Przeglądaj {{ collection }} wg Autor "Pieszyński, Krzysztof"

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Effect of light beam deviation from Bragg angle on the intensity of light diffracted on acoustic wave
(Wydawnictwo Politechniki Łódzkiej, 2010) Pieszyński, Krzysztof
The paper describes the influence of the effect of light beam deviation from Bragg angle on the intensity of light diffracted on acoustic wave. The analysis was based on the results of numerical calculations. The calculations were made for several characteristic cases.
Gaussian light beam propagation in inhomogeneous medium
(Wydawnictwo Politechniki Łódzkiej, 2008) Pieszyński, Krzysztof
In this work the results of numerical calculations describing propagation of Gaussian light beam in inhomogeneous media is presented. Numerical calculation was based on scalar wave approximation. Additionally the split-step beam propagation method was exploited.
Propagation of laser beam in air stream colliding with non streamlined obstacle
(Wydawnictwo Politechniki Łódzkiej, 2011) Klemm, Katarzyna; Pieszyński, Krzysztof; Rożniakowski, Kazimierz
The paper presents measurements of refractive index structure constant Cn in the region of air inflow in vicinity of non streamlined obstacle (a model of a building) placed on a flat surface. Examinations were conducted in aerodynamic tunnel which transverse dimensions were much bigger than the examined model. The applied narrow beam of laser light had elliptical cross-section. Computations of Cn parameter were based on the dancing spot model [1].
Some of the photothermal properties of one- and two-layer structures
(Wydawnictwo Politechniki Łódzkiej, 2007) Pieszyński, Krzysztof
The results of numerical calculations of temperature on a multi-layer structures' surface illuminated with intensity periodically-modulated beam of light are presented. In fact the influence of some geometrical and thermal properties such structures on the amplitude of time-dependant temperature component is shown. Moreover, only one- and two-layer structures are taken into account.
Spatial frequency filtering of images using the diffraction in acousto-optic cell
(Wydawnictwo Politechniki Łódzkiej, 2012) Pieszyński, Krzysztof
The paper presents the optical spatial frequency filter that allows to filter in real time by using a 0th order diffraction in the acoustooptic cell, which operates in the Bragg regime.