IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-07 DOI: 10.1016/j.ijleo.2024.172110

Ramnarayan , Ravindra Singh , Priyanka Yadav , Yogesh Sharma , Surendra Prasad

In this present research article, we have investigated analytically the characteristics of the fundamental mode of hybrid surface plasmon phonon polariton (HSPPhPs) mode in a circular cylindrical three-layer graphene (CTLG) waveguide structure. The dispersion equation of HSPPhPs is derived by using Maxwell’s equations and continuity conditions of tangential components of electric and magnetic fields in cylindrical geometry. The dispersion curve has been illustrated and thoroughly examined in relation to the effects of temperature and chemical potential (

μ_{c}

) of graphene, as well as variations in the thickness of silicon dioxide (SiO₂) and hexagonal boron nitride (hBN) layers, and found that in the presence of hBN, the effective mode index exhibits hyperbolic behavior with wave number. Up to the first Reststrahlen band (∼830.57 cm⁻¹), it varies slightly with graphene temperature; increasing graphene's (

μ_{c}

) lowers the index, while a thicker hBN layer reduces it, whereas the index increases with SiO₂ layer thickness. Also, we looked at how the CTLG waveguide structure is affected by the electric field distribution, phase speed, and propagation length.

在本研究文章中，我们分析研究了圆柱形三层石墨烯（CTLG）波导结构中混合表面等离子体声子极化子（HSPPhPs）基本模式的特性。通过使用麦克斯韦方程和圆柱几何中电场和磁场切向分量的连续性条件，推导出了 HSPPhPs 的色散方程。我们结合石墨烯的温度和化学势（μc）的影响，以及二氧化硅（SiO2）和六方氮化硼（hBN）层厚度的变化，对色散曲线进行了说明和深入研究，发现在存在 hBN 的情况下，有效模式指数随波数的变化呈现双曲线行为。直到第一个雷斯特拉伦带（∼830.57 cm-¹），它都会随着石墨烯温度的变化而略有变化；石墨烯 (μc) 的增加会降低指数，而更厚的 hBN 层会降低指数，而指数则会随着 SiO₂ 层厚度的增加而增加。此外，我们还研究了 CTLG 波导结构如何受到电场分布、相位速度和传播长度的影响。

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引用次数: 0

Daytime radiative cooling using pattern free metal dielectric coating 利用无图案金属介质涂层进行日间辐射制冷

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-06 DOI: 10.1016/j.ijleo.2024.172098

Jitendra Kumar Pradhan , Dheeraj Pratap

Radiative coolers, which dumps the excess heat to the cold outer space by releasing the thermal radiation through the atmospheric window, have offered an alternate and feasible solution to the conventional coolers that are fuelled on the electricity produced by either using renewal or non-renewal sources like fossil fuels. Particularly, daytime passive radiative coolers have paved the way for many energy free technology that are used in reducing the temperature of building tops, power plants, and water harvesting. In this, we propose a pattern free and large area scalable bi-layered thin film based daytime radiative cooler. The proposed design illustrates an average reflectivity of 98.5% for the solar spectrum, while showing average emittance of 91% within the atmospheric window (8-

13 μ m

). The design consists of thin films of transparent dielectrics such as ZnS or BaF₂ placed on top of a thick glass substrate, that is backed by a thin film of silver. We theoretically obtained a cooling power of 119 W m⁻² with a temperature reduction of 9 °C below the ambient.

辐射冷却器通过大气窗口释放热辐射，将多余的热量释放到寒冷的外层空间，为传统冷却器提供了一种替代和可行的解决方案，传统冷却器的电力来源是化石燃料等可再生或不可再生资源。特别是，日间被动辐射冷却器为许多用于降低建筑物顶部温度、发电厂和水收集的无能源技术铺平了道路。在本文中，我们提出了一种无图案、可大面积扩展的基于双层薄膜的日间辐射冷却器。建议的设计对太阳光谱的平均反射率为 98.5%，而在大气窗口（8-13μm）内的平均发射率为 91%。该设计由透明电介质薄膜（如 ZnS 或 BaF2）组成，置于厚玻璃基板之上，基板背面有一层银薄膜。我们从理论上获得了 119 W m-2 的冷却功率，温度比环境温度降低了 9 °C。

