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Wyszukujesz frazę "lighting design" wg kryterium: Temat


Wyświetlanie 1-7 z 7
Tytuł:
Spectrally tunable light source based on light-emitting diodes for custom lighting solutions
Autorzy:
Burgos-Fernandez, F. J.
Vilaseca, M.
Perales, E.
Herrera-Ramirez, J. A.
Martinez-Verdu, F. M.
Pujol, J.
Powiązania:
https://bibliotekanauki.pl/articles/173803.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
solid state lighting
light-emitting diodes
CIE standard illuminants
minimization algorithm
customized lighting design
radiometry
Opis:
This study describes a novel spectral LED-based tunable light source used for customized lighting solutions, especially for the reconstruction of CIE (Commission Internationale de l'Eclairage) standard illuminants. The light source comprises 31 spectral bands ranging from 400 to 700 nm, an integrating cube and a control board with a 16-bit resolution. A minimization algorithm to calculate the weighting values for each channel was applied to reproduce illuminants with precision. The differences in spectral fitting and colorimetric parameters showed that the reconstructed spectra were comparable to the standard, especially for the D65, D50, A and E illuminants. Accurate results were also obtained for illuminants with narrow peaks such as fluorescents (F2 and F11) and a high-pressure sodium lamp (HP1). In conclusion, the developed spectral LED-based light source and the minimization algorithm are able to reproduce any CIE standard illuminants with a high spectral and colorimetric accuracy able to advance available custom lighting systems useful in the industry and other fields such as museum lighting.
Źródło:
Optica Applicata; 2016, 46, 1; 117-129
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization using chaotic neural network and its application to lighting design
Autorzy:
Nanba, R.
Hasegawa, M.
Nishita, T.
Aihara, K.
Powiązania:
https://bibliotekanauki.pl/articles/205753.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
algorytm genetyczny
denaturacja symulowana
grafika komputerowa
metoda energetyczna
model świetlny
sieć neuronowa chaotyczna
zagadnienie optymalizacji kombinatorycznej
chaotic neural networks
combinatorial optimization problem
computer graphics
genetic algorithm
lighting design
radiosity method
simulated annealing
Opis:
We have developed a chaotic neurodynamical searching method for solving the lighting design problems. The goal of this method is to design interior lighting that satisfies required illuminance distribution. We can obtain accurate illuminance distribution by using the radiosity method to calculate interreflection of lights. We formulate the lighting design problem that considers the interreflection of lights as a combinatorial optimization problem, and construct a chaotic neural network which searches the optimum solution of the lighting design problem. The calculated illuminance distribution is visualized using computer graphics. We compare this optimization method with the conventional neural network with gradient dynamics, simulated annealing, and the genetic algorithm, and clarify the effectiveness of the proposed method based on the chaotic neural network.
Źródło:
Control and Cybernetics; 2002, 31, 2; 249-269
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing the optical system with a real time lighting effect control
Autorzy:
Kubiak, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/1818249.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
lighting technology
optical systems design
luminance calculations
Opis:
In the paper, an effective way to design asymmetrical optics for a uniform vertical surface illumination was presented. Assessment of the obtained distribution of luminance (illuminance) on the illuminated surface is done almost at the same time as designing the optical system elements. Advantage of the final application of the presented method in 3D will be independence from the implementation of time-consuming simulations in order to verify the already designed optics. Understanding the method and its application is simple and intuitive. Observing the luminance distribution, created on the illuminated surface almost at the same time as its design, allows to see the effect of adding the next elements of the optical system on this distribution.
Źródło:
Opto-Electronics Review; 2020, 28, 2; 99--105
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for designing and simulating optical systems for luminaires
Autorzy:
Żagan, W.
Zalewski, S.
Słomiński, S.
Kubiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/200462.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lighting technology
optical systems design
luminance modelling
LID calculations
Opis:
This paper presents modern methods for designing optical systems for luminaires in the context of long years of light sources development. It shows that the development of technology for producing increasingly precise optical systems has led to an evolution in the construction of luminaires with increased efficacy and utilizing more efficiently the features of a specific family of light sources. Methods for designing and modelling optical systems with the use of mathematical curves as well as advanced the free-forming method are described. The paper also shows methods for modelling light sources features, especially luminance ones, designed to make precise simulation calculations required in any luminaire design process. Knowledge of luminance distributions of light sources and precise luminance distributions of optical systems for luminaires raises the design process to a very high level, enabling positive modern light source features, such as high luminance and their small dimensions, to be used consciously while minimizing negative ones, such as discomfort glare, caused by luminaires. The paper presents the results of simulation calculations and laboratory measurements for a selected case of luminaire equipped with a discharge lamp of maximum luminance exceeding 30 million cd/m2.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 739-750
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced modelling and luminance analysis of LED optical systems
Autorzy:
Słomiński, S.
