Wyniki wyszukiwania - BazTech

1

Digital luminance photometry in the context of the human visual system

Słomiński Sebastian

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2022

|

Vol. 70, nr 5

art. no. e143103

EN

Almost all solutions in modern lighting systems are based on LED technology. Luminance and obvious ease of control are the key characteristics of this light source. At the same time, luminances at the level of 108 cd/m2 are a significant advantage of LED in design applications, where high luminous intensity amplification is important. However, in general and in road lighting applications, LED luminaires represent a source of potential discomfort glare. Unfortunately, lighting technology’s metrology lags behind LED parameter development and optimization. The results of luminance measurements of the same luminaires, made with a luminance camera and meters with a measuring field, differ. The differences even appear for the same imaging luminance measuring devices with different lenses. This article presents the results of experiments and detailed analyzes related to modern digital luminance photometry based on the use of digital image sensors. Luminance tests were conducted on multi-source research models of luminaires. Traditional luminance measuring equipment with a measuring field was used in the experiment. The research was also supplemented with the measurements made using CCD/CMOS luminance cameras with selected components where the angular field of view of each pixel was a 0.45 min arc corresponding to the highest average human sight parameters. The results confirm that the average luminance value for multi-source luminaires depends on the measurement system configuration. It has been proposed to standardize the angular field of view parameters of all measurement systems, where the measurement aims to obtain a value that directly relates to human visual impressions (e.g. glare).

2

Analysis of residential lighting in Poland: results from a winter term survey

Pracki Piotr, Aslanoglu Rengin, Kazak Jan K., Ulusoy Begüm, Yekanialibeiglou Sepideh

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2022

|

Vol. 70, nr 6

art. no. e143107

EN

In 2020, an international project on residential lighting started and was implemented in four countries (Poland, Sweden, UK and Turkey). This article presents the results of a survey carried out in Poland, in the winter term between November 2020 and January 2021. A total of 125 Polish residents (59 women, 65 men, one person did not wish to specify gender) participated in the survey. A variety of data was collected on the respondents and their assessments as well as on their satisfaction with day- and artificial lighting in residential living spaces. The results from questionnaires were analyzed with STATISTICA 13.3. Descriptive statistics and Spearman rank order correlations were adopted to identify the light-related aspects, lighting patterns, and respondents’ perception of day- and artificial lighting conditions in living areas. The results revealed that satisfaction with daylighting in the living area, both in summer and winter, was significantly correlated with daylighting level, daylighting uniformity, sunlight exposure and view-out. The results also revealed that satisfaction with artificial lighting was significantly correlated with artificial lighting level, artificial lighting uniformity and color rendering. The results provide valuable information on lighting and factors that influence the luminous environment in residential living spaces.

3

Concept and implementation of H-V goniophotometer for fast measurement of luminous intensity distribution in C-γ system

Legierski Marcin, Michałek Piotr

Przegląd Elektrotechniczny

|

2020

|

R. 96, nr 8

75--78

EN

This article presents on-the-fly goniophotometer for fast luminous intensity measurements both in C-γ system and in H-V geometry realized in BOSMAL Automotive Research and Development Institute Ltd. Technical parameters achieved were compared with classic goniophotometer and commercially available solutions on the market. The factors affecting the accuracy of the measurement were analysed, obtained photometric data were validated.

PL

Artykuł opisuje goniofotometr do szybkich pomiarów rozsyłu światłości w systemie C-γ i geometrii H-V opracowany w Instytucie Badań i Rozwoju Motoryzacji BOSMAL Sp z o.o.. Osiągnięte parametry techniczne odniesiono do klasycznego goniofotometru oraz zestawiano z osiągami komercyjnych rozwiązań dostępnych na rynku. Przeprowadzono analizę czynników wpływających na dokładność pomiaru oraz walidacje uzyskanych wielkości fotometrycznych.

