CIE 2017 Midterm Meeting, Jeju Island, Republic of Korea. October 20 - 28, 2017 

CIE Tutorial and Practical Workshop on LED Lamp and Luminaire Testing to CIE S 025, Bern-Wabern, Switzerland.

Outline for

CIE Introductory Tutorial & Workshop on Mesopic Photometry

CIE Central Bureau, Vienna/AT

24 – 25 January 2012

(09:00am – 05:00pm)

January 24, 2012
Subject area
 Specific topics
 Speaker  Schedule
Welcome and Introduction

Welcome by

Martina Paul, GS (on behalf of CB)

Teresa Goodman, VPP

Yoshi Ohno, VPT

  09:00 -  09:10
Background Historical overview
Different approaches that have been taken to establishing a system of mesopic photometry
Differences between physical photometry and visual photometry
Brightness photometry versus visual performance approaches

Janos Schanda


09:10 - 10:00
CIE system Basis for the system
Detailed description of the system
Limitations of use
Actions needed by CIE to get the mesopic system implemented in outdoor lighting

Liisa Halonen


10:00 - 10:50
Coffeebreak     10:50 - 11:10
CIE supplementary system Basis for CIE supplementary system of photometry (for brightness evaluations)
Detailed description of the system
Possible application areas

Ken Sagawa


11:10 - 12:00
Measurement Physical photometry and how the CIE system for mesopic photometry fits into the broader CIE system for physical photometry
Units of measurement for mesopic photometry
Specification of product performance
Factors that need to be taken into consideration when making measurements under the mesopic system
How to calculate mesopic luminance and illuminance
Possible measurement approaches / instrumentation
How the system might be introduced into current specifications e.g. for road lighting
Open measurement questions that must be answered

Teresa Goodman


12:00 - 13:00
Lunchbreak     13:00 - 14:00
Introduction to practical application Review of potential application areas (road lighting, emergency escape lighting, …)
What is really important for these applications (luminance, illuminance, colour appearance, …)?
Review of current specification standards used in these areas (worldwide)
Review of current research into the role of SPD in street lighting

Peter Bodrogi


14:00 - 14:50
Issues for practical application Opportunities and limits of a mesopic photometry
What is the influence of the spectrum of currently used lamp types on peripheral recognition?
Is there an optimal spectral distribution for street lighting?
What are the typical tasks of a driver that must be supported?
When we have optimized the spectrum for the driver task, what disadvantages will the pedestrian have?

Stephan Völker


14:50 - 15:40
Coffeebreak     15:40 - 16:00
  Wrapping it up - Q & A   16:00 - 17:00
January 25, 2012 EXPERT WORKSHOP    
Subject area
Specific topics  Speaker  Schedule
Residential street lighting Differing requirements of lighting for drivers and for pedestrians
Role of SPD in facial recognition
Role of SPD in obstacle detection
Role of SPD in perceived pedestrian safety and crime prevention
Possible approach for new specification standards for street lighting

Steve Fotios


09:00 - 09:45
Visual adaptation field Experimental study of the visual adaptation field in mesopic photometry

Tatsukiyo Uchida


09:45 - 10:20
Adaptation and viewing conditions Adaptation and viewing conditions of pedestrians and drivers in outdoor lighting
Data and measurements conducted on luminances and eye-fixation in varied outdoor lighting installations (road, pedestrian)
Relative importance of foveal and peripheral vision
Actual adaptation conditions and useful visual field size in mesopic applications

Marjukka Puolakka


10:20 - 10:55
Coffeebreak     10:55 - 11:15
Field experiments on roadway lighting First results of a field experiment of a street light installation with variable s/p ratio

Peter Blattner


11:15 - 11:50
Mesopic dimensioning Examples of mesopic dimensioning in street lighting
Calculation of mesopic luminances for varied street lighting installations (HPS, LED, MH)
Comparison of photopic/mesopic target values and the energy use
Analysis of the impact of mesopic photometry on: visual conditions, selection of light sources, energy use

Liisa Halonen


11:50 - 12:25
Field experiments on roadway lighting Field experiments of visual task performance on real roadways using different types of light sources
Comparison of results

Johan Alferdinck


12:25 - 13:00
Lunchbreak     13:00 - 14:00
Practical application Application of the visibility level under mesopic conditions and different spectral distributions

Jan Winter


14:00 - 14:35
Practical calculations What instruments are needed for mesopic photometry?
M/P ratio meter as a possible practical way of measurement instrumentation
Practical calculation formula for mesopic luminance without iterative solution

Yoshi Ohno


14:35 - 15:10
Coffeebreak     15:10 - 15:30
New visual models New mesopic model based on retinal structure and physiological processes

Werner Backhaus


15:30 - 16:05
  Wrapping it up - Q & A  

16:05 - 16:50

 Close of meeting

Summary and close by

Teresa Goodman, VPP


16:50 - 17.00




Tutorial: EUR 550,--/Workshop: EUR 150,--/Both: 650,--

Students: EUR 275,--/EUR 75,--/EUR 300,--

Members of CIE National Committees: EUR 400,--/EUR 100,--/EUR 450,--

(Note that all prices are subject to 20% VAT)

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