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引用次数: 0

Liquid crystal display with high transmittance and excellent image quality

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-06 DOI: 10.1016/j.ijleo.2024.172105

Jing Liu , Xiaoying Huang , Zhigang Peng , Xiaojin He , Hongyuan Xu

High transmittance and excellent image quality are two crucial requirements for thin-film transistor liquid crystal displays (TFT-LCDs). This work presents a novel pixel structure utilizing a vertical alignment liquid crystal (VA-LC) to improve both transmittance and image quality. The new pixel structure, called TCL-pixel, features a unique transparent conducting layer (TCL) that constructs an electric field shielding layer and a large transparent storage capacitor, resulting in good stability and a large aperture ratio. The 55" 8 K product incorporating the TCL-pixel achieves high transmittance (3.87 %) and a high contrast ratio (5100:1), attributed to the large aperture ratio. Additionally, it exhibits negligible vertical cross talk (0.7 %), low color cross talk (3 ‰), low horizontal cross talk (JND 2.3), and enhanced variable refresh rate performance, confirming its good stability. Furthermore, the TCL-pixel demonstrates an improved viewing angle (CESI 0.03：65°) due to the multi-domain alignment produced by the transparent conducting layer.

引用次数: 0

Integrated all-fiber-optic sensor based on FPI and MZI composite structures for temperature and strain measurement 基于 FPI 和 MZI 复合结构的集成式全光纤传感器，用于温度和应变测量

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-05 DOI: 10.1016/j.ijleo.2024.172111

Yinggang Liu, Xinyi Xu, Rui Zhou, Rui Li, Fei Li

In this paper, a temperature and strain sensor based on fiber-optic Mach-Zehnder interferometer (MZI) cascaded with Fabry-Perot interferometer (FPI) is designed and fabricated. The integrated sensor structure consists of no-core fiber (NCF) sandwiched by two sections of multi-mode fiber (MMF), hollow-core fiber (HCF), and two single-mode fibers (SMF) which are cascaded at the ends of the MMF and the HCF. Due to the thermal expansion effect, thermo-optic and elasto-optic effects of fiber material, the increase of the temperature and strain will make the change of the transmission mode, which will cause the spectral fringes wavelength shifting with strain, and the intensity of the spectral fringes varying with temperature but not strain variations in multiple temperature ranges. The series experiments valid show that the sensor with integrated structure realizes the strain and temperature measurements in multiple temperature ranges, and the minimum and maximum temperature sensitivities are − 0.278 dBm/°C and − 0.670 dBm/°C in the temperature range of 68–86 °C and 123–141 °C, respectively. The strain sensitivity is 2.17 pm/με all over the measured range. The integrated sensor structure has the advantages of high sensitivity, multiple measuring ranges, simple manufacturing, and low cost, which has the potential to be applied in the field of the internal strain and temperature measurements of different structures.

本文设计并制作了一种基于光纤马赫-泽恩德干涉仪（MZI）与法布里-珀罗干涉仪（FPI）级联的温度和应变传感器。集成传感器结构由两段多模光纤（MMF）夹着的无芯光纤（NCF）、中空芯光纤（HCF）和两根单模光纤（SMF）组成，这两根单模光纤级联在多模光纤和中空芯光纤的两端。由于光纤材料的热膨胀效应、热光学效应和弹性光学效应，温度和应变的增加会使其传输模式发生变化，从而导致光谱条纹波长随应变移动，光谱条纹的强度随温度变化而变化，但在多个温度范围内不随应变变化。系列实验结果表明，集成结构的传感器可在多个温度范围内实现应变和温度测量，在 68-86 ℃ 和 123-141 ℃ 温度范围内，最小和最大温度灵敏度分别为 - 0.278 dBm/℃ 和 - 0.670 dBm/℃。在整个测量范围内，应变灵敏度为 2.17 pm/με。该集成传感器结构具有灵敏度高、测量范围多、制造简单、成本低等优点，有望应用于不同结构的内部应变和温度测量领域。

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引用次数: 0

Accounting for intensity variation within pixels of Shack-Hartmann wavefront sensors 考虑夏克-哈特曼波前传感器像素内的强度变化

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-05 DOI: 10.1016/j.ijleo.2024.172107