4

A comparison of the calculations and measurements for a lighting design of the same room

Skarżyński Krzysztof, Rutkowska Anna

Przegląd Elektrotechniczny

|

2020

|

R. 96, nr 11

11--14

EN

This work presents a comparative analysis of the results of the lighting parameters (average illuminance and uniformity in the task area) obtained as a result of a computer simulation carried out using DIALux 4.13, and the lighting measurements made using a professional illuminance meter in real circumstances, for the same simple office room. Issues such as the assumption of the proper reflectance values of the main areas, the discretization of photometric .ies file and the influence of the room furnishings on the simulation and measurement results were carefully analyzed. This research allows us to emphasize that the accuracy of the representation of reality by means of a computer simulation of a lighting design using DIALux 4.13 is high, and largely depends on the knowledge, reliability and experience of the lighting designer.

PL

W tej pracy wykonano analizę porównawczą wyników parametrów świetlnych (średniego natężenia oświetlenia i równomierność oświetlenia w polu zadania), uzyskanych w wyniku symulacji przeprowadzonej w programie DIALux 4.13 oraz pomiarów oświetlenia wykonanych za pomocą luksomierza w rzeczywistości, dla tego samego prostego pomieszczenia biurowego. Analizie poddano również kwestie przyjęcia odpowiednich wartości współczynników odbicia głównych powierzchni, próbkowanie pliku fotometrycznego, jak również wpływ wyposażenia pomieszczenia na uzyskane wyniki. Przeprowadzone badania pozwoliły podkreślić, że dokładność odwzorowania rzeczywistości poprzez komputerową symulację oświetlenia w programie DIALux 4.13 jest wysoka i dużym stopniu zależy od wiedzy, rzetelności i doświadczenia osoby projektującej oświetlenie.

5

Designing the optical system with a real time lighting effect control

Kubiak Kamil

Opto-Electronics Review

|

2020

|

Vol. 28, No. 2

99--105

EN

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.

6

Analysis of selected parameters of compact fluorescent lamps during their long-term operation

Tabaka Przemyslaw, Rózga Paweł

Metrology and Measurement Systems

|

2020

|

Vol. 27, nr 3

541--557

EN

This article is focused on considerations based on experimental studies concerning changes of selected parameters of identical compact fluorescent lamps (CFLs) intended for use in buildings during their operation. The studies constituted a long-term experiment whose goal was an evaluation of selected operating parameters of the CFLs in terms of meeting the requirements set out in the specified regulations as well as the issue of marking the lamps with the energy efficiency class. The measurements were performed with the authors’ experimental setup consisting of original equipment designed and made especially for the purpose of the measurements. The studies covered registration of the luminous flux as well as selected electrical parameters such as active power, current and the power factor during the so-called “start-up time” and operation time equal to 100 h, 500 h, 1000 h, 2000 h, etc. with a 1000 h step. The studies were finished with the moment of natural burnout of the CFLs tested. The results showed that the biggest drawback of CFLs is lack of preservation of the required time to reach 60% of the stabilized luminous flux just after short time of lamp operation. Similarly when assessing the conformity of the parameters declared by the manufacturer that have been verified, it can be stated that they are true only at the initial stage of lamp operation.

