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Journal articles on the topic 'Numerical aperture'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Moheb, H., J. Shaker, and L. Shafai. "Numerical and experimental investigation of cavity-backed arbitrary slot antennas." Canadian Journal of Physics 74, no. 3-4 (1996): 122–31. http://dx.doi.org/10.1139/p96-019.

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The equivalence principle and the generalized network formulation are used to model the tangential electric field on arbitrary apertures, backed by a rectangular wave guide or cavity, in terms of equivalent magnetic currents. The coupling is through the aperture whose characteristics are expressed by the aperture admittance matrices of the cavity and half-space regions. The aperture coupling is then expressed as the sum of the two independent aperture admittances, with source terms related to the incident field. The result is an integral equation for the unknown aperture current. This integral

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2

Qin, Zipeng, Gang Li, Yan Tian, Yuwei Ma, and Pengfei Shen. "Numerical Simulation of Thermal Conductivity of Foam Glass Based on the Steady-State Method." Materials 12, no. 1 (2018): 54. http://dx.doi.org/10.3390/ma12010054.

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The effects of fly ash, sodium carbonate content, foaming temperature and foaming time on foam glass aperture sizes and their distribution were analyzed by the orthogonal experimental design. Results from the steady-state method showed a normal distribution of the number of apertures with change in average aperture, which ranges from 0.1 to 2.0 mm for more than 93% of apertures. For a given porosity, the thermal conductivity decreases with the increase of the aperture size. The apertures in the sample have obvious effects in blocking the heat flow transmission: heat flow is quickly diverted to

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3

Tandler, H., L. Schreiber, U. Simon, and H. E. Keller. "Resolution in Light Microscopy." Microscopy and Microanalysis 3, S2 (1997): 1175–76. http://dx.doi.org/10.1017/s1431927600012769.

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The resolution in conventional light microscopy was defined by Abbe as: Wavelength (λ) and Numerical Aperture (NA) have a direct influence while the factor (c) is dependent upon the geometry of the illumination and observation beam paths. Some typical examples are:High illumination apertures in darkfield or oblique illumination or specific ratios between illumination and observation aperture can substantially improve resolution. Various shapes of the illumination aperture, annular, point, centered or off axis at different azimuths directly influence numerical aperture and coherence and with th

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4

Liu, Richeng, Yujing Jiang, Hongwen Jing, and Liyuan Yu. "Nonlinear Flow Characteristics of a System of Two Intersecting Fractures with Different Apertures." Processes 6, no. 7 (2018): 94. http://dx.doi.org/10.3390/pr6070094.

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The nonlinear flow regimes of a crossed fracture model consisting of two fractures have been investigated, in which the influences of hydraulic gradient, surface roughness, intersecting angle, and scale effect have been taken into account. However, in these attempts, the aperture of the two crossed fractures is the same and effects of aperture ratio have not been considered. This study aims to extend their works, characterizing nonlinear flow through a system of two intersecting fractures with different apertures. First, three experiment models with two fractures having different apertures wer

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5

Normatov, Alexander, Boris Spektor, and Joseph Shamir. "Analysis of Phase Distribution of Focused Light in High Numerical Aperture Systems." Key Engineering Materials 437 (May 2010): 616–20. http://dx.doi.org/10.4028/www.scientific.net/kem.437.616.

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High numerical aperture focusing is becoming increasingly important for nanotechnology related applications. Rigorous, vector evaluation of the focused field, in such cases, is usually performed using the Richards-Wolf method which is based on the Debye approach. The resulting field is known to have a piecewise quasi planar phase. A corresponding result, produced by a Fresnel-Kirchhoff integral for aplanatic optical systems of medium and low numerical apertures, leads to the well known physical fact that a quadratic phase exists when the entrance pupil is not located at the front focal plane.

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6

Benı́tez, Pablo, and Juan C. Miñano. "Ultrahigh-numerical-aperture imaging concentrator." Journal of the Optical Society of America A 14, no. 8 (1997): 1988. http://dx.doi.org/10.1364/josaa.14.001988.

