• Infrared and Laser Engineering
  • Vol. 50, Issue 10, 20210091 (2021)
Lingying Chang1, Qiang Zhang1、*, Yuehong Qiu2, and Rong Zhang1
Author Affiliations
  • 1School of Electronic Engineering, Xi’an University of Posts & Telecommunications, Xi’an 710121, China
  • 2Xi’an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
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    DOI: 10.3788/IRLA20210091 Cite this Article
    Lingying Chang, Qiang Zhang, Yuehong Qiu, Rong Zhang. Design of telecentric relay optical system with broadband and real entrance pupil[J]. Infrared and Laser Engineering, 2021, 50(10): 20210091 Copy Citation Text show less
    Schematic diagram of coaxial three-mirror optical system
    Fig. 1. Schematic diagram of coaxial three-mirror optical system
    Diagram of position of aperture stop
    Fig. 2. Diagram of position of aperture stop
    Structural diagram of coaxial three-mirror optical system
    Fig. 3. Structural diagram of coaxial three-mirror optical system
    Structural diagram of relay optical system
    Fig. 4. Structural diagram of relay optical system
    MTF of relay optical system under different frequencies
    Fig. 5. MTF of relay optical system under different frequencies
    Distortion of relay optical system
    Fig. 6. Distortion of relay optical system
    Aberration curve of relay optical system
    Fig. 7. Aberration curve of relay optical system
    Spot diagram of relay optical system
    Fig. 8. Spot diagram of relay optical system
    System parameterRequirements
    Spectral band/μm0.4-5.0
    Focal length/mm400
    F number 3
    Field of view/(°)2ω=8
    Real entrance pupilAperture stop front;placed outside the optical system structure
    Table 1. Parameter of optical design
    Radius/mmThickness/mmDecenter/mmTilt/(°)
    First mirror−458.7815−107.591758.710.19
    Second mirror−167.2861134.61018.8110.09
    Third mirror−355.8577−107.8693−256.96−28.66
    Table 2. Parameters of off-axis three-mirror optical system
    ParametersFirst mirrorSecond mirrorThird mirror
    x2−7.4433e-0050.00031.8133e-005
    y23.2701e-0050.00041.8497e-005
    x2y3.6196e-0071.5541e-006−3.4655e-007
    y31.8164e-0071.2668e-0066.6196e-008
    x41.1032e-0091.2601e-0087.4445e-010
    x2y21.5319e-0091.6041e-008−2.6963e-009
    y47.6358e-0109.3326e-0092.0005e-009
    x2y33.1651e-0133.5955e-0111.7453e-011
    x4y−2.0905e-012−1.9364e-0101.8144e-011
    y5−2.8706e-013−9.5697e-012−8.4075e-012
    x62.4865e-0152.0033e-0136.4256e-014
    x4y2−3.6701e-015−2.0303e-013−5.8383e-014
    x2y46.3076e-0164.5629e-013−5.2467e-014
    y6−3.5416e-0166.6398e-0141.6164e-014
    Table 3. Parameters of free-form surface of each mirror
    Lingying Chang, Qiang Zhang, Yuehong Qiu, Rong Zhang. Design of telecentric relay optical system with broadband and real entrance pupil[J]. Infrared and Laser Engineering, 2021, 50(10): 20210091
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