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Survey & Review
Research Progress on Materials and Devices of HgCdTe p-on-n Double Layer Heterojunction Grown by VLPE
WANG Wenjin, KONG Jincheng, QI Wenbin, ZHANG Yang, SONG Linwei, WU Jun, ZHAO Wen, YU Jianyun, QIN Gang
2024, 46(3): 233-245.  
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This paper compares four different fabrication methods for mercury cadmium telluride (HgCdTe) p-on-n devices. Among these methods, vertical liquid-phase epitaxy (VLPE) stands out because of its unique advantages, particularly the high activation rate of in situ arsenic (As) dopants. VLPE is an essential approach for producing high-performance p-on-n double heterojunction devices. This paper reviews the research progress, both domestically and internationally, covering material growth, device processes, and performance. The discrepancies between domestic and foreign research are discussed, and the key challenges and technical bottlenecks hindering VLPE technology development are identified. Several solutions have been proposed to solve this problem. This study provides insights into the future trends of VLPE technology for p-on-n heterojunction devices, which hold significant promise in semiconductor devices.
Research Progress in the Design and Application of Shortwave Infrared Imaging Systems
ZHANG Yi, HU Jianchuan, ZHU Youpan, SUN Aiping, CHEN Jie
2024, 46(3): 246-255.  
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Shortwave infrared imaging is a popular topic worldwide. By receiving shortwave infrared radiation for detection and imaging, more information about the target objects can be obtained, compensating for the shortage of visible light imaging to achieve full-band imaging. Based on the optical characteristics, imaging principle, and optical system structure design of shortwave infrared optical imaging, this study compares the advantages and disadvantages of shortwave infrared imaging with visible light and medium-long wave infrared imaging. It briefly introduces the characteristics of indium gallium as a detector in shortwave infrared imaging systems, its development status at home and abroad, and the application of shortwave infrared imaging in different fields. Finally, future developments of shortwave infrared imaging are discussed.
System & Design
Optimal Design of Wide Angle Diffractive Optical Element
YANG Liangliang, LIU Chenglin, ZHAO Yongbing, SHEN Fahua, ZHAO Qi, LIU Jianli
2024, 46(3): 256-260.  
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The influence of the incident angle on the diffraction efficiency and microstructure height of the diffractive optical element (DOE) was analyzed to further study the influence of the incident angle and period width on the polychromatic integral diffraction efficiency (PIDE). Based on the extended scalar diffraction theory (ESDT), a mathematical model of the relationship among the microstructure height, incident angle, and period width of the DOE was established. An optimal design method for structural parameters, such as the design wavelength and microstructure height, was proposed based on maximizing the comprehensive PIDE (CPIDE) within a certain range of incident angles. A DOE operating within the infrared waveband was considered as an example. The results indicate that when the relative period width is 20 and the incidence angle range is 0° to 40°, the CPIDE of the DOE is 94.15%, and the microstructure height is 1.3396 μm. This design method can realize the optimal design of a wide-angle DOE.
Materials & Devices
Study on Absorption Characteristics of VOx Uncooled Detectors
YANG Jun, YANG Chunli, YUAN Jun, YIN Shudong, LI Huaying, BAI Lanyan, MA Min
2024, 46(3): 261-268.  
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As the pixel size of the vanadium oxide (VOx) uncooled infrared focal plane decreased, the absorption area of the detector exhibited a sharp quadratic decrease in the edge length. Improving the absorption efficiency of the VOx uncooled infrared focal plane arrays has become a crucial research topic. In this study, a comprehensive and systematic simulation of the factors affecting the optical absorption of single-layer and double-layer VOx uncooled detectors was conducted from the aspects of material and structure, in terms of the absorption characteristics of single-layer material, different absorption structures, height of the cavity, and thickness of the film system. A systematic approach to improve the absorption of VOx uncooled detectors is provided by quantitatively comparing the factors with the simulation results, which have certain reference significance for the design and research of VOx uncooled detectors.
Image Processing and Simulation
Infrared and Visible Binocular Registration Algorithm Based on Region Search Under Geometric Constraints
WANG Hesong, ZHANG Can, CAI Zhao, HUANG Jun, FAN Fan
2024, 46(3): 269-279.  
