Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sweeping oct digital phase correction method and system based on static area information

A technology of static area and frequency sweep, which is applied in the direction of electrical digital data processing, image data processing, special data processing applications, etc., can solve problems such as increasing system complexity, residual phase noise, and increasing costs, and achieves improved utilization of light intensity High efficiency, real-time imaging, simple system effect

Active Publication Date: 2017-10-13
ZHEJIANG UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardware approach increases system complexity and increases cost
The digital correction method generally uses the signal at a fixed noise position (inherent noise caused by system end surface reflection) to calculate the spectral shift of the interference signal through an iterative or fitting method, but the iterative method has a large amount of calculation and takes a long time. Practical; the problem with the fitting method is low stability and residual phase noise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sweeping oct digital phase correction method and system based on static area information
  • Sweeping oct digital phase correction method and system based on static area information
  • Sweeping oct digital phase correction method and system based on static area information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0023] Such as figure 1 As shown, the present invention includes a frequency-sweeping light source 1, a first fiber coupler 2, a first fiber circulator 3, a first fiber collimator 4, a focusing lens 5, a plane mirror 6, a first polarization controller 7, a first Two-fiber circulator 8, second fiber collimator 9, two-dimensional scanning galvanometer 10, objective lens 11, sample 12, second polarization controller 13, second fiber coupler 14, balance detector 15, acquisition and processing module 16;

[0024] The low-coherence light emitted by the frequency-sweeping light source 1 is split by the first broadband fiber coupler 2, and then enters the reference arm module and the sample arm module respectively, and the light entering the reference arm module passes through the first optical fiber circulator 3 and passes through the light collim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a frequency-sweeping OCT digital phase correction method and system based on static area information. In the existing frequency-sweeping optical coherence tomography technology, the scanning trigger of the frequency-sweeping light source and the sampling clock signal are not synchronized, and the spectrum of the interference signal exists. Random misalignment leads to random jumps of the OCT phase signal. The study found that in the static region of the sample, compared with the phase jump error, the phase noise determined by the system SNR is smaller, while the phase disturbance caused by the environment has the characteristics of slow change in time. The present invention uses the above-mentioned phase characteristics to determine the position of the A-line where the phase jump occurs and the shift amount of the spectrum, and realizes the correction of the phase jump error through the linear relationship between the phase and the imaging depth. This method belongs to pure digital correction, does not increase the complexity of the system, and does not introduce additional phase noise.

Description

technical field [0001] The present invention relates to Swept Source Optical Coherence Tomography (Swept Source Optical Coherence Tomography, SS-OCT) and functional imaging technologies such as Optical Doppler and Microvascular Optical Contrast Imaging, in particular to a Swept OCT digital phase compensation based on static area information Correction methods and systems. technical background [0002] The contrast of traditional OCT imaging mainly comes from the spatial variation of the backscatter coefficient inside the sample, which forms the structural imaging inside the sample. Due to the single contrast, structural OCT is not very disease-specific in clinical diagnosis. In view of this, scholars have carried out a lot of work in exploring the new contrast mechanism of OCT, and formed a series of OCT with expanded functions. Compared with structural imaging, these technologies comprehensively use the intensity and phase information of OCT signals to obtain physiologica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00G06T3/00G06T5/00G06F17/00
Inventor 李鹏丁志华潘聪郭立
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com