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Swept source based common-channel optical coherence tomography system and method

A technology of optical coherence tomography and frequency sweep light source, applied in the fields of medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as increasing the difficulty of implementation, and achieve the effect of easy miniaturization, convenient use and easy integration

Active Publication Date: 2014-09-10
无锡微文半导体科技有限公司
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Problems solved by technology

Although the imaging quality of this application is not affected by the environment and the speed is fast, it still needs to make an additional reflective surface as a reference surface, and requires complex devices such as an electronic control platform, which increases the difficulty of implementation

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  • Swept source based common-channel optical coherence tomography system and method
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  • Swept source based common-channel optical coherence tomography system and method

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0025] Such as figure 1As shown, a common path optical coherence tomography system based on a swept frequency light source includes a broadband swept frequency light source 1, a three-terminal circulator 2, a probe 3, an interference system and a control processing system, and the probe 3 includes a Green lens 4 and MEMS Reflector 6; the laser light emitted by the broadband sweeping light source 1 enters the probe 3 through the three-terminal circulator 2, and the Green lens 4 in the probe 3 converges a part of the laser light to form a converged laser, which is reflected by the MEMS reflector 6 and then exits the probe 3 When it is irradiated on the sample, the control processing system energizes and controls the MEMS mirror 6 so that the concentrated laser reflected by the MEMS mirror 6 scans the ...

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Abstract

The invention discloses a swept source based common-channel optical coherence tomography (OCT) system and method. The system comprises a broadband swept source, a three-terminal circulator, a probe, an interference system and a control processing system. The probe comprises a GRIN lens and an MEMS (micro-electromechanical system) mirror. Laser emitted by the broadband swept source enters the probe via the three-terminal circulator, part of the laser is converged via the GRIN lens in the probe, the laser after being reflected from the probe via the MEMS mirror is irradiated onto a sample to perform one-dimensional or two-dimensional scanning on the sample so as to obtain sample information, and the converged laser with the sample information returns to the three-end circulator to form reference light. Sample light and the reference light enter the interference system via the three-terminal circulator to form an interference signal, and the interference signal enters the control processing system to be processed to form a sample image. By the OCT system and method, the reference light is provided directly through the end face of the GRIN lens replacing an independent sample arm, and the structure is simple.

Description

technical field [0001] The invention belongs to the technical field of optical coherence tomography (OCT for short), and in particular relates to a common-path optical coherence tomography system and method based on a frequency-sweeping light source. Background technique [0002] Optical coherence tomography (OCT, Optical Coherence Tomography) is an emerging technology that has emerged in the past ten years. It has high resolution and can perform three-dimensional imaging in real time. It has become an important image in the fields of medicine, industry, and health. imaging technology. At present, OCT is mostly a split-light optical fiber system, that is, the light source is divided into two paths through a splitter, one path enters the reference arm, and the other path enters the sample arm, and the returned light from these two paths finally forms interference information. The arm often needs to be bent or replaced at one time. In these cases, it is necessary to adjust th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00
Inventor 王东琳谢会开
Owner 无锡微文半导体科技有限公司
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