作者单位
摘要
1 北京空间机电研究所,北京 100094
2 北京邮电大学,北京 100876
全景环带光学系统凭借周视范围实时成像的特点已在超大视场光学领域中得到了广泛应用。传统的全景环带光学系统将折射、反射面集成在一片块状透镜中,光线在其内部进行多次折、反射导致头部单元体积较大,同时红外透镜材料密度大、折射率温度稳定性差等特点也与光学遥感器轻量化、可靠性高的应用需求相矛盾。文章基于像差理论,讨论了全景环带两反射镜红外光学系统头部单元初始结构设计方法,将Q型(Q-Type多项式)非球面引入全景头部单元增加优化变量,用偏离因子因子${k_{{\text{RMS}}}}$数值表征非球面加工难度,设计了以两反射镜为头部单元的全景环带红外光学系统。该系统在奈奎斯特频率(20线对/mm)处调制传递函数优于0.5;全视场像元(25 μm×25 μm区域内)能量集中度优于65%,像质评价结果表明其成像品质良好。该设计在缩小系统体积、提高光学设计优化效率方面有很大的改进,满足超大视场实时成像的应用需求。
全景环带光学系统 超大视场 Q型非球面 光学遥感器 panoramic ring optical system wide field of view Q-Type aspheric surface optical remote sensor 
航天返回与遥感
2024, 45(1): 90
作者单位
摘要
1 浅水湖泊综合治理与资源开发教育部重点实验室(河海大学), 江苏 南京 210024河海大学环境学院, 江苏 南京 210024
2 江苏环保产业技术研究院股份公司, 江苏 南京 210019
3 江苏省苏力环境科技有限责任公司, 江苏 南京 210019
环境条件的变化能够影响和改变溶解态有机质(DOM)的组成结构及化学特征, 进而影响其生物地球化学循环过程。 采用同步荧光光谱、 三维荧光光谱、 傅里叶变换红外光谱(FTIR), 结合二维相关光谱分析方法, 研究了pH条件变化对DOM特性及其与Cu2+相互作用的影响。 结果表明, (1)随着pH值由5逐渐升高至10, DOM不同组分的荧光强度显著增强, 其中类腐殖酸组分变化最显著, 类富里酸组分变化最优先, 这是由于pH的变化引起的醛酮、 酚基、 羧基等相关基团暴露导致的。 (2)荧光光谱二维相关分析表明, pH的改变能够显著地影响DOM不同组分与Cu2+的结合能力, 但并不能影响其结合顺序。 三维荧光光谱结合平行因子分析共解析出3个荧光组分, 荧光组分的淬灭曲线非线性拟合结果更是定量验证了这一结果。 (3)FTIR结果表明高pH条件下DOM与Cu2+结合点位更多, 结合强度更强。 pH 5和pH 10条件下DOM官能团与Cu2+的结合顺序分别依次为: 多糖C—O>酚基>醛酮CO>芳香族C—H和多糖C—O>酰胺Ⅱ带C—N>酚基>脂肪族C—H>醛酮CO>羧基C—OH>芳香族C—H>羧基CO。 荧光光谱和FTIR的异谱二维相关分析进一步表明Cu2+与DOM类腐殖酸组分的相互作用滞后于酚基和芳基等基团。
荧光光谱 傅里叶红外光谱 溶解态有机质 二维相关 Fluorescence spectroscopy Fourier transform infrared spectroscopy Dissolved organic matter pH pH Two-dimensional correlation 
光谱学与光谱分析
2023, 43(5): 1628
Hairui Bai 1Ruijie Ma 4,*Wenyan Su 5,9,**Top Archie Dela Peña 6,7[ ... ]Wei Ma 1,******
Author Affiliations
Abstract
1 State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
2 Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
3 Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education/National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, People’s Republic of China
4 Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Kowloon, 999077 Hong Kong, People’s Republic of China
5 School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, People’s Republic of China
6 Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, 999077 Hong Kong, People’s Republic of China
7 Advanced Materials Thrust, Function Hub, The Hong Kong University of Science and Technology, Nansha Guangzhou, People’s Republic of China
8 School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
9 Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
10 Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, People’s Republic of China
11 Xi’an Key Laboratory of Liquid Crystal and Organic Photovoltaic Materials, State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an Modern Chemistry Research Institute, Xi’an 710065, People’s Republic of China
Power-conversion-efficiencies (PCEs) of organic solar cells (OSCs) in laboratory, normally processed by spin-coating technology with toxic halogenated solvents, have reached over 19%. However, there is usually a marked PCE drop when the blade-coating and/or green-solvents toward large-scale printing are used instead, which hampers the practical development of OSCs. Here, a new series of N-alkyl-tailored small molecule acceptors named YR-SeNF with a same molecular main backbone are developed by combining selenium-fused central-core and naphthalene-fused end-group. Thanks to the N-alkyl engineering, NIR-absorbing YR-SeNF series show different crystallinity, packing patterns, and miscibility with polymeric donor. The studies exhibit that the molecular packing, crystallinity, and vertical distribution of active layer morphologies are well optimized by introducing newly designed guest acceptor associated with tailored N-alkyl chains, providing the improved charge transfer dynamics and stability for the PM6:L8-BO:YR-SeNF-based OSCs. As a result, a record-high PCE approaching 19% is achieved in the blade-coating OSCs fabricated from a green-solvent o-xylene with high-boiling point. Notably, ternary OSCs offer robust operating stability under maximum-power-point tracking and well-keep > 80% of the initial PCEs for even over 400 h. Our alkyl-tailored guest acceptor strategy provides a unique approach to develop green-solvent and blade-coating processed high-efficiency and operating stable OSCs, which paves a way for industrial development.