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For the registration task of infrared and visible binocular cameras with fixed relative positions, existing algorithms do not consider the prior fixed relative positions of the two cameras, resulting in problems, such as low registration accuracy, large differences in geometric positioning, and poor applicability. An infrared and visible binocular image registration method based on region search under geometric constraints. First, stereo correction was performed on the infrared and visible images using the calibration information of the infrared and visible binocular cameras, such that they were at the same height. Second, infrared and visible edge maps were obtained using phase congruency and feature points were extracted from the infrared edge map. Finally, a two-stage feature point search method is proposed to search for feature points with the same name in the local area of the visible edge map based on the infrared feature points. In the first stage, normalized cross-correlation (NCC) was used as a similarity metric to calculate the overall horizontal offset of the two edge maps, and the initial positions of feature points with the same name were predicted. In the second stage, a multiscale-weighted NCC was proposed as a similarity metric to accurately search for feature points with the same name around the initial location of feature points of the same name. Then, experiments were performed on the constructed real-environment dataset. The experimental results show that compared with other comparison methods, the number and accuracy of matching points and registration results in subjective vision are better.
Structural Similarity Fusion of Infrared and Visible Image in the M-SWF Domain
LI Wei, TIAN Shishun, LIU Guangli, ZOU Wenbin
2024, 46(3): 280-287.  
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This study introduces a multiscale sliding window filter (M-SWF) image fusion method to address issues with traditional filter banks in infrared and visible image fusion. First, a multiscale image decomposition method based on SWF is proposed to extract the structural detail layers and base layers of the source image. Second, the L1 norm fusion rule (L1-Fusion, L1F) is used to integrate the structural detail layers, which can extract the structure of the image. Then, to highlight the salient objects, energy attribute fusion (EAF), which is a rule for fusing image energy contributions, is used to integrate the base layers, and the fusion results are obtained by stacking the integrated multiscale structure detail layers and base layers. The energy contribution coefficient was analyzed, and a suitable energy contribution coefficient was obtained for the fusion of infrared and visible images in the M-SWF domain from subjective and objective perspectives. Compared with other fusion methods, the M-SWF not only improves the ability to extract the structural information of the source image but also improves the poor fusion effect and effectively highlights salient targets by integrating the energy attributes of the image.
Fusion Method for Polarization Direction Image Based on Double-branch Antagonism Network
FENG Rui, YUAN Hongwu, ZHOU Yuye, WANG Feng
2024, 46(3): 288-294.  
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To improve the quality of the fused image, the study presents a double-branch antagonism network (DANet) for the polarization direction images. The network includes three main modules: feature extraction, fusion, and transformation. First, the feature extraction module incorporates low and high-frequency branches, and the polarization direction images of 0°, 45°, 90°, and 135° are concatenated and imported to the low-frequency branch to extract energy features. Two sets of polarization antagonism images (0°, 90°, 45°, and 135°) are subtracted and entered into the high-frequency branch to extract detailed features and energy. Detailed features are fused to feature maps. Finally, the feature maps were transformed into fused images. Experiment results show that the fusion images obtained by DANet make obvious progress in visual effects and evaluation metrics, compared with the composite intensity image I, polarization antagonistic image Sd, Sdd, Sh, and Sv, the average gradient, information entropy, spatial frequency, and mean gray value of the image are increased by at least 22.16%, 9.23%, 23.44% and 38.71%, respectively.
EnFCM Clustering Segmentation Method for Infrared Image of Electrical Equipments Based on Fusion Reconstruction
LIU Peijin, ZHANG Xiangrui, WEI Ping
2024, 46(3): 295-304.  