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7

Singh, R. N., A. E. Rosenbluth, G. L. T. Chiu, and J. S. Wilczynski. "High-numerical-aperture optical designs." IBM Journal of Research and Development 41, no. 1.2 (1997): 39–48. http://dx.doi.org/10.1147/rd.411.0039.

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8

Liu, Yong-Qiang, Jinhai Sun, Yongxing Che, Kainan Qi, Liangsheng Li, and Hongcheng Yin. "High numerical aperture microwave metalens." Optics Letters 45, no. 22 (2020): 6262. http://dx.doi.org/10.1364/ol.412040.

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9

Gallatin, Gregg M. "High-numerical-aperture scalar imaging." Applied Optics 40, no. 28 (2001): 4958. http://dx.doi.org/10.1364/ao.40.004958.

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10

Wadsworth, W. J., R. M. Percival, G. Bouwmans, et al. "Very High Numerical Aperture Fibers." IEEE Photonics Technology Letters 16, no. 3 (2004): 843–45. http://dx.doi.org/10.1109/lpt.2004.823689.

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11

Kotlyar, V. V., A. G. Nalimov, S. S. Stafeev, et al. "Thin high numerical aperture metalens." Optics Express 25, no. 7 (2017): 8158. http://dx.doi.org/10.1364/oe.25.008158.

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12

Zhao, Jicong, Mingmin Ge, Shitao Lv, Haiyan Sun, and Chenguang Song. "Numerical Investigation of an AlN-Based Resonant Detector with a Plasmon Aperture Absorber for Dual-Band IR Sensing." Electronics 9, no. 8 (2020): 1264. http://dx.doi.org/10.3390/electronics9081264.

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An aluminum nitride (AlN) piezoelectric resonant infrared (IR) detector based on a Lame-wave resonator (LWR) and plasmon apertures was designed for dual-band sensing, and was investigated by using the finite element method (FEM) and finite difference time domain (FDTD) simulations. A plasmon structure with the apertures was designed on the surface of the detector in order to maintain electrical performance and to obtain ultrahigh dual-band IR absorption. The electrical performance of the LWR with the plasmon apertures was comparable to that of the LWR with floating electrodes, which was found

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13

Grebenyuk, A. A., and V. P. Ryabukho. "Numerically focused optical coherence microscopy with structured illumination aperture." Computer Optics 42, no. 2 (2018): 248–53. http://dx.doi.org/10.18287/2412-6179-2018-42-2-248-253.

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Abstract In optical coherence microscopy (OCM) with a given numerical aperture (NA) of the objectives the transverse resolution can be increased by increasing the numerical aperture of illumination (NAi). However, this may also lead to attenuation of the signal with defocus preventing the effective numerically focused 3D imaging of the required sample volume. This paper presents an approach to structuring the illumination aperture, which allows combining the advantages of increased transverse resolution (peculiar to high NAi) with small attenuation of the signal with defocus (peculiar to low N

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14

Sarwar, Jawad, Arun Srinivasa, and Konstantinos Kakosimos. "Numerical investigations of the aperture size effect for maintaining a constant temperature in a novel sulfur-ammonia water splitting cycle application." Thermal Science 21, no. 2 (2017): 953–62. http://dx.doi.org/10.2298/tsci141220075s.

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Solar-driven thermochemical water splitting cycle is a promising, energy efficient and environmentally friendly approach to produce hydrogen. In this paper, numerical work has been undertaken using a cylindrical solar receiver to investigate fixed and variable aperture sizes to maintain constant steady-state temperature over a day for thermochemical part of a novel hybrid photo-thermochemical sulfur-ammonia cycle. A previously developed and validated optical model in commercial software, TracePro? is used to simulate the light sources of 10, 15, and 28 kW. The sunlight intensity variations for

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15

Li, Ying, Jianshu Luo, Guyan Ni, and Jiyuan Shi. "Electromagnetic Topology Analysis to Coupling Wires Enclosed in Cavities with Apertures." Mathematical Problems in Engineering 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/209591.