Suman Sangiri , Alfredo Dubra , Vyas Akondi

The accuracy of centroiding algorithms in Shack-Hartmann wavefront sensing is limited by the implicit approximation of uniform pixel illumination. Iterative centroiding algorithms are further limited by the consideration of full pixels to define the image domain for centroiding. Here, we demonstrate two practical and complementary approaches to mitigate both these sources of error. First, we consider partial or ‘fractional’ pixels to maintain centroiding area symmetry around the center of mass. Secondly, we propose methods to perform piece-wise polynomial interpolation to calculate intensity distribution within pixels, which is then used to estimate the centroid within each pixel area. This approach that accounts for intensity non-uniformity across pixels notably reduces centroid errors up to a factor of 5 across lenslet image widths ranging from 1.33 to 3.10 pixels full-width-half-maximum (FWHM). Consequently, wavefront sensing errors decrease from 14 % to 4 %, on average, for FWHM = 1.35 pixels, demonstrating a substantial benefit when the number of pixels per lenslet is minimized to enhance the signal-to-noise ratio or increase frame rate.

Shack-Hartmann 波前传感中的中心定位算法的精度受到均匀像素照明的隐含近似值的限制。而迭代中心定位算法又因需要考虑全像素来定义中心定位的图像域而受到进一步限制。在这里，我们展示了两种实用且互补的方法来减少这两种误差来源。首先，我们考虑了部分或 "小数 "像素，以保持质量中心周围的定中心区域对称。其次，我们提出了执行片断多项式插值的方法，以计算像素内的强度分布，然后用于估算每个像素区域内的中心点。这种方法考虑到了像素间强度的不均匀性，在小透镜图像宽度为 1.33 至 3.10 像素全宽-半最大值（FWHM）的情况下，可将中心点误差显著降低 5 倍。因此，当 FWHM = 1.35 像素时，波前感应误差平均从 14% 降至 4%，这表明当为了提高信噪比或提高帧频而尽量减少每个小透镜的像素数时，波前感应会带来很大的好处。

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引用次数: 0

Optomechanical entanglement induced by backward stimulated Brillouin scattering 后向受激布里渊散射诱导的光机械纠缠

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-04 DOI: 10.1016/j.ijleo.2024.172097

P. Djorwé , A.-H. Abdel-Aty , K.S. Nisar , S.G.N. Engo

We propose a scheme to generate robust optomechanical entanglement, i.e., the entanglement between a mechanical and an optical modes. This scheme is based on a Backward Stimulated Brillouin Scattering (BSBS) process, which is hosted within an optomechanical structure. Our benchmark system consists of an acoustic (mechanical) mode coupled to two optical modes through an electrostrictive (radiation pressure) effect. After determining the optimal acoustic parameters allowing the entanglement in our system, we have shown that both the acoustic coupling and the decay rate require a certain threshold from where the optomechanical entanglement is generated. For instance, to generate an optomechanical entanglement in our proposal, the strength of the used acoustic decay rate most exceed both the mechanical and optical decay rates, which is the figure of merit of our proposal. The generated entanglement is robust enough against thermal fluctuation. Our work provides a new scheme for entanglement generation based on BSBS effect, and can be extended to microwaves and hybrid optomechanical structures. Such a generated entangled states can be used for quantum information processing, quantum sensing, and quantum computing.

我们提出了一种产生稳健光机械纠缠（即机械模式和光学模式之间的纠缠）的方案。该方案基于后向受激布里渊散射（BSBS）过程，并将其置于光机械结构中。我们的基准系统包括通过电致伸缩（辐射压力）效应耦合到两个光学模式的声学（机械）模式。在确定了允许在我们的系统中产生纠缠的最佳声学参数之后，我们已经证明，声学耦合和衰减率都需要一定的阈值才能产生光机械纠缠。例如，要在我们的方案中产生光机纠缠，所使用的声衰减率强度必须超过机械和光学衰减率，这就是我们方案的优点。生成的纠缠对热波动有足够的鲁棒性。我们的工作为基于 BSBS 效应的纠缠生成提供了一种新方案，并可扩展到微波和混合光机电结构。这种生成的纠缠态可用于量子信息处理、量子传感和量子计算。

