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Automatic measurement of LED spectrum
Žabka, Jindřich ; Hudcová, Lucie (referee) ; Skryja, Petr (advisor)
Teoretical part of the thesis is introducing light sources. Here are examinated the principles of light generation in these light sources, basic radiometry and photometry variables, according to which are these sources sorted and their operating parameters. The parameters describing quality of light sources are also mentioned here. Next part examinates LEDs, theirs usual construction types and most common SMD LED packages. Part about optical spectroscopy describes usually used components for optical measurement. Practical part narrates appropriate organization of workplace, LabVIEW platform, communication process with instruments and a guide describing measure process. There is a solved laboratory protocol as an attachement.
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Characteristics of the atmosphere of Mars for optical communication
Marčák, Tomáš ; Barcík, Peter (referee) ; Hudcová, Lucie (advisor)
The bachelor thesis is focused on the issue and research of atmosphere of the planet Mars for optical communication. The main goal of this thesis was to introduce the transmission through the atmosphere of the Mars and define possible wavelengths which could be used as possible communication. This thesis mainly introduces the optical communication and facts about the atmosphere of the planet. The main chapter presents more detailed analysis of composition of the atmosphere, the impact of the composition that is used for the radiation transmission. Lastly there are presented the results of the calculations and characteristics of the transmission through the Mars atmosphere. The next chapter is focused on theory of optical transmitters and its division. Subsequently, thesis describes the program for calculation of temporal, spatial and energetic characteristics of optical beam.
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Automatic measurement of LED spectrum
Žabka, Jindřich ; Hudcová, Lucie (referee) ; Skryja, Petr (advisor)
Teoretical part of the thesis is introducing light sources. Here are examinated the principles of light generation in these light sources, basic radiometry and photometry variables, according to which are these sources sorted and their operating parameters. The parameters describing quality of light sources are also mentioned here. Next part examinates LEDs, theirs usual construction types and most common SMD LED packages. Part about optical spectroscopy describes usually used components for optical measurement. Practical part narrates appropriate organization of workplace, LabVIEW platform, communication process with instruments and a guide describing measure process. There is a solved laboratory protocol as an attachement.
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Optical signal detection and maesurement of low deflections using the Michelson interferometer
Kováč, Petr ; Hudcová, Lucie (referee) ; Křivák, Petr (advisor)
The dissertation is concerned with the description and utilization of interference of two coherent optical rays. In addition, the conditions of coherence and its connections with the occurance of interference are discussed. Michelson's interferometer is used for the practical utilization of the interference effect. The possibility of measuring relatively small changes is demonstrated - deviation of piezocrystal, measurement of the coherent length of optical source and measurement of the index of refraction of tramsparent materials. The manner of optical coherent detention and its utilization in optical communication systems is indicated. After demonstration of the principle was carried out the measuring of detection of optical signal modified by the external modulator.
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Measurement of optical lenses parameters
Wintr, Aleš ; Coufalíková,, Aneta (referee) ; Hudcová, Lucie (advisor)
This paper contains a basic overview and description of optical lenses. It introduces different types of optical lenses and shows how they influence the passing of light beams. It deals with the production of optical lenses and their practical use. It describes types of optical blemishes that exist in real optical systems. Particular attention is given to parameters of optical lenses and their measurement in practice. It includes a Matlab program to calculate parameters of optical lenses derived from the measurements.
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Evaluation of KAP-meters in Rtg Devices
Hlavička, Jiří ; Hudcová, Lucie (referee) ; Wilfert, Otakar (advisor)
The main targets of this thesis have been to get familiarized with theoretical and practical aspects of device, used for measurement of the radiation burden of patients in the health service and to verify suitability of them for the assessment of diagnostic referential levels (quantity of the exposure of a patient) within the radiographic examination process as well. For this purpose, several types of x-ray units, equipped with surface kerma indicators, have been used, they are installed at the Trauma Hospital of Brno, at the Faculty Hospital Brno and at the Masaryk Memorial Cancer Institute in Brno.
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Measurement of laser beams parameters
Vrábel, Miroslav ; Kvíčala,, Radek (referee) ; Hudcová, Lucie (advisor)
his paper discusses the characteristics of laser radiation. Introduces the theory and in quite a description of the laser beam. To this end, experiments were compiled to measure the geometric and performance parameters, polarization and coherence. Emphasis is placed on the interdependence of the various parameters of laser radiation
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DC-DC converter for matrix controller system for LED
Gociek, Krzysztof ; Janík, Lukáš (referee) ; Hudcová, Lucie (advisor)
This diploma thesis deals with design and subsequent realization of DC / DC converter for supply of matrix LED fields for the automotive industry. Such a converter must be able to supply a current of several Amperes and a voltage of the order of tens of Volts. Matrix headlights are currently being developed by a number of automotive companies. These headlamps allow independently to control the intensity of light incident on different objects or people who are in front of a car. In addition to the front headlamps the matrix LED lights are also used in the rear and signaling lights. Here it serves mainly to create different animations that have no function except the overall enhancement appearance of the vehicle. All of these lights need power units that will be suitable to regulate current flowing into various combinations of LEDs illuminated.
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Model of the Surface Optical Intensity Distribution in the Beam
Wintr, Aleš ; Hudcová, Lucie (referee) ; Wilfert, Otakar (advisor)
The aim of the thesis is first to describe the light beam spreading through free space and its characteristics. The theoretical part of the thesis developed programs that display models of beams. Given the parameters, theses models depict areal dispersion of optical intensity in the cross-section of beams. More specifically, I developed both a 2-dimensional and 3-dimensional model of beam depiction and a 3-dimensional model with variable angle of rotation of the beam trace. For this purpose I used the software Matlab R2007a. In the experimental part of the thesis I assembled a measurement chain and measured optical intensity of selected optical fibre. The measurement chain included laser Promax Prolite 80, optical source LED Promax Prolite 81, optic power meter Exfo 67A, collimator Thorlabs F810FC-1550 and optical fibres with various characteristics. The measured values were used to plot graphs depicting aerial dispersion of optical intensity and these graphs were compared with the theoretical computer model developed in the theoretical part of the thesis.
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Measurement and simulation of lenses and concentrators optical parameters
Filip, Martin ; Hudcová, Lucie (referee) ; Křivák, Petr (advisor)
Optics is branch, whis is deal with generation, propagating and detection of optical radiation. There is big boom of optical links in last years, thanks to originate of laser, fiber cable with low attenuation and production of semiconductor optical components. Besides fiber cables there are used also free space optics links. These links are used especially for build fast computer network between buildings, whose distance is up to 1 km. We need to know properties of used optical elements for creation this link so that we get the biggest possible gaim on a reciever detector. We are focusing on measurement of optical properities lenses, which are used for forming optical beam in free space optics link.
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