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We use both electromagnetic topology (EMT) and the Baum-Liu-Tesche (BLT) equation to analyze a cavity model with an aperture. More precisely, we combine the aperture coupling theory and EMT to study the issues of the electromagnetic field penetration through apertures into a cavity and the coupling to a two-wire transmission line in it. We employ the equivalence principle to establish the equivalent source on the aperture. Then, we obtain the semi analytic solutions of the load response of the two-wire line in the cavity based on the Baum-Liu-Tesche (BLT) equation. In addition, based on the Ag

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16

Wang, Yuan, Chenglong Wu, and Yuntian Zhou. "Effect Study of Aperture Distribution on the Capillary Pressure-Saturation Relation for the Single Fracture." Geofluids 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/9656393.

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A systematic numerical method was presented to investigate the effect of aperture distribution on the relation of capillary pressure versus fluid saturation (P-S relation) for a single fracture. The fracture was conceptualized as a two-dimensional lattice-grid model and its aperture field was described by a probability distribution. Based on the invasion percolation theory, a program was developed to simulate the quasi-static displacement. The simulation was verified validly by comparisons of the experimental results. The effects of the statistical parameters were further quantified. The resul

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17

HUANG, NA, RICHENG LIU, and YUJING JIANG. "EVALUATING THE EFFECT OF APERTURE VARIATION ON THE HYDRAULIC PROPERTIES OF THE THREE-DIMENSIONAL FRACTAL-LIKE TREE NETWORK MODEL." Fractals 28, no. 06 (2020): 2050112. http://dx.doi.org/10.1142/s0218348x20501121.

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Hydraulic properties of rock fractures are important issues for many geoengineering practices. Previous studies have revealed that natural rock fractures have variable apertures that could significantly influence the permeability of single rock fractures, yet the effect of aperture variation on the hydraulic properties of fractured rock masses has received little attention. The present study implemented a series of flow calculations on two kinds of 3D fractal-like tree network models constituted by fractures with heterogeneous aperture distributions and parallel plates with uniform apertures t

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18

Kotlyar, V. V., A. G. Nalimov, S. S. Stafeev, L. O'Faolain, and M. V. Kotlyar. "THIN METALENS WITH HIGH NUMERICAL APERTURE." Computer Optics 41, no. 1 (2017): 5–12. http://dx.doi.org/10.18287/2412-6179-2017-41-1-5-12.

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19

Flagello, Donis G., and Tom D. Milster. "High-numerical-aperture effects in photoresist." Applied Optics 36, no. 34 (1997): 8944. http://dx.doi.org/10.1364/ao.36.008944.

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20

Ying Kiang and T. Klieber. "Macrobending effects on fiber numerical aperture." Journal of Lightwave Technology 5, no. 5 (1987): 709–11. http://dx.doi.org/10.1109/jlt.1987.1075561.

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21

Nölscher, Christoph, Leonhard Mader, Sabine Guttenberger, and Wolfgang Arden. "Search for the optimum numerical aperture." Microelectronic Engineering 11, no. 1-4 (1990): 161–66. http://dx.doi.org/10.1016/0167-9317(90)90092-8.

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22

Flagello, D. G., A. E. Rosenbluth, C. Progler, and J. Armitage. "Understanding high numerical aperture optical lithography." Microelectronic Engineering 17, no. 1-4 (1992): 105–8. http://dx.doi.org/10.1016/0167-9317(92)90021-i.

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23

Ouyang, Zhiyong, Yasuhiro Okamoto, Yuta Ogino, Tomokazu Sakagawa, and Akira Okada. "Influence of Numerical Aperture on Molten Area Formation in Fusion Micro-Welding of Glass by Picosecond Pulsed Laser." Applied Sciences 9, no. 7 (2019): 1412. http://dx.doi.org/10.3390/app9071412.

