Laser & Optoelectronics Progress, Volume. 61, Issue 17, 1723001(2024)

Electromagnetically Driven MEMS Micromirror with Torsion Beam Structure

Fan Xu1,2, Changsi Peng1, Zhongming Zeng2, and Dongmin Wu2、*
Author Affiliations
  • 1School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, Jiangsu, China
  • 2Nano-Fabrication Facility, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, Jiangsu, China
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    Figures & Tables(12)
    Schematic diagram of micro mirror package structure
    Schematic diagram of the structural division of beam
    Structure of two-dimensional MEMS micromirror and local schematic diagram. (a) Monolithic structure; (b) local structure
    Simulation analysis of MEMS micromirrors. (a) Fast axial stress distribution; (b) slow axial stress distribution; (c) stress distribution of fast axis of straight beam; (d) stress distribution of slow axis of straight beam
    Specular deformation analysis
    Manufacturing process of MEMS micromirrors. (a) Homogenization photolithography to form a mirror pattern; (b) electron beam evaporation mirror reflector; (c) lift off; (d) homogenized photolithography as an etching mask; (e) deep silicon etching out the structure
    Micromirror package structure. (a) Coil holes and embedded grooves; (b) complete assembly
    Schematic diagram of micromirror testing. (a) Test light path diagram; (b) two-dimensional scanning pattern
    Voltage corner response. (a) Slow axis response; (b) fast axis response
    Fast axis frequency response. (a) Simulation value; (b) experimental value
    Angle stability test
    • Table 1. Parameters of 2D MEMS micro mirrors

      View table

      Table 1. Parameters of 2D MEMS micro mirrors

      ParameterValue /mm
      Mirror length Lm6.00
      Mirror width Wm5.00
      Beam thickness H0.35
      Beam width W0.07
      Half length of the beam L2.75
      Bend radius R0.22
      Torsional beam clearance D0.15
      Width of annular structure b0.27
      Length of annular structure2.80
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    Fan Xu, Changsi Peng, Zhongming Zeng, Dongmin Wu. Electromagnetically Driven MEMS Micromirror with Torsion Beam Structure[J]. Laser & Optoelectronics Progress, 2024, 61(17): 1723001

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    Paper Information

    Category: Optical Devices

    Received: Nov. 28, 2023

    Accepted: Jan. 22, 2024

    Published Online: Sep. 11, 2024

    The Author Email: Dongmin Wu (dmwu2008@sinano.ac.cn)

    DOI:10.3788/LOP232569

    CSTR:32186.14.LOP232569

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