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Use of Luminance Analyser for the Quantification of Artificial Light at Night
Novák, Filip ; Motyčka, Martin (referee) ; Baxant, Petr (advisor)
This diploma thesis deals with obtrusive light and its measurement, especially with the help of luminance analyzers. In particular, the necessary theoretical basis for the design of a measuring methodology for obtrusive light or veil brightness of the sky is laid here. This mainly includes the division of obtrusive light and its manifestations, a description of the effects of obtrusive light on the environment, selected organisms and the human body. Also described herein are the biological mechanisms of the human body that are affected by light as such. Attention is also paid to streetlights, its classification and methods of reducing obtrusive light, as well as methods of measuring brightness and brightness analyzers. Last but not least, the night sky is also measured using the LumiDISP luminance analyzer and subsequent data are evaluated using the proposed method.
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Light pollution around Vlašim
Černíková, Veronika ; Matějček, Tomáš (advisor) ; Kocourek, David (referee)
This work is focused on the measurement of light pollution in the vicinity of the central Bohemian city of Vlašim. The research part is devoted to familiarization with the issue of light pollution. Different types of artificial light sources are discussed, the impact on humans and ecosystems is mentioned. The Sky Quality Meter was used to measure the brightness of the sky at 11 locations around Vlašim. Measurements at each site were made to 8 cardinal directions and at three different heights above the horizon. The measurement results were combined with visual observation and the largest sources of light pollution in the area were identified, which include the industrial area in the southeast of the city, the arms store Sellier & Bellot, a.s. and the Sapeli door store. Key words Light pollution, sky brightness, obtrusive light, public lighting, Vlašim
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Use of Luminance Analyser for the Quantification of Artificial Light at Night
Novák, Filip ; Motyčka, Martin (referee) ; Baxant, Petr (advisor)
This diploma thesis deals with obtrusive light and its measurement, especially with the help of luminance analyzers. In particular, the necessary theoretical basis for the design of a measuring methodology for obtrusive light or veil brightness of the sky is laid here. This mainly includes the division of obtrusive light and its manifestations, a description of the effects of obtrusive light on the environment, selected organisms and the human body. Also described herein are the biological mechanisms of the human body that are affected by light as such. Attention is also paid to streetlights, its classification and methods of reducing obtrusive light, as well as methods of measuring brightness and brightness analyzers. Last but not least, the night sky is also measured using the LumiDISP luminance analyzer and subsequent data are evaluated using the proposed method.
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Komplexní řešení veřejného osvětlení
Žák, Petr ; Švecová, Simona
Public lighting as well as every technical infrastructure has got its own lifetime, so the periodic renovation is needed. Public lighting in the Czech Republic was built during the 70´s of the last century and regular renovations were done only in larger cities. In small cities and villages, the public lighting systems are almost at the end of their life time and it is necessary to make the overall reconstruction. For a long time, relatively a little attention was paid to public lighting. The situation was changed in the last few years, where thanks to the pressure to lower the energy consumption, the attention was focused also on the public lighting. Solutions of problems with energy efficiency are usually accompanied by financial instruments in the form of subsidies, grants etc. which support the change of technical equipment with low efficiency for technical equipment with high efficiency. However, in above mention steps the considerations of the overall reconstruction of public lighting is missing. With reference to situation in public lighting systems it would be appropriate to combine their energy performance solutions with overall reconstruction. Older lighting systems and unfortunately, also some new lighting systems, are not only energy inefficient but in many cases they also visually disturb public spaces by their location, design or proportions. In addition, they are the sources of obtrusive light too. Public spaces are important part of human settlements and the scale of life quality. The light is an instrument for creating environment with regards to many aspects (cultural, historical, functional, etc.) of urban areas. It is necessary to perceive public lighting comprehensively taking into account not only the traffic safety and energy consumption but also architectural-urban aspects and aspects connected with minimizing of obtrusive light.
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