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The modulation techniques used in WDM optical networks
Lučenič, Lukáš ; Filka, Miloslav (referee) ; Kočí, Lukáš (advisor)
The main goal of the diploma thesis is DWDM simulation of optical network, defined by recommandation ITU-T. Optical network includes 16 communication channels with length of fiber 50 km. Each channel have to be set with bandwith 50GHz and Bit rate with minimal value 10Gbit/s. The final simulation model includes 8 types of modulation techniques. The result of the thesis is comparison modulation techniques in terms of usability of bandwith and comparison of the quality of transfer
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A Virtual Instrument for Measurement of Flicker
Cabala, Ľuboš ; Bok, Jaromír (referee) ; Šlezingr, Jan (advisor)
This thesis deals with the voltage fluctuation, its causes, resourses and affections on light sources. Further the posibbilities of the voltage fluctuations limitation are mentioned. This thesis also contains the decriptions of construction of UIE/EIC flickermeter on which bases the virtual flickermeter is programmed in the LabVIEW.
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Adjustable home light source
Tkáčová, Denisa ; Kaczmarczyk, Václav (referee) ; Streit, Jakub (advisor)
This bachelor thesis is dealing with creation and construction of adjustable light source module that has controllable color and brightness. The module has built in sensors providing autonomous control and adaptable behaviour which depends on presence of a user in front of module. User interface is also included, which displays current statistics of lighting condition.
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Measurement of photometric parameters of light sources for interactive panel
Vágner, Richard ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
This bachelor thesis deals with measurment of various photometric parameters of light sources designated for interactive board located in the Laboratory of Light VUT FEKT. There is described procedure and processing of photometric and electrical parameters of light sources (incandescent light bulbs, halogen lamps, compact fluorescent lamps, fluorescent tubes and LED lamps). Also there is presented processing method of designing cards that will contain mentioned parameters.
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The effect of the blue light on the human body
Dvořák, Petr ; Krbal, Michal (referee) ; Štěpánek, Jaroslav (advisor)
This thesis explains the term „blue light“. It deals with the sources of blue light and the effects of this type of electromagnetic radiance on human body. The focus is concentrate especially on problems, which are evocated of blue light. The biggest danger is the desynchronization of circadian rhythm and photochemical damage of retina – photoretinitis („blue light hazard“). The basic principles of biological processes and the visual system are described here. These processes are controlled by properties of incident light onto the retina of eye. The basic information about artificial sources of blue light commonly used in households and in industry are mentioned in the second half of work. These light sources were measured and elaborated. The electromagnetic spectrums of sources are portrayed and there is a comparison of sources due circadian effect too.
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Realistic Rendering of a Building with Varying Lighting Conditions
Navrátil, Jan ; Seeman, Michal (referee) ; Herout, Adam (advisor)
This paper is focused on realistic rendering of interior environments with varying lighting conditions. It proposes methods of setting properties of light sources to achieve a specific scene appearence. It mainly works with light comming from a sky and sun to the scene and describes this light in relation to weather conditions, time of day and overcast factor. The goal is creating easily configurable system in which a single parameter change leads to significant change of lighting conditions. All these changes should be presented in a short video.
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Phototherapy
Joklík, Vojtěch ; Škoda, Jan (referee) ; Štěpánek, Jaroslav (advisor)
This thesis describes relationship between human body and light. It is focused on perception of light with human eye, skin and their reaction to incident light and its intensity. Then it contains short description of Icterus Neonatorum (yellow-gum), Constitutional Dermatitis, Lepriasis and their treatment. It is followed by description of various sources of light, their use in medicine and reaction of body to them. This work includes measurements and evaluation of five sources of light.
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Simulator of solar light for the solar cells testing
Palla, Martin ; Solčanský, Marek (referee) ; Vaněk, Jiří (advisor)
The first part deals with an introduction to the basic fundamentals and presentation of theory from the assignment. The fundamentals are presented and described in detail. This part is followed by chapter describing possibilities of using solar energy. The paper presents possibilities of using both direct and diffuse solar radiation. The last chapter of the theoretical part is devoted to the basic description of the IEC 60904 and IEC 60904-9 standards. The practical part presents selected solar simulators and their measurement. Classification class according to IEC 60904-9 is determined from this measurement. The last part of the work is devoted to the construction of a solar simulator composed of LEDs. The simulator is then measured and its class is determined by emitted spectrum.
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Automatic evaluation of the solar spectrum
Vlček, Josef ; Křivík, Petr (referee) ; Špinka, Jiří (advisor)
This master’s thesis deals with properties of a solar radiation, measurement of a solar spectrum and standard IEC 60904-9, which defines the requirements for a solar simulator. Solar simulators are classified as A, B or C for each of the three categories based on criteria of spectral distribution match, irradiance non-uniformity on the test plane and temporal instability. The goal of this thesis was creation software for automatic evaluation of a solar spectrum. Software was created in Matlab application and its function is to determine class of solar spectral match with spectrum AM1.5. The last part contains a measurement of various solar sources and using the created software was determined its spectral match with spectrum AM1.5.
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The measurement of melanopic quantities in indoor spaces with the luminance analyser LDA - LumiDISP
Siegel, Josef ; Baxant, Petr (referee) ; Motyčka, Martin (advisor)
This thesis focuses on measuring melanopic quantities in indoor spaces and their impact on individuals and their circadian rhythms. Melanopic quantities are specific parameters of light that influence biological responses and physiological processes in our bodies. To measure these quantities, a photometric analyzer is utilized, enabling the quantification of spectral components of light. It also evaluates the melanopic contributions of various lighting sources, such as LED fixtures, incandescent bulbs, or natural daylight.
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