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Chinese Optics Letters, Volume. 16, Issue 3, 031701(2018)

Measurement of ocular axial length using full-range spectral-domain low-coherence interferometry

Yi Wang1, Liang Feng1, Lida Zhu2, Hongxian Zhou1, and Zhenhe Ma1、*
Author Affiliations
  • 1School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China
  • 2School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China
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    Schematic of recognition of (a) positive and (b) negative depths.

    Fig. 1. Schematic of recognition of (a) positive and (b) negative depths.

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    (a) Schematic of the experimental setup. (b)–(d) Schematics of the rotating disk: (b) No reference and probe beams travel through the disk; (c) probe beam PB1 and reference beam RB1 travel through windows W3 and W11, respectively; (d) probe beam PB1 and reference beam RB1 pass through windows W3 and W12, respectively. SLD, super-luminescent diode; FC, fiber coupler; C, collimator; NPBS, non-polarizing beam splitter; L, lens; M, mirror; RD, rotating disk; TG, transmission grating; SM, servo motor; FT, fixation target; DM, dichroic mirror; PB, probing beam; RB, reference beam; W, optical window.

    Fig. 2. (a) Schematic of the experimental setup. (b)–(d) Schematics of the rotating disk: (b) No reference and probe beams travel through the disk; (c) probe beam PB1 and reference beam RB1 travel through windows W3 and W11, respectively; (d) probe beam PB1 and reference beam RB1 pass through windows W3 and W12, respectively. SLD, super-luminescent diode; FC, fiber coupler; C, collimator; NPBS, non-polarizing beam splitter; L, lens; M, mirror; RD, rotating disk; TG, transmission grating; SM, servo motor; FT, fixation target; DM, dichroic mirror; PB, probing beam; RB, reference beam; W, optical window.

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    Distinguishing between positive and negative depths. The glass slide is located in (a) positive and (b) negative depth ranges. (c) The zero delay line is positioned between the two surfaces of the glass slide.

    Fig. 3. Distinguishing between positive and negative depths. The glass slide is located in (a) positive and (b) negative depth ranges. (c) The zero delay line is positioned between the two surfaces of the glass slide.

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    Representative results of (a) cornea and (b) retina.

    Fig. 4. Representative results of (a) cornea and (b) retina.

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    • Table 1. Experimental Results with the Presented System and with IOL Master 500 (mm)a

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      Table 1. Experimental Results with the Presented System and with IOL Master 500 (mm)a

       Right EyeLeft Eye
       Presented SystemIOL MasterPresented SystemIOL Master
      VolunteerCTALALCTALAL
      10.4723.6423.190.4724.6624.67
      20.5225.1525.240.5224.9424.50
      30.5325.8826.040.5425.5825.38
      40.5025.1524.800.5024.8524.90
      50.5524.8924.870.5524.8324.62
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    Yi Wang, Liang Feng, Lida Zhu, Hongxian Zhou, Zhenhe Ma, "Measurement of ocular axial length using full-range spectral-domain low-coherence interferometry," Chin. Opt. Lett. 16, 031701 (2018)

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    Paper Information

    Category: Medical optics and biotechnology

    Received: Oct. 25, 2017

    Accepted: Jan. 4, 2018

    Published Online: Jul. 13, 2018

    The Author Email: Zhenhe Ma (wangyi@neuq.edu.cn)

    DOI:10.3788/COL201816.031701

    Topics

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