Infrared and Laser Engineering, Volume. 51, Issue 7, 20210771(2022)

Research on the parallelism of the active and passive dual-band (laser/IR) composite system

Fei Liu, Xiufen Chen, Songshan Li, and Zichen Nie
Author Affiliations
  • North China Research Institute of Electro-Optics, Beijing 100015, China
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    Figures & Tables(7)
    Schematic of the active and passive dual-band (laser/IR) composite system
    Relationship between light reflection and mirror position
    Projection relationship between the azimuth swing of the FSM and the laser azimuth, laser pitch
    Schematic diagram of the parallelism test
    Comparison chart of the given values and measured values before and after parallelism correction
    • Table 1. Calculation results of the changes in laser azimuth and pitch caused by the azimuth swing of the FSM

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      Table 1. Calculation results of the changes in laser azimuth and pitch caused by the azimuth swing of the FSM

      FSM azimuth angle /(°) Laser azimuth angleLaser pitch angle /μrad
      Theoretical calculation /(°) Approximate calculation /(°) Error Δ /μrad
      −1.00−1.414069−1.4142132.505175152.2993
      −0.75−1.060599−1.0606601.05698385.66360
      −0.50−0.707088−0.7071060.31320438.07120
      −0.25−0.353551−0.3535530.0391529.517574
      0.000000
      0.250.3535510.353553−0.0391529.517574
      0.500.7070880.707106−0.30320438.07120
      0.751.0605991.060660−1.05698385.66360
      1.001.4140691.414213−2.505175152.2993
    • Table 2. Record form of the test data

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      Table 2. Record form of the test data

      NumberTheoretical setting valueActual measured value
      Azimuth/(°)Pitch/(°)Azimuth/(°)Pitch/(°)
      1−1.40001.4000−1.45371.3453
      2−1.40000.9333−1.45350.9733
      3−1.40000.4667−1.35560.4267
      4−1.40000−1.3562−0.0362
      5−1.4000−0.4667−1.4053−0.5067
      6−1.4000−0.9333−1.3536−0.9833
      7−1.4000−1.4000−1.3934−1.4532
      8−0.93331.4000−0.98331.4263
      9−0.93330.9333−0.93330.8933
      10−0.93330.4667−0.98330.4267
      11−0.93330−0.98330.0243
      12−0.9333−0.4667−0.9433−0.4367
      13−0.9333−0.9333−0.8933−0.9835
      14−0.9333−1.4000−0.8933−1.4521
      15−0.46671.4000−0.50671.3421
      16−0.46670.9333−0.47670.9744
      17−0.46670.4667−0.50690.4267
      18−0.46670−0.44520.0021
      19−0.4667−0.4667−0.5049−0.5062
      20−0.4667−0.9333−0.4665−0.9833
      21−0.4667−1.4000−0.5024−1.4520
      2201.40000.05211.4150
      2300.93330.02130.9733
      2400.46670.01890.4267
      25000.0238−0.0321
      260−0.46670.0457−0.5064
      270−0.93330.0562−0.8933
      280−1.40000.0286−1.4569
      290.46671.40000.46671.3498
      300.46670.93330.50620.9733
      310.46670.46670.40520.4267
      320.466700.44620.0245
      330.4667−0.46670.5089−0.5067
      340.4667−0.93330.5011−0.9811
      350.4667−1.40000.4767−1.4502
      360.93331.40000.98341.3488
      370.93330.93330.94560.9344
      380.93330.46670.91200.4261
      390.933300.91330.0430
      400.9333−0.46670.8958−0.5043
      410.9333−0.93330.9726−0.9725
      420.9333−1.40000.9643−1.4501
      431.40001.40001.42221.3862
      441.40000.93331.42200.9734
      451.40000.46671.45010.4962
      461.400001.44980.0321
      471.4000−0.46671.4460−0.4391
      481.4000−0.93331.4508−0.9882
      491.4000−1.40001.3994−1.3968
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    Fei Liu, Xiufen Chen, Songshan Li, Zichen Nie. Research on the parallelism of the active and passive dual-band (laser/IR) composite system[J]. Infrared and Laser Engineering, 2022, 51(7): 20210771

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    Paper Information

    Category: Lasers & Laser optics

    Received: Oct. 25, 2021

    Accepted: Feb. 14, 2022

    Published Online: Dec. 20, 2022

    The Author Email:

    DOI:10.3788/IRLA20210771

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