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Luminaires and Applications with Power LEDs
Vaňko, Adam ; Pavelka, Tomáš (referee) ; Baxant, Petr (advisor)
Progress in development of modern LEDs, their long lifetime and high luminous efficacy predetermine them for usage in lighting systems. This master's thesis examines possibilities of application of LEDs in luminaires, parameters of diodes and problems, which can appear in construction of luminaire with LED lighting source. In the practical part of this thesis a luminaire is designed, capable of illuminating traffic signs, vertical surfaces, billboards and fasades. By standards required parameters of a lighting system and adaptability of application must be considered in complex predesign. Simulations of lighting scene, created in special computer software, measurements of optical point’s parameters and construction of real luminaire model using high quality CREE LEDs, are included in analysis of the problem. Parameters of the luminaire were proved by measurements of product’s attributes at light laboratory. There are also some suggestions for improvement and further development of the product.
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Design of lighting system in high school
Borůvka, Jan ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
The theoretical part is focused on lights, notions and calculations in the area of light technology, basic lightning sources and lamps. This work is also about the principle of lightning measuring. The main aim of the work is design of a new artificial lightning system in a High school agriculture in Prerov. At first, the control measuring of existing lightning was done which is mentioned in this work. From the results of control measuring is clear, that existing lighting system in classroom does not suit requirements, which are mentioned in the valid technical norm. Design of a new lightning system meets the requirements in all of the rooms in the building of school. Design of lightning system was done in two variants. The first variant uses lamps with fluorescent tube light sources. The second variant uses lamps with LED light sources. Also is here evaluated financial difficulty of possible installation and comparation of each variants with respect energetic difficulty.
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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 of lighting system in car service
Borůvka, Jan ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
The theoretical part is focused on lights, notions and calculations in the area of light technology, basic lightning sources and lamps. This work is also about the principle of lightning measuring. The main aim of the work is design of a new artificial lightning system in a workshop which is located in village called Petrov. At first, the control measuring of existing lightning was done which is mentioned in this work.
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Light sources in extreme operational conditions
Martiš, Jan ; Krbal, Michal (referee) ; Pavelka, Tomáš (advisor)
The purpose of this work is to inform about how various external influences can affect the operational characteristics of light sources. In the first part of the work, the light sources are categorized based on their principle of operation and the basic parameters and properties of different light source types are listed. Then the individual influences (voltage changes, temperature, operational position) and their possible effect on the operational characteristics of different types of light sources are analysed. Further, possible procedures for measuring light sources under altered conditions are mentioned and the results of practical measurements on selected light sources are presented. The last part of the work deals with ways to decrease the influence of altered operating conditions on the operation of light sources.
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Let There Be Light? Impact of Light Pollution on the Environment
Svoboda, Lukáš ; Mihai, Hana (referee) ; Ellederová, Eva (advisor)
Světelné znečištění patří mezi mnoho druhů znečištění, které ohrožují naši planetu. Důvod jeho vzniku je vedlejší efekt průmyslové civilizace a jeho negativní dopad ohrožuje lidské zdraví, zvěř, rostlinstvo a klima. Cílem této bakalářské práce je vymezit koncept světelného znečištění, popsat způsoby měření a negativní dopady. Teoretická část bakalářské práce se zabývá definováním pojmu světelného znečištění a popisuje způsoby, jakými se světelné znečištění projevuje. Dále řeší možnosti měření světelného znečištění, a také diskutuje negativními dopady na lidské zdraví, přírodu, ekonomiku, bezpečnost a astronomii. Navazující kapitola popisuje parametry běžně užívaných světelných zdrojů pro veřejné osvětlení, a nakonec jsou probírány základní praktiky, které napomáhají snížit světelné znečištění a jsou doplněny příklady správně navrženými svítidly pro venkovní osvětlení. Praktická část této bakalářské práce se zabývá kvantitativním výzkumem, který měl za cíl objasnit úroveň povědomí o světelném znečištění mezi širokou veřejností. Data pro tento výzkum byla shromážděna pomocí dotazníkového šetření.
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Economic comparison of light sources
Růžička, Josef ; Motyčka, Martin (referee) ; Štěpánek, Jaroslav (advisor)
This bachelor thesis deals with the economic comparison of light sources. On the market there is currently no physical quantity that would enable the light sources to be compared from an economic point of view in long-term perspective. The main objective of the work is, therefore, by calculations of the specified (or directly measured) parameters of the light source to provide a uniform total cost of lighting, thanks to which it will then be possible to sort the sources according to the price benefit. Evaluation is based on measurements of 28 light sources from different groups: the classical bulbs, halogen bulbs, compact fluorescent bulbs, compact LED retrofits and dimmable LED retrofits with color-changeable modes. These light sources are meant to be used for indoor home lighting, offices, halls, etc. The final part of the paper clarifies what kind of light sources and for what reasons they are the most profitable and have the greatest potential for the future. There's also a comparison of theoretical parameters provided by the manufacturer, and parameters directly measured in the laboratory and the evaluation of the deviations between them. The use of this thesis comes from provision of the calculation structure to a user who will better understand the topic of costs while purchasing the light source. Well arranged description and information about the light sources in theoretical part of the thesis is another utility to be mentioned.
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Graphics Intro 64kB Using Ray Tracing
Dočkal, Jiří ; Chudý, Peter (referee) ; Herout, Adam (advisor)
This thesis is concerned with the description of the aplication which was determined by the assignment of the bachelor thesis. The main focus are the problems and principles connected with the topic of the thesis. Further on, the thesis describes the actual realization of the aplication and the achieved results. The conclusion covers the evaluation of thesis and possible ways for further improvement of the project.
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Measurement of Discharge Light Sources Parameters
Štěpánek, Jaroslav ; Krbal, Michal (referee) ; Baxant, Petr (advisor)
The aim of my bachelor’s thesis is to provide a summary about discharge lights sources. It deals with their light and electric qualities. The work is divided into theoretical and practical part. The theoretical part pays attention to the construction of light sources; it provides information about photometric parameters and explores the connections the light sources into the power network. It describes the discharge lamp subtypes and subcategories. In practical part the quality of light sources is measured and the following results of measurement are evaluated.
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