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Focusing condition such as numerical aperture (N.A.) has a great influence on the creation of molten area and the stable welding process in fusion micro-welding of glass. In this study, a picosecond pulsed laser of 1064 nm in wavelength and 12.5 ps in pulse duration was tightly focused inside a borosilicate glass using objective lenses of numerical apertures 0.45, 0.65, and 0.85 with spherical aberration correction. Influence of numerical aperture on molten area formation was experimentally investigated through analysis of focusing situation in glass, and movement of absorption point, and then

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24

Xia, Gui Shu, and Chao Zhou. "Research of Shielding Effectiveness of Metallic Experiment Box Based on ModalMethod of Moments." Applied Mechanics and Materials 380-384 (August 2013): 4376–82. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4376.

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In this paper, electric field shielding effectiveness (SE) of metallic experiment boxwith aperturesilluminated by vertical polarization plane wave has been studied by using modal method of moment technique. Electric field SE has been calculated at three different points on the same plane inside enclosure. The numerical results of the proposed technique are in very good agreement with data available in the literature and experimental results. It is shown that apertures position, aperture number and calculation points have noticeable effect on the electric field SE,four apertures is a better sel

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25

Khonina, Svetlana N., and Andrey V. Ustinov. "Thin Light Tube Formation by Tightly Focused Azimuthally Polarized Light Beams." ISRN Optics 2013 (August 19, 2013): 1–6. http://dx.doi.org/10.1155/2013/185495.

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Theoretical and numerical analysis of the transmission function of the focusing system with high numerical aperture was conducted. The purpose of the study was to form a thin light tube in a focal area using the azimuthally polarized radiation. It was analytically shown that, due to destructive interference of two beams formed by two narrow rings, it is possible to overcome not only the full aperture diffraction limit but also the circular aperture limit. In this case, however, the intensity at the center of the focal plane is significantly reduced, which practically leads to the tube rupture.

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26

Xiaodong Chen, Xiaodong Chen, Yong Lei Yong Lei, Yi Wang Yi Wang, and Daoyin Yu Daoyin Yu. "Resolution enhancement with improved range Doppler algorithm in high numerical aperture OCT." Chinese Optics Letters 9, no. 12 (2011): 121001–4. http://dx.doi.org/10.3788/col201109.121001.

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27

Gardner, Dennis F., Bosheng Zhang, Matthew D. Seaberg, et al. "High numerical aperture reflection mode coherent diffraction microscopy using off-axis apertured illumination." Optics Express 20, no. 17 (2012): 19050. http://dx.doi.org/10.1364/oe.20.019050.

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28

Chen Baosuan, 陈宝算, and 蒲继雄 Pu Jixiong. "Focusing Properties of High-Numerical Aperture Focusing." Laser & Optoelectronics Progress 47, no. 10 (2010): 100501. http://dx.doi.org/10.3788/lop47.100501.

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29

Liang, Haowen, Qiaoling Lin, Xiangsheng Xie, et al. "Ultrahigh Numerical Aperture Metalens at Visible Wavelengths." Nano Letters 18, no. 7 (2018): 4460–66. http://dx.doi.org/10.1021/acs.nanolett.8b01570.

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30

Khmou, Youssef, Said Safi, and Miloud Frikel. "A Numerical Analysis of Double-Aperture Interferences." International Journal of Advanced Science and Technology 114 (May 31, 2018): 151–60. http://dx.doi.org/10.14257/ijast.2018.114.14.

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31

Choi, Youngwoon, Changhyeong Yoon, Moonseok Kim, Juhee Yang, and Wonshik Choi. "Disorder-mediated enhancement of fiber numerical aperture." Optics Letters 38, no. 13 (2013): 2253. http://dx.doi.org/10.1364/ol.38.002253.

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32

Chen Fa-Xin, Zheng Jian, and Yang Jian-Lun. "Numerical simulation of neutron thick aperture imaging." Acta Physica Sinica 55, no. 11 (2006): 5947. http://dx.doi.org/10.7498/aps.55.5947.

