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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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Placement Optimization of Projector Lens
Bezděk, Matěj ; Važík, Jiří (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with the creation of engineering design of holder of projector lens. The thesis is created in cooperation with department of development in Varroc Lighting Systems, s.r.o. Initial part provides a brief description of the development of lighting technology used in car´s headlamps. The following part describes solutions currently used in clamping the lens in holder. The main part of the thesis focuses on the design of holder of projector lens itself. Projector lenses testing provide critical values of cohesive failure of the lens material, which cannot be exceed during the process of lens fitting and its subsequent clamping. In the final part the engineering design is verified and optimized using finite element analysis.
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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 LED lamp set
Slívová, Marta ; Kobosil, Karel (referee) ; Křenek, Ladislav (advisor)
This master thesis is a design study of LED interior light units. Aim of the study is to design set of three luminaire types – office table light, standard lamp and a pendant luminaire. All three lights are following the same design. Curve is the main shape for this light set. LED, called light source of the future, is supposed to be the only light source at all three units. LEDs were chosen as the contemporary most efficient and modern light source. Use of LEDs has many positive economical and social aspects. Use of innovative design, most recent technologies and modern shapes brings new inspiration and variety into current interior light world. Development of light systems study is mapping light units history from the beginning into presence. It brings interesting look into interior light history.
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Comparison of Light Parameters of Different Light Sources of Vehicles' Headlamps
Suchomel, Filip ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
This thesis is focused on comparison of parameters of light sources (halogen, xenon, LED) installed in Skoda Octavia 3rd generation. The opening part solves analysis of the current state of lighting technology and its impact on traffic safety. The next part is focused on general parameters of light, construction of light sources, optical systems and adaptation of the human eye to various light conditions, especially contrast. The practical part is focused on comparing the contrast values of individual light sources in relation to the dark and lightly dressed pedestrian in the area without artificial lighting.
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Effect of Light Source Position on Operating Parameters
Múdry, Peter ; Krbal, Michal (referee) ; Baxant, Petr (advisor)
The main task of this bachelor’s thesis is to find out, how does the working position of light source influence the lighting parameters of light source and possibly other closely related variables as temperature of light source etc. Purpose of this work is to measure luminous flux of some selected light sources’, where significant influence on luminous flux caused by working position of source can be expected and to process measured results. This work processes: lighting parameters of light sources’, theoretical information about influence of temperature and position on operating parameters of light sources, optimal working conditions of light sources and deals with electrical discharge in lightings.
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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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