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Dispersion compensation method based on Fourier domain optical coherence tomography

A technology of optical coherence tomography and dispersion compensation, which is applied to the measurement of phase influence characteristics, etc., can solve the problem of reducing system resolution, and achieve the effect of simple data processing, short time consumption and low complexity

Active Publication Date: 2021-11-09
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] To sum up, dispersion mismatch will reduce the resolution of the system. How to accurately and quickly perform dispersion compensation on the OCT system has always been a research hotspot in OCT.

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  • Dispersion compensation method based on Fourier domain optical coherence tomography
  • Dispersion compensation method based on Fourier domain optical coherence tomography
  • Dispersion compensation method based on Fourier domain optical coherence tomography

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Embodiment Construction

[0041] To make the objectives, technical solutions and advantages of the present invention will become more apparent, both embodiments referring to the drawings, the present invention is described in further detail.

[0042] like figure 1 As shown in the embodiment of the method of the present invention, dispersion compensation Fourier-domain optical coherence tomography based, includes the following steps:

[0043] Step 1, to obtain the A-scan signal interference FD-OCT system for imaging a sample;

[0044] Step 2, the interference signal is preprocessed to obtain a preprocessed signal interference, wherein the interference signal is the preprocessed samples containing only coherent light of the reference light signal;

[0045] Step 3, to provide a dispersion containing only the second order dispersion coefficient phase data items and third-order dispersion coefficients of terms;

[0046]Step 4, the interference signal is multiplied with the dispersion phase the pre-processed dat...

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Abstract

The invention discloses a dispersion compensation method based on Fourier domain optical coherence tomography. The dispersion compensation method comprises the following steps: acquiring an A-scan interference signal of an FD-OCT system for sample imaging; preprocessing the interference signal to obtain a preprocessed interference signal only containing a sample light reference light coherent signal from the interference signal; providing a dispersion phase data set only containing a second-order dispersion coefficient term and a third-order dispersion coefficient term; obtaining a depth space data set according to the preprocessed interference signal and the dispersion phase data set; obtaining dispersion compensation phase data through peak searching operation on the depth space data set; and obtaining depth image data after dispersion compensation according to the preprocessed interference signal and dispersion compensation phase data. According to the invention, accurate and fast dispersion compensation for FD-OCT system imaging is realized, and high-resolution imaging of the FD-OCT system is ensured while the real-time performance of data processing is ensured and the real-time imaging requirement is met.

Description

Technical field [0001] The present invention relates to optical signal processing technology, and particularly relates to dispersion compensation method based on a Fourier domain optical coherence tomography. Background technique [0002] Optical coherence tomography (Optical Coherence Tomography, OCT) is the end of the century in 1991, was first proposed by the David Huang and published in "Nature" magazine, it is a biomedical imaging technology, non-invasive, non-invasive, high-resolution, real-time It features imaging. The technology has since made three decades, OCT has been successfully used in oncology, dentistry, cardiology, dermatology and other medical fields, is the most successful application in ophthalmology, due to higher light transmittance of the lens, making OCT fundus can be high-resolution imaging, which helps doctors fundus lesions non-destructive testing and propose treatment options, diagnostic ophthalmic OCT technology has become the "gold standard." [0003...

Claims

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Application Information

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IPC IPC(8): G01N21/45
CPCG01N21/45
Inventor 郭翔宇孙利群
Owner TSINGHUA UNIV
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