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High-speed spectral domain optical coherence tomography imaging system based on Michelson interferometer

A technology of optical coherence tomography and imaging system, which is applied in the field of high-speed spectral domain optical coherence tomography system, and can solve the problem of sensitivity drop

Pending Publication Date: 2021-12-14
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

The above methods are difficult to solve the problem that the sensitivity will decrease rapidly with the increase of imaging depth while effectively improving the imaging speed of SDOCT.

Method used

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  • High-speed spectral domain optical coherence tomography imaging system based on Michelson interferometer
  • High-speed spectral domain optical coherence tomography imaging system based on Michelson interferometer
  • High-speed spectral domain optical coherence tomography imaging system based on Michelson interferometer

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific examples.

[0029] image 3 A schematic diagram of an embodiment of a high-speed spectral-domain optical coherence tomography system based on a Michelson interferometer is given. The imaging system is composed of a broadband light source 1, a three-port fiber circulator 2, a 1x2 fiber coupler 3, a polarization controller 4, a collimator lens 5, a neutral density filter 6, a focusing lens 7, a mirror 8, and a scanning galvanometer 9. Scanning four-dimensional adjustment bracket 10, tested sample 11, precision sliding sample platform 12, transmission type volume phase holographic diffraction grating 13, fiber collimator 14, 1x5 optical switch 15, avalanche photodiode detector array 16, bias voltage Control module 17, signal readout circuit 18 and signal processing and system control module 19 are composed. The low-coherence light emitted by the broadband light source 1 enters through the ...

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Abstract

The invention provides a high-speed spectral domain optical coherence tomography imaging system based on a Michelson interferometer. The system is characterized by comprising a broadband light source 1, a three-port optical fiber circulator 2, a 1*2 optical fiber coupler 3, a polarization controller 4, a collimating lens 5, a neutral density filter 6, a focusing lens 7, a reflecting mirror 8, a scanning galvanometer 9, a four-dimensional adjusting bracket 10, a tested sample 11, a precise sliding sample platform 12, a transmission-type volume phase holographic diffraction grating 13, an optical fiber collimator 14, a 1*N optical switch 15, an avalanche photodiode detector array 16, a bias voltage control module 17, a signal reading circuit 18 and a signal processing and system control module 19. The system can be used for rapid detection and real-time monitoring of material defects in the industrial field, and can be widely applied to the fields of biophoton medical imaging, cultural relic inspection, industrial measurement, material evidence detection and the like.

Description

(1) Technical field [0001] The invention relates to a high-speed spectral domain optical coherence tomography imaging system based on Michelson interferometer. The invention can be used for rapid detection and real-time monitoring of material defects in the industrial field, and belongs to the field of optical imaging technology. (2) Background technology [0002] Optical coherence tomography is a non-contact and non-damaging optical imaging technology based on coherent optics proposed in the 1990s. The optical coherence tomography system is based on low-coherence measurement technology. Its imaging process is similar to ultrasonic imaging. The object to be measured is scanned laterally by the beam, and the backscattering or backreflection echo of the sample is measured using heterodyne detection technology. Through the demodulation and processing of the interference signal, the two-dimensional tomographic or three-dimensional structural image of the sample is reconstructed...

Claims

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Application Information

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IPC IPC(8): G01N21/25A61B5/00
CPCG01N21/255A61B5/0066A61B5/0073
Inventor 邓仕杰张浩徐菊苑立波
Owner GUILIN UNIV OF ELECTRONIC TECH
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