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Acta Optica Sinica, Volume. 41, Issue 4, 0411004(2021)

Axial Resolution Calculation of OCT System Illuminated by a Non-Gaussian Spectrum Source

Xian Yue1,2,3, Yaliang Yang1,2、*, Ying Liu1,2,3, Hao Dai1,2,3, Fei Xiao1,2, and Chao Geng1,2
Author Affiliations
  • 1Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, Sichuan 610209, China
  • 2Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan 610209, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (6)
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    References (26)
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    Figures & Tables(6)
    Flowchart of axial resolution calculation

    Fig. 1. Flowchart of axial resolution calculation

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    Validity verification of the proposed method. (a1)(b1) PSD distribution; (a2)(b2) self-coherence function obtained by using the proposed method; (a3)(b3) coherence function provided by manufacturer

    Fig. 2. Validity verification of the proposed method. (a1)(b1) PSD distribution; (a2)(b2) self-coherence function obtained by using the proposed method; (a3)(b3) coherence function provided by manufacturer

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    Calculated δz using the proposed method for OCT system with a ultra-broadband source. (a) Original PSD distribution of adopted source; (b) self-coherence function obtained by the proposed method

    Fig. 3. Calculated δz using the proposed method for OCT system with a ultra-broadband source. (a) Original PSD distribution of adopted source; (b) self-coherence function obtained by the proposed method

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    Calculated δz for OCT system illuminated by a spectrum filtered source using the proposed method. (a) Transmission of filters; (b) PSD of spectrum-filtered source; (c) self-coherence function obtained with our method

    Fig. 4. Calculated δz for OCT system illuminated by a spectrum filtered source using the proposed method. (a) Transmission of filters; (b) PSD of spectrum-filtered source; (c) self-coherence function obtained with our method

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    Experimentally measured δz for OCT system illuminated by a spectrum filtered source. (a) Interference image; (b) interference fringe and its envelope

    Fig. 5. Experimentally measured δz for OCT system illuminated by a spectrum filtered source. (a) Interference image; (b) interference fringe and its envelope

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    • Table 1. Comparison of formula, claimed and theoretical values of axial resolution for different sources

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      Table 1. Comparison of formula, claimed and theoretical values of axial resolution for different sources

      SourceSpectral typeλ0 /nmFWHM /nmValue obtainedby formula /μmClaimedvalue /μmTheoreticalvalue /μm
      M-S-840-G-I-30Gaussian8402512.513.813.6
      BLM2-D-840-B-10Non-Gaussian8401003.14.44.3
      SLD-CS-531-HP3-SM-1050-IGaussian10503513.913.813.7
      SLD-CS-541-HP3-SM-1050-INon-Gaussian1050707.09.18.9
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    Xian Yue, Yaliang Yang, Ying Liu, Hao Dai, Fei Xiao, Chao Geng. Axial Resolution Calculation of OCT System Illuminated by a Non-Gaussian Spectrum Source[J]. Acta Optica Sinica, 2021, 41(4): 0411004

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    Paper Information

    Category: Imaging Systems

    Received: Aug. 5, 2020

    Accepted: Oct. 9, 2020

    Published Online: Feb. 26, 2021

    The Author Email: Yaliang Yang (ylyang@ioe.ac.cn)

    DOI:10.3788/AOS202141.0411004

    Topics

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