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大变倍比制冷型红外双波段变焦光学系统设计

耿海涛 虞林瑶 张葆

耿海涛, 虞林瑶, 张葆. 大变倍比制冷型红外双波段变焦光学系统设计[J]. 中国光学(中英文). doi: 10.37188/CO.2024-0007
引用本文: 耿海涛, 虞林瑶, 张葆. 大变倍比制冷型红外双波段变焦光学系统设计[J]. 中国光学(中英文). doi: 10.37188/CO.2024-0007
GENG Hai-tao, YU Lin-yao, ZHANG Bao. Design of large-magnification-ratio cooled infrared dual-band zoom optical system[J]. Chinese Optics. doi: 10.37188/CO.2024-0007
Citation: GENG Hai-tao, YU Lin-yao, ZHANG Bao. Design of large-magnification-ratio cooled infrared dual-band zoom optical system[J]. Chinese Optics. doi: 10.37188/CO.2024-0007

大变倍比制冷型红外双波段变焦光学系统设计

doi: 10.37188/CO.2024-0007
基金项目: 国家重点科研项目(No. 303060302)
详细信息
    作者简介:

    耿海涛(1999—),男,山东潍坊人,中国科学院长春光学精密机械与物理研究所硕士研究生,主要从事光学设计方面的研究。E-mail:haitaogeng914@163.com

    张 葆(1966—),男,吉林磐石人,研究员,主要从事图像处理、光学设计、目标识别与跟踪的研究。E-mail:Zhangb@ciomp.ac.cn

  • 中图分类号: TP394.1;TH691.9

Design of large-magnification-ratio cooled infrared dual-band zoom optical system

Funds: Supported by
More Information
  • 摘要:

    第三代红外焦平面探测器的不断发展使得探测器具备同时对两个不同波段的红外辐射进行响应的能力,输出双波段对应图像,双波段图像在目标探测和识别领域前景广阔。本文针对航空探测应用,采用320×256双色红外制冷型探测器,设计了一种工作波段在中波3.7~4.8 μm和长波7.7~9.5 μm的大变倍比制冷型红外双波段变焦光学系统,用于对目标的红外探测。该光学系统采用折射式和折反式结构相结合的方式,实现光学四视场切换式大范围变焦,采用二次成像以达到100%冷光阑效率。该光学系统四视场焦距分别为32 mm、200 mm、800 mm、1600 mm,变倍比为50×。实验结果表明,光学系统在双波段各变倍状态下,在调制传递函数特征频率为17 lp/mm时均接近衍射极限。该光学系统具有双波段、变倍范围大、大变倍比、快速切换多视场、结构简单紧凑、高质量成像等特征,将在搜索、侦察等安防领域中得到广泛应用。

     

  • 图 1  光学系统结构原理图

    Figure 1.  Optical system structure schematic diagram

    图 2  光学系统结构图。(a)短焦;(b)中焦;(c)长焦;(d)超长焦

    Figure 2.  Optical system structure diagrams. (a) short focus; (b) middle focus; (c) long focus; (d) super long focus

    图 3  MTF曲线。(a)中波短焦;(b)长波短焦;(c)中波中焦;(d)长波中焦;(e)中波长焦;(f)长波长焦;(g)中波超长焦;(h)长波超长焦

    Figure 3.  MTF curves. (a) MWIR short focus; (b) LWIR short focus; (c) MWIR middle focus; (d) LWIR middle focus; (e) MWIR long focus; (f) LWIR long focus; (g) MWIR super long focus; (h) LWIR super long focus

    图 4  弥散斑点列图。(a)中波短焦;(b)长波短焦;(c)中波中焦;(d)长波中焦;(e)中波长焦;(f)长波长焦;(g)中波超长焦;(h)长波超长焦

    Figure 4.  Diffuse speckle diagrams. (a) MWIR short focus; (b) LWIR short focus; (c) MWIR middle focus; (d) LWIR middle focus; (e) MWIR long focus; (f) LWIR long focus; (g) MWIR super long focus; (h) LWIR super long focus

    图 5  畸变曲线。(a)中波短焦;(b)长波短焦;(c)中波中焦;(d)长波中焦;(e)中波长焦;(f)长波长焦;(g)中波超长焦;(h)长波超长焦

    Figure 5.  Distortion curves. (a) MWIR short focus; (b) LWIR short focus; (c) MWIR middle focus; (d) LWIR middle focus; (e) MWIR long focus; (f) LWIR long focus; (g) MWIR super long focus; (h) LWIR super long focus

    图 6  衍射圈入能量图。(a)中波短焦;(b)长波短焦;(c)中波中焦;(d)长波中焦;(e)中波长焦;(f)长波长焦;(g)中波超长焦;(h)长波超长焦

    Figure 6.  Diffraction circle into the energy diagrams. (a) MWIR short focus; (b) LWIR short focus; (c) MWIR middle focus; (d) LWIR middle focus; (e) MWIR long focus; (f) LWIR long focus; (g) MWIR super long focus; (h) LWIR super long focus

    图 7  第7面冷反射光路追迹图

    Figure 7.  Cold-reflected optical path trace on the 7th surface

    表  1  光学系统设计指标

    Table  1.   Optical system design specifications

    项目指标
    工作波段/μm3.7~4.8&7.7~9.5
    焦距/mm32;200;800;1600
    FOV/(°)21.75;3.52;0.88;0.44
    F数4.0;8.0
    变焦倍率50×
    冷屏到像面间隔/mm20
    总长/mm300
    下载: 导出CSV

    表  2  宽波段红外材料

    Table  2.   Wide-band infrared materials

    材料 透射范围
    (μm)
    折射率
    (4 μm)
    阿贝数
    (3~5 μm)
    阿贝数
    (8~12 μm)
    Ge 2~12 4.0247 103.4 834.3
    ZnSe 0.55~18 2.4331 176.9 58.0
    ZnS(BROAD) 0.42~18.2 2.3468 109.63 22.9
    AMTIR1 1~14 2.5144 196.7 115.2
    下载: 导出CSV

    表  3  冷反射严重面中波/长波YNI和I/IBAR值

    Table  3.   Cold Reflection Severe Surface MWIR/LWIR YNI and I/IBAR Values

    表面5671014
    YNI−0.811−0.8490.0440.1760.516
    −0.806−0.8450.0470.1850.522
    I/IBAR0.3190.3570.1070.1540.541
    0.3200.3570.1290.1690.550
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-08
  • 录用日期:  2024-04-22
  • 网络出版日期:  2024-05-17

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