Measurement data
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ACT/mm MEA MEA average/mm 1 2 3 4 5 I 1 0.986 1.005 0.985 0.995 1.012 0.997 II 2 1.971 2.022 2.024 1.973 1.992 1.996 III 3 2.957 3.024 3.002 3.041 2.987 3.006 Ⅳ 4 4.051 4.033 3.947 4.046 3.965 4.008 Ⅴ 5 5.066 4.929 5.063 5.020 4.981 5.012 Ⅵ 6 5.920 6.080 5.995 6.051 6.025 6.014
Table 2. Experimental analysis results
View tableView in ArticleTable 2. Experimental analysis results
Standard deviation/mm Maximum error/mm Limit error/mm I 1.181×10−2 0.015 1.373×10−2 II 2.564×10−2 0.029 2.982×10−2 III 3.289×10−2 0.043 3.824×10−2 Ⅳ 4.870×10−2 0.051 5.663×10−2 Ⅴ 5.795×10−2 0.071 6.738×10−2 Ⅵ 6.132×10−2 0.080 7.131×10−2
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Mingze Qin, Yuan Hu, Wenjun He, Yang Zheng, Yuhao Chu, Xiyao Yuan, Wenxuan Li. Application of split-image mirror in defocus detection of laser rangefinder[J]. Infrared and Laser Engineering, 2021, 50(10): 20200454
Paper Information
Category: Photoelectric measurement
Received: Dec. 20, 2020
Accepted: --
Published Online: Dec. 7, 2021
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