Results 31 to 40 of about 60,075 (261)
Photonics, 2022 In this paper, using the Richards–Wolf equations, the focusing of circularly polarized light with flat diffractive lenses is considered. It is shown that, as the numerical aperture (NA) of the lens increases, the size of the focal spot first decreases ...
Sergey S. Stafeev +2 more
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IEEE Photonics Journal, 2021 Defocus detection technology is the key technology in the fields of laser direct writing, optical disc storage, and high-precision lithography, which directly affects the accuracy of line drawing.
Jia-Lin Du +7 more
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Development of Type 73 GH Equal Hole Perforating Charge
Cejing jishu, 2023 In order to solve the problem of the perforation gun not being centered in the casing due to the gravity of the perforation gun during unconventional horizontal well perforation operations in oil and gas reservoirs, and the uneven perforation of the ...
SUN Chengliang +5 more
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Applied Sciences, 2019 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.
Zhiyong Ouyang +4 more
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COMPARISON OF HOGHORN ANALYSIS METHODS
Perner’s Contacts, 2020 The paper compares an aperture method and full-wave numerical simulations of hoghorn, which is used as a simple primary feed for reflector antennas or individually without reflector.
Vladimir Schejbal +3 more
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Numerically focused optical coherence microscopy with structured illumination aperture [PDF]
Компьютерная оптика, 2018 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).
Anton Grebenyuk, Vladimir Ryabukho
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Phase-Controlled Planar Metalenses for High-Resolution Terahertz Focusing
Photonics, 2021 We experimentally demonstrate that high-resolution terahertz focusing can be realized in planar metalenses, which consist of arrays of different V-shaped antenna units on a silicon substrate.
Xin Yu +5 more
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Numerical Study on the Orthogonality of the Fields Radiated by an Aperture
Mathematics, 2023 This work studies the orthogonality of the fields radiated by the different modes of a radiating aperture. Waveguide modes exhibit an orthogonality property at the aperture cross-section that can be used to simplify calculations. However, it is unclear whether this property can be extended to the radiated fields produced by these same modes in ...
López Polo, Lucas +4 more
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Benzene Shape Photonic Crystal Fiber Based Plasma Sensor: Design and Analysis
Photonic Sensors, 2018 A novel benzene core photonic crystal fiber (BC-PCF) is proposed for plasma sensing applications. The proposed BC-PCF parameters have been tuned to gain high sensitivity, high numerical aperture (NA), and low confinement loss, and modality over the ...
Md. Toriqul Islam +3 more
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Design of 3D SAW Filters Based on the Spectral Element Method
IEEE Access, 2023 Surface acoustic wave (SAW) devices are key components in 5G communication systems, and the design of SAW filters with high frequency, high performance and high reliability is a necessary and challenging task. In this work, SAW resonators with $LiNbO_{3}
Yiwen Yao +4 more
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