light & engineering

96 Pages·2015·7.8 MB·English

ISSN 0236-2945
LIGHT &
ENGINEERING
Volume 23, Number 4, 2015
LLC œEditorial of Journal œLight TechnikB, Moscow
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LIGHT & ENGINEERING
(Svetotekhnika)
Editor-in-Chief: Julian B. Aizenberg
Associate editor: Sergey G. Ashurkov
Editorial board chairman: George V. Boos
Editorial Board: Vladimir P. Budak Anna G. Shakhparunyants
Alexei A. Korobko Nikolay I. Shchepetkov
Dmitry O. Nalogin Alexei K. Solovyov
Alexander T. Ovcharov Raisa I. Stolyarevskaya
Leonid B. Prikupets Konstantin A. Tomsky
Vladimir M. Pyatigorsky Leonid P. Varfolomeev
Foreign Editorial Advisory Board:
Lou Bedocs, Thorn Lighting Limited, United Kingdom
Wout van Bommel, Philips Lighting, the Netherlands
Peter R. Boyce, Lighting Research Center, the USA
Lars Bylund, Bergen’s School of Architecture, Norway
Stanislav Darula, Academy Institute of Construction and Architecture, Bratislava, Slovakia
Peter Dehoff, Zumtobel Lighting, Dornbirn, Austria
Marc Fontoynont, Ecole Nationale des Travaux Publics de l’Etat (ENTPE), France
Franz Hengstberger, National Metrology Institute of South Africa
Warren G. Julian, University of Sydney, Australia
Zeya Krasko, OSRAM Sylvania, USA
Evan Mills, Lawrence Berkeley Laboratory, USA
Lucia R. Ronchi, Higher School of Specialization for Optics, University of Florence, Italy
Nicolay Vasilev, Sofi a Technical University, Bulgaria
Jennifer Veitch, National Research Council of Canada
Moscow, 2015
Editorial Offi ce:
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106 Prospekt Mira,
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CONTENTS
VOLUME 23 NUMBER 4 2015
LIGHT & ENGINEERING
(SVETOTEKHNIKA)
CIE Statement on Non-Visual Effects of Light Recommending
Proper Light at the Proper Time 4
Yoshi Ohno, Mira Fein, and Cameron Miller
Vision Experiment on Chroma Saturation for Colour Quality Preference 6
Dmitry V. Skums and Lyubov D. Chaikova
Experimental Research of Evaluation Methods for Colour Rendition Quality 15
Rafał Krupiński
Visualization as Alternative to Tests on Lighting under Real Conditions 22
Axel Stockmar
Extension of the Luminance Concept in Road and Tunnel Lighting 30
Giuseppe Rossi, Paola Iacomussi, Andrea Mancinelli, and Paolo Di Lecce
Adaptive Systems in Road Lighting Installations 33
Pierre Boulenguez, Imene Jaadane, Cristophe Martinsons, Samuel Carré,
Sabine Chahory, and Alisio Torriglia
Photobiology – P resentation of a Blue Light Hazard in Vivo Experiment on the Rat 41
Galina N. Gavrilkina, Elena I. Ilyinna, and Henri S. Sarychev
Once More on the Subject of Preventive UV–Irradiation as a Means to Eliminate “Solar Starvation” 51
Andrei A. Yemelin,, Leonid B. Prikupets, and Ivan G. Tarakanov
Spectral Aspect when Using Light-Emitting Diode Irradiators for Salad Plant Cultivation
under Photoculture Conditions 55
Alexander A. Sharakshane, Anton S. Sharakshane, and Raisa I. Stolyarevskaya
Evaluating the Uncertainty of the Spectroradiometric Approach for the Calculation
of SSL Luminaires Chromaticity Coordinates 63
Dmitry Yu. Yurovskikh
Degradation of Light Emitting Diodes: The Connection between Operation Conditions,
and Actual and Declared Service Life 69
Jürgen P. Weißhaar
Next Generation Goniophotometry 75
Sergei A. Golubin, Alexei N. Lomanov, Vladimir S. Nikitin, and Valery M. Komarov
Experimental Research on the Performance of Optical Ministicks with a Common Receiver 81
Alexei N. Lomanov, Vladimir S. Nikitin, Alexander V. Solostin, Ernst I. Semyonov,
and Sergei. V. Chaika
Application of Additive Technologies in the Manufacture of Fiber Optic Splitters 88
Contents 2015
#1 91
#2 92
#3 93
3
Light & Engineering Svetotekhnika
Vol. 23, No. 4, pp. 4-5, 2015 No. 6, 2015, pp. 39-40
CIE Statement on Non-Visual Effects of Light
RECOMMENDING PROPER LIGHT AT THE PROPER TIME
BACKGROUND fects of light exposure depend on the spectrum, inten-
sity, duration, timing and temporal pattern (light history)
The defi nition of light identifi es it as the electro- of the light exposure.
