红外与激光工程, 2021, 50 (2): 20200208, 网络出版: 2021-03-22 复制并引用该论文  本文已被引 3 次  被引通知

图 & 表

图 1. Schematic diagram of initial structure of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统初始结构示意图

Fig. 1.

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图 2. 2D layout of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统二维布局图

Fig. 2.

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图 3. 3D layout of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统三维布局图

Fig. 3.

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图 4. Results of the pupil distribution in the medium-wave infrared polarization imaging optical system中波红外偏振成像光学系统入瞳处分孔径结果

Fig. 4.

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图 5. Spot diagram of single channel of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统单通道点列图

Fig. 5.

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图 6. MTF of single channel of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统单通道MTF图

Fig. 6.

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图 7.

Fig. 7.

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图 7. OPD of single channel of aperture sharing medium-wave infrared polarization imaging optical system分孔径中波红外偏振成像光学系统单通道像差曲线

Fig. 7.

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图 8. Statistical results of tolerance analysis公差分析统计结果

Fig. 8.

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图 9. Schematic diagram of cold reflection ray-tracing冷反射光线追迹图

Fig. 9.

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表 1

Realization and characteristics of polarization imaging

偏振成像实现方式及特点

Table1.

Imaging method Advantages Disadvantages Time-sharing polarization imaging Rotating polarizer Simple system structure; Low cost; Small energy loss; High spatial resolution Poor real-time performance; Poor reliability of moving parts Electrically tuned LCD Simple system structure; Small size; Easy to adjust; High spatial resolution Poor real-time performance; Large energy loss Simultaneous polarization imaging Amplitude sharing Good real-time performance; High spatial resolution Complex structure; High adjustment requirements; Big size; Large energy loss; High cost Aperture sharing Good real-time performance; Relatively low cost; Compact structure Relatively complex structure; Loss of spatial resolution Focal plane sharing Good real-time performance; Small size; Compact structure; High integration High adjustment requirements; Instantaneous field of view error; Loss of spatial resolution

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表 2

Parameters of the designed optical system

光学系统性能参数

Table2.

Parameter Value Wavelength/μm 3.7-4.8 Focal length/mm 240 F# 6 Field/(°) 1.15×0.92 Number of pixels 320×256 Pixel size/μm2 30×30

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表 3

Comparison of aperture sharing medium-wave infrared polarization imaging optical system

中波红外分孔径偏振成像光学系统比较

Table3.

Structure of polarization imaging optical system Number of optical elements per channel Transmittance estimation 注：根据当前红外透镜镀膜工艺水平以及线偏振片的性能，透过率估算过程中取红外透镜单面透过率为98%，偏振片透过率为85% 12 lenses 1 polarizer 52.4% 10 lenses 1 polarizer 56.8% 13 lenses 1 polarizer 50.2% 12 lenses 2 wave plates 1 polarizer < 48.3%

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表 4

Tolerance limits

公差分配表

Table4.

Surface Tolerance Test plate fit 1-16 2 Irregularity 1-16 0.5 Thickness/mm 1-16 0.02 Decenter/mm 1-16 0.02 Tilt/(″) 1-4 30 5-16 40

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表 5

Result of cold reflection analysis

冷反射分析结果

Table5.

Surface Clipping aperture YNI/mm I/IBAR 1 13 (R) 1.726 3.85 2 13 (R) −2.12 1.924 3 13 (R) −2.206 2.024 4 13 (R) −0.623 1.283 5 13 (R) −0.395 1.578 6 13 (R) −0.393 1.578 7 13 (R) 0.486 −1.887 8 13 (R) 0.096 −0.382 9 13 (R) −0.95 4.703 10 13 (R) −0.416 1.845 11 13 (R) −0.471 2.253 12 13 (R) −0.919 5.709 13 20 (R) 0.169 2.086 14 20 (F) 0.043 −0.249 15 20 (R) 0.693 2.647 16 20 (F) 0.167 −1.241

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刘星洋, 翟尚礼, 李靖, 汪洋, 苗锋, 杜瀚宇, 邹超凡. 制冷型中波红外偏振成像光学系统设计[J]. 红外与激光工程, 2021, 50(2): 20200208. Xingyang Liu, Shangli Zhai, Jing Li, Yang Wang, Feng Miao, Hanyu Du, Chaofan Zou. Design of cooled medium-wave infrared polarization imaging optical system[J]. Infrared and Laser Engineering, 2021, 50(2): 20200208.