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1
Geometrical optics methods for moving anisotropic media: a tool for magnetized plasmas
Published 2025-01-01Subjects: “…geometrical optics…”
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Analysis of the Relationship of Video Text and Urban Image Communication Based on the Calculation Method of Wedge Diffraction in Geometrical Optics
Published 2022-01-01“…Based on the calculation method of wedge diffraction in geometrical optics, various heuristic uniform diffraction formulas of lossy wedge are compared and analyzed, and a better heuristic formula of uniform diffraction of lossy wedge is given. …”
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3
Multibeam Antennas Based on 3-D Discrete Lenses With Magnified Field-of-View
Published 2025-01-01Subjects: Get full text
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Computer simulation of diffractive imaging lenses using hyperspectral images
Published 2023-10-01Subjects: Get full text
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Bessel Beam Diffraction by an Aperture in an Opaque Screen
Published 2015-01-01“…The uniform versions of field expressions are derived. The geometrical optics and diffracted and scattered fields are examined numerically.…”
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The manual of photography /
Published 2009Table of Contents: “…Introduction to the imaging process -- Light theory -- Photographic light sources -- The human visual system -- Introduction to colour science -- Photographic and geometrical optics -- Images and image formation -- Sensitometry -- Image sensors -- Camera lenses -- Photographic camera systems -- Exposure and image control -- Image formation and the photographic process -- Digital cameras and scanners -- Displays -- Digital printing and materials -- Digital image file formats -- Image storage media and archiving -- Introduction to image quality and system performance -- Speed and sensitivity -- Tone reproduction -- Photographic colour reproduction -- Digital colour reproduction -- Noise, sharpness, resolution and information -- Digital image workflow -- Colour management systems -- Spatial image processing -- Digital image processing in the frequency domain -- Image compression.…”
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TECHNIQUE OF ESTIMATE OF ABSORPTION COEFFICIENT LASER RADIATION IN BORON DOPED DIAMONDS BY INTENSITY OF RAMAN SCATTERING
Published 2015-03-01“…Dependences of integral intensity and halfwidth of diamond Raman line with respect to the doping level are presented. In the geometrical optics approximation an expression for doped to undoped integral intensity ratio is obtained. …”
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Shaped Omnidirectional Reflector Fed by a Dielectric Lens Associated with a Coaxial Feed Horn
Published 2023-01-01“…A simple formula describes the lens shape obtained by applying Fermat’s principle to control the rays’ caustic emerging from the dielectric interface. Based on geometrical optics (GO) principles, a synthesis technique defines the reflector shape to control the antenna radiation pattern in the vertical plane. …”
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Useful Solutions for Plane Wave Diffraction by Dielectric Slabs and Wedges
Published 2012-01-01“…The resulting diffraction coefficients are expressed in terms of the geometrical optics response of the considered structure and the standard transition function of the Uniform Geometrical Theory of Diffraction. …”
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Omnidirectional Dual-Reflector Antenna with GO Shaped Main Reflector for Pattern Control in the Elevation Plane: OADC Case
Published 2012-01-01“…The procedure is based on geometrical optics (GO) principles. Two distinct far-field ray structures are explored and their limitations are identified. …”
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An Empirical Model of Angle-of-Arrival Variance for a Gaussian Wave Propagation through Non-Kolmogorov Turbulence
Published 2020-01-01“…The numerical simulations indicate that, under the geometrical optics approximation, the AOA variance for a Gaussian wave is insensitive to the change of the diffraction parameter and can be closely approximated by a simple linear relationship in the refraction parameter. …”
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Wireless Channel Model Based on Ray Tracing Algorithm in the Sea Environment
Published 2024-01-01“…This study investigates the sensitivity of a three-dimensional (3D) maritime ray tracing (RT) model for the use of the geometrical optics in radio channel characterizations of maritime environments. …”
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Shaping Single Offset Reflector Antennas Using Local Axis-Displaced Confocal Quadrics
Published 2016-01-01“…This work investigates a novel numerical procedure for the solution of an exact formulation for the Geometrical Optics synthesis of a single reflector antenna by simultaneously imposing Snell’s Law and Conservation of Energy in a tube of rays, yielding a second-order nonlinear partial differential equation of Monge-Ampère type, which can be solved as a boundary value problem. …”
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P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space
Published 2015-01-01“…Inspired by the idea of the improved electric field integral operator (IEFIO), the geometrical-optics current/principle value term of the magnetic field integral equation is used as a physical perturbation to stabilize the traditional ILUT perconditioning matrix. …”
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Application of GO Management in Bistatic RCS Computation Using the Vector Parabolic Equation Method
Published 2013-01-01“…In this letter, we introduce the geometric optics (GO) management in the calculation of bistatic radar cross sections using three-dimensional vector PE method. …”
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PENGEMBANGAN PENUNTUN PRAKTIKUM FISIKA DASAR II MENGGUNAKAN TEKNOLOGI AUGMENTED REALITY PADA MATERI RANGKAIAN LISTRIK DAN OPTIK GEOMETRIS
Published 2019-08-01“…Kata kunci: Penelitian Pengembangan, Penuntun Praktikum, Augmented Reality This research was aimed to produce a Valid Practicum Guide Modul of Second Basic Physics by using augmented reality technology in the material of electric circuits and geometric optics, as well as to find out student responses about that. …”
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Nanostructures for Enhanced Light Absorption in Solar Energy Devices
Published 2011-01-01“…These include enhanced optical absorption of composite photocatalytically active TiO2/graphitic carbon films, systems with enhanced surface plasmon resonance, field-enhanced absorption in nanofabricated carbon structures with geometrical optical resonances and excitation of waveguiding modes in supported nanoparticle assembles. …”
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A Novel Universal Applicability Design Method for Low Cross-Polarization Terahertz Tri-Reflector CATR
Published 2022-01-01“…By using the beam mode analysis method and cross-polarization elimination conditions, the geometric configurations of the tri-reflector CATR can be designed for feeds in any different rotation angles, and then according to the kinematic and dynamic ray-tracing method with frequency independence in geometric optics, shaped subreflectors can also be synthesized. …”
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Modeling the Reflectance of the Lunar Regolith by a New Method Combining Monte Carlo Ray Tracing and Hapke’s Model with Application to Chang’E-1 IIM Data
Published 2014-01-01“…The existing modeling methods exploit either a radiative transfer model or a geometric optical model. However, the measured data from an Interference Imaging spectrometer (IIM) on an orbiter were affected not only by the composition of minerals but also by the environmental factors. …”
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