magnetic radiation that stimulates vision. However, we In order to give further guidance to all interested
now know conclusively that photoreception in the eye parties on the future use of non-visual effects of light
leads not only to vision but also to effects on human for human health and performance, while at the same
physiology, mood and behavior, often summarized as time avoiding possible risks, CIE will be presenting two
non-visual effects of light. Research on such effects in- new publications on the state of science in this excit-
tensifi ed at the beginning of this millennium. It was fue- ing research fi eld:
led by the revolutionary detection of a new class of pho-
toreceptors in the human eye that detect optical radiation 1. How to measure light with respect to non-
but do not contribute to image formation. These photo- visual effects: Technical Note of CIE DR6–42 (TN003)
receptors were fi rst identifi ed in connection with their role
in circadian regulation, particularly of the hormone mela- One of the greatest limitations to making concrete
tonin, and for this reason one reads of circadian or mel- recommendations for healthy non-visual light exposures
anopic effects. We are learning now that these photo- has been the diffi culty in characterizing the impact of
receptors infl uence many other processes as well. In ipRGC exposures. In 2013, an independent workshop of
recent years the catchphrase “Human-Centric Lighting” leading scientist in the fi eld of quantifying light for non-
( HCL) has come to describe lighting that is intended to visual effects took place in Manchester, with support from
address all of these effects. a moderator and a reporter from CIE. This workshop re-
The basic evidence for the new photoreceptors, sulted in a scientifi c consensus and agreement concern-
called melanopsin-containing or intrinsic photosensi- ing the action spectrum of the ipRGC photoreceptor and
tive retinal ganglion cells (ipRGC), and the fi rst identi- a strategy for quantifying the stimulus for non-visual in-
fi ed implications for lighting have been summarized in put into the human photoreception system, recognizing
CIE158:2004 (which was revised to become 158:2009, the interaction between all of the photoreceptors (Lucas
including Erratum 1). CIE continued to explore this topic et al. 2014). CIE TN003 gives comprehensive information
with two expert symposia in 2004 and 2006, with work- on the workshop and its outcome. This technical note will
shops at its Session meetings in 2007 and 2011, and by be freely available from the CIE web site, together with
initiating several technical committees. Other societies a calculation toolbox to facilitate consistent stimulus
also responded with events, debates, and discussion con- calculation and intercomparison of results.
cerning how best to incorporate this knowledge into light-
ing practice. 2. Identifying the Proper Light: Technical Report of
Scientists, the lighting industry, lighting designers CIE TC3–46
and other stakeholders in the lighting community have
continued to identify options and to design products and The Manchester workshop concluded that non-
solutions that make use of non-visual lighting effects in visual responses are subject to complex signal pro-
a benefi cial way, despite the fact that the established cessing in the central nervous system and infl uenced by
knowledge in this fi eld is still premature. Among the few as-yet-unresolved interactions of photoreceptive units.
points of general agreement is that the non-visual ef- The missing understanding of the input-output char-
4
Light & Engineering Vol. 23, No. 4
acteristics between light stimulus and the resulting non- who are beginning to apply lighting in new ways, to in-
visual response seems to make tailored light application tentionally include non-visual effects, with a particular
for a desired lighting effect impossible. On the other emphasis on achieving integrated recommendations for
hand, observations in laboratory and application stud- high-quality lighting. This dual approach shall lead to an
ies show benefi cial effects on human health and per- improved and comprehensive understanding of the light-
formance, using lighting systems developed on the ing effects on humans and to more healthful interior light-
basis of very general ideas concerning how to trans- ing in the future.