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引用次数: 0

Optimization of C-like sandwich wall structure for high microwave transmission 用于高微波传输的 C 型夹层壁结构优化

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-11-01 DOI: 10.1016/j.ijleo.2024.172096

Manal M. Al-Ali , Abd Alghany Jaradat , Ahmed M. Al-Khateeb , Sami H. Mahmood

A multilayered structure of five planar slabs ((Glass epoxy/PU Foam/Vacuum/PU Foam/Glass epoxy) was investigated for broadband microwave propagation. In this study, theoretical calculations of the transmittance, reflectance and absorbance characteristics of the multilayer structure were carried out using the ABCD transfer matrix method, and numerical calculations were obtained using the COMSOL Multiphysics simulation software. The propagation characteristics were investigated as a function of frequency up to the Ka-band and versus angle of incidence ranging from normal to grazing incidence. The results of the theory and simulation were in excellent agreement. The average transmittance for unpolarized or circularly polarized wave was 97% over the S to the K bands, whereas up to 86% transmission was observed at the end of the Ka-band. Higher than 95% transmission of incident waves with frequency 10 GHz was observed over a wide range of angles of incidence up to

70 °

, after which the transmittance decreased sharply to zero at a grazing incidence (

θ_{1} = 90 °

). The results revealed that the absorbance is negligibly small and the incident energy was either transmitted or reflected. The reflectance for both TE and TM wave modes increased appreciably in the angular range

75 ° \leq θ_{1} \leq 90 °

and approached 100% at grazing incidence. The curves of the reflectance versus angle of incidence for representative frequencies in the S and X bands revealed a Brewster-like effect for the TM wave mode, while the reflectance of the TE mode varied monotonically, without showing a minimum characteristic of a Brewster-like reflectionless condition.

研究了由五块平面板（玻璃环氧树脂/聚氨酯泡沫/真空/聚氨酯泡沫/玻璃环氧树脂）组成的多层结构的宽带微波传播。在这项研究中，使用 ABCD 传递矩阵法对多层结构的透射率、反射率和吸收率特性进行了理论计算，并使用 COMSOL Multiphysics 仿真软件进行了数值计算。研究了从频率到 Ka 波段的传播特性，以及从法线入射到掠入射的入射角。理论和模拟结果非常吻合。从 S 波段到 K 波段，非极化或圆极化波的平均透过率为 97%，而在 Ka 波段末端观察到的透过率高达 86%。在高达 70° 的宽入射角范围内，频率为 10 GHz 的入射波的透射率高于 95%，此后，在掠入射角（θ1=90°）处，透射率急剧下降至零。结果表明，吸收率非常小，入射能量要么被传输，要么被反射。在 75°≤θ1≤90°的角度范围内，TE 波和 TM 波模式的反射率明显增加，在掠入射时接近 100%。S 波段和 X 波段代表性频率的反射率随入射角变化的曲线显示，TM 波模式具有类似布儒斯特的效应，而 TE 波模式的反射率则单调变化，没有显示出类似布儒斯特的无反射条件的最小特征。

