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

A dual-field optical coherence tomography imaging system and material thickness detection method

A technology of optical coherence tomography and scanning imaging, which is applied in the direction of measuring devices, optical devices, instruments, etc.

Active Publication Date: 2021-09-10
SUZHOU UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited imaging depth, OCT is currently only used to measure the thickness of transparent materials

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
  • A dual-field optical coherence tomography imaging system and material thickness detection method
  • A dual-field optical coherence tomography imaging system and material thickness detection method
  • A dual-field optical coherence tomography imaging system and material thickness detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] The PC 1 cooperates with the sample arm in the DSV-OCT system and the attitude adjustment unit of the sample placement platform to perform B-scan and C-scan, and realize data acquisition and processing. The data acquisition card set in the PC 1 uses the external k clock provided by the laser source as the sampling clock to perform analog-to-digital conversion on the signal output by the balanced detector, and the obtained interference spectrum signals are evenly distributed in the wave number space and stored in the Computer memory for subsequent Fourier transform calculations. The data acquisition program is built on the LabVIEW platform, which is used to collect data and control the movement of the electric translation platform to realize B-scan and C-scan. Data processing is mainly to convert the interference signal into a signal in the sample depth domain by performing spectral shaping, Fourier transform and removing fixed pattern noise on the detected interference ...

Embodiment 2

[0095] On the basis of Embodiment 1, the ability of the DSV-OCT system to generate a two-dimensional thickness map. Customize a 1-inch opaque disc engraved with a circular wall (inner diameter: 2mm, outer diameter: 3mm, height: 0.3mm) as a sample. A 4mm square area was scanned with the DSV-OCT system, and the scanned original 3D image is as follows Figure 7 As shown in (a) figure. The overall contours of the two surfaces can be clearly seen from the 3D graphics. Figure 7 The picture in (b) is Figure 7 An example of a cross-sectional image at the dotted rectangular box in (a) panel. Before computing the thickness, mean filtering was used to further reduce noise. Figure 8 Figure (a) plots the contours of the two surfaces, and the material thickness calculated using formula (4) as Figure 8 As shown in (b) figure. There are some slight fluctuations in the thickness, indicating that the surface roughness of the material is not very good.

[0096] In addition, DSV-OCT sy...

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 invention relates to a dual-field optical coherence tomography imaging system and a material thickness detection method. The frequency-sweeping optical coherence tomography imaging system includes a scanning imaging system and a frequency-sweeping light source that provides a light source for the scanning imaging system. The scanning imaging system includes: A sample arm and a reference arm corresponding to the frequency-sweeping light source, the frequency-sweeping light source provides a sampling light source or a reference light source to the sample arm and the reference arm respectively; Attitude adjustment unit; the light returned by the sample arm and the reference arm interferes to form an interference signal, which is detected by the balance photodetector and sent back to the PC. The invention provides a double-side view OCT system, which further extends the OCT technology to the thickness measurement of opaque materials, and improves the accuracy of measuring the thickness of the non-transparent materials.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to the technical field of non-transparent material thickness detection, and in particular to a dual-field optical coherence tomography imaging system and a non-transparent material thickness detection method. Background technique [0002] Optical coherence tomography (Optical Coherence Tomography, OCT) is a low-coherence optical interference imaging technology, which can scan and image optical scattering media such as biological tissues, and the obtained image resolution can reach the micron level. OCT has a new technical method, which has the advantages of non-contact, non-invasive, non-invasive and high resolution. According to its imaging mechanism, this technology is very suitable for imaging and thickness measurement of multilayer structures, therefore, OCT has been widely used in medical diagnosis. So far, OCT has been successfully applied to ophthalmic imaging as ...

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): G01B11/06
CPCG01B11/06G01B11/0675
Inventor 莫建华吴倩
Owner SUZHOU 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