late basic scientifi c fi ndings into lighting design specifi -
cations. The main principles for these observations have REFERENCES
been to increase the light levels and/or change spectral
composition during daytime in order to increase the input 1. CIE158:2009 Ocular Lighting Effects on Human
into the ipRGCs and to do the opposite in the recovery Physiology and Behaviour.
phases of evening and night, by reducing light input 2. CIE x027:2004 Proceedings of the CIE Sympo-
to these cells. Thus there may be “low hanging fruits” in sium 2004 on Light and Health: Non-Visual Effects, 30
terms of application opportunities in this fi eld, but this still Sep. – 2 Oct. 2004, Vienna, Austria.
needs clarifi cation. 3. CIE x031:2006 Proceedings of the 2nd CIE Ex-
Even prior to the confi rmation that ipRGCs constitute pert Symposium “Lighting and Health”, 7–8 September
a separate retinal photoreceptor class to the rods and 2006, Ottawa, Ontario, Canada.
cones, there was a fundamental difference of opinion 4. CIE TN003:2015 Report on the First International
between those who would see this new information in- Workshop on Circadian and Neurophysiological Photom-
corporated into lighting practice immediately, and those etry, 2013 (in press)
who argued for a more cautious approach with strong- 5. Lucas, R.J., Peirson, S.N. et al. (2014). Measur-
er evidence both for benefi cial effects and to eliminate ing and using light in the melanopsin age. Trends Neu-
unintended adverse consequences. CIE TC3–46 WD rosci 37(1): 1–9.
“Research Roadmap for Healthful Interior Lighting Ap-
plications” focuses on identifying the gaps in current ABOUT CIE
knowledge for a safe and benefi cial future use of light
including non-visual responses. The report also delivers The International Commission on Illumination – a lso
a research roadmap and tools for a systematic and sound known as the CIE from its French title, the Commission
understanding of the biological system to enable predic- Internationale de l´Eclairage – is devoted to worldwide
tions with respect to biological outcome on the basis of cooperation and the exchange of information on all mat-
the input characteristics. The purpose of this report is ters relating to the science and art of light and lighting,
to focus research attention on the knowledge gaps that colour and vision, photobiology and image technology.
most impede the development of recommendations for in-
terior lighting. With strong technical, scientifi c and cultural foun-
dations, the CIE is an independent, non-profi t organi-
FURTHER CIE STRATEGY zation that serves member countries on a voluntary ba-
sis. Since its inception in 1913, has been accepted as
CIE is setting up a new Joint Technical Committee be- representing the best authority on the subject and as
1
tween the relevant Divisions to follow up on the results such is recognized by ISO as an international standard-
of the Manchester workshop and translate the scientifi c ization body.
consensus into a fi rst international standard on quan-
tifying irradiance with respect to stimulation of all ocu- For any further information please contact
lar photoreceptors. To address the issues of safe and
healthy applications, CIE will coordinate with ISO/TC274 CIE Central Bureau
and other interested stakeholders on guidance for those Dr. Peter Zwick email:
Light & Engineering Svetotekhnika
Vol. 23, No. 4, pp. 6-14, 2015 No. 5, 2015, pp. 12-18
VISION EXPERIMENT ON CHROMA SATURATION
FOR COLOUR QUALITY PREFERENCE*
1 2 1
Yoshi Ohno , Mira Fein , and Cameron Miller
1
National Institute of Standards and Technology, Gaithersburg, MD USA,
2
Psychology Department, Oberlin College, Oberlin, Ohio, USA
E-mail:
Light & Engineering Vol. 23, No. 4
adopt ed as a standard. The Colour Quality Scale where 20 subjects evaluated colour appearance of
(CQS) developed by NIST [4] has not been accept- variety of fruits, vegetables, and their skin tones, un-
ed as a standard mainly due to a diffi culty defi ning der lights with varied chroma saturation levels. The
a metric that evaluates combined effects of colour results of the experiment are presented and a way
fi delity and colour preference. International Com- toward developing a colour preference metric based
mission on Illumination (CIE) has now two separate on these results is discussed.
