Results 21 to 30 of about 2,386,661 (289)
HabEx polarization ray trace and aberration analysis [PDF]
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 2018 The flux difference between a terrestrial exoplanet and a much brighter nearby star creates an enormous optical design challenge for space-based imaging systems. Coronagraphs are designed to block the star’s flux and obtain a high-dynamic-range image of the exoplanet. The contrast of an optical system is calculated using the point spread function (PSF).
Davis, Jeffrey +3 more
openaire +2 more sources
, 2011 A three-by-three polarization ray tracing matrix method is developed to calculate the polarization transformations associated with ray paths through optical systems. The relationship between the three-by-three polarization ray tracing matrix P method and
Yun, Garam
core +5 more sources
Single acquisition reconstruction of nonlinear susceptibility and Raman tensors at the diffraction limit [PDF]
APL PhotonicsQuantitative extraction of nonlinear optical tensors at the microscale typically requires sequential polarization scans, mechanical rotations, and careful correction of high-NA polarization distortions.
Volodymyr Multian +2 more
doaj +1 more source
Scientific Reports, 2021 Electromagnetic (EM) metasurfaces are essential in a wide range of EM engineering applications, from incorporated into antenna designs to separate devices like radome.
Ali Lalbakhsh +4 more
doaj +1 more source
Comparison of predictions from a ray tracing microcellular model with narrowband measurements [PDF]
, 1997 In this paper predictions from a 3-D 'image-based' ray tracing model for microcellular environments are compared with three sets of narrowband measurements performed in a typical urban area. The comparisons illustrate that good agreement can be obtained,
Nix, AR, Athanasiadou, G, McGeehan, JP
core +1 more source
A simple P-wave polarization analysis: its application to earthquake location
Annals of Geophysics, 1994 We present a method for hypocentral location which takes into account all three components of ground motion and not only the vertical one, as it is usually done by standard least-square techniques applied to arrival times.
M. Gasperini +4 more
doaj +1 more source
Numerical Tool for Calculating Birefringence in Mirror-Substrates for Gravitational-Wave Detectors
Frontiers in Astronomy and Space Sciences, 2022 The influence of birefringence on rays entering and exiting a non-isotropic medium is a complex process that depends on its dielectric tensor, the orientation and geometry of the medium, the surrounding material, and the inclination of the incident ray ...
Simon Zeidler
doaj +1 more source
An advanced multi-element microcellular ray tracing model [PDF]
, 2004 In this paper an advanced site specific image-based ray-tracing model is developed that enables multi-element outdoor propagation analysis to be performed in a microcellular environment.
Nix, AR, Ng, KH, Tameh, EK
core +1 more source
IEEE Access, 2019 In this paper, the radiation features of indoor WiFi energy-harvesting antennas are analyzed, and the design guidelines that enhance receiving power are proposed.
Yen-Sheng Chen +2 more
doaj +1 more source
Matter and Radiation at Extremes, 2023 We propose a semi-analytical modeling of smoothed laser beam deviation induced by plasma flows. Based on a Gaussian description of speckles, the model includes spatial, temporal, and polarization smoothing techniques, through fits coming from ...
C. Ruyer +6 more
doaj +1 more source