Bo Dong

Bo Dong
GuangDong University of Technology · School of automation

PhD

About

44
Publications
4,570
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164
Citations
Introduction
Bo Dong received his BS and PhD degrees from Guangdong University of Technology in 2012 and 2017, resepctively. His research interests focus on optical measurement technology and instrument, especially optical coherence tomography, optical coherence elastography, digital image/volume correlation, digital gradient sensing, and chromatic confocal displacement sensor. He was elected into the “Emerging Leaders 2021” (IOP Publishing).

Publications

Publications (44)
Article
Full-text available
Phase-sensitive optical coherence elastography (PhS-OCE) is a high-sensitivity method for measuring internal displacement fields of semi-transparent materials. Although the displacement measurement sensitivity of PhS-OCE reaches sub-nanometer level, the dynamic range of the measured displacements is limited to micrometers due to displacement-induce...
Article
Full-text available
Video extensometer assesses mechanical properties of materials by measuring their length changes under different loadings with combined use of video recording and image processing. In this letter, an ultrasensitive video extensometer implemented on a single-camera dual field-of-view (dual-FOV) telecentric imaging system is proposed. The method inte...
Article
Full-text available
The curing process of polymer materials and structures has a crucial influence on their final properties. However, existing methods are only capable of characterizing their time-resolved information. To comprehensively reveal curing behaviors inside polymers, we report a method that combines optical coherence tomography and quantitative phase imagi...
Article
Full-text available
Fluorescent digital image correlation (DIC) has been implemented on monocular and binocular fluorescence microscopes for shape and deformation measurement at microscale and even nanoscale by tracking fluorescent particles. This technique, however, has not been used with regular optical imaging systems for DIC measurements in macroscale so far. In t...
Article
Full-text available
In this letter, a deep-learning-based approach is proposed for estimating the strain field distributions in phase-sensitive optical coherence elastography (PhS-OCE). The method first uses the simulated wrapped phase maps and corresponding phase-gradient maps to train the strain estimation convolution neural network (CNN) and then employs the traine...
Preprint
Wavelength scanning interferometry (WSI) is a promising tomographic imaging technique. However, the depth resolution is fundamentally limited by a narrow wavelength scanning range, which brings challenges to the frequency extraction for depth information. In this work, we proposed a parameter estimation (PE) paradigm via sinewaves separation, which...
Article
Full-text available
Intensity saturation is a challenging problem in structured light 3D shape measurement. Most of the existing methods achieve high dynamic range (HDR) measurement by sacrificing measurement speed, making them limited in high-speed dynamic applications. This letter proposed a generic efficient saturation-induced phase error correction method for HDR...
Article
Full-text available
The non-uniform motion-induced error reduction in dynamic fringe projection profilometry is complex and challenging. Recently, deep learning (DL) has been successfully applied to many complex optical problems with strong nonlinearity and exhibits excellent performance. Inspired by this, a deep learning-based method is developed for non-uniform moti...
Article
Full-text available
Phase-sensitive optical coherence elastography (PhS-OCE) is a novel functional imaging modality capable of mapping strain fields inside semi-transparent materials. In this work, an off-axis PhS-OCE was further developed to measure strain field and Poisson’s ratio simultaneously. Based on the intrinsic equations of continuum mechanics, the relations...
Article
Full-text available
Strain field characterization for evaluating the mechanical properties of polymethyl methacrylate (PMMA) is highly significant. This study establishes a method based on phase-contrast optical coherence tomography for the through-thickness strain field measurement of PMMA sheets, which utilizes two methods of probing light passing through the specim...
Article
Phase measurement profilometry plays an important role in industrial applications. Traditional fringe projection profilometry (FPP) requires a stable reference plane to record the reference phase for the 3D reconstruction, which makes it sensitive to the motion-induced error caused by the reference plane. Thus, it is challenging for the traditional...
Article
Full-text available
We proposed an adaptive incremental method for the cumulative strain estimation in phase-sensitive optical coherence elastography. The method firstly counts the amount of phase noise points by mapping a binary noise map. After the noise threshold value is preset, the interframe interval is adaptively adjusted in terms of the phase noise ratio. Fina...
Article
Full-text available
A method combining phase-contrast technique and spectral-domain optical coherence tomography (OCT) has been recently proposed for visualizing curing behaviors inside polymers (2020 Appl. Phys. Lett. 116 054103). Here, based on the method, a non-contact and highly-sensitive optical sensor is further developed to monitor the photocuring process of li...
Article
Full-text available
Background An advanced two-dimensional digital image correlation (2D-DIC) using active imaging and telecentric imaging has been proposed to overcome the problems of out-of-plane motion and ambient light variation. Objective Here, the technique is further improved by combining built-in coaxial illumination and telecentric fluorescent imaging to prov...
Article
Full-text available
In fringe projection profilometry (FPP), objects with hole discontinuities can lead to shadows and even phase unwrapping morbidity. To solve this problem, we propose an enhanced FPP system by employing the backlighting technique in this paper. This method consists of shadow compensation (SC) and high dynamic range (HDR) imaging; the SC is implement...
Article
Full-text available
Digital gradient sensing (DGS) is a non-contact and full-field optical measurement technique, which assesses mechanical behaviors of transparent materials or specular structures by measuring angular deflections of light rays. However, owing to the poor light-gathering capability of its imaging system, the dynamic performance of DGS is heavily restr...