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33

Hogan, R. E., R. B. Diver, and Wm B. Stine. "Comparison of a Cavity Solar Receiver Numerical Model and Experimental Data." Journal of Solar Energy Engineering 112, no. 3 (1990): 183–90. http://dx.doi.org/10.1115/1.2930478.

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Results from a numerical model of axisymmetric solar cavity receivers are compared with experimental data for tests of a novel test bed receiver in the Sandia National Laboratories solar furnace. The computed energy transfer rates and temperatures are compared with the experimental data for different receiver geometries, aperture sizes, and operating conditions. In general, the agreement between the numerical model and the experimental data is better for the small-to-midsized apertures than for the large apertures. The analysis indicates that for the larger apertures, the convective heat losse

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34

Isakov, V. N., and V. S. Lankina. "Modeling of the electromagnetic field of radiating aperture." Russian Technological Journal 9, no. 4 (2021): 56–67. http://dx.doi.org/10.32362/2500-316x-2021-9-4-56-67.

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The article is devoted to the issues of numerical calculation of the characteristics of the electromagnetic field of radiating apertures. Тhe radiating aperture is a universal electrodynamic model used in the analysis of a special class of antennas, in particular, mirror and horn antennas, in the study of diffraction phenomena, in the planning of radio wave propagation paths, and when solving problems of wireless transmission of electric energy at a distance. The structure of the electromagnetic field of a radiating aperture in the intermediate and far zones is of the greatest interest accordi

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35

Zhou, Xin, Jianlong Sheng, Ruili Lu, Zuyang Ye, and Wang Luo. "Numerical Simulation of the Nonlinear Flow Properties in Self-Affine Aperture-Based Fractures." Advances in Civil Engineering 2021 (June 5, 2021): 1–11. http://dx.doi.org/10.1155/2021/6687878.

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In order to study the effect of fracture geometry on the nonlinear flow properties in aperture-based fractures, a fractal model based on the self-affinity is proposed to characterize the three-dimensional geometry of rough-walled fractures. By solving the N–S (Navier–Stokes) equation directly, the relationships between the Forchheimer-flow characteristics, fractal dimension, and standard deviation of the aperture have been obtained. The Forchheimer equation is validated to describe the nonlinear relationship between flow rate and pressure gradient. For lower flow rate, the influence of the fra

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36

Shanshan Mao, Shanshan Mao, Yanqiu Li Yanqiu Li, Jiahua Jiang Jiahua Jiang, Shihuan Shen Shihuan Shen, Ke Liu Ke Liu, and Meng Zheng Meng Zheng. "Design of a hyper-numerical-aperture deep ultraviolet lithography objective with freeform surfaces." Chinese Optics Letters 16, no. 3 (2018): 030801. http://dx.doi.org/10.3788/col201816.030801.

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37

Gao, Yin Han, Jun Jie Gu, Kai Yu Yang, Ji Zhi Li, and Hang Zhang. "Study on the Aperture Leakage EMI Problems and its Simulation." Applied Mechanics and Materials 239-240 (December 2012): 274–77. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.274.

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In the design and production process of car’s electronic equipment, the SE of the shield is reduced greatly for the existence of aperture.There is a modeling analysis to the aperture leakage EMI problems and derived a numerical calculation formula of the SE influenced by aperture leakage based on the slot antenna theory, also put forward the way to increase the SE of the shield by using Matlab software to simulate the SE of the shield with three regular apertures in different interference frequency. The simulation results have universal utility and which can provide data support for the design

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38

Zhou, Chao, and Ling Tong. "Study on the Shielding Effectiveness of a Metallic Rectangular Enclosure with Four Square Apertures having Different Position Arrays." Applied Mechanics and Materials 321-324 (June 2013): 2737–44. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.2737.

