Optical Frontiers最新文献

Research on flame image processing of climbazole production line based on RGB+HSI color model 基于RGB+HSI颜色模型的克里巴唑生产线火焰图像处理研究

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2683898

Zhan Su, HaiQi Xi, Yan Gao, Lin Zhang, Ben Yang, Zhifeng Zhang

引用次数: 0

Study on thermal emission regulation based on refractory metal Mo microstructures 基于难熔金属Mo组织的热发射调控研究

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2683100

Haoxuan Xun, Benard K. Chen, Yusheng Zhou, A. Yang, J. Shao, Yaohui Zhan, Xiaofeng Li

{"title":"Study on thermal emission regulation based on refractory metal Mo microstructures","authors":"Haoxuan Xun, Benard K. Chen, Yusheng Zhou, A. Yang, J. Shao, Yaohui Zhan, Xiaofeng Li","doi":"10.1117/12.2683100","DOIUrl":"https://doi.org/10.1117/12.2683100","url":null,"abstract":"Thermal emitter, as one of the important components in the thermal photovoltaic system, is mainly used to absorb the energy radiated by the heat source and convert it into energy that can be absorbed by the photovoltaic cell. We use the RCWA algorithm to optimize the thermal emitter based on the refractory metal Mo microhole array with a quadrangular arrangement. The optimized structure has a high selective emissivity characteristic in the 1-2.4 μm waveband. The averaged emissivity can reach more than 79.6%, which is about 60% higher than that of the unstructured emitter; at the same time, the band emissivity gradually decreases after the wavelength of 2.4 μm, achieving a selective emission control. Using the laser direct writing technology, dry metal etching, and other micro-fabrication techniques, the thermal emitter is fabricated with the feature sizes as follows: the hole diameter, the array period, and the hole depth are 1 μm, 1.4 μm, and 3.4 μm, respectively; the area with microhole structures is 12×12 mm. The experimental measurement suggests that the averaged emissivity arrives at 70.07%. This study provides an alternative candidate for selective thermal emitters and also offers a technical experience for practical applications.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122223479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Femtosecond laser pulses inscribed EFBG and its sensing characteristics 飞秒激光脉冲刻录EFBG及其传感特性

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684657

Xinyi Liu, P. Jiang, Jialu Wang, Qiang Xu, Tingting Yang, Xinyi Fan

引用次数: 0

Measuring the orbital angular momentum spectrum of vortex beam disturbed by turbulence 湍流扰动涡旋光束轨道角动量谱的测量

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684962

Chao Huang, Lu Bai, Yankun Wang, J. Bai

引用次数: 0

A NiO film photocathode with a signal-weakening photoresponse for hexavalent chromium detection 具有信号减弱光响应的NiO薄膜光电阴极用于六价铬检测

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684053

Wenxiang Lu, Lu Ma, Shengchen Ke, Rouxi Zhang, Weijian Zhu, Linling Qin, Shaolong Wu

引用次数: 0

Image fusion dehazing algorithm based on multi-logarithmic transform 基于多对数变换的图像融合去雾算法

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2683823

Xiaoping Zhou

{"title":"Image fusion dehazing algorithm based on multi-logarithmic transform","authors":"Xiaoping Zhou","doi":"10.1117/12.2683823","DOIUrl":"https://doi.org/10.1117/12.2683823","url":null,"abstract":"In hazy scenarios, suspended particles in the atmosphere will absorb and scatter the transmitted natural light, resulting in a serious degradation of image quality obtained by imaging equipment, which greatly affects the visual perception of images. Aiming at the problems such as low contrast, color distortion and lack of detail information in areas with high haze concentration in images acquired by image acquisition equipment in hazy days, this paper proposes a dehazing algorithm based on exposure image fusion based on multi-logarithmic transform, which improves image quality while effectively dehazing images and avoids the edge effect in the sky part of images after dehazing. Firstly, the original hazy image was transformed by logarithmic multiple times to produce multiple images with different exposure to be fused. Then, all the input images with logarithmic transformation and weight graphs were fused by multi-scale pyramid fusion method to obtain the dehazing image. In order to verify the effectiveness of the algorithm in this paper, the results of the proposed algorithm and six mainstream image dehazing algorithms are compared in two aspects: subjective evaluation and objective evaluation. Experimental results show that the image processed by the proposed algorithm presents better visual effects than that processed by other algorithms. The proposed algorithm can effectively improve image contrast, improve image distortion, improve the visibility of detail information in areas with high hazy concentration, and the scenery color is natural. Good results are obtained under two objective evaluation indexes of image quality, namely peak signal-to-noise ratio and structural similarity, which further proves that the algorithm proposed in this paper has good dehazing performance, can effectively improve the image visibility, and has a good overall color preservation degree of the image.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115567529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomalous wetting behaviors of hierarchical micro-nanostructures parallelly fabricated by ultrafast laser pulses on titanium 超快激光脉冲在钛上平行制备分层微纳结构的异常润湿行为

