Method and system of time-domain optical coherence tomography without depth scan

A technology of optical coherence tomography and imaging method, which is applied to the measurement of phase influence characteristics, etc., and can solve problems such as complex conjugate mirror parasitic images

Inactive Publication Date: 2012-08-08
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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However, like traditional FD-OCT, parallel FD-OCT still ...

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  • Method and system of time-domain optical coherence tomography without depth scan
  • Method and system of time-domain optical coherence tomography without depth scan
  • Method and system of time-domain optical coherence tomography without depth scan

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0046] see figure 1 . figure 1 It is a schematic diagram of the optical path and structure of the time-domain optical coherence tomography system without depth scanning in the present invention. Depend on figure 1 It can be seen that the time-domain optical coherence tomography system without depth scanning in the present invention includes a low-coherence light source 1, and a collimator beam expander 2 and a Michelson interferometer 3 are sequentially placed in the illumination direction of the low-coherence light source 1. The Michelson The beam-splitting prism 31 of the interferometer 3 divides the incident light into a detection arm optical path 34 and a reference arm optical path 32. The end of the reference arm optical path 32 is a cylindrical convex mirror 36 and ...

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Abstract

The invention provides a method and a system of time-domain optical coherence tomography without depth scan. On the basis of a time-domain optical coherence tomography method, the method of the invention comprises substituting convex lens with cylindrical surface for focusing lens interfering with a reference arm to form linear reference light, introducing continuous light path difference in a linear length direction of the reference light through tilting a reference planar mirror of the reference arm, substituting a one-dimensional detector array for a point photoelectric detector, acquiring interference signals of a sample to be measured at continuous different depth of a same detecting point, carrying out a Hilbert transformation analysis on the interference signals in the linear length direction of the reference light after removing direct current background, and finally obtaining a tomographic profile of the sample to be measured. The method and the system of the invention can realize one-dimensional optical coherence tomography with single exposure, and have the advantages of a simple structure, a high imaging speed, no parasitic image, and insensitivity to motion blur. In a situation of not sacrificing a system signal-to-noise ratio, time-domain optical coherence tomography without depth scan can be realized.

Description

technical field [0001] The present invention relates to optical coherence tomography (Optical Coherence Tomography, OCT for short), in particular to a method and system for Time-domain Optical Coherence Tomography (TD-OCT for short) without depth scanning. Background technique [0002] Optical coherence tomography (OCT) is an optical tomography technology developed in recent years. It can perform high-resolution non-invasive imaging of microstructures within a few millimeters in highly scattering media such as biological tissues. It has broad application prospects in the fields of living tissue imaging and medical imaging diagnosis. [0003] The earliest OCT system was time-domain optical coherence tomography (TD-OCT) (see prior art [1], D. Huang, E.A. Swanson, C.P. Lin, J.S. Schuman, W.G. Stinson, W. Chang, M.R. Hee , T. Flotte, K. Gregory, C.A. Puliafito and J.G. Fujimoto, "Optical coherence tomography", Science, Vol.254, pp.1178-1181, 1991). It scans the axial depth of ...

Claims

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Application Information

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IPC IPC(8): G01N21/45
Inventor 黄炳杰王向朝步鹏南楠郭昕
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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