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Infrared image segmentation plays a pivotal role in diagnosing faults in electrical equipment using infrared imagery. However, uneven heat dissipation, lower contrast, and interference from multiple sources of noise in electrical equipment can lead to over-segmentation of the target region, seriously affecting segmentation accuracy. In this study, we propose an Enhanced Fuzzy C-Means (EnFCM) clustering method based on fusion reconstruction for infrared image segmentation of electrical equipment. First, the gradient image was subjected to an adaptive morphological reconstruction operation to ensure the segmentation ability of the algorithm on noisy images; second, the image was tested for saliency, and the reconstructed image was obtained by fusing the saliency map with the gradient map to highlight the features of the fault site and avoid over-segmentation; then, watershed segmentation was performed on the reconstructed image to obtain the super-pixel image; finally, the histogram clustering of the super-pixel image was obtained by segmentation. The experimental results on the infrared image of electrical equipment show that the algorithm in this paper can accurately segment the fault area on it, obtain its location and contour, and effectively improve the phenomenon of over-segmentation and in the comparison of the selected intersection and concatenation ratio and DICE coefficient indexes, this paper's method improves 81% and 79% on average compared to selected FRFCM, FCM, SFFCM, FCM_SICM, RSSFCA, and AFCF; meanwhile, it is extremely robust to noise, and in the comparison of selected segmentation accuracy indexes, this paper's method achieves segmentation results that are on average 73% superior compared to selected FRFCM, FCM, SFFCM, FCM_SICM, RSSFCA, and AFCF, thus, superior segmentation results were achieved.
Infrared Dim Target Detection Based on Sparse Enhanced Reweighting and Mask Patch-tensor
SUN Shangqi, ZHANG Baohua, LI Yongxiang, LYU Xiaoqi, GU Yu, LI Jianjun
2024, 46(3): 305-313.  
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The high heterogeneity of complex backgrounds destroys the low rank of a scene, and it is difficult for existing algorithms to use low-rank sparse recovery methods to separate dim targets from the background. To resolve this problem, this study transforms the dim target detection problem into a convex optimization function-solving problem for tensor models. It proposes a detection model based on sparsely enhanced reweighting and mask patch tensors. First, the stacked mask patch image was expanded into a tensor space, and a mask patch-tensor model was constructed to filter the candidate targets. Thus, a sparse enhanced reweighting model was constructed using structural tensors to suppress background clutter, and the limitation of setting the weighting parameters can be overcome by solving convex optimization functions. The experiments show that the proposed algorithm outperforms recent representative algorithms regarding the background suppression factor and signal-to-noise ratio gain, demonstrating its effectiveness.
Infrared and Visible Image Fusion Based on Information Bottleneck Siamese Autoencoder Network
MA Luyao, LUO Xiaoqing, ZHANG Zhancheng
2024, 46(3): 314-324.  
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Infrared and visible image fusion methods have problems such as insufficient information extraction, feature decoupling, and low interpretability. In order to fully extract and fuse the effective information of the source image, this paper proposes an infrared and visible image fusion method based on information bottleneck siamese autoencoder network (DIBF: Double Information Bottleneck Fusion). This method realizes the disentanglement of complementary features and redundant features by constructing an information bottleneck module on the twin branch. The expression process of complementary information corresponds to the feature fitting process of the first half of the information bottleneck. The compression process of redundant features corresponds to the feature compression process in the second half of the information bottleneck. This method cleverly expresses information extraction and fusion in image fusion as an information bottleneck trade-off problem, and achieves fusion by finding the optimal expression of information. In the information bottleneck module, the network obtains the information weight map of the feature through training, and uses the mean feature to compress the redundant features according to the information weight map. This method promotes the expression of complementary information through the loss function, and the two parts of compression and expression are balanced and optimized simultaneously. In this process, redundant information and complementary information are also decoupled. In the fusion stage, the information weight map is applied in the fusion rules, which improves the information richness of the fused images. Through subjective and objective experiments on the standard TNO dataset, compared with traditional and recent fusion methods, the results show that the method in this paper can effectively fuse useful information in infrared and visible images, and achieved good results on both visual perception and quantitative indicators.
Infrared Thermal Imaging Smoke Detection Based on Motion and Fuzzy Features
LI Xianjing, HAO Zhenghui
2024, 46(3): 325-331.  
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The production process of coking enterprises generates abundant smoke. Their discharge and leakage can pollute the natural environment, endangering the safety of life and production. Considering the low contrast and poor texture of thermal imaging videos, this study detected smoke with motion and fuzzy characteristics. The noise degree of each frame image can be calculated to replace the fixed threshold of the Vibe detection algorithm so that the moving target area can be completely detected. First, the image was divided into block area images; then, the fuzzy-to-noise ratio in this area was extracted by combining the motion area, the features calculated when the fast fourier transform (FFT) was used to calculate the ambiguity were trained to generate a smoke classifier, and finally, the experimental video detection, with an average accuracy rate of 94.53%. The results show that the proposed algorithm is accurate, operates in real-time for smoke detection in infrared thermal imaging videos of coking enterprises, and has good anti-interference ability.
