Infrared and Laser Engineering, Volume. 52, Issue 10, 20230028(2023)

Pixel design of large-scale resistor array infrared scene projector

Diaohao Zhai1,2, Yongping Chen1, Houming Zhai1, and Bin Ma1
Author Affiliations
  • 1Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(12)
    (a) Block diagram of the resistor array structure; (b) Schematic of infrared image generation
    (a) Pixel drive circuit of resistor array device; (b) Work flow of snap shot mode and scanning mode
    Micro emitter voltage VR& MOS tube driving efficiency vs. grating input voltageVin
    Vertically integrated structure (a) and sectional drawing (b) of the micro emitter
    Refractive index (n) (a) and extinction coefficient (k) (b) of SiNx and SiC films; Infrared optical characteristic simulation of micro emitter with and without SiC film (c)
    Temperature distribution (a) and displacement (b) simulation results of micro emitter under 0.6 mW
    Performance simulation results. (a) Apparent temperature vs power; (b) Radiance vs voltage control code; (c) Heat response curve
    MEMS process flow
    SEM micrograph of 640×410 micro emitter array sample
    LWIR image of 4×1 pixel driving in the air at the corner (a) and center (b) of a 640×410 array sample
    • Table 1. Parameters of micro emitter used in simulation

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      Table 1. Parameters of micro emitter used in simulation

      ParametersSiNxSiCTi
      Constant pressure heat capacity/J·kg−1·K−1690680.7522
      Material density/kg·m−3300029794506
      Thermal conductivity/W·m−1·K−13.25116.621.13
      Young’s modulus/GPa270400115.7
      Poison ratio0.2450.160.321
      Coefficient of thermal expansion/K−10.8e-62.7e-68.6e-6
    • Table 2. Heat properties and performance of micro emitter

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      Table 2. Heat properties and performance of micro emitter

      ItemLength/μm
      (L1,L2) =(19,2) (L1,L2) =(19,3) (L1,L2) =(19,4)
      C/×10−9 J·K−12.242.232.22
      GL/×10−6 W·K−10.81.21.6
      tresponse/ms 5.593.911.97
      MWIR Teff/K 832658565
      LWIRTeff/K 725582505
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    Diaohao Zhai, Yongping Chen, Houming Zhai, Bin Ma. Pixel design of large-scale resistor array infrared scene projector[J]. Infrared and Laser Engineering, 2023, 52(10): 20230028

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    Paper Information

    Category: Infrared technology and application

    Received: Jan. 13, 2023

    Accepted: --

    Published Online: Nov. 21, 2023

    The Author Email:

    DOI:10.3788/IRLA20230028

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