Results 21 to 30 of about 60,075 (261)
IEEE Access, 2021 In this paper,a polarization-maintaining single-mode rectangular-shaped hollow-core waveguide with four segmented air cladding in the terahertz (THz) regime is presented for detecting various toxic industrial chemicals.
M. Hussayeen Khan Anik +7 more
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Ultra-wide angle lens design with relative illumination analysis [PDF]
Journal of the European Optical Society-Rapid Publications, 2016 An ultra-wide angle lens design with relative illumination analysis is presented. The half field angle of 80°, the relative illumination of the image plane will be reduced.
Sun W.-S. +3 more
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Linearly polarized field of a flat aperture
Физика волновых процессов и радиотехнические системы, 2023 The article analyzes a flat circular aperture and proposes to use a new analytical expression that describes the radiation pattern of an elementary radiator of an antenna aperture depending on time and integration angle.
Sergey P. Skulkin +4 more
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Strain‐Multiplex Metalens Array for Tunable Focusing and Imaging
Advanced Science, 2021 Metalenses on a flexible template are engineered metal‐dielectric interfaces that improve conventional imaging system and offer dynamic focusing and zooming capabilities by controlling the focal length and bandwidth through a mechanical or external ...
Rajib Ahmed, Haider Butt
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Компьютерная оптика, 2021 The effect of the width of the angular spectrum (numerical aperture) of a broadband-frequency wave-field probing a layered object on the signal of an autocorrelation low-coherence interferometer (ALCI) under spatially coherent and incoherent illumination
D.V. Lyakin, V.P. Ryabukho
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Femtosecond Laser Fabrication of Submillimeter Microlens Arrays with Tunable Numerical Apertures
Micromachines, 2022 In recent years, the demand for optical components such as microlenses has been increasing, and various methods have been developed. However, fabrication of submillimeter microlenses with tunable numerical aperture (NA) on hard and brittle materials ...
Tongzhen Yang +8 more
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Engineering Proceedings, 2023 This paper investigates the design and tuning of a Broadband Dispersion Compensating Modified Honeycomb Lattice Photonic Crystal Fiber (MHL-PCF) with outstanding features such as strong birefringence and nonlinearity.
Amit Halder +3 more
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Nanophotonics, 2020 Owing to the potential to manipulate simultaneously amplitude and phase of electromagnetic wave, complex-amplitude holographic metasurfaces (CAHMs) can achieve improved image-reconstruction quality compared with amplitude-only and phase-only ones ...
Mu Yongheng +4 more
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Minimal focal spot obtained by focusing circularly polarized light
Компьютерная оптика, 2023 In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to
S.S. Stafeev, V.D. Zaitcev, V.V. Kotlyar
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FEM-based modeling of microsphere-enhanced interferometry
Light: Advanced Manufacturing, 2022 To improve the lateral resolution in microscopic imaging, microspheres are placed close to the object’ s surface in order to support the imaging process by optical near-field information.
Tobias Pahl +3 more
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