National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Study of spherical aberration
Fojtík, Tomáš ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This thesis deals with the theoretical analysis of rays passing through lenses. Emphasis on optical defects, particularly focusing on spherical aberration lenses. It also includes the preparation of a workplace and the measurement of spherical aberration and evaluate the quality of different lenses. Furthermore, a program for simulation of spherical aberration lens.
Support system for administration and control of FSO transceiver
Janík, Lukáš ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
Tato práce se zabývá problematikou optických bezkabelových spojů (FSO). V úvodní kapitole jsou diskutovány přednosti, základní principy a dílčí komponenty FSO spojů. Druhá kapitola se zabývá atmosférou z pohledu šířícího se optického svazku, jejím složením, základními veličinami a jevy v ní nastávajícími. V následující kapitole je popsáno několik metod ke zmírnění jevů majících negativní vliv na kvalitu spoje. Druhá část práce se zabývá návrhem podpůrného systému pro FSO, založeném na softcore mikroprocesoru MicroBlaze, návrhem jednoduchého síťového přepínače a síťového rozhraní. Závěr práce pojednává o implementaci webového serveru a tvorbě webové prezentace umožňující vzdálenou správu FSO a jeho komponent.
Web Browser Control Using Gestures
Němeček, Jiří ; Zahrádka, Jiří (referee) ; Najman, Pavel (advisor)
This thesis describes web browser control possibilities using touchless gestures captured over Microsoft Kinect sensor. It presents gesture reading and analyzing procedures for further processing. Particular aspects of design and implementation of the sample application are also shown here. Final part consits of application usability testing summary and describes possibilities of its further deployment.
Measurement of the Mechanical Stability of Buildings and Consoles Used for the FSO Links
Kočvara, Pavel ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
The Master's thesis deals with the determination of measurement method of deflection the axis of the optical beam from its ideal position, which is caused by action of force of strong winds affecting the positional stability of the building or supporting structure (tower) used for placement of FSO links'heads. The thesis informs the readers about the other causes of deflection of beam axis in a real environment, about methods of determining the position of the beam axis in the plane perpendicular to the beam axis and the basic properties and parameters of the Gauss beams, including the phenomenon of diffraction on the output aperture of the laser transmitter.
Power Budget of the Laser Rangefinder
Kotol, Martin ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
The thesis analyzes the optical laser range finders in real propagation environments. Itdescribes the various parts of optical laser range finders their properties and principles in relation to their performance balance. The paper presents the basic optical properties of lenses used in the transmitter and receiver. A separate chapter is devoted to the transit time method and factors influencing the measurement. The proportional directional reflectance analysisis a part of the thesis. In conclusion, the thesis contains the practical laboratory measurements of the relative directional reflectance of different materials and colors, and verification of the power level diagram.
Power losses in optical part of the link working in free space
Szajkó, Juraj ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
Tato diplomová práce pojednává o charakteristikách laserových diod, difrakcí a o vlastnostech gausovského svazku. Je určen útlum vazby vysílací dioda - vysílací apertura v závislosti na velikostech apertury a na velikosti svazku v programu MATLAB. Jsou stanoveny optimální parametry vazby apertura-dioda.
Radiation pattern shaping of the optical transmitter
Csonka, Gábor ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This work deals with questions of space assembling of several optics beams. There are mentioned the base features and values of space distribution of beam intensity in laser beam. The forms of diffusion of space localized light that is described by beam optics. There is a characterization of Gaussian beam, and diffraction of several beams. There is mentioned a simulation an assembling of two and more beams. It contains model of assembling incoherent beams. The work also includes suggestion of final layout of laser beams, which form optical transmitter with radiating characteristics, resistant to defects evoked by atmosphere.
Laser transmitter with fiber
Hašek, Jaroslav ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This master´s thesis deals with communication which is provided by optical devices. Optical wireless links are enforced due to high bit rate, responsibility and noise immunity. Main part of this master´s project is devoted to optical fibre, its characteristic and its usage in laser transmitter.
Measurement of the optical intensity distribution at the far field
Vitásek, Jan ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
The topic of this master’s thesis is energy measurement of the optical intensity distribu-tion at the far field. Properties of the optical intensity and the optical power are described. In this thesis solution of wave equation is done. The plane wave, spherical wave and Gaussian beam are described. In this thesis, optical trace of laser beam from transmitter laser diode to receiver PIN photodiode is described. One of the solved problems is diffraction on the lens socket. The basic configuration for diffraction investigation on lens socket was created. There were transmitting laser diode, stop with circular apertures and PIN photodiode used in the experiment. In the other part, thesis deals with measuring and detection of the optical beam. Sorts of photodiodes and their characteristics were analysed.
Analýza akciových titulů z burzovního indexu DAX
Němeček, Jiří ; Bauerová, Jarmila (advisor) ; Janda, Karel (referee)
Diplomová práce se zabývá analýzou akciových titulů z německého burzovního indexu DAX. Úvodní kapitola diplomové práce obsahuje korelační analýzu indexu DAX s dalšími akciovými indexy. Hlavní kapitola je zaměřena na využití fundamentální analýzy při ohodnocování akciových titulů z dotyčného burzovního indexu DAX. Ohodnocování akciových titulů je prováděno pomocí dividendového diskontního modelu a modelů ziskových. Závěr tvoří zkoumání úspěšnosti investičních strategií založených na fundamentálních akciových ukazatelích.

See also: similar author names
1 Němeček, J.
11 Němeček, Jakub
23 Němeček, Jan
4 Němeček, Jaroslav
2 Němeček, Jaroslav,
4 Němeček, Josef
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