7

Ocena możliwości zastosowania organicznych diod świecących do oświetlenia wnętrz

Żerańska Ewa, Pracki Piotr

Elektronika : konstrukcje, technologie, zastosowania

|

2020

|

Vol. 61, nr 6

4--10

PL

W artykule przedstawiono wybrane zagadnienia dotyczące organicznych diod świecących OLED i ich wykorzystania do oświetlenia pomieszczeń. We wprowadzeniu omówiono strukturę źródeł OLED i sposób wytwarzania światła. W części praktycznej pracy, przedstawiono wyniki symulacji komputerowych parametrów oświetleniowych w ośmiu pomieszczeniach. Do oświetlenia posłużyły typowe moduły OLED, których liczbę i rozmieszczenie dobrano pod kątem uzyskania wymaganych poziomów średniego natężenia i równomierności oświetlenia pól pracy. Analizowano poziomy względnych natężeń oświetlenia sufitu i ścian, oraz cylindrycznego płaszczyzny odniesieniowej, a także mocy skorygowanej oświetlenia. Uzyskane wyniki pokazują, że zastosowanie lokowanych sufitowo modułów OLED prowadzi do stosunkowo wysokich poziomów wszystkich analizowanych względnych natężeń oświetlenia, co przekłada się na dobre nasycenie światłem pomieszczeń. Jest to efekt korzystny. Niestety, w analizowanych sytuacjach uzyskano poziomy wskaźnika olśnienia przykrego wyższe od 19 i wysokie poziomy mocy skorygowanej oświetlenia: dla siedmiu przypadków wyższe od 4 W/m² na 100 lx, a dla trzech przypadków wyższe od 8 W/m² na 100 lx. Jest to rezultat relatywnie niskiej skuteczności świetlnej modułów OLED i niskiej sprawności oświetlenia rozwiązań oświetleniowych. Konieczne jest udoskonalanie technologii OLED, aby ich wykorzystanie do oświetlenia wnętrz mogło być bardziej racjonalne i powszechne.

EN

The article presents selected issues regarding organic light-emitting diodes OLED and their use for interior lighting. In the introduction the structure of OLEDs and production of light were discussed. In the practical part of the work, the results of computer simulation of lighting parameters in eight interiors were presented. Typical OLED modules were used for simulation, the number and layout of which were selected in order to obtain the required level of average illuminance and uniformity on task area. The levels of relative ceiling and wall illuminances, cylindrical illuminance on reference plane, and lighting system normalised power density were analysed. The obtained results showed that the use of the ceiling OLED modules led to relatively high levels of the all analysed relative illuminances, which corresponded to good lighting saturation in the interiors. This is a beneficial effect. Unfortunately, in the analysed cases high levels of unified glare rating, higher than 19, were obtained and high levels of lighting normalised power density were obtained: higher than 4 W/m² per 100 lx for seven cases and higher than 8 W/m² per 100 lx for three cases. This was the result of relatively low luminous efficacy of the OLED modules and low utilisation factor of the lighting solutions. It is necessary to improve OLED technology to provide more rational and common use in interior lighting.

8

The impact of room and luminaire characteristics on general lighting in interiors

Pracki P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2020

|

Vol. 68, nr 3

447--457

EN

General lighting is the most common way of illuminating interiors and the source of electricity consumption in buildings. This fact forces the search for lighting solutions effective both for people and the environment. In this study the impact of room and luminaire characteristics on general lighting conditions and energy efficiency in interiors is considered. In rooms of different sizes and reflectances, seventeen luminaire types with various light distributions were arranged in uniform layouts. The levels of average illuminance, uniformity and normalised power density related to two horizontal working planes were calculated. The impact of working plane reduction, room index and reflectances, lighting class and luminous intensity distribution of luminaire on the considered parameters was investigated. The use of the reduced working plane resulted in the increase in the average illuminance (7.7% on average), uniformity (33% on average) and normalised power density (23% on average). The impact of the room index and lighting class on the average illuminance and normalised power density was significant while the impact of the luminaire luminous intensity distribution and room reflectances was low. The normalised power density levels of the general electric lighting in interiors, with luminaire luminous efficacy of 100 lm/W, are in the following range: 1.08‒3.42 W/m2 per 100 lx. Based on these results a normalised power density level of 2 W/m2 per 100 lx is recommended for designing and assessing the new general electric lighting systems in buildings.

9

Strategies influencing energy efficiency of lighting solutions

Pracki P., Wiśniewski A., Czyżewski D., Krupiński R., Skarżyński K., Wesołowski M., Czaplicki A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2020

|

Vol. 68, nr 4

711--719

EN

Lighting technologies developed significantly in the last decade. New LED light sources, dedicated luminaires and improved lighting control techniques gave rise to new possibilities in improving energy efficiency of lighting solutions. The article is an overview of interior, road and exterior architectural object lighting design strategies. It also presents design considerations that directly impact lighting conditions and energy eff iciency. Practical examples of the application of basic design strategies, accompanied by the obtained energy results, are also depicted. Issues discussed in the article may be useful in researching and designing interior and road lighting, as well as f loodlighting. They can also be useful in planning and implementing strategies aimed at improving lighting conditions and energy efficiency of lighting solutions.

