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A light source with variable intensity
Koždoň, Jakub ; Mojrová, Barbora (referee) ; Boušek, Jaroslav (advisor)
This work is focused on description how the light impact human live, description of light sources and finally design and construction of light source with adjustable colour temperature and luminous flux. In introduction is mentioned the process of vision and how the light impact humans. In next part is characterization of currently used light sources, their construction, properties, benefits and drawback with their main parameters. Important part of this chapter is more extensive description of light emitting diodes with their operational parameters. The last two parts is focused on design and measuring the parameters of created light source with adjustable colour temperature and luminous flux and evaluating the results.
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Operating parameters of LED light sources
Janík, Daniel ; Mikulka, Jan (referee) ; Havlíková, Marie (advisor)
The aim of the thesis is to introduce the basic photometric quantities and operating parameters of LED light sources, according to which the light sources are evaluated and compared. The thesis examines effects of high temperature and elevated stress on LED retrofits and a design of measurement methods to measure these influences. According to the proposed methods, nine samples of light sources were measured and compared to each other on a basis of the measurements. Comparison was made from the point of view of the energy as well as the quality of the produced light. The results were also compared to the parameters specified by the producers.
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Photobiological safety of light sources and lighting systems
Štěpánek, Jaroslav ; Krbal, Michal (referee) ; Škoda, Jan (advisor)
The thesis deals with the problems of the photobiological lamp and lamps systems safety. It is divided into theoretical and practical parts. The theoretical part touches the basic knowledge concerning the eye and vision, eye and skin diseases caused by excessive exposure to non-ionizing radiation. And besides that there are described the sources of light causing the possible exposure and further more it includes the methodology of measurement and evaluation of photobiological safety. The practical part investigates a measurement of the spectrum of light sources. The measured data are evaluated according to the methods mentioned in the theoretical part.
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Analysis of Electric Power Consumption of Public Lighting
Varmuža, Jan ; Pavelka, Tomáš (referee) ; Paar, Martin (advisor)
The thesis deals with analysis of the public lighting system from the point of view of light sources and luminaries. It focuses on the specifics of the lighting systems such as lighting for pedestrian crossings or decorative lighting. It analyzes the energy consumption depending on daylight and how it manifests a shift sunrise and sunset on the consumption of electricity. The work clarifies how the model can be simplified sunrise, sunset for the entire Czech Republic. Based on the distribution of municipalities with population over 10,000 and modeling of sunrise and sunset calculation is carried out power consumption of lighting systems and compared to the total consumption of the Czech Republic. Simplification is an estimate of the consumption of electricity to villages to 10 000 people on the basis of the estimate, the final consumption of electricity for public lighting for the entire Czech Republic.
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Combining the light of two sources in the integration sphere
Mellová, Katarína ; Šicner, Michal (referee) ; Dostál, Zbyněk (advisor)
For the development of the new generation of the controlled holographic microscope, is necessary to design a new fluorescence module. The work discusses the basic principles and application of fluorescence microscopy, including a description of the holographic microscope. Searching for available light sources used in fluorescence microscopy is performed and evaluated. The designed source combines radiation with selected excitation wavelengths using an integrating sphere, which also has a homogenizing effect. This innovative design ensures a quick and efficient change of excitation wavelengths due to the fluorophore used and the possibility of a direct connection of the source to the microscope. In order to choose a suitable arrangement for the source, three conceptual designs of its function are proposed. The selected designs were verified by simulation and suitable optical components were selected. The resulting construction is tested.
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Design of a reference luminaire
Cikryt, Adam ; Baxant, Petr (referee) ; Škoda, Jan (advisor)
The master's thesis deals with the design and manufacturing of a reference luminaire for use in lighting laboratories. In the design of the luminaire, simulations in Ansys Speos are used to assess the luminaire's lighting properties. The designed luminaire is manufactured using 3D printing and assembled. The light technical properties of the luminaire are determined by measurements in lighting laboratories.
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Analysis of luminance analyser LDA - LumiDISP application for correlated color temperature measurement
Vlček, Pavel ; Škoda, Jan (referee) ; Motyčka, Martin (advisor)
This master's thesis deals with the search of commercially available luminance analysers and cameras that use the measurement of correlated colour temperature. It also deals with calculations of correlated colour temperature according to various available methods. The luminance analyser LDA-LumiDISP is based on a DSLR camera. The principle of its operation and possible errors in capturing pictures are discussed here. The work deals with extensive testing of the LDA-LumiDISP luminance analyser, which is primarily intended for measuring luminance in the set scene, but can also be used to measure the correlated colour temperature. The device is being tested in terms of measuring the correlated colour temperature in laboratory and field conditions. The result of the master's thesis is the calculation of measurements uncertainty for certain light sources and the optimization of the measuring algorithm to reduce them.
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Design solitérního svítidla
Sendlerová, Zuzana
This dissertation discusses problematics of illumination. Based on its findings, it aims to design a solitaire interior lighting. This dissertation is divided into two main parts. Firstly, the theoretical part describes light fundamental photometric and electronic parameters; looks into influence of light on human beings and summarize artificial illumination from the historic point of view. Moreover, It looks closely into perception of light in interior, its relationship to space and describes the most important principles of illumination. Furthermore, it lists different light sources and their division based on their use. The second part includes practical steps of a light designing. It contains research, elements of inspiration, sketches, and different variants of design, construction and material solution, visualization of final proposal and showing of manufacturing process.
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