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Parallel complex frequency domain optical coherence tomography imaging method and system

A technology of optical coherence tomography and imaging methods, which can be applied in interference spectroscopy, optical devices, spectrum investigation, etc., and can solve problems such as complex conjugate mirror images

Active Publication Date: 2010-09-15
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, parallel frequency-domain OCT still has the problem of complex conjugate images and other spurious images

Method used

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  • Parallel complex frequency domain optical coherence tomography imaging method and system
  • Parallel complex frequency domain optical coherence tomography imaging method and system
  • Parallel complex frequency domain optical coherence tomography imaging method and system

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Embodiment Construction

[0070] 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.

[0071] see figure 1 and 2 . figure 1 It is a schematic diagram of the side view optical path and system structure of the parallel complex frequency domain optical coherence tomography system of the present invention. figure 2 It is a schematic diagram of the overhead optical path and system structure of the parallel complex frequency domain optical coherence tomography system of the present invention. Depend on figure 1 and 2 It can be seen that the parallel complex frequency domain optical coherence tomography system of the present invention includes a low-coherence light source 1, and a collimating beam expander 2, a cylindrical mirror 3, and a Michelson interferometer 4 are sequentially placed in the illumination direction of the low-coherence light source 1, The b...

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Abstract

The invention relates to parallel complex frequency domain optical coherence tomography imaging method and system, wherein the method comprises the following steps of: on the basis of the parallel complex frequency domain optical coherence tomography imaging method, replacing a reference plane reflector of an interference reference arm with an inclined reflection grating, and enabling the first-level diffraction light of incident reference light to reversely return along an original incident light path, thereby leading linear space phase modulation in a two-dimensional frequency domain interference strip along the direction of parallel detection, which is obtained by a two-dimensional photoelectric detector, i.e. leading a spatial carrier in the two-dimensional frequency domain interference strip; then carrying out Fourier transformation on the two-dimensional frequency domain interference strip containing the spatial carrier along the direction of parallel detection, next obtaining a two-dimensional complex frequency domain interference strip sequentially through the processes of filtration trough a frequency domain filter window, coordinate transformation and the Fourier transformation along a frequency spectrum direction, and finally obtaining a chromatogram of an object to be measured through the Fourier transformation along a light frequency direction. The invention has simple structure and high imaging speed, and the chromatogram of the object to be measured can be obtained by only needing exposure for one time.

Description

technical field [0001] The present invention relates to frequency-domain optical coherence tomography (Fourier-Domain Optical Coherence Tomography, referred to as FD-OCT), in particular to a parallel complex frequency-domain optical coherence tomography method and system based on a spatial carrier. Background technique [0002] Optical coherence tomography (OCT) is an optical tomography technology developed in recent years. Non-invasive imaging has broad application prospects in the fields of biological tissue imaging and medical imaging diagnosis. [0003] Frequency-domain optical coherence tomography (FD-OCT) is a new type of OCT system. It obtains the tomogram of the object by detecting the interference spectrum and inverse Fourier transforming it. Compared with the earlier time-domain optical coherence layer Time-Domain Optical Coherence Tomography (TD-OCT) has the advantages of no need for depth direction scanning, fast imaging speed and high detection sensitivity, and...

Claims

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Application Information

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IPC IPC(8): G01J3/45G01N21/45
CPCG01B9/02091G01B9/02032G01B9/02044
Inventor 黄炳杰步鹏王向朝南楠
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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