Metal Fatigue Damage Assessment Based on Polarized Thermography

Fangbin, 汪方斌 Wang; Fan, 孙凡 Sun; Darong, 朱达荣 Zhu; Liu, Tao; Xue, 王雪 Wang; Feng, 王峰 Wang

doi:10.3788/aos202040.1412002

Cited by 5 publications

(4 citation statements)

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“…2022, 12, x FOR PEER REVIEW 2 of 13 polarization imaging is a new kind of photoelectric detection system, the method of using polarization imaging measurement objective reflection of the degree of polarization and polarization angle information, can effectively make up for the inadequacy of traditional imaging, solve traditional photometry is difficult to solve the problem in target recognition, and obtain the result of the high precision, and on the basis of traditional strength imaging increased the polarization information dimension, The polarization information of each point in the image can be obtained as well as the distribution of light intensity in two-dimensional space. At present, polarization imaging technology has shown potential application prospects in biomedicine [1,2], modern military [3,4], industrial detection [5][6][7], descattering imaging [8][9][10][11], navigation [12] and other fields. Polarization imaging methods mainly include Stokes vector imaging and Muller matrix imaging, and Stokes vector can be expressed as 4 × 1 column matrix or 1 × 4 row matrix, which is more convenient in describing fully polarized light, natural light and partially polarized light.…”

Section: The Principle Of Stokes Vector Measurementmentioning

confidence: 99%

Principle and Implementation of Stokes Vector Polarization Imaging Technology

Wang

Sun³

et al. 2022

Applied Sciences

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Compared with traditional imaging methods, polarization imaging has its unique advantages in many directions and has great development prospects. It is one of the hot spots of research and development at home and abroad. Based on the polarization imaging principle of Stokes vector, the realization methods of non-simultaneous polarization imaging and simultaneous polarization imaging are introduced, respectively according to the different polarization modulation methods of Stokes vector acquisition. Non-simultaneous polarization imaging is mainly introduced in two ways: rotary polarization imaging, electrically controlled polarization imaging, and the simultaneous polarization imaging is mainly introduced in three ways: divided amplitude polarization imaging, divided aperture polarization imaging, and divided focal plane polarization imaging. In this paper, the principle and realization of polarization imaging based on Stokes vector are introduced to boost the application of polarization imaging and promote the research and development of polarization imaging technology.

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Section: The Principle Of Stokes Vector Measurementmentioning

confidence: 99%

Principle and Implementation of Stokes Vector Polarization Imaging Technology

Wang

Sun³

et al. 2022

Applied Sciences

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“…Polarization imaging is a new optoelectronic detection system that can obtain one more dimension of scene information compared with traditional imaging, and it has important applications in industrial inspection, biomedicine, remote sensing of the earth, aviation, and marine fields [1][2][3][4][5][6][7]. In general, the polarization camera concepts are divided into three categories: the division of amplitude, the division of the aperture [8], and the division of the focal plane [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Full Stokes Mid-Wavelength Infrared Polarization Photodetector Based on the Chiral Dielectric Metasurface

Cheng,

Zou,

Song

2024

Photonics

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Conventional imaging techniques can only record the intensity of light while polarization imaging can record the polarization of light, thus obtaining a higher dimension of image information. We use the COMSOL software to numerically propose a circular polarization photodetector composed of the dislocated 2-hole Si chiral metasurfaces controlling the circular polarization lights and the HgCdTe (MCT) photodetector chip to detect the intensity of light signals. The chiral metasurfaces can be equated to a significant radiation source of the Z-type current density under the right circularly polarized incidence conditions, which explains the large circular dichroism (CD) of absorption of 95% in chiral photodetectors. In addition, the linear dichroism (LD) of the linear polarization pixel is 0.62, and the extinction ratio (ER) is 21 dB. The full Stokes pixel using the six-image-element technique can almost measure arbitrary polarization information of light at 4 μm operation wavelength. Our results highlight the potential of circular dichroic metasurfaces as photonic manipulation platforms for miniaturized polarization detectors.

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“…An imaging polarimeter captures the two-dimensional spatial polarization information of the target, which is widely used in biomedicine [28,29], industrial detection [30][31][32], de-scattering imaging [33][34][35][36], and other fields due to its ability in describing the roughness and contour of targets. The channel-modulated imaging spectropolarimeter (CMIS) [37][38][39] developed on the basis of FTIS can simultaneously obtain the spectra and full polarization information of the target, which has attracted significant attention for its compact structure and high stability.…”

Section: Introductionmentioning

confidence: 99%

Hyperspectral Channel-Modulated Static Birefringent Fourier Transform Imaging Spectropolarimeter with Zoomable Spectral Resolution

Zhang,

Zhu,

Huang

et al. 2023

Photonics

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A novel channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS) is introduced, which is based on a double Wollaston prism (DWP). With an adjustable air gap (AG), the spectral resolution can be adjusted by changing the AG. The CSBFTIS combines the channel-modulated imaging spectropolarimeter and the slit-free static birefringent Fourier transform imaging spectrometer technology with adjustable spectral resolution. The device is compact and robust, with a wide spectral range and a large luminous flux. Compared with various previous spectropolarimeters, it can greatly reduce the size of the spectral image data to adapt to different application requirements. A prototype is built, and simulation and experiments are carried out, and the results prove the effectiveness of the method.

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Metal Fatigue Damage Assessment Based on Polarized Thermography

Cited by 5 publications

References 0 publications

Principle and Implementation of Stokes Vector Polarization Imaging Technology

Principle and Implementation of Stokes Vector Polarization Imaging Technology

Full Stokes Mid-Wavelength Infrared Polarization Photodetector Based on the Chiral Dielectric Metasurface

Hyperspectral Channel-Modulated Static Birefringent Fourier Transform Imaging Spectropolarimeter with Zoomable Spectral Resolution

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