10

Methods for designing and simulating optical systems for luminaires

Żagan W., Zalewski S., Słomiński S., Kubiak K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2020

|

Vol. 68, nr 4

739--750

EN

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.

11

Calculations of energy savings using lighting control systems

Wiśniewski A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2020

|

Vol. 68, nr 4

809--817

EN

The development of technology and design of light management systems remains dynamic. Among all the benefits offered by these systems, the most valuable might definitely be the possibility of saving energy consumption. Knowing the value of energy savings is the key factor that users need to know before deciding to use a lighting management system (the type of light management system). For this purpose, it is useful to simulate the operation of the lighting control system, for example in the DIALux program. Such simulation helps evaluate potential savings in electricity consumption using the proposed lighting control system. In the DIALux program, it is possible to change the luminous flux value of luminaires. In such a case, it becomes possible to semi-simulate the light management system’s operation as we don’t receive actual information on reducing installed power of the lighting system during reduction of the luminous flux value of luminaires. This article shows what type of technical data are important to use for the DIALux program to properly and accurately simulate light management systems and to receive accurate data on energy saving. It also presents the results of photometrical and electric parameter measurements (Φ – luminous flux, P – power, PF – power factor, THDi – total harmonic distortion of current). The article discusses the power control characteristics obtained on the basis of these measurements and explores the source of differences between simulation of energy saving calculations and real measured energy savings. An existing lighting control system installed in an office reception area was used to compare calculations with the real value of energy consumption reduction. The impact of electronic power and control systems on electrical network parameters is also an important problem mentioned in this article. It also explores the effect of power regulation of LED luminaires and LED modules on the value of the power factor and total harmonic distortion (current) value (THDi).

12

Visual and photometric consequences of using semi-spherical LEDs in diffuser shades

Żagan Wojciech, Krupiński Rafał

Przegląd Elektrotechniczny

|

2019

|

R. 95, nr 2

150--153

EN

The article presents and analyzes the observed phenomenon of optical deformation of a cylindrical dispersing diffuser as the effect of a classical replacement a light source by LED retrofit. A cylindrical diffuser equipped with such a light source presents a luminance distribution that significantly deviates from the actual view of the unshielded lampshade. This is a feature which disqualifies such an application of these sources for aesthetic reasons, the more so because the accompanying effect is also a noticeable deformation of the cylindrical shape. In the article, apart from the analysis of the phenomenon, the equation of the diffuser profile was presented, which using the discussed type of LED source could realize an even distribution of luminance on the surface.

PL

Artykuł przedstawia i analizuje zaobserwowane zjawisko deformacji optycznej klosza cylindrycznego, rozpraszającego jako efektu zastąpienia klasycznego, źródła światła przez retrofit LED. Cylindryczny klosz rozpraszający wyposażony w takie źródło światła prezentuje rozkład luminancji, który znacząco odbiega od rzeczywistego widoku niezaświeconego klosza. Jest to cecha dyskwalifikująca taką aplikację tych źródeł z powodów estetycznych, tym bardziej, że efektem towarzyszącym jest również zauważalna deformacja kształtu cylindrycznego. W artykule, poza analizą zjawiska przedstawiono równanie profilu klosza, który przy zastosowaniu omawianego rodzaju źródła LED realizował by równomierny rozkład luminancji na powierzchni.