{"title":"Optimization of C-like sandwich wall structure for high microwave transmission","authors":"Manal M. Al-Ali , Abd Alghany Jaradat , Ahmed M. Al-Khateeb , Sami H. Mahmood","doi":"10.1016/j.ijleo.2024.172096","DOIUrl":"10.1016/j.ijleo.2024.172096","url":null,"abstract":"<div><div>A multilayered structure of five planar slabs ((Glass epoxy/PU Foam/Vacuum/PU Foam/Glass epoxy) was investigated for broadband microwave propagation. In this study, theoretical calculations of the transmittance, reflectance and absorbance characteristics of the multilayer structure were carried out using the ABCD transfer matrix method, and numerical calculations were obtained using the COMSOL Multiphysics simulation software. The propagation characteristics were investigated as a function of frequency up to the Ka-band and versus angle of incidence ranging from normal to grazing incidence. The results of the theory and simulation were in excellent agreement. The average transmittance for unpolarized or circularly polarized wave was 97% over the S to the K bands, whereas up to 86% transmission was observed at the end of the Ka-band. Higher than 95% transmission of incident waves with frequency 10 GHz was observed over a wide range of angles of incidence up to <span><math><mrow><mn>70</mn><mo>°</mo></mrow></math></span>, after which the transmittance decreased sharply to zero at a grazing incidence (<span><math><mrow><msub><mrow><mi>θ</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>=</mo><mspace></mspace><mn>90</mn><mo>°</mo></mrow></math></span>). The results revealed that the absorbance is negligibly small and the incident energy was either transmitted or reflected. The reflectance for both TE and TM wave modes increased appreciably in the angular range <span><math><mrow><mn>75</mn><mo>°</mo><mo>≤</mo><msub><mrow><mi>θ</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>≤</mo><mn>90</mn><mo>°</mo></mrow></math></span> and approached 100% at grazing incidence. The curves of the reflectance versus angle of incidence for representative frequencies in the S and X bands revealed a Brewster-like effect for the TM wave mode, while the reflectance of the TE mode varied monotonically, without showing a minimum characteristic of a Brewster-like reflectionless condition.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"318 ","pages":"Article 172096"},"PeriodicalIF":3.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Novel reddish-orange emitting BaBPO5:Eu3+ phosphor for n-UV warm white-LEDs: Synthesis and study of structural and spectroscopic investigations 用于 n-UV 暖白光 LED 的新型橘红色发光 BaBPO5:Eu3+ 荧光粉：结构和光谱的合成与研究

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-10-30 DOI: 10.1016/j.ijleo.2024.172103

T. Chandra Mohan , T. Raghu Raman , K. Venkata Rao , P. Sai Dinesh , Y.C. Ratnakaram

A novel reddish-orange emitting 2Ba_2-xO-B₂O₃-P₂O₅:xEu³⁺ (x= 0.04, 0.06, 0.08, 0.10, 0.12 and 0.14 mol%) phosphor with different concentrations of Eu³⁺ ions were synthesized through high temperature solid-state reaction technique. The crystal structure has been studied by X-ray diffraction technique for all the concentrations of Eu³⁺ ions. The morphology and elemental analysis of the optimal ∼0.1 mol% concentration was examined by the SEM-EDS images. The functional groups were analysed by the FTIR characterization technique. The thermal properties were studied by the TGA-DSC analysis. The energy band gap of all the samples were analysed by using UV–VIS DRS technique. The photoluminescence properties of BaBPO₅:Eu³⁺ phosphor with different concentrations of Eu³⁺ ions were investigated at λ_em = 611 nm and λ_ex = 394 nm. Variation in emission intensity with Eu³⁺ ion concentrations, phonon side bands, multi-phonon relaxation rate and energy transfer mechanisms were studied. The BaBPO₅:Eu³⁺ phosphors exhibit characteristic emission peaks corresponding to ⁵D₀ → ⁷F_J (J = 0, 1, 2, 3, 4) transitions of Eu³⁺ ions under n-UV excitation. Among all the transitions, ⁵D₀ → ⁷F₁ (593 nm) transition shows higher intensity and asymmetric ratio (R₂₁) for all concentrations of Eu³⁺ ions were calculated. The lifetimes of ⁵D₀ level of Eu³⁺ ions in BaBPO₅: Eu³⁺ phosphor were calculated by using fluorescent decay curve analysis. The CIE color coordinates reveal, reddish-orange emission in the low CCT range. These findings imply that BaBPO₅: 0.1Eu³⁺ phosphor is a promising candidate for solid-state lighting applications as well as phosphor-converted warm w-LEDs.

