Complex spectral domain optical coherence tomography method and system

A technology of optical coherence tomography and imaging system, which is applied in the field of optical coherence tomography, can solve the problems of many technical links, complex structure and so on, and achieve the goal of depth detection with simple system structure, wide dynamic range and full dynamic range Effect

Inactive Publication Date: 2008-11-05
SHENZHEN POLYTECHNIC
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Therefore, the system has the defects of m

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  • Complex spectral domain optical coherence tomography method and system
  • Complex spectral domain optical coherence tomography method and system
  • Complex spectral domain optical coherence tomography method and system

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[0032] The following content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

[0033] 1. The principle of the present invention's complex spectrum frequency domain OCT technology

[0034] 1. Design principle of combined interferometer

[0035]The combined interferometer in the present invention is composed of three fiber-type Michelson interferometers. The usual Michelson interferometer has a light source arm, a detection arm, a sample arm and a reference arm. The present invention uses two 1×3 fiber coupl...

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Abstract

The invention provides a tomographic method and a system for coherent optics in complex spectrum frequency domain, comprising a broadband light source, a light source coupling mechanism, a combined interferometer, a fiber-optics imaging probe, a spectrograph, a temperature controller and a computer; the method comprises the following steps of: firstly, measuring three groups of interference spectrum in state of three different phases of reference light; secondly, calculating two groups of differential interference spectrums; thirdly, taking the sum and the remainder of the two groups of differential interference spectrums as a real part and an imaginary part for a complex amplitude so as to reconstruct the interference spectrum of the complex amplitude in a wave number space; finally, making an inverse Fourier transform for the interference spectrum of the complex amplitude and obtaining depth-scanning information of a measured sample along an optical axis, that is chromatogram. Under the condition that a regulating device for the phase of the reference light is not used, the tomographic method and the system eliminate the effect for chromatogram quality caused by a parasitic image and a hetero conjugation image, and can realize the tomography which reflects the real structure of the measured sample with the advantages of simple system structure, wide dynamic scope and deep measurement in full scale.

Description

technical field [0001] The present invention relates to optical coherence tomography (Optical Coherence Tomography, OCT for short), in particular to a complex spectrum frequency domain optical coherence tomography (Complex SpectralDomain OCT) method and system. Background technique [0002] Optical coherence tomography (OCT) is a new type of biomedical imaging technology. With the characteristics of non-invasive, non-invasive, high-resolution and high-sensitivity, it can perform high-resolution tomographic imaging on the microstructure of living tissues, and its depth resolution can reach micron level, which is tenth of the existing medical imaging technology. times, it is helpful for the early detection and timely diagnosis of human diseased tissues. Early OCT is a time-domain optical coherence tomography technology. In order to obtain the axial depth information of the sample, the reference arm must scan the axial depth. It collects data point by point within the range of...

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Application Information

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IPC IPC(8): A61B5/00G06F19/00
Inventor 邹波
Owner SHENZHEN POLYTECHNIC
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