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International Journal of Optics最新文献

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Simulation and Optimization of Temperature Effect in Solar Cells CdTe with Back Connection Cu2O Cu2O背接CdTe太阳能电池温度效应的模拟与优化
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-02-23 DOI: 10.1155/2022/1207082
P. Khaledi, Mahdi Behboodnia, M. Karimi
{"title":"Simulation and Optimization of Temperature Effect in Solar Cells CdTe with Back Connection Cu2O","authors":"P. Khaledi, Mahdi Behboodnia, M. Karimi","doi":"10.1155/2022/1207082","DOIUrl":"https://doi.org/10.1155/2022/1207082","url":null,"abstract":"One of the least studied and most important parameters that are ignored in the simulation and construction of solar cells is temperature. The effect of temperature is complex, and the solar cell is a very temperature-sensitive device. Constructing high-efficient solar cells is an essential task. In this paper, we simulated and studied the effect of temperature on the characteristics of FTO/SnO2/CdS/CdTe/Cu2O solar cells using MATLAB and Maple software. For this purpose, first, the transport and Poisson equations, the continuity of the current, and the transfer of the carrier were solved by the drift-diffusion method and then they were discretized. We examined the cell temperature in the range of 200 to 400 Kelvin. The results showed that increasing temperature from 200 to 400 Kelvin open-circuit voltage decreases the short-circuit current. Furthermore, the filling factor first increases and then decreases. The efficiency of the solar cell also decreases sharply with increasing temperature. The results showed that, by decreasing the temperature of the solar cell, an efficiency of more than 32% can be achieved in cadmium telluride solar cells with FTO/SnO2/CdS/CdTe/Cu2O structure.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42764675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Design of a Highly Efficient Subwavelength Antireflective Structure for Solar Cells 太阳能电池高效亚波长抗反射结构的设计
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-02-07 DOI: 10.1155/2022/9963336
Lin Chen, Zhao Huang
{"title":"Design of a Highly Efficient Subwavelength Antireflective Structure for Solar Cells","authors":"Lin Chen, Zhao Huang","doi":"10.1155/2022/9963336","DOIUrl":"https://doi.org/10.1155/2022/9963336","url":null,"abstract":"An efficient optical antireflective (AR) structure plays a vital role in high-performance thin-film solar cells. Here, we design a surface relief AR structure consisting of a two-dimensional (2D) array of a subwavelength ring and pillar-shaped feature, capable of suppressing optical reflection over a wide spectral window of the solar spectrum. Our simulations show that the weighted average reflectance of the subwavelength AR structure is as low as 4.2% in the 400–1100 nm spectral range in the normal incidence condition and almost 10-fold reduction compared with a bare silicon surface. When placed on the front side of a simple Si thin-film photovoltaic solar cell, this subwavelength AR structure leads to an improved light absorption with simulated results showing an increase of 53% short-circuit current compared to a flat solar cell. Besides, our simulations show that this AR structure could, in principle, perform well against reasonable fabrication errors.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":"129 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138517820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinear Extended Kalman Filter for Attitude Estimation of the Fixed-Wing UAV 固定翼无人机姿态估计的非线性扩展卡尔曼滤波
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-02-01 DOI: 10.1155/2022/7883851
Tang Xiaoqian, Zhao Feicheng, Tang Zhengbing, Wang Hongying
{"title":"Nonlinear Extended Kalman Filter for Attitude Estimation of the Fixed-Wing UAV","authors":"Tang Xiaoqian, Zhao Feicheng, Tang Zhengbing, Wang Hongying","doi":"10.1155/2022/7883851","DOIUrl":"https://doi.org/10.1155/2022/7883851","url":null,"abstract":"Flying vehicle’s navigation, direction, and control in real-time results in the design of a strap-down inertial navigation system (INS). The strategy results in low accuracy, performance with correctness. Aiming at the attitude estimation problem, many data fusion or filtering methods had been applied, which fail in many cases, which attains the nonlinear measurement model, process dynamics, and high navigation range. The main problem in unmanned aerial vehicles (UAVs) and flying vehicles is the determination of attitude angles. A novel attitude estimation algorithm is proposed in this study for the unmanned aerial vehicle (UAV). This research article designs two filtering algorithms for fixed-wing UAVs which are nonlinear for the attitude estimation. The filters are based on Kalman filters. The unscented Kalman filter (UKF) and cubature Kalman filter (CKF) were designed with different parameterizations of attitude, i.e., Euler angle (EA) and INS/unit quaternion (UQ) simultaneously. These filters, EA-UKF and INS-CKF, use the nonlinear process and measurement model. The computational results show that among both filters, the CKF attains a high accuracy, robustness, and estimation for the attitude estimation of the fixed-wing UAV.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43291546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Three-Dimensional Reconstruction of Rolling Contact Fatigue Characteristics 滚动接触疲劳特性的三维重构
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-01-24 DOI: 10.1155/2022/3790494
Chengkai Zeng, Gaopeng Xu, Hai Li, Gang Zhu, Yan Yang
{"title":"Three-Dimensional Reconstruction of Rolling Contact Fatigue Characteristics","authors":"Chengkai Zeng, Gaopeng Xu, Hai Li, Gang Zhu, Yan Yang","doi":"10.1155/2022/3790494","DOIUrl":"https://doi.org/10.1155/2022/3790494","url":null,"abstract":"Focusing on the 3D topographic characteristics of rolling contact fatigue, a reconstruction method of the fatigue surface of roller based on point cloud data was proposed in this research. A 3D laser scanner was used to capture the data of point cloud on the surface of the fatigue roller. The gradient segmentation method was used to achieve segmentation of the fatigue contact surface, and the Kd-Tree algorithm in Statistical Outlier Removal filter was adopted to remove different types of noise. The greedy triangulation and hole repair and reconstruction of the curled point cloud were conducted. The experimental results showed that the segmentation accuracy of the fatigue contact surface was above 97.7%, the curling error rate of point cloud was 0.09%, and the maximum deviation of the reconstructed fatigue roller surface was 0.0199 mm. These methods can be applied to analyze the working conditions of roller specimen and contact fatigue.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41590348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of the Shell Thickness of the ZnO/CdS Core-Shell Nanowire Arrays in a CZTS Absorber CZTS吸收器中ZnO/CdS芯壳纳米线阵列壳层厚度的优化
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-01-20 DOI: 10.1155/2022/5301790
Chonge Wang, Boubacar Drame, Lucien Niare, Fu Yuegang
{"title":"Optimization of the Shell Thickness of the ZnO/CdS Core-Shell Nanowire Arrays in a CZTS Absorber","authors":"Chonge Wang, Boubacar Drame, Lucien Niare, Fu Yuegang","doi":"10.1155/2022/5301790","DOIUrl":"https://doi.org/10.1155/2022/5301790","url":null,"abstract":"Copper-zinc-tin-sulfide (CZTS) solar cells have now become a topic of interest in the solar power generation industry. These are used as an absorber in the zinc oxide (ZnO)/cadmium sulfide (CdS) core-shell nanowire arrays, in order to improve the performance of solar cells. The relationship between the average increase in absorption rates and CdS shell thickness (compared to the thin film) reveals that the optimum thickness with the maximum average absorption rate (39.95%) compared to thin film is 30 nm. The cells’ electrical and optical performance was significantly improved with the introduction of graphene between the ZnO and CdS layers. The shell thicknesses for a better performance of these nanowire solar cells were 30 and 40 nm, with almost the same open-circuit voltage, the similar short-circuit current density, and efficiency, which were 630 mV, 6.39 mA/cm<sup>2</sup>, and 16.8%, respectively. Furthermore, a minimum reflection of 40% was obtained with these same shell thicknesses.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":"357 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138517818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Process Plant Upgradation Using Reliability, Availability, and Maintainability (RAM) Criteria 采用可靠性、可用性和可维护性（RAM）标准的工艺装置升级
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-01-13 DOI: 10.1155/2022/4287346
Dongqiao Bai, Qi Yang, Jian Zhang, Shouzhi Li
{"title":"Process Plant Upgradation Using Reliability, Availability, and Maintainability (RAM) Criteria","authors":"Dongqiao Bai, Qi Yang, Jian Zhang, Shouzhi Li","doi":"10.1155/2022/4287346","DOIUrl":"https://doi.org/10.1155/2022/4287346","url":null,"abstract":"The objective of this study is to propose a solution for process plant upgradation becoming extinct due to obsoleteness of spares. The study will help in reliability, availability, and maintainability (RAM) based upgradation of control system of process plants in developing countries. Available options for plant upgradation are compact control, modular, and semiautomatic. RAM based upgradation provides solution which is high in reliability and availability (usually all parts are replaced with upgraded and compatible technology) and is easy to maintain throughout the service life of process plant. Case study for stacker and reclaimer of cement plant upgradation is considered to both implement and evaluate the idea. Upgradation methodology is finalized by expert’s feedback regarding selection of hardware with respect to availability, market survey to validate the opinion, and economical availability viability of selected hardware. Pre- and postupgradation scenarios are analyzed to validate the implementation of study and conclude the expected outcomes. The process plant upgradation yielded a cost-effective solution to the problem with automation increasing by 17%, plant maintainability increasing by 80%, and downtime of plant decreasing by 17%. Among all available options, modular design Op1 is considered the best choice that can satisfy RAM criteria.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42458994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Reflection Characteristics of Airy Beams Impinging on Graphene-Substrate Surfaces Airy光束撞击石墨烯衬底表面的反射特性
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2022-01-03 DOI: 10.1155/2022/5319174
Fuping Wu, Yuanfei Hui, Z. Cui, Ju Wang
{"title":"Reflection Characteristics of Airy Beams Impinging on Graphene-Substrate Surfaces","authors":"Fuping Wu, Yuanfei Hui, Z. Cui, Ju Wang","doi":"10.1155/2022/5319174","DOIUrl":"https://doi.org/10.1155/2022/5319174","url":null,"abstract":"In this work, we analytically and numerically investigate the reflection characteristics of the airy beams impinging on graphene-substrate surfaces. The explicit analytical expressions for the electric and magnetic field components of the airy beams reflected from a graphene-substrate interface are derived. The local-field amplitude, Poynting vector, and spin and orbital angular momentum of the reflected airy beams with different graphene structure and beam parameters are presented and discussed. The results show that the reflection properties of the airy beams can be flexibly tuned by modulating the Fermi energy of the graphene and have a strong dependence on the incident angle and polarization state. These results may have potential applications in the modulation of airy beams and precise measurement of graphene structure parameters.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45761752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of X-Ray Holography X射线全息术的应用
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2021-12-31 DOI: 10.1155/2021/7711028
Bingjun Shi, Yuan Fu, Yan Yang
{"title":"Applications of X-Ray Holography","authors":"Bingjun Shi, Yuan Fu, Yan Yang","doi":"10.1155/2021/7711028","DOIUrl":"https://doi.org/10.1155/2021/7711028","url":null,"abstract":"X-ray holography is widely used in material, biology, and industry fields due to its potential to measure the microstructure and dynamic change of objects. In this review, the principle of X-ray holography and the development of this technology in different application fields are systematically summarized and discussed. Through analyzing the advancement of X-ray sources and recording medium, the research and development direction of X-ray holography are prospected and the overview on current strategies of novel X-ray holography is presented. It is proved that X-ray holography, as a powerful nondestructive measurement method, can be applied to a wide range of objects.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47543793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Coherence Properties and Intensity Distribution of a Partially Coherent Lorentz–Gauss Beam Emerging from the Axicon 部分相干洛伦兹-高斯光束的相干特性和强度分布
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2021-12-31 DOI: 10.1155/2021/3310047
A. Alkelly, Labiba F. Hassan
{"title":"Coherence Properties and Intensity Distribution of a Partially Coherent Lorentz–Gauss Beam Emerging from the Axicon","authors":"A. Alkelly, Labiba F. Hassan","doi":"10.1155/2021/3310047","DOIUrl":"https://doi.org/10.1155/2021/3310047","url":null,"abstract":"The propagation of a partially Lorentz–Gauss beam in a uniform-intensity diffractive axicon is studied according to the Huygens–Fresnel principle, the Hermite–Gaussian expansion of a Lorentz function, and using the stationary phase method. We have derived the intensity equation of a partially coherent Lorentz-Gauss beams propagating through uniform-intensity diffractive axicon, and we proved mathematically that it is the superposition of Bessel beams of various orders after emerging from axicon, using Hermite’s function series and the Bessel function integral formulas. The results show that the intensity distribution of the diffracted beam is the intensity pattern evolved from a Lorentz–Gauss shaped spot into a Gaussian-shaped spot at any position on the focal length of the axicon, and the intensity distribution of a partially Lorentz–Gauss beam generated by an axicon becomes uniform by increasing the beam width and more uniform and constant with the larger coherence width.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46419979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Super-Resolution and Large Depth of Field Model for Optical Microscope Imaging 光学显微镜成像的超分辨率大景深模型
IF 1.7 4区 物理与天体物理
International Journal of Optics Pub Date : 2021-12-29 DOI: 10.1155/2021/6493130
Ruo-Peng Zheng, Shu-Bin Liu, Lei Li
{"title":"Super-Resolution and Large Depth of Field Model for Optical Microscope Imaging","authors":"Ruo-Peng Zheng, Shu-Bin Liu, Lei Li","doi":"10.1155/2021/6493130","DOIUrl":"https://doi.org/10.1155/2021/6493130","url":null,"abstract":"Due to the limitation of numerical aperture (NA) in a microscope, it is very difficult to obtain a clear image of the specimen with a large depth of field (DOF). We propose a deep learning network model to simultaneously improve the imaging resolution and DOF of optical microscopes. The proposed M-Deblurgan consists of three parts: (i) a deblurring module equipped with an encoder-decoder network for feature extraction, (ii) an optimal approximation module to reduce the error propagation between the two tasks, and (iii) an SR module to super-resolve the image from the output of the optimal approximation module. The experimental results show that the proposed network model reaches the optimal result. The peak signal-to-noise ratio (PSNR) of the method can reach 37.5326, and the structural similarity (SSIM) can reach 0.9551 in the experimental dataset. The method can also be used in other potential applications, such as microscopes, mobile cameras, and telescopes.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46418430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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