Article
Full-text available
Optical coherence tomography (OCT) is a low-coherence interferometry based optical technique capable of imaging internal structures of transparent/semitransparent objects with micrometer resolution and millimeter range. It features distinct advantages of non-invasive and fast-imaging, and has been widely applied in biology, medicine, and material s...
Article
We proposed a method to reduce the phase noise in wavelength scanning interferometry (WSI). The method utilizes the two different mechanisms of Fourier transform and the least squares algorithm to produce a synthetic phase map. For validation, the deformation of a fiberglass reinforced resin matrix composite specimen under mechanical loading was me...
Article
Full-text available
A simple and practical full-frame single-camera stereo-digital image correlation (stereo-DIC) technique for three-dimensional (3D) shape, displacement, and deformation measurements is proposed. The technique uses a compact X-cube prism-based color separation device and a color camera to capture images of blue and red colors from different optical p...
Article
Depth-resolved wavelength scanning interferometry (DRWSI) is a tomographic imaging tool that employs phase measurement to visualize micro-displacement inside a sample. It is well known that the depth resolution of DRWSI is restricted by a wavelength scanning range. Recently, a nonlinear least-squares analysis (NLS) algorithm was proposed to overcom...
Article
We propose a novel, flexible and easy-to-implement single-camera microscopic three-dimensional digital image correlation (3D-DIC) technique for accurate full-field shape, motion and deformation measurements at the microscale. The established microscopic 3D-DIC system comprises a single 3CCD color camera, a high magnification zoom lens, and a specia...
Article
Tensile properties of fibers are of high significance for composite materials, thus making their testing methods also highly concerned. In this work, an advanced dual-reflector-assisted video extensometer is established for accurate determination of tensile properties of carbon fiber multifilament. To validate the practicality and effectiveness of...
Conference Paper
Full-text available
Phase-sensitive optical coherence elastography (PhS-OCE) is a highly sensitive method for measuring depth-resolved displacement field distribution inside tissues and semi-transparent materials. In addition to characterizing mechanical properties, we found the method is also effective in identification of defects inside tissues and materials. By map...
Article
A method for measuring the three-dimensional (3D) profile of lens by full-field interferometry was proposed to meet the requirement of high accuracy processing technology. A distribution feedback(DFB)diode laser of calibrated 3D profile measurement system was used to perform the wavenumber-scanning interferometric measurement for the lens. The inte...
Article
Compression is one of the typical parameters measured in material mechanics. In this research, the compression displacement fields on the front and rear surfaces of an epoxy sample are measured by using a tilt depth-resolved wavenumber-scanning Michelson interferometer. The light source is a distributed feedback laser diode, the wavenumber of which...
Article
A dual-channel phase-contrast spectral optical coherence tomography (DPC-SOCT) method is proposed for measuring axial and normal to B-scan off-axial displacements inside weakly scattering translucent materials. By employing a dual-channel observation structure with depth multiplexing, only one shot before and one shot after the object deformation a...
Article
Full-text available
A displacement sensor with nanometer-sensitivity and a submillimeter dynamic range is proposed. It integrates a chromatic confocal system and phase-sensitive spectral optical coherence tomography (PhS-SOCT) into the fiber-based Michelson interferometer and codes interference and confocal signals with spectral multiplexing. A displacement is evaluat...
Article
Full-text available
Digital volume correlation is an image-based technique for internal 3D displacement and strain fields measurement or analysis widely used in the field of experimental mechanics. A widely used correlation function (criterion) of digital volume correlation is Pearson correlation function, which suffers from the problem of the acquired data being cont...
Article
Full-text available
An updated B-scan method is proposed for measuring the evolution of thermal deformation fields in polymers. In order to measure the distributions of out-of-plane deformation and normal strain field, phase-contrast spectral optical coherence tomography (PC-SOCT) was performed with the depth range and resolution of 4.3 mm and 10.7 μm, respectively, a...
Article
Full-text available
To measure the stress and deformation inside resin composites rapidly and dynamically, a B-scan method based on phase contrast spectral optical coherence tomography was employed to measure the out-of-plane displacement field and strain field of the resin composites with voiding defect. A bending experiment and a thermal deformation experiment were...
Article
By using phase-contrast spectral optical coherence tomography(OCT), we have successively measured the out of plane displacement field inside the ferrite/Polyphenylene sulfide(PPS)composite material curved surfaces dynamically. The results show that the out-of-plane-displacement-field inside the curved surfaces and 60 μm away from upper surfaces can...
Article
Full-text available
Based on an optical interference phase-contrast theory in the spectral domain, we propose a B-scan method to measure the out-of-plane displacement inside the glass fiber/polymer composite. In order to quantify its performance, composite members are specially designed, in which the polymer layer, air layer and glass layer represented the polymer bas...
Article
Full-text available
In this article, we provide a method to improve the depth resolution of wide-field depth-resolved wavenumber-scanning interferometry (DRWSI), because its depth resolution is limited by the range of the wavenumber scanning and mode hopping of the light source. An optical wedge is put into the optical path to measure the series of the wavenumber on t...

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Projects

Projects (2)
Project
Applications of digital image correlations
Project
Phase-resolved optical coherence tomography