• Opto-Electronic Engineering
  • Vol. 50, Issue 12, 230231-1 (2023)
Chengbin Jiang, Zhili Chen*, Xiaotong Wang, Yuan Zhang, and Shanshan Cheng
Author Affiliations
  • School of Optoelectronic Engineering, Xi 'an Technological University, Xi 'an, Shaanxi 710021, China
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    DOI: 10.12086/oee.2023.230231 Cite this Article
    Chengbin Jiang, Zhili Chen, Xiaotong Wang, Yuan Zhang, Shanshan Cheng. Design of compact off-axis triple mirror optical system[J]. Opto-Electronic Engineering, 2023, 50(12): 230231-1 Copy Citation Text show less
    Cook type three reverse system
    Fig. 1. Cook type three reverse system
    Compact structure diagram
    Fig. 2. Compact structure diagram
    Triaxial structure diagram
    Fig. 3. Triaxial structure diagram
    Ideal structure diagram
    Fig. 4. Ideal structure diagram
    Relationship between dbf/f and some parameters
    Fig. 5. Relationship between dbf/f and some parameters
    Range control diagram
    Fig. 6. Range control diagram
    Final design system structure diagram
    Fig. 7. Final design system structure diagram
    MTF diagram of the system in visible band
    Fig. 8. MTF diagram of the system in visible band
    MTF diagram of near infrared band of the system
    Fig. 9. MTF diagram of near infrared band of the system
    MTF diagram of mid-infrared band of the system
    Fig. 10. MTF diagram of mid-infrared band of the system
    System visible light band point diagram
    Fig. 11. System visible light band point diagram
    System near infrared band point diagram
    Fig. 12. System near infrared band point diagram
    System middle infrared band point diagram
    Fig. 13. System middle infrared band point diagram
    System distortion diagram
    Fig. 14. System distortion diagram
    指标项参数值
    焦距800 mm
    入瞳直径200 mm
    F数4
    光谱范围0.486~0.656 μm,0.78~2.5 μm,3~5 μm
    视场12°×6°
    像元尺寸可见光通道为3 μm,近红外通道为5 μm,中红外通道为17 μm
    成像要求可见光MTF(@160 lp/mm>0.2) 近红外MTF(@100 lp/mm>0.2) 中红外MTF(@30 lp/mm>0.2)
    Table 1. Table of the optical system design parameters
    曲率半径/mm厚度圆锥系数
    主镜−1641.935−330−4.118
    次镜−550.510330−0.919
    三镜−828.318−730.40
    Table 2. Initial structure parameter
    项目倾斜X/倾斜Y偏心X/偏心Y
    主镜±18.4°±800
    次镜±45°±565
    三镜±45°±1600
    Table 3. Tilt and eccentricity of the initial structure
    项目Z1Z2Z3Z4Z5Z6Z7
    −74.798−1.701×10−510.6740.164−4.348×10-70.0172.38×10-3
    Z8Z9Z10Z11Z12Z13Z14
    三镜−2.385×10−8−1.049×10−4−5.268×10−8−2.277×10−5−1.079×10−57.318×10−93.574×10−7
    Z15Z16Z17Z18Z19Z20
    3.034×10−95.154×10−117.969×10−77.156×10−108.6×10−98.421×10−10
    Table 4. Zernike standard free-form surface coefficient table
    公差类别公差项目主镜次镜三镜
    装调误差X方向偏轴/mm0.050.20
    Y方向偏轴/mm0.050.20
    X方向倾斜/(°)0.0050.0010
    Y方向倾斜/(°)0.0050.0010
    面型误差曲率半径/mm0.20.20.2
    波峰到波谷(PV值)/μm0.50.50.2
    Table 5. Error distribution table
    累积概率/%弥散斑RMS/mmMTF
    900.004763420.11910409
    800.004557300.15766662
    500.003967650.18865949
    200.003232140.23130557
    100.003086280.24853763
    Table 6. Monte Carlo cumulative probability statistic
    Chengbin Jiang, Zhili Chen, Xiaotong Wang, Yuan Zhang, Shanshan Cheng. Design of compact off-axis triple mirror optical system[J]. Opto-Electronic Engineering, 2023, 50(12): 230231-1
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