Powiązania:
https://bibliotekanauki.pl/articles/200561.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lighting technology
luminance distribution
luminance modelling
LED
optical systems design
Opis:
Designing, optimizing and analyzing optical systems as part of the implementation process into production of modern luminaires require using advanced simulation and computational methods. The progressive miniaturization of LED (light emitting diode) chips and growth in maximum luminance values, achieving up to 108 cd/m2, require constructing very accurate geometries of reflector and lens systems producing complex luminous intensity distributions while reducing discomfort glare levels. Currently, the design process cannot function without advanced simulation methods. Today’s simulation methods in the lighting technology offer very good results as far as relatively large conventional light sources such as halogen lamps, metal halide lamps and high pressure sodium lamps are concerned. Unfortunately, they often fail in the case of chip-on-board LED light sources whose luminous surface dimensions are increasingly often contained inside a cube of the side length below 1mm. With the high sensitivity of such small chips and lenses with dimensions ranging from a just a few to between 10 and 20 mm, which is presented in this paper, modern luminance distribution measurement methods, luminance modelling and ray tracing methods should be used to minimize any errors arising from incorrectly projecting the design in the final physical model. Also, very importantly, focus should be directed towards reducing a chance of making a mistake while collimating the position of the light source inside the optical system. The paper presents a novel simulation calculation method enriched with an analysis of optical system sensitivity to a light source position. The results of simulation calculations are compared with the results of laboratory measurements for corresponding systems.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1107-1116
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of lighting in senior care facility design
Rola oświetlenia w projektowaniu placówek opieki dla osób starszych
Autorzy:
Jaglarz, Anna
Chrzanowski, Szymon
Powiązania:
https://bibliotekanauki.pl/articles/27312723.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
design
elderly
lighting
ergonomic lighting
biodynamic lighting
vision disorder
perception disorder
old age
projektowanie
osoba starsza
oświetlenie
oświetlenie ergonomiczne
oświetlenie biodynamiczne
zaburzenie wzroku
zaburzenie percepcji
wiek podeszły
Opis:
Shaping ergonomic lighting in spaces dedicated to seniors requires reliable knowledge from designers both in terms of health issues related to the aging of the eyesight and innovative lighting solutions. Design guidelines based on credible scientific results are also desirable. To complement the information in this field, the authors identified perceptual problems in the elderly due to the aging process of the visual system and analyzed the impact of lighting quality on the health, safety, comfort, and satisfaction of the elderly. Because eyesight deteriorates with age, older people have to deal with the effects of insufficient or inappropriate lighting. For this reason, there is a need to adapt lighting solutions to the requirements of seniors, taking into account the process of weakening of the visual system. Design strategies focused on three lighting effects were discussed: maintaining emotional balance, ensuring efficiency in everyday activities, and preventing falls. Lighting simulations were also made on selected examples of interiors in the senior care facility. They provided the basis for the analysis, comparison and evaluation of various lighting solutions and the development of conclusions and guidelines for multidirectional lighting strategies based on visualized design problems.
Kształtowanie ergonomicznego oświetlenia w przestrzeniach przeznaczonych dla seniorów wymaga od projektantów rzetelnej wiedzy zarówno w zakresie problematyki zdrowotnej związanej ze starzeniem się wzroku, jak i innowacyjnych rozwiązań oświetleniowych. Pożądane są również wytyczne projektowe oparte na wiarygodnych wynikach badań naukowych. Aby uzupełnić informacje w tej dziedzinie, autorzy rozpoznali problemy percepcyjne osób w podeszłym wieku wynikające z procesu starzenia się układu wzrokowego oraz przeanalizowali jakość oświetlenia w kontekście wpływu na zdrowie, bezpieczeństwo, komfort i satysfakcję osób starszych. Ponieważ wzrok pogarsza się wraz z wiekiem, osoby starsze muszą radzić sobie ze skutkami niedostatecznego lub niewłaściwego oświetlenia. Z tego względu pojawia się potrzeba dostosowania rozwiązań oświetleniowych do wymagań seniorów z uwzględnieniem procesu osłabiania się układu wzrokowego. Omówione zostały strategie projektowe ukierunkowane na trzy efekty, jakie można uzyskać dzięki odpowiedniemu oświetleniu (utrzymanie równowagi emocjonalnej, zapewnienie wydajności i sprawności w codziennych działaniach oraz zapobieganie upadkom). Przeprowadzono również symulacje oświetlenia na wybranych przykładach wnętrz w domu opieki dla seniorów. Dały one podstawę do analizy, porównania i oceny różnych rozwiązań oświetleniowych oraz opracowania wniosków i wytycznych do tworzenia wielokierunkowych strategii oświetleniowych opartych na zwizualizowanych problemach projektowych.
Źródło:
Architectus; 2023, 2 (74); 87--96
1429-7507
2084-5227
Pojawia się w:
Architectus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floodlighting luminaire for homogeneous illumination
Autorzy:
Kubiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/115666.pdf
Data publikacji:
2015
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
lighting technology
illumination
floodlighting
luminaires
luminaire design
technologia oświetleniowa
oświetlenie
iluminacja
oprawy oświetleniowe
projektowanie opraw
Opis:
The main subject of the research is a proposition of a luminaire optical system which allows us to illuminate building facades in a more uniform way than it is today in the case when luminaire location is close and asymmetric to the illuminated object. Firstly, the paper introduces and explains the term of floodlighting and presents luminaires that are used in floodlighting. The author casts doubt on floodlighting luminaires quality especially related to luminous intensity distributions. Certain problems arising from illuminating objects by using improper luminaires are presented and discussed. As an attempt to improve the situation, the author shows his innovative concept of the luminaire optical system. Finally, to verify the proposed luminaire optics, the author has made a comparison of his conception with two other luminaires.
Źródło:
Challenges of Modern Technology; 2015, 6, 1; 6-10
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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