Nano-Micro Letters
2023, 15(1): 241
马赫 1,2,*梁荻 2曹生硕 2陈雪梅 2[ ... ]匡波 2
作者单位
摘要
1 电子科技大学基础与前沿研究院, 成都 611731
2 成都光明光电股份有限公司, 成都 610199
3 电子科技大学材料与能源学院, 成都 611731
研究了不同添加量的La2O3和Y2O3对盖板用化学强化高铝玻璃性能的影响, 发现适当加入La2O3和Y2O3可提高玻璃生产的适应性、机械性质和化学强化性能。加入La2O3和Y2O3可显著降低高铝玻璃的高温黏度, La3+和Y3+总物质的量分数每增加0.5%, 玻璃澄清温度降低6~20 ℃。加入La2O3和Y2O3提高了玻璃的杨氏模量、剪切模量和显微维氏硬度; 当La3+和Y3+总物质的量分数为1.5%时, 玻璃杨氏模量、剪切模量和显微维氏硬度达到最大, 分别为84.33、33.90和6.48 GPa。随La2O3和Y2O3含量的增加, 化学强化后玻璃表面压应力(CS)有先增大后减小的趋势, 应力层深度(DOL)有先基本不变后增大的趋势, 且CS比对照组最多提升28%。拉曼光谱分析发现在La3+和Y3+总物质的量分数为0~1.5%时, 随着玻璃中La3+和Y3+含量的增加, 非桥氧含量基本不变, 而受碱金属影响的桥氧含量显著增加; 当La3+和Y3+总物质的量分数为1.5%~2.5%时, 增加La3+和Y3+含量可显著提高玻璃中非桥氧含量。
高铝玻璃 化学强化 玻璃黏度 aluminosilicate glass chemical strengthen La2O3 La2O3 Y2O3 Y2O3 glass viscosity 
玻璃搪瓷与眼镜
2023, 51(6): 7
作者单位
摘要
华中科技大学武汉光电国家研究中心,武汉 430070
动态调光玻璃可根据气候变更选择性地调控目标光谱波段的光通量,从而具备良好的光热管理能力,因此在建筑行业的节能转型中备受重视。其中,能够对可见光、近红外、长波红外等多波段进行独立调控的动态调光玻璃因高效的光谱利用率,更有利于发挥节能优势。本文围绕多波段调控节能玻璃,简要介绍了光谱调控对玻璃节能的作用,详细概述了现阶段实现多波段调控的主要手段,并基于研究现状提出产业化进程中面临的诸多挑战。同时结合近期报道的前沿技术,展望其未来发展趋势。
建筑能耗 节能玻璃 多波段调控 电致变色 热致变色 building energy consumption energy-efficient glazing multi-band modulation electrochromism thermochromism 
硅酸盐学报
2023, 51(9): 2492
祝熙翔 1,2,*胡斌 2
作者单位
摘要
1 北京交通大学 物理科学与工程学院,发光与光信息技术教育部重点实验室,北京 10044
2 田纳西大学 材料物理与工程学院,田纳西 诺克斯维尔 130022
当前,有机和钙钛矿材料在发光显示和太阳能电池等领域得到了广泛的应用。为了更好地深入研究这些材料的特性和优化其性能,研究人员需要对它们的激发态动力学过程进行充分的了解。为此,利用磁?光?电综合手段成为了研究这些材料的重要方法之一。通过这些手段,可以对有机和钙钛矿材料的激发态动力学过程进行精确表征,并得出其结构的细节特征,如电子?空穴对分离过程和体内极化等。此外,这些手段还可以研究材料的磁光特性和电学性质,从而为实现这些材料的跨学科交叉研究提供支持。本文结合作者的研究工作,阐述了基于钙钛矿和有机材料,利用磁?光?电研究手段在非线性发光薄膜和光伏器件方面展开的相关研究。通过这些研究,可以更好地理解这些材料的性能和特征,并为开发更先进的光电器件奠定基础。
有机 钙钛矿 磁-光-电 跨学科 organic perovskites magneto-opto-electronic interdisciplinary 
发光学报
2023, 44(7): 1287
Author Affiliations
Abstract
1 Beijing Engineering Research Center for Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
2 Beijing Key Laboratory for Metamaterials and Devices, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, and Beijing Advanced Innovation Center for Imaging Technology, Department of Physics, Capital Normal University, Beijing 100048, China
3 e-mail: yzhang@cnu.edu.cn
Graphene-based terahertz (THz) metasurfaces combined with metallic antennas have the advantages of ultra-small thickness, electrical tunability, and fast tuning speed. However, their tuning ability is limited by non-independently tunable pixels and low modulation depth due to the ultra-small thickness of graphene. Here, we demonstrate a reconfigurable THz phase modulator with 5×5 independently tunable units enabled by switching the voltages applied on 10 graphene ribbons prepared by laser cutting. In addition, by introducing quasi-bound states in the continuum resonance through a designed double C-shaped antenna, the efficiency of the device is enhanced by 2.73.6 times under different graphene chemical potentials. Experimental results demonstrate that a focus can be formed, and the focal length is changed from 14.3 mm to 22.6 mm. This work provides potential for compact THz spatial light modulators that may be applied in THz communication, detection, and imaging.