Infrared Image Fusion Enhancement Algorithm Based on Improved Wavelet Threshold Function and Full-Scale Retinex
TONG Yaonan, YANG Haitao, CAO Zhiqi, CUI Jianshan, LIU Zhi
2024, 46(3): 332-341.  
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This paper proposes an infrared image fusion enhancement algorithm based on an improved wavelet threshold function and full-scale Retinex to address the problems of low signal-to-noise ratio, fuzzy detail, and poor clarity in existing infrared image enhancement algorithms. First, to overcome the degradation of infrared images caused by fixed-scale parameters and light scattering, a full-scale map of Retinex-scale parameters was obtained using atmospheric transmittance to improve image clarity. The input image and processed image with full-scale Retinex were used as the first and second inputs of the algorithm, respectively. Second, an improved wavelet threshold function was designed to solve the problems of artifacts and detail loss in the image-denoising process of the traditional wavelet threshold function. The threshold function introduces a scaling factor that can be adjusted adaptively according to the number of layers after calculating the wavelet coefficient of the high-frequency subgraph of each layer. An adjustment factor was introduced and combined with an exponential function to suppress the high-frequency subgraph noise and preserve detailed information. The high- and low-frequency subgraphs of the above two inputs were then fused using wavelet image fusion to improve the texture details of the output images. The simulation results demonstrate that the proposed algorithm outperforms other comparison algorithms regarding noise reduction and detail highlighting capabilities, enhancing the visual quality of infrared images for the human eye. Finally, this algorithm was applied to enhance infrared images collected by an infrared imaging module, and the experimental results showed that the proposed method is practical.
Low-Light-Level
Dark Current of Aluminum Oxide Passivation Film BCMOS Sensor Increased by Low Energy Electron Bombardment
YAN Lei, SHI Feng, CHENG Hongchang, JIAO Gangcheng, YANG Ye, XIAO Chao, FAN Haibo, ZHEN Zhou, DONG Haichen, HE Huiyang
2024, 46(3): 342-346.  
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This study designed a buried channel metal-oxide-semiconductor (BCMOS) image sensor experiment to address increased dark current caused by low-energy electron bombardment (300 eV to 1500 eV) on the alumina passivation layer. For a CMOS image sensor with a 10 nm alumina passivation layer, an increase in the dark current rate is obvious when the bombardment energy is greater than 600 eV. When the bombardment electron energy does not exceed 1.5 keV, the dark current has a maximum value of about 12000 e-/pixel/s. Finally, after electron bombardment, the dark current of the CMOS image sensor decreased exponentially when the sensor was placed in an electronic drying cabinet. The main reason for the above phenomenon is the increased defect states at the interface between alumina passivation layer and silicon caused by incident electrons.
Nondestructive Testing
Defect Detection of Eddy Current Thermal Imaging of Workpiece Based on Deep Learning and Domain Adaptation
ZHANG Yi, FAN Yugang
2024, 46(3): 347-353.  
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When operating mechanical equipment, the number of fault samples marked is small, which leads to low accuracy of the fault diagnosis of the established model. Therefore, this study proposes a defect detection method for eddy current thermal imaging of a workpiece that combines depth learning and domain adaptation. First, the attention mechanism is introduced into the deep residual network ResNet50 to enhance the feature extraction capability of the model. Then, the source and target domain data are sent into the improved ResNet50 network to extract the depth features. The local maximum mean difference is introduced into the full connection layer of the network to reduce the distribution difference between the two domain features to achieve the distribution alignment of related sub-domains. Finally, workpiece metal material defects were detected in the Softmax classifier of the network. The experiment was conducted on the open magnetic tile dataset and eddy current infrared image dataset of the metal plate collected during the experiment. The results show that the method proposed in this paper is highly accurate in detecting and recognizing crack defects in eddy current infrared images. The advantages of the method in this study were verified by visualizing the analysis results using the t-distribution random neighbor embedding method.
Ir Applications
Research on Infrared Effective Detection Distance for Predicting Spontaneous Combustion of Goaf Residual Coal Based on Non-contact Mode
WANG Xiaoqiang, MI Wansheng, YANG Yongchen
2024, 46(3): 354-361.  
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The spontaneous combustion of residual coal in a goaf is a major cause of underground fire accidents in coal mines. Owing to the actual situation of underground goafs, existing detection methods cannot directly determine the true situation of residual coal thermal storage and spontaneous combustion. This study utilized the non-contact temperature measurement characteristics of the infrared thermal imager, and through the analysis of temperature measurement principles, experimental system design, and construction methods, conducts an experiment to measure the effective detection distance of the FOTRIC348 infrared thermal imager close to the real environment of the underground goaf, and verifies it in underground engineering. The results show that the effective detection distances of the FOTRIC348 in the regional, line, and point temperature measurement modes were 8 m to 12 m, 10 m to 13 m, and 9 m to 13 m, respectively. The effective detection distance of FOTRIC348 during underground testing was 10 m to 12 m. Based on the intersection of the above detection distances, the effective detection distance of the FOTRIC348 infrared thermal imager for determining the thermal storage and spontaneous combustion stage of residual coal in the goaf of the two parallel grooves of the working face is 10 m to 12 m. Determining this value can provide a targeted decision-making basis for implementing prevention and control measures for spontaneous coal combustion in the goaf.
Present State and Perspectives of Small Infrared Targets Detection Technology
HOU Wang, SUN Xiao-liang, SHANG Yang, YU Qi-feng
2015, 37(1): 1-10.  
[Abstract](728) [PDF 2162KB](147)
摘要:
在一些关键的军事和民用红外成像应用领域,待突破的技术瓶颈往往都集中在红外弱小目标检测技术上.简介了红外弱小目标检测的含义和在军事、民用方面的意义,重点综述了目前红外弱小目标检测的各类典型算法原理和特点,最后对红外弱小目标检测技术的研究和发展趋势进行了预测.
Research Development of Infrared Stealth Materials
SHEN Yulian, LI Chunhai, GUO Shaoyun, CHEN Rong
2021, 43(4): 312-323.  
[Abstract](1104) [FullText HTML](591) [PDF 1128KB](409)
摘要:
随着红外探测技术的迅速发展,如何提高军事目标的红外隐身能力成为一个亟待解决的难题,研究红外隐身材料有着十分重要的意义。本文简要分析了红外隐身材料的隐身机理,综述了低红外发射率材料、控温材料、光子晶体以及智能红外隐身材料等4类红外隐身材料近年来的研究现状,并展望了红外隐身材料未来的发展趋势。
Uncooled Infrared FPA--A Review and Forecast
FENG Tao, JIN Wei-qi, SI Jun-jie
2015, (3): 177-184.  
[Abstract](1018) [PDF 1085KB](107)
摘要:
非制冷红外焦平面探测器是热成像系统的核心部件。介绍了非制冷红外焦平面探测器的工作原理及微测辐射热计、读出电路、真空封装三大技术模块,分析了影响其性能的关键参数。与微测辐射热计设计相关的重要参数包括低的热导、高的红外吸收率、合适的热敏材料等;读出电路的传统功能是实现信号的转换读出,近年来也逐渐加入了信号补偿的功能;真空封装技术包括了金属管壳封装、陶瓷管壳封装、晶圆级封装和像元级封装。列举了国内外主要厂商的非制冷红外焦平面探测器的技术指标及近年来的最新技术进展,总结了非制冷红外焦平面探测器的技术发展趋势。
Research Review of 3D Cameras Based on Time-of-Flight Method
WEI Jiali, QU Huidong, WANG Yongxian, ZHU Junqing, GUAN Yingjun
2021, 43(1): 60-67.  
[Abstract](681) [FullText HTML](189) [PDF 549KB](151)
摘要:
基于飞行时间法(Time-of-Flight,TOF)的3D相机是一种体积小、误差小、抗干扰能力强、可直接输出深度信息的新型立体成像设备。目前,该类相机已成为测量成像领域的研究热点。本文首先介绍了TOF相机的发展历程及测量原理;随后对TOF相机测量误差来源及类型进行分析;接着将TOF技术与其他主流的三维成像技术进行对比分析;最后对TOF相机的应用与发展趋势进行了阐述。
Infrared Thermography NDT and Its Development
ZHENG Kai, JIANG Haijun, CHEN Li
2018, 40(5): 401-411.  
[Abstract](356) [PDF 1575KB](56)
摘要:
红外热波成像是近年来发展较快的一种新型无损检测技术,它是一门跨学科、跨应用领域的通用型实用技术,其三大核心技术包括热激励、红外图像采集及红外图像处理.本文对热激励技术中的闪光灯、激光、卤素灯、红外灯、超声、电磁等几种主要热激励方法的特点及研究现状进行了介绍与对比,分析了采集技术中的制冷与非制冷热像仪各自特点,并对红外图像处理技术中的降噪、增强、序列热图处理及缺陷提取等四大研究方向进行了总结,介绍了相应发展状况和进展.最后总结了该技术的发展趋势.
Research on Influence Factors for Measuring and Method of Correction in Infrared Thermometer
LIAO Panpan, ZHANG Jiamin
2017, 39(2): 173-177.  
[Abstract](401) [PDF 1228KB](78)
摘要:
为了减少红外测温仪的测量误差,提高红外测温仪的测温精度,分析了距离、发射率和外界环境温度等因素对红外测温仪测温的影响;建立了红外测温实验系统采集测温数据,并对采集到的实验数据进行了分析验证,通过分析验证可得距离因素对红外辐射测温精度有较大的影响,并且存在一定的关系,从而为提高红外测温精度的提供了依据;设计了一套提高红外测温仪测量精度的系统,该系统能够测出被测物与红外测温仪之间的距离,根据测出的结果得到距离补偿公式,然后依据公式得出温度的距离补偿,从而得到物体的实际温度.最后分析可得,红外测温仪的测量精度能够大幅提高.
Infrared Image Detail Enhancement Algorithm Based on Hierarchical Processing by Guided Image Filter
GE Peng, YANG Bo, HAN Qinglin, LIU Peng, CHEN Shugang, HU Douming, ZHANG Qiaoyan
2018, 40(12): 1161-1169.  
[Abstract](280) [PDF 2514KB](54)
摘要:
为了解决高动态红外图像在常规显示设备上显示时容易出现图像整体对比度低、弱小目标细节模糊等问题,提出了一种基于引导滤波图像分层的红外图像细节增强算法,并从算法理论分析和仿真结果两方面验证了引导滤波具有更好的边缘保持能力,能有效避免增强后出现"伪边缘"的缺陷.另外,针对原始全局的引导滤波算法对整幅图像各个区域使用相同的规整化因子,容易产生"光晕"现象的缺陷,本文在局部方差加权引导滤波算法的思想上,提出了基于LoG边缘算子的加权引导滤波算法.实验结果表明本文算法具有良好的细节增强效果,特别是对图像中的弱小目标;另外,相比目前应用广泛的双边滤波算法,本文算法运行时间要快得多,具有实时处理的应用前景.
Read Out Integrated Circuit for Third-Generation Infrared Focal Plane Detector
BAI Pi-ji, YAO Li-bin
2015, (2): 89-96.  
[Abstract](864) [PDF 738KB](99)
摘要:
对红外探测器不断增长和提高的需求催生了第三代红外焦平面探测器技术。根据第三代红外探测器的概念,像素达到百万级,热灵敏度NETD达到1 mK量级是第三代制冷型高性能红外焦平面探测器的基本特征。计算结果表明读出电路需要达到1000 Me-以上的电荷处理能力和100 dB左右的动态范围(Dynamic Range)才能满足上述第三代红外焦平面探测器需求。提出在像素内进行数字积分技术,以期突破传统模拟读出电路的电荷存储量和动态范围瓶颈限制,使高空间分辨率、高温度分辨率及高帧频的第三代高性能制冷型红外焦平面探测器得到实现。
Developments of High Performance Short-wave Infrared InGaAs Focal Plane Detectors
SHAO Xiumei, GONG Haimei, LI Xue, FANG Jiaxiong, TANG Hengjing, LI Tao, HUANG Songlei, HUANG Zhangchen
2016, 38(8): 629-635.  
[Abstract](494) [PDF 900KB](60)
摘要:
中科院上海技物所近十年来开展了高性能短波红外 InGaAs 焦平面探测器的研究。0.9~1.7?m近红外 InGaAs 焦平面探测器已实现了256×1、512×1、1024×1等多种线列规格,以及320×256、640×512、4000×128等面阵,室温暗电流密度<5 nA/cm2,室温峰值探测率优于5×1012 cm?Hz1/2/W。同时,开展了向可见波段拓展的320×256焦平面探测器研究,光谱范围0.5~1.7?m,在0.8?m 的量子效率约20%,在1.0?m 的量子效率约45%。针对高光谱应用需求,上海技物所开展了1.0~2.5?m 短波红外 InGaAs 探测器研究,暗电流密度小于10 nA/cm2@200 K,形成了512×256、1024×128等多规格探测器,峰值量子效率高于75%,峰值探测率优于5×1011 cm?Hz1/2/W。
Infrared Image Denoising Method Based on Improved Non-local Means Filter
GUO Chenlong, ZHAO Xuyang, ZHENG Haiyan, LIANG Xining
2018, 40(7): 638-641.  
[Abstract](155) [PDF 982KB](23)
摘要:
提出了一种基于梯度信息的结构相似性算法改进的红外图像非局部均值滤波方法.传统的非局部均值滤波算法采用欧氏距离度量图像块之间的相似性,因而不能够很好地衡量图像细节和边缘信息,导致滤波后图像模糊失真.针对此问题,采用结构相似性度量(structural similarity,SSIM)算法对欧氏距离进行加权改进,针对普通的SSIM边缘信息评价能力的不足,提出了带有梯度信息的GSSIM算法,实验结果表明本方法在保持非局部均值(Non-Local Means,NLM)滤波算法去噪能力的同时还能够较好地保持图像的边缘和细节信息.
Research Progress and Application of Polarization Imaging Technology
ZHOU Qiangguo, HUANG Zhiming, ZHOU Wei
2021, 43(9): 817-828.  
[Abstract](1487) [FullText HTML](2386) [PDF 1293KB](2386)
Abstract:
The advantage of polarization imaging technology is that it expands the amount of information from three degrees of freedom, namely light intensity, spectrum, and space, to seven degrees of freedom, including light intensity, spectrum, space, degree of polarization, polarization azimuth, polarization ellipticity, and direction of rotation. This richness of observational information is conducive to improving the accuracy of research target detection. This article first introduces the research progress of polarization imaging technology at home and abroad in recent decades, then introduces the typical applications of polarization technology in military and civilian fields, and finally provides reasonable suggestions on the problems of polarization imaging technology in our country.
Research Development of Infrared Stealth Materials
SHEN Yulian, LI Chunhai, GUO Shaoyun, CHEN Rong
2021, 43(4): 312-323.  
[Abstract](1104) [FullText HTML](591) [PDF 1128KB](591)
Abstract:
With the rapid development of infrared detection technology, the improvement of the infrared stealth capability of military targets has become an urgent problem to be solved, so it is of great significance to study infrared stealth materials. This paper briefly analyzes the stealth mechanism of infrared stealth materials, summarizes the research status of four types of infrared stealth materials in recent years, such as low infrared emissivity materials, temperature control materials, photonic crystals, and intelligent infrared stealth materials, and forecasts the future development trend of infrared stealth materials.

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Monthly, Established 1979

Competent Authorities:China North Industries Group Corporation

Sponsored by:Kunming Institute of Physics
China Ordnance Society, Speciality

ISSN:1001-8891

CN:53-1054/TN

Postal distribution code:64-26

Editorial Office:No.31 Jiao Chang Dong Road, Kunming, 650223, China

Tel:0871-65105248

E-mail:irtek@china.com

Infrared technology is one of the earliest photoelectronic journals in China.Infrared Technology is published by Science Press, and it is a single monthly technical journal.

Infrared Technology is a professional and academic journal based on scientific research, which comprehensively reflects the research progress of infrared technology at home and abroad and its application in national defense, industry, agriculture and national economy.After years of efforts, INFRARED Technology has become the core journal of Chinese, The core journal of Chinese science and technology, and the source journal of Chinese Science citation database.


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