CIE Lectures

2012 CIE Lecture on Photometry, Colorimetry, Metrology and Standards for SSL Lighting

General Information
Date: September 16-18, 2012 (Sunday-Tuesday)
Venue: Yuanzheng Qizhen Hotel
Organizers: International Commission on Illumination (CIE) and China Illuminating Engineering Society (CIES)
Host: Colour Institute, Zhejiang University, Hangzhou
Registration & Fees


These CIE Lectures are intended to provide the most up-to-date knowledge in the field of colour and vision science as well as illuminating engineering. This particular course is divided into three sessions:

  1. CIE Colorimetry
  2. Metrology and Applications for SSL and LED Lighting and
  3. Standards Development for SSL and LED Lighting

The first session will cover the fundamentals of colour science and recent developments in CIE Division 1 (Vision and Colour) whereas the other two will include metrology, applications, and standards for SSL and LED lighting. The lectures will be given by the world leading experts: Ming Ronnier Luo, Yoshi Ohno and Janos Schanda.



Lecturer: Dr. Ming Ronnier Luo

CIE colour specification system
CIE Standard Colorimetric Observer, CIE illuminants, CIE Illuminating/Viewing geometry, CIE XYZ system, CIE chromaticity diagram. [CIE 15: Colorimetry; ISO 1164-1 to 3 /CIE S 014-1 to 3 Joint ISO/CIE Standards: Colorimetry Series]
Uniform colour space and colour difference equations
CIELUV, CIELAB, CIEDE2000 [ISO 1164-4 to 6 /CIE S 014-4 to 6 Joint ISO/CIE Standards: Colormetry Series]. CIEUVW, CIE94, CMC will also be covered.
Chromatic adaptation transform and colour appearance modelling
von Kries, CMCCAT2000, CAT02 [ CIE 160: A review of chromatic adaptation transforms]; CIECAM02 [CIE 159: A colour appearance model of colour management systems: CIECAM02]. An extended CIECAM02 version (CAM02-UCS) will also be introduced.
Colour Rendering Index
The CIE colour rendering index will be introduced. Demonstrations will be given to show the colour change of  physical samples across different CIE illuminants. In addition, formulation of lamps will be generated from a set of LED dataset and it will be replicated by an illumination device.
Activities in CIE Division 1 (Vision and Colour)
To introduce the CIE Division 1 activities in relation to the lighting industry.

Lecturer: Dr. Janos Schanda

Colour vision
Structure of the eye, the retina. Different light sensitive receptors, neural network in the retina, pathways to the visual cortex, cone fundamentals
Mesopic vision model and its application
History of mesopic photometry, the two CIE systems: “CIE supplementary system of photometry” and “Mesopic photometry based on visual performance”
Light and circadian
The third type of photoreceptor, the light sensitive ganglion cells, their function and influence on the human circadian system. