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A method for measuring axial resolution of oct system

A measurement method and resolution technology, applied in the field of optical detection, can solve the problems of inability to quickly measure, unsuitable for axial resolution measurement, complicated operation, etc., and achieve the effects of convenient measurement method, low cost, and easy operation.

Active Publication Date: 2022-07-12
SUZHOU MICROPORT ARGUS MEDICAL CORP
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] The current measurement methods for measuring axial rate resolution are often complicated to operate, cannot be measured quickly, and are not suitable for measuring the axial resolution of OCT in industrial applications.

Method used

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  • A method for measuring axial resolution of oct system
  • A method for measuring axial resolution of oct system
  • A method for measuring axial resolution of oct system

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Experimental program
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Embodiment

[0041] A method for measuring axial resolution for an OCT system (Argus OCT System Insight-100), the method comprising the following steps:

[0042] (1) The center wavelength of the OCT system is 1310nm, the sweep bandwidth is 105nm, the sweep frequency is 50KHz, and the number of sweep sampling points is 2048. The incident light emitted by the weakly coherent light source is divided into reference light and sampling light with a ratio of 10:90 through a 10:90 beam splitter. The reference light enters the reference arm equipped with a plane mirror; The reflection from the flat mirror returns to the OCT system. The sampling light enters the sampling arm, wherein the sampling arm port is connected with a fiber lens, and the optical path length of the reference arm is equal to the optical path length of the sampling arm of the OCT system. The sampling light is irradiated onto the sampling plane mirror through the fiber lens, and reflected by the sampling plane mirror. The reflec...

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Abstract

The present invention provides a method for measuring the axial resolution of an OCT system, comprising the following steps: dividing weakly coherent light into reference light and sampling light, the reference light is reflected back to the OCT system by a mirror of a reference arm, and the sampling light is The fiber lens and the sample are reflected back to the OCT system, and the sampled light and reference light reflected back to the system interfere in the OCT system to form an interference light signal; convert the interference light signal into an electrical signal, and process the electrical signal , to obtain the FFT spectrum; move the sampled object away from the fiber lens by Δz, the sequence number corresponding to the peak of the FFT spectrum changes as ΔN; the ratio of the Δz to the ΔN is the axial resolution of the OCT system . The method for obtaining the axial resolution of the OCT system is convenient, effective and low-cost, and the measurement method of the present invention can be used for OCT systems with different wavelengths and frequencies, and has universal applicability.

Description

technical field [0001] The invention relates to a method for measuring the axial resolution of an OCT system, which is suitable for the technical field of optical detection. Background technique [0002] In recent decades, the field of biomedical science has developed rapidly, and the research of life science has changed from traditional qualitative research to quantitative research, which puts forward high requirements for optical detection technology. Since the concept of Optical Coherence Tomography (OCT) was first proposed in 1991 at the Massachusetts Institute of Technology, it has developed rapidly in the past ten years. As an emerging optical detection technology, OCT can observe the tissue structure below the surface of the organism without damage, and has the high resolution required for histopathological analysis. It is expected to become an important means of biological optical imaging research. In order to meet the needs of more and broader basic research and cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00
CPCA61B5/0066A61B5/0033
Inventor 王正义侯利平明良裕冯庆宇吴振英
Owner SUZHOU MICROPORT ARGUS MEDICAL CORP
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