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Chinese Optics Letters, Volume. 18, Issue 7, 072201(2020)

Dynamic aberrations correction of Roll-Nod conformal seeker based on the diffraction surface and anamorphic asphere surface

Yunqiang Zhang1,2, Jun Chang1、*, Fanyang Dang3、**, Xiaodong Bai2, and Guoqing Pan2
Author Affiliations
  • 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons, Luoyang Optoelectro Technology Development Center, Luoyang 471009, China
  • 3Key Laboratory of In-fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin 150001, China
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    Figures&Tables (12)
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    References (22)
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    Figures & Tables(12)
    Schematic diagram of a conformal optical system.

    Fig. 1. Schematic diagram of a conformal optical system.

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    Amplitudes of Zernike coefficients of wavefronts passing through a conformal dome.

    Fig. 2. Amplitudes of Zernike coefficients of wavefronts passing through a conformal dome.

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    Arch corrector machined by OPTIMAX company.

    Fig. 3. Arch corrector machined by OPTIMAX company.

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    Conformal seeker with an arch corrector. (a) 0° Roll and 45° Nod; (b) 30° Roll and 45° Nod.

    Fig. 4. Conformal seeker with an arch corrector. (a) 0° Roll and 45° Nod; (b) 30° Roll and 45° Nod.

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    Correcting method of dynamic aberrations based on the diffraction surface and anamorphic asphere surface.

    Fig. 5. Correcting method of dynamic aberrations based on the diffraction surface and anamorphic asphere surface.

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    Phase curve of diffraction surface after optimizing.

    Fig. 6. Phase curve of diffraction surface after optimizing.

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    Conformal optical system after optimizing. (a) 0° look angle; (b) 70° look angle.

    Fig. 7. Conformal optical system after optimizing. (a) 0° look angle; (b) 70° look angle.

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    Designed structure of conformal seeker.

    Fig. 8. Designed structure of conformal seeker.

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    Spot diagrams of the conformal system at different look angles. (a) 0°; (b) 30°; (c) 50°; (d) 70°.

    Fig. 9. Spot diagrams of the conformal system at different look angles. (a) 0°; (b) 30°; (c) 50°; (d) 70°.

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    MTF of the conformal system at different look angles. (a) 0°; (b) 30°; (c) 50°; (d) 70°.

    Fig. 10. MTF of the conformal system at different look angles. (a) 0°; (b) 30°; (c) 50°; (d) 70°.

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    • Table 1. Design Parameters of Conformal Optical System

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      Table 1. Design Parameters of Conformal Optical System

      TermParameter Value
      Material of domeMgF2
      Diameter D135 mm
      Fineness ratio F1
      Thickness at vertex t13.8 mm
      Entrance pupil diameter35 mm
      Field of view3°×3°
      Field of regard±70°
      Design wavelength3–5 μm

    • Table 2. Parameters of Conformal Optical System after Optimization

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      Table 2. Parameters of Conformal Optical System after Optimization

      SurfaceTypeRadiusThicknessGlassConic
      1Asphere43.753.80IRT1−0.71
      2Asphere21.4032.20−0.62
      3Asphere255.262.82Ge−21.90
      4Asphere164.532.2026.28
      5Asphere27.2410.2Si−1.26
      6Asphere 52.915.18−2.37
      7Asphere 19.233.08Ge
      8Asphere10.1616.600.39
      9Anamorphic Asphere−12.00Mirror
      10SphereInfinityPrism
      11Sphere33.372.82CaFL
      12Sphere 55.297.86
      13Asphere27.843.15Si−0.73
      14Sphere25.1171.36
      15Sphere1761.318.00ZnSe
      16Asphere−26.495.20−1.40
      17Sphere−656.838.45Ge
      18Sphere188.474.72
      19Sphere Infinity0.30Ge
      20SphereInfinity20.30
      IMASphereInfinity
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    Yunqiang Zhang, Jun Chang, Fanyang Dang, Xiaodong Bai, Guoqing Pan, "Dynamic aberrations correction of Roll-Nod conformal seeker based on the diffraction surface and anamorphic asphere surface," Chin. Opt. Lett. 18, 072201 (2020)

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Mar. 10, 2020

    Accepted: Apr. 3, 2020

    Posted: Apr. 3, 2020

    Published Online: May. 26, 2020

    The Author Email: Jun Chang (optics_chang@126.com), Fanyang Dang (dangfy@hrbeu.edu.cn)

    DOI:10.3788/COL202018.072201

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology