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

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- Infrared and Laser Engineering
- Vol. 50, Issue 10, 20200454 (2021)

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. 2. Defocus detection system light path diagram
![[in Chinese]](/Images/icon/loading.gif)
Fig. 3. [in Chinese]

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

Fig. 6. Comparison curve of defocus measurement
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Table 1. Measurement data
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Table 2. Experimental analysis results

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