通过高温固态反应技术合成了含有不同浓度 Eu3+ 离子的新型橘红色发光 2Ba2-xO-B2O3-P2O5:xEu3+（x= 0.04、0.06、0.08、0.10、0.12 和 0.14 mol%）荧光粉。通过 X 射线衍射技术研究了所有 Eu3+ 离子浓度的晶体结构。通过扫描电镜-电子显微镜（SEM-EDS）图像对最佳浓度 ∼0.1 mol% 的形貌和元素分析进行了研究。傅立叶变换红外特性技术分析了官能团。热性能通过 TGA-DSC 分析进行了研究。使用 UV-VIS DRS 技术分析了所有样品的能带间隙。在 λem = 611 纳米和 λex = 394 纳米波长下，研究了不同浓度 Eu3+ 离子的 BaBPO5:Eu3+ 荧光粉的光致发光特性。研究了发射强度随 Eu3+ 离子浓度、声子边带、多声子弛豫速率和能量传递机制的变化。在正紫外激发下，BaBPO5:Eu3+荧光粉显示出与 Eu3+ 离子的 5D0 → 7FJ （J = 0、1、2、3、4）跃迁相对应的特征发射峰。在所有跃迁中，5D0 → 7F1（593 nm）跃迁的强度较高，计算得出所有浓度 Eu3+ 离子的不对称比（R21）。通过荧光衰减曲线分析，计算了 BaBPO5: Eu3+ 荧光粉中 Eu3+ 离子 5D0 电平的寿命。CIE 色坐标显示，在低 CCT 范围内，荧光呈橘红色。这些研究结果表明，BaBPO5: 0.1Eu3+ 荧光粉是固态照明应用以及荧光粉转换暖色发光二极管的理想候选材料。

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引用次数: 0

Autoencoder-based image fusion network with enhanced channels and feature saliency 基于自动编码器的图像融合网络，具有增强的通道和特征显著性

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-10-30 DOI: 10.1016/j.ijleo.2024.172104

Hongmei Wang , Xuanyu Lu , Ze Li

The existing deep learning based infrared and visible image fusion technologies have made significant progress, but there are still many problems need to be solved, such as information loss (targets and texture, etc.) of both infrared and visible images, noise and artifacts existing in fused image. To address these issues in fusion, an infrared and visible image fusion method based on autoencoder network is proposed in this paper. Firstly, novel enhanced channels are designed and input parallelly with source images into the network to enhance the specific features and reduce information loss in feature fusion. Then, the feature maps are obtained by the encoder. Next, a feature fusion method based on feature saliency is proposed, using a pre-trained classifier to measure the saliency of features, and the fused image is obtained by the decoder finally. Experimental results demonstrate that the targets are obvious and the textures are plentiful in the fused images generated by the proposed method. Also, the objective metrics of the proposed method are higher than the state of the art methods, which demonstrate that the proposed method is effective to fuse the infrared and visible images.

现有的基于深度学习的红外与可见光图像融合技术已取得重大进展，但仍有许多问题亟待解决，如红外图像和可见光图像的信息丢失（目标和纹理等）、融合图像中存在的噪声和伪影等。为了解决融合中的这些问题，本文提出了一种基于自动编码器网络的红外与可见光图像融合方法。首先，设计了新的增强信道，并将其与源图像并行输入网络，以增强特定的特征，减少特征融合中的信息损失。然后，通过编码器获得特征图。接着，提出一种基于特征显著性的特征融合方法，使用预先训练好的分类器来测量特征的显著性，最后由解码器得到融合后的图像。实验结果表明，该方法生成的融合图像目标明显，纹理丰富。同时，所提方法的客观指标也高于现有方法，这表明所提方法能有效地融合红外图像和可见光图像。

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引用次数: 0

Design of freeform elements with a large exit pupil for AR display 为 AR 显示屏设计具有大出口瞳孔的自由形态元件

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2024-10-29 DOI: 10.1016/j.ijleo.2024.172101

Olga Afanaseva, Artem Solomashenko, Maria Shishova, Larisa Timashova, Gaik Sagatelyan, Ivan Tsyganov

This work presents an augmented reality display consisting of two freeform lenses. The first lens is composed of two aspherical polished surfaces and one plane surface, while the second lens acts as a compensator to allow distortion-free viewing of the surrounding area. One benefit of this design is the large size of the exit pupil, reaching up to 12 mm, and the low distortion value of 1.63 %. The optics has a thickness of 22 mm and is compatible with 0.49-in. diagonal displays. The field of view is limited to 28°, which is sufficient for various augmented reality applications.

该作品展示了一种由两个自由形态透镜组成的增强现实显示屏。第一个透镜由两个非球面抛光表面和一个平面组成，而第二个透镜则作为补偿器，可以无畸变地观察周围区域。这种设计的优点之一是出口瞳孔大，可达 12 毫米，畸变值低，仅为 1.63%。光学器件的厚度为 22 毫米，可与对角线为 0.49 英寸的显示器兼容。视场角限制在 28°，足以满足各种增强现实应用的需要。

引用次数: 0

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