13

The influence of different photometric observers on luxmeter accuracy for LEDs and FLs lamps measurements

Fryc Irena, Tabaka Przemyslaw

Optica Applicata

|

2019

|

Vol. 49, nr 2

345--354

EN

Age-dependent changes in human eye spectral sensitivity play an important role in contemporary lighting research. Nowadays lighting designing practices take into account the fact that an illuminance level perceived by a given observer depends also on his age. According to recommendations of the International Commission on Illumination CIE presented in the document 227:2017, users age should be taken into account in lighting design of public buildings. The natural consequence of this approach in designing should be the fact that the age of a user also should be considered when verification of lighting installation photometric parameters is performed. According to recommendations of latest CIE documents, verifications of illuminance levels are performed by luxmeters whose spectral sensitivity matches the CIE standard photometric observer V(λ) function. At present there is a lack of papers describing how the accuracy of illuminance measurements could be affected by the fact that with age there are changes in human eye spectral sensitivity and it differs from V(λ) function. To fill this gap we present in this article results showing how applying of different photometric observers influence the luxmeter accuracy. The calculations were performed for LED and FL light sources measured by class B and class C luxmeters. These results indicate that a luxmeter error f1 strongly depends on correlated color temperature of a lamp under measurement and spectral sensitivity of applied photometric observer.

14

Concept and implementation of adaptive road lighting concurrent with vehicles

Zalewski S., Pracki P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2019

|

Vol. 67, nr 6

1117--1124

EN

The paper presents the authors’ concept of an adaptive road lighting that is concurrent with vehicles moving on roads. The lighting system is based on luminaires with light emitting diodes. The authors describe the operation of the adaptive road lighting system and point out benefits and limitations of the solution. The theoretical considerations are supported by an analysis of the installed and working system that was implemented at Bożeny street in Poznan, Poland. The system was also evaluated by the residents living near the street.

15

Advanced modelling and luminance analysis of LED optical systems

Słomiński S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2019

|

Vol. 67, nr 6

1107--1116

EN

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.

16

Light pipe prototype testing

Omishore A., Mohelnik P., Míček D.

Przegląd Elektrotechniczny

|

2018

|

R. 94, nr 4

107--112

EN

The article reviews the potential of light pipe system as a daylighting approach in buildings and presents results of experiments on performance of tubular light pipe prototype. The main task is focused on an examination of the system light efficiency on the basis of long-term illuminance measurements. The data from the measurement give overview about the potential of the light guiding system for direct solar radiation. For temperate climate with dominant cloudy sky conditions the light guide shouuld be completed with sun tracking system to increase efficiency.

PL

W artykule zaprezentowano możliwość zastosowania światłowodu do oświetlania pomieszczeń w budynkach. Badano przede wszystkim skuteczność oświetlenia na podstawie długoczaswych pomiarów. W przypadku zachmurzonego nieba system powinien współpracować z układem śledzącym położenie słońca.

17

The aesthetics of lighting

Żagan W., Kowalska M.

Przegląd Elektrotechniczny

|

2017

|

R. 93, nr 7

144--147

EN

The article presents reflections about connections between lighting and aesthetics. It presents the authors' vision of the problem taken from their own experiences and knowledge in the field of lighting technology and general knowledge about aesthetics. Three aspects of the problem in question were identified in the article: aesthetics of illuminated objects and lighting equipment while it is switched on and off. One of the particuarly important matters of aesthetics is equipment while it’s turning on, because, so far, this problem was not clearly discernible.

PL

Artykuł przedstawia rozważania autorów na temat związku estetyki i oświetlenia. Pokazano spojrzenie autorów wypracowane na bazie doświadczenia z zakresu techniki świetlnej i ogólnej wiedzy z zakresu estetyki. Dostrzeżono trzy aspekty problemu: estetyka obiektu w następstwie oświetlenia, estetyka opraw oświetleniowych przed i po załączeniu. Ważna jest również nie zauważana dotychczas kwestia estetyki włączników instalacyjnych.

18

Penetracja światłem obiektu iluminowanego w kontekście polskich wymagań normatywnych

Skarżyński K.

Polish Journal for Sustainable Development

|

2017

|

T. 21, cz. 2

107--116

PL

Celem referatu jest zdefiniowanie oraz określenie, na postawie pomiarów, ilościowego charakteru nowego parametru – strumienia penetrującego. Ponadto wyniki pomiarów terenowych oraz prostych symulacji komputerowych zostały odniesione do obowiązujących w Polsce wymagań normatywnych i skomentowane z punktu widzenia osoby zajmującej się projektowaniem oświetlenia. Obiekt, który posłużył za przedmiot badań to Centrum Weterana Działań Poza Granicami Państwa w Warszawie.