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In this paper, electric field shielding effectiveness (SE) of rectangular enclosure with four apertures illuminated by vertical polarization plane wave has been studied by using modal method of moment technique. Electric field SE of enclosure with four square apertures has been calculated at three different points on the same plane inside enclosure. The numerical results of the proposed technique are in very good agreement with data available in the literature and experimental results. It is shown that apertures’ position and aperture’ number have noticeable effect on the electric field SE.

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39

Xiao Yun, 肖昀, 张运海 Zhang Yunhai, 杨皓旻 Yang Haomin, and 檀慧明 Tan Huiming. "Focusing of High Numerical Aperture Azimuthally Polarized Beams." Laser & Optoelectronics Progress 52, no. 3 (2015): 031801. http://dx.doi.org/10.3788/lop52.031801.

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40

XU Ming-fei, 徐明飞, 庞武斌 PANG Wu-bin, 徐象如 XU Xiang-ru, 王新华 WANG Xin-hua, and 黄玮 HUANG Wei. "Optical design of high-numerical aperture lithographic lenses." Optics and Precision Engineering 24, no. 4 (2016): 740–46. http://dx.doi.org/10.3788/ope.20162404.0740.

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41

Zhou Yuan, 周远, and 李艳秋 Li Yanqiu. "Bulk Effects in Hyper-Numerical Aperture Optical Lithography." Acta Optica Sinica 28, no. 6 (2008): 1091–95. http://dx.doi.org/10.3788/aos20082806.1091.

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42

Paniagua-Domínguez, Ramón, Ye Feng Yu, Egor Khaidarov, et al. "A Metalens with a Near-Unity Numerical Aperture." Nano Letters 18, no. 3 (2018): 2124–32. http://dx.doi.org/10.1021/acs.nanolett.8b00368.

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43

Estroff, Andrew. "Mask-induced polarization effects at high numerical aperture." Journal of Micro/Nanolithography, MEMS, and MOEMS 4, no. 3 (2005): 031107. http://dx.doi.org/10.1117/1.2037507.

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44

Itonaga, Makoto, Fumihiko Ito, Ryo Saito, Toshiya Saito, Takuji Ohira, and Yoshinari Yokochi. "Single Objective Lens with Numerical Aperture of 0.95." Japanese Journal of Applied Physics 44, no. 5B (2005): 3420–22. http://dx.doi.org/10.1143/jjap.44.3420.

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45

Patino-Jurado, Brayan, Juan F. Botero-Cadavid, and Jorge Garcia-Sucerquia. "Step-Index Optical Fibers With 0.88 Numerical Aperture." Journal of Lightwave Technology 37, no. 15 (2019): 3734–39. http://dx.doi.org/10.1109/jlt.2019.2919669.

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46

Asahara, Yoshiyuki, Hiroyuki Sakai, Sigeaki Ohmi, Shin Nakayama, Yoshitaka Yoneda, and Tetsuro Izumitani. "Gradient-index slab lens with high numerical aperture." Applied Optics 25, no. 19 (1986): 3384. http://dx.doi.org/10.1364/ao.25.003384.

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47

Nussbaum, Ph. "Low numerical aperture refractive microlenses in fused silica." Optical Engineering 40, no. 7 (2001): 1412. http://dx.doi.org/10.1117/1.1385335.

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48

Ippolito, S. B., B. B. Goldberg, and M. S. Ünlü. "Theoretical analysis of numerical aperture increasing lens microscopy." Journal of Applied Physics 97, no. 5 (2005): 053105. http://dx.doi.org/10.1063/1.1858060.

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49

Sheppard, C. J. R., and K. G. Larkin. "Effect of numerical aperture on interference fringe spacing." Applied Optics 34, no. 22 (1995): 4731. http://dx.doi.org/10.1364/ao.34.004731.

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50

Murray, Kevin T., Andrew J. Morgan, Mauro Prasciolu, Istvan Mohacsi, Henry N. Chapman, and Saša Bajt. "Characterization of High Numerical Aperture Multilayer Laue Lenses." Microscopy and Microanalysis 24, S2 (2018): 282–83. http://dx.doi.org/10.1017/s1431927618013740.

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