Photonics Research
2023, 11(7): 1185
Author Affiliations
Abstract
1 Beijing Engineering Research Center for Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
2 Beijing Key Laboratory of Metamaterials and Devices, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Advanced Innovation Center for Imaging Theory and Technology, Department of Physics, Capital Normal University, Beijing 100048, China
3 e-mail: hubin@bit.edu.cn
4 e-mail: yzhang@cnu.edu.cn
High-order Bessel beams are of great interest for most stable long-range optical quantum communications due to their unique nondiffraction, self-healing, and orbital angular-momentum-carrying capabilities. Until now, metasurfaces based on Bessel beam generators are mostly static and focused on generating zero-order Bessel beams. A moiré meta-device made of two cascaded metasurfaces is a simple, effective strategy to dynamically manipulate the wavefront of electromagnetic (EM) waves by mutual rotation between the two metasurfaces. Here, an all-dielectric moiré meta-device integrated with the functions of an axicon and a spiral phase plate to generate terahertz Bessel beams is designed. Not only the order, but also the nondiffraction length of the generated Bessel beam can be continuously tuned. As a proof of concept of the feasibility of the platform, the case of tuning order is experimentally demonstrated. The experimental results are in good agreement with the theoretical expectations. In addition, we also numerically proved that the nondiffraction length of the Bessel beam can be adjusted with the same approach. The moiré meta-device platform is powerful in dynamically manipulating the wavefront of EM waves and provides an effective strategy for continuously controlling the properties of the Bessel beam, which may find applications in optical communications, particle manipulation, and super-resolution imaging.
Photonics Research
2023, 11(1): 108
叶茂 1,2刘恒泉 1,2赵毅强 1,2,*孙泽文 1,2胡彬 1,2
作者单位
摘要
1 天津大学 微电子学院,天津 300072
2 天津市成像与感知微电子技术重点实验室,天津 300072
FMCW激光雷达以其高精度、抗干扰能力强、同时测距测速等特点得到了广泛研究。针对FFT固有栅栏效应引入测距、测速误差的问题,通过分析频谱幅值和相角的规律,并结合正弦函数原理提出了一种易于硬件实现的修正Rife算法,有效地降低了传统Rife算法在估计频率接近FFT量化频率点时的误差。通过仿真和FPGA验证,修正Rife算法在信噪比为−10 dB时相较于传统Rife算法平均误差降低了69.6%,均方根误差降低了50.7%,而计算量仅增加了两个乘法和加法,与N点FFT计算量相比可忽略不计。最后,通过搭建光学测试平台,模拟激光雷达中频回波信号验证了该算法的有效性。测试结果显示,该算法可在112 m范围内实现同时测距测速,测距误差不大于5 cm,测速误差不大于0.16 km/h,满足实时性要求。
FMCW激光雷达 频率估计 修正Rife算法 FPGA FMCW LiDAR frequency estimation modified Rife algorithm FPGA 
红外与激光工程
2022, 51(12): 20220222
李晓曼 1,2胡斌 1,2何嘉亮 1葛建云 3[ ... ]徐冰 1
作者单位
摘要
1 北京空间机电研究所,北京 100094
2 先进光学遥感技术北京市重点实验室,北京 100094
3 航天东方红卫星有限公司,北京 100094
针对遥感器真空低温测试需求,设计并搭建了一套能够在低温真空环境中稳定工作的红外目标背景模拟器,模拟器主要由冷光阑、真空低温面源黑体、三维电移台三部分组成,冷光阑模拟探测背景,冷光阑上分布微孔用于模拟探测点目标。通过有效控制目标模拟器与背景模拟器间的隔热、控温以及背景模拟器与待测遥感器之间的隔热,实现稳定测试。另外,将仿真优化与实践经验相结合,通过仿真计算去除模拟器冷光阑板厚度、目标相位、平行光管等的影响,有效降低系统测量不确定度。文中的仿真分析方法和验证情况对于红外遥感器点目标探测信噪比检测试验具有参考意义。
探测信噪比 光学遥感器 红外目标背景模拟器 平行光管 detection signal-to-noise ratio optical remote sensor infrared target background simulator collimator 
红外与激光工程
2022, 51(8): 20210929

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