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2683536

Q. Fu, K. Lou, Jing Qian, Guande Wang, Quanzhong Zhao

引用次数: 0

Partially end-pumped 1319 nm Nd:YAG slab laser 部分端泵浦1319 nm Nd:YAG平板激光器

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684961

Shengzi Zhang, Tanghan Chen, Xiaomeng Liu, Heng-li Zhang, Jiang-Shan Wang, Heqing Guo

引用次数: 1

CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2 CuO修饰的硅纳米线对H2O2的无酶光电传感

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2683954

Ruoxi Zhang, Shengchen Ke, Wenxiang Lu, Weijian Zhu, Lu Ma, Linling Qin, Shaolong Wu

{"title":"CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2","authors":"Ruoxi Zhang, Shengchen Ke, Wenxiang Lu, Weijian Zhu, Lu Ma, Linling Qin, Shaolong Wu","doi":"10.1117/12.2683954","DOIUrl":"https://doi.org/10.1117/12.2683954","url":null,"abstract":"Constructing novel hybrid nanostructure has become an effective strategy to enhance the performance of photoelectrochemical (PEC) biosensors. However, most of the H2O2-sensing photoelectrodes require enzyme modification, which limits the working environment and sensing performance. Herein, the burr-like CuO nanostructures are modified on the entire surfaces of the ordered Si nanowires (SiNWs) by using a combination of magnetron sputtering and hydrothermal growth. The optimized CuO@SiNWs heterojunction with a core-shell structure enables enzyme-free PEC detection of H2O2, achieving a sensitivity of 227.76 μAmM-1cm-2 in the concentration range of 0–588 mM and a detection limit of 7.14 μM (Signal/Noise=3). The excellent sensing performance of the CuO@SiNWs is attributed to the large specific surface area provided by SiNWs and the CuO possess desired H2O2-catalytic activity while providing a great number of active sites. In addition, the CuO@SiNWs demonstrates satisfactory optical absorption. This work demonstrates that enzyme-free and highly sensitive H2O2 detection can be achieved by hybrid nanostructure, providing an alternative route to H2O2 sensing.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126733241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An inversion temperature method based on the relative radiance of the OH spectrum in the ultraviolet band 一种基于紫外波段羟基光谱相对辐射度的温度反演方法

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684887

Dan-meng Zhang, Lu Bai, Mengjun Sun, Yin Li

{"title":"An inversion temperature method based on the relative radiance of the OH spectrum in the ultraviolet band","authors":"Dan-meng Zhang, Lu Bai, Mengjun Sun, Yin Li","doi":"10.1117/12.2684887","DOIUrl":"https://doi.org/10.1117/12.2684887","url":null,"abstract":"In non-steady and high-speed flowing high-temperature environments, local thermal non-equilibrium phenomena are widely present. Therefore, if the Boltzmann distribution, which uses a single temperature to describe the energy level distribution of molecules, is adopted, a large error may exist. To solve this problem, a two-temperature / three-temperature model is often used to calculate the spectral radiation characteristics of OH in local thermodynamic non-equilibrium states. In this paper, taking the BSUV-2 aircraft at a flight altitude of 100 km as an example, The OH radiation characteristics in shock waves with a wavelength range of 305nm-315nm were calculated using the two-temperature model. By comparing the relative spectral radiance of experimental spectra and calculated spectra of OH, the optimal calculation range of vibrational temperature was determined to be 2000K-4000K. This method of measuring rotational temperature has significant advantages in low-resolution situations. After determining the rotational temperature, by simulating and calculating the normalized OH spectral radiance corresponding to different vibrational temperatures in the wavelength range of 270nm-340nm, it was found that the maximum intensity peak G1 is not affected by temperature, while the second largest intensity peak G2 has a linear relationship with temperature. Therefore, we can use the ratio of G1 to G2 to invert the range of rotational temperature. This study shows that using a two-temperature thermodynamic non-equilibrium model in local thermodynamic non-equilibrium states can achieve temperature inversion and accurately describe the spectral radiation characteristics of OH molecules, providing an important reference for related research fields.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131846300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0