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Laser & Optoelectronics Progress, Volume. 57, Issue 15, 152202(2020)

Design of Front Objective for Digital Slit-Lamp Microscope System

Youping Huang1、*, Feng Lin2, Shuyan Huang1, and Dongying Chen1
Author Affiliations
  • 1Laboratory of Advanced Sensing Technology, College of Electronics and Information Science, Fujian Jiangxia University, Fuzhou, Fujian 350108, China
  • 2College of Photoelectric and Information Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (20)
    Cited By (1)
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    Figures & Tables(9)
    Digital slit-lamp microimaging system structure

    Fig. 1. Digital slit-lamp microimaging system structure

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    Slit-lamp microscope of coaxial system

    Fig. 2. Slit-lamp microscope of coaxial system

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    Ideal optical path of front objective lens

    Fig. 3. Ideal optical path of front objective lens

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    Optical path of optical system with different magnifications. (a) Low magnification; (b) high magnification

    Fig. 4. Optical path of optical system with different magnifications. (a) Low magnification; (b) high magnification

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    Spot images with different magnifications. (a) Low magnification; (b) high magnification

    Fig. 5. Spot images with different magnifications. (a) Low magnification; (b) high magnification

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    MTF curves with different magnifications. (a) Low magnification; (b) high magnification

    Fig. 6. MTF curves with different magnifications. (a) Low magnification; (b) high magnification

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    Relationship between element eccentricity and aberration. (a) Element eccentricity and coma; (b) element eccentricity and astigmatism

    Fig. 7. Relationship between element eccentricity and aberration. (a) Element eccentricity and coma; (b) element eccentricity and astigmatism

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    • Table 1. Values of tolerance

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      Table 1. Values of tolerance

      Tolerance typeValue
      Radius/fringe3
      Surface irregularity/fringe0.3
      Center thickness /mm0.02
      Eccentricity of surface andcomponent /mm0.01-0.02
      Inclination of surface and element /(')2
      Refractive index0.001
      Abbe of material /%1

    • Table 2. Monte Carlo analysis results

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      Table 2. Monte Carlo analysis results

      Number ofsamples /%Low magnificationHigh magnification
      RMSradius /μmRMSradius /μm
      <902.8015.174
      <802.6274.839
      <502.5134.353
      <202.0274.110
      <101.8214.079
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    Youping Huang, Feng Lin, Shuyan Huang, Dongying Chen. Design of Front Objective for Digital Slit-Lamp Microscope System[J]. Laser & Optoelectronics Progress, 2020, 57(15): 152202

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Oct. 23, 2019

    Accepted: Dec. 11, 2019

    Published Online: Aug. 4, 2020

    The Author Email: Youping Huang (986930890@qq.com)

    DOI:10.3788/LOP57.152202

    Topics

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