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Numerical Modelling of the Light Source
Pavelka, Adam ; Koňas,, Petr (referee) ; Kadlec, Radim (advisor)
The master’s thesis deals with photometry units used in light engineering. There are defined the methods of modelling the illumination systems, their advantages, disadvantages and possibilities of using. Furthermore, the thesis deals with modelling of two illumination systems by ray-tracing in programming environment of MATLAB. The master’s thesis describes the analysis of the problem and the program designing process. Acquired model results are then compared with the real measurements of both illumination systems which allow the discussion of the results and the deviations of the models.
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The effect of operating position of the light source on the photometric parameters
Šťastný, Jakub ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
The theses discusses how operating position and ambient temperature affect electric light sources. For the purposes of this theses, the analysis of light radiation, the description and the principle of taking measurements of light quantities are included. The work also contains the principle of function, construction and parameters of light sources. For each light source a hypothesized impact of the operating position of the light source and the impact of ambient temperature variation on radiated luminous flux are stated. For selected light sources a measurement of the impact of the operating position on the sources’ photometric parameters was taken. The output measurement data are being compared to the theoretical hypotheses. The conclusion of the thesis describes suggested recommendations for the operation of light sources based on both theoretical and practical parts of the thesis.
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Measuring of parameters dimmable LED sources
Kubeša, Radek ; Štěpánek, Jaroslav (referee) ; Baxant, Petr (advisor)
The bachelor thesis deals with the dimmable LED light sources. The theoretical part at the beginning is devoted to the light and the basic photometric quantities, analyzes the light sources and their parametres. It also describes the operating principle of LEDs, construction, power, and control the brightness of LED light sources. The practical part is focused on the measurement and evaluation of operating parameters selected samples of LED light sources.
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Technology of pouring LED strips with epoxy materials
Rudy, Veronika ; Krejčí, Miroslav (referee) ; Píška, Miroslav (advisor)
The thesis deals with the pouring of epoxy materials over LED strips. The research part contains an introduction to photometry and summarizes the types of potting compounds along with their characteristics. The practical part delves into the effect different amount of pigment has on the photometric properties. This is assessed based on verified measurements performed with the help of a goniophotometer on samples with different amounts of pigment, which were created using an integration sphere. Furthermore, a brightness analysis and a long-term outdoor test were performed.
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Measurement of Operational Parameters of Light Sources
Motyčka, Martin ; Pavelka, Tomáš (referee) ; Krbal, Michal (advisor)
This semestral thesis is focused on description of operating parameters of light sources and their measurements. There are descripted light-technical, electrical and other parameters of light sources and methods of their measurements and evaluations. In tables there are ranges of fotometric quantities for most types of light sources. This thesis is also focused on functional explanation of photometric measuring instruments.
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Luminaire position influence on measured parameters in integrating sphere.
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This bachelor thesis deals with the influence of the position of luminaires with narrow radiation characteristics when measured in the integrating sphere. The basic light technical parameters are summarized here. Especially, luminous flux, illuminance, solid angle, luminous intesity and luminance, followed by colour temperature and general colour rendering index. This thesis also deals with the measuring instruments, at first with the basic element, which is the photoelement and then with the following instruments: the illuminance meter, the luminance meter, the spectroradiometer, the goniophotometer and the integrating sphere. The thesis is summarization of the basic information about luminaires. This theory is followed by a laboratory measurement that deals with the measurement of luminaires on a goniophotometer and in the integrating sphere. Goniophotometer measurements are important in conditions of acquire accurate luminous flux. The luminous flux from the goniophotometer is compared with the single measured values in the set positions when measured in the integrating sphere. As a result, the position of the luminaire in the integrating sphere is influenced
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Reverse calculation of the luminous intensity curves of street lighting luminaires
Knápková, Dagmar ; Baxant, Petr (referee) ; Škoda, Jan (advisor)
This master´s thesis deals with the reverse calculation of luminous curves for roads according to ČSN EN 13201. The thesis is divided into the theoretical and the practical part. The theoretical part describes the basic requirements and procedures for calculating the luminous curves. The practical part describes the program, created in the Matlab environment, which is designed for the practical calculation of the ideal luminous curve, for each situation given by the user. Further particular example of the calculation is given.
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Light Sources
Janík, Daniel ; Bejček, Ludvík (referee) ; Havlíková, Marie (advisor)
The aim of the thesis is to introduce the basic photometric quantities and measurement of these quantities. Next target is to get acquainted with the basic types of light sources, including various types, their construction and principle of their function. The work also deals with the measurement of electrical and photometric parameters of nine samples of concrete light sources. Measured sources in terms of energy and terms of quality of the light are compared with each other and with the data supplied by the producer.
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Operating Characteristics of LED Sources
Brdečko, Aleš ; Diviš, Daniel (referee) ; Baxant, Petr (advisor)
This semester thesis is dealing with issues of LED (light emiting diod).In the text we can find general summary knowledges about LED, relating their history, construction, principle of working and also treatise about of semiconductor compounds. In thesis are given examples of use indicating their advantages and disadvantages and indicating their parameters. The practical content of this thesis is evaluation of measurement performed on some samples of LED especially graphics addiction of crosses and V-A characteristics measured in addiction on current.
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Design svítidla
Vacková, Romana
The content of this thesis is the design of table lamp made of wood material using LED technology in this light. The theoretical part contain basic information on lighting history and subsequently function of LED strips, their strengths, power options, colouring and the method of installation. It was necessary to survey contemporary table lights on the market before own design. In the area own design it is described the procedure in the design which is accompanied by pictures of sketches, 3D models and test models. The final design is presented in 3D visualization.
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