Method and system for realizing axial super resolution in tomography of optical coherent

An optical coherence tomography and super-resolution technology, used in spectrometry/spectrophotometry/monochromator, optical radiation measurement, medical science, etc. Short-pulse lasers are expensive and have high achromatic requirements, so as to avoid high costs, promote miniaturization and commercialization, and achieve low costs.

Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV
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Problems solved by technology

However, these broadband light source technologies have the following limitations: 1) The achromatic requirements for optical components such as imaging lenses are greatly increased; 2) Ultra-broadband high-efficiency single-mode fiber devices are not easy to obtain; 3) Ultrashort pulse lasers are expensive and inconvenient to operate. Difficulty in miniaturization and commercialization
Therefore, the use of broadband light source technology to improve the axial resolution of OCT is often expensive, the system is complex, and there is a bottleneck in the device, it is difficult to continue to improve on the existing basis

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  • Method and system for realizing axial super resolution in tomography of optical coherent
  • Method and system for realizing axial super resolution in tomography of optical coherent
  • Method and system for realizing axial super resolution in tomography of optical coherent

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0029] figure 1 Shown is a schematic diagram of the sample arm structure for implementing OCT axial super-resolution. In the figure, 1 is a collimating mirror, 2 is a pupil filter, 3 is a detection objective lens, and 4 is a sample. The sample 4 is located near the focal point of the detection objective 3 . The collimating mirror 1, the pupil filter 2 and the detection objective lens 3 are placed coaxially. The effective aperture of the pupil filter 2 is equal to the full aperture of the detection objective 3 and normalized to 1. The edge portion outside the effective aperture of the pupil filter 2 does not participate in imaging due to the limitation of the aperture of the detection objective lens 3 and can be used for fixing the pupil filter 2 .

[0030] Such as figure 1 As shown, the light emitted from one port of the 2×2 fiber coupler is collimated by...

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Abstract

An optical coherent tomography (OCT) method with axial super-resolution and its system are disclosed. A pupil filter is inserted between the collimating lens of OCT specimen arm and the object lens to decrease the width of main lobe of axial response function to less than coherent gate, so increasing its axial resolution.

Description

technical field [0001] The invention relates to optical coherence tomography (OCT) technology and optical super-resolution technology, in particular to a method and system for realizing axial super-resolution of optical coherence tomography by using a pupil filter. Background technique [0002] Optical coherence tomography (OCT) is an emerging optical imaging technology. Compared with traditional clinical imaging methods, it has high resolution, fast imaging speed, no radiation damage, moderate price, and compact structure. It is an important potential tool for basic medical research and clinical diagnostic applications. [0003] Resolution is an important indicator for the development of OCT technology. The axial resolution of OCT is jointly determined by the bandwidth of the light source and the focusing conditions of the probe beam. Under the condition of weak focusing of the probe beam, the width of the main lobe of the corresponding axial response function is much lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00G01N21/45G01J3/00G06F19/00
Inventor 丁志华周琳孟婕
Owner ZHEJIANG UNIV
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