EN

The main aim of this paper is to define the quantitative nature of a new parameter which is called penetrating luminous flux. It is made by the measurement of illuminance on the windows of an actual floodlit object. Additionally, the results of field measurements and simple computer simulations are compared with the valid requirements of the Polish standard connected with light trespass and the light pollution. The results are also carefully commented upon from the point of view of the lighting designer. The object which forms the basis of the analysis in this paper is the Centre for Foreign Mission Veterans in Warsaw.

19

Energooszczędne systemy oświetlenia obiektów architektonicznych w aspekcie zagrożenia środowiska naturalnego

Siedlecki B., Czaplicka A.

Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture

|

2017

|

z. 64, nr 4/II

501--510

PL

Współczesny rozwój technologii oświetlania obszarów miejskich pozwala na zaprojektowanie percepcji architektury zarówno w skali urbanistycznej jak i poszczególnych obiektów. Niestety rzadko wykorzystuje się wiedzę i potencjał specjalistów w tej niedocenianej dziedzinie projektowania a może nawet twórczości. Brak dostosowania rodzaju, mocy i kierunku strumienia światła powoduje zarówno oślepienie użytkowników przestrzeni miejskiej jak i powstanie stref niedoświetlonych, czyli niebezpiecznych w aspekcie społecznym. Artykuł stanowi „głos w dyskusji” nad potrzebą intensyfikacji wprowadzenia do zagadnień planowania przestrzennego problematyki związanej z oświetleniem budynków, zabytków, ulic i innych elementów przestrzeni miejskiej, zwracając równocześnie uwagę na istotę problematyki zanieczyszczenia środowiska światłem sztucznym.

EN

Modern lighting technology development of urban areas allows projects perception of architecture both in the urban as well as individual objects. Unfortunately, rarely uses the knowledge and potential of specialists in the field of design undervalued and might even work. No adjustment of the type, strength and direction of the light beam will both dazzle users of urban space and the formation of zones of shadows, which is dangerous in the social aspect. The article is "in discussions" on the need to intensify the introduction to the issues of urban planning issues related to the lighting of buildings, monuments, streets and other public space, while paying attention to the essence of the problems of environmental pollution with artificial light.

20

Układy reflektorów zwierciadlanych ze źródłami światła LED

Żagan W., Krupiński R., Zalewski S.

Przegląd Elektrotechniczny

|

2016

|

R. 92, nr 9

191--193

PL

Artykuł przedstawia rozważania na temat możliwych rozwiązań geometrycznych i optycznych reflektorów wykorzystujących LED-y. Wyodrębniono 3 rodzaje układów optycznych, z których jeden- reflektor łyżkowy, jest nowym pomysłem wykorzystania LED-ów w układach wzmacniających światłość. Dla tego reflektora wykonano badania symulacyjne. Obliczono rozsyły światłości i obrazy źródła światła w lustrze odbłyśnika (FJP). Nowością, jeśli idzie o wyniki, jest brak symetrii obrotowej plamy świetlnej na ekranie na rzecz kształtu owalnego. Wyniki poddano analizie wskazując na możliwość wykorzystania geometrii układu optycznego reflektora łyżkowego jako sposobu przezwyciężenia niekorzystnych następstw świecenia bezpośredniego ze źródła światła.

EN

This article presents reflections on possible geometric and optical conceptions of spotlight reflectors that use LEDs. It has been listed three types of optical systems, of which one- spoon spotlight reflector is a new idea of using LEDs in a light amplification systems. For this reflector simulation study was made. Distributions of light and images of the light source in a mirror spotlight reflector (FJP) has been calculated. As a novelty in the results appears the lack of rotational symmetry of a light spot on the screen and the presence of the oval shape. The results were analyzed to indicate the possibility of using the geometry of the optical system of the spoon reflector as a way to overcome disadvantages of direct lighting.