TCs, one developing a new colour fi delity metric
(TC1–90) and another writing a report on existing 2. EXPERIMENTAL SETTINGS WITH
metrics for colour quality other than fi delity (TC1– NIST STLF
91). It is considered that an improved colour fi delity
metric alone will not solve the problem of correla- The NIST STLF, as shown in Fig. 1, was used,
tion with perception, and there is a need for a pref- which has 25 channels of LED spectra (from 405
erence-based metric to evaluate the colour quality nm to 650 nm peak) and can control spectral distri-
1
of light sources in real applications as perceived by bution, correlated colour temperature (CCT), Duv ,
general users. and illuminance, independently, illuminating re-
To develop such a preference-based metric, al-room size cubicles (each 2.5 m x 2.5 m x 2.4 m).
visual evaluation data are needed. The main reason There are two cubicles side by side, independent-
for the discrepancy between the CRI score and the ly controlled, and the walls of different colours and
perception is that the CRI measures colour fi delity, surface textures can be replaced easily. For this ex-
only one aspect of colour quality, while general user periment, only one cubicle with off-white (achro-
judge colour rendering based on their preference of matic) walls was used (the right side in Fig. 1). The
object colour appearance. The discrepancy mainly facility can produce up to about 300 lx to 800 lx of
occurs when the chroma of objects is enhanced by white light illumination on the table, depending on
lighting, e.g., by narrowband white LED sources or the spectrum of light.
hybrid sources (combination of broadband and nar- The light source unit of the STLF has very large
row- band red). It is experienced that chroma-en- heat sinks, which are cooled by forced air, and the
hanced sources are generally preferred, but if the temperature of the heat sink is only about 27 °C
chroma saturation is excessive, the objects appear when these spectra at ~300 lx are produced, while
unnatural and the preference will decrease. Such the room temperature is kept at 25 °C ±1 °C. The
quantitative evaluation data on the preferred level of STLF needs only about 15 minutes to stabilize, after
chroma saturation have not been available. To obtain which the chromaticity is stable to within ± 0.0005
such data, a series of vision experiments have been in (u’, v’) for four hours, and reproduces the set
conducted using the NIST Spectrally Tunable Light- chromaticity to within ± 0.001 in (u’, v’) over one
ing Facility (STLF) [6] simulating an interior room, month. The STLF can change the light spectrum in-
Fig. 2. The CIELAB (a*, b*) plots of the 15 CQS samples for the nine different saturation levels used for the experiment
for 3500 K, Duv=0 (left) and Duv= –0.015 (right). The black line is for the reference illuminant in CRI (Planckian radia-
tion at the same CCT)
7
Light & Engineering Vol. 23, No. 4
Fig. 3. The spectral distributions set at NIST STLF for the four CCT/Duv conditions for the experiment. “DC” in the
fi gures represents ∆C*ab
Fig. 4. The CRI Ra, R9 values and CQS Qa values of the spectra at the four CCT/Duv conditions used in the experiment
stantly so that there was no switching time between each of 3 different CCTs; 2700 K, 3500 K, and 5000
two lights presented sequentially and stable imme- K. The chroma was set to CIELAB chroma differ-
diately, which allows easy comparison of a pair of ences, ∆C*ab = –16 to +16 from the neutral condition
lights presented sequentially. (the chroma of the reference illuminant of CRI) at
For the experiment, the STLF was set for RGBA intervals of 4 ∆C*ab units, measured on the red CQS
spectra with peaks around 460 nm, 530 nm, 590 nm, sample [4]. The chroma for the green CQS sample
and 635 nm. Such a combination of narrowband had slightly smaller changes of chroma than the red
peaks was needed to create increased chroma satu- sample, while there were very small chang es in chro-
ration. (Smooth broadband spectra cannot achieve ma in yellow and blue regions with chang es of the
it). The chroma saturation was varied by changing amber/red ratio. So the overall gamut area also in-
the red/amber ratio. Nine different levels of chroma creased or decreased as the chroma saturation was
saturation as shown in Fig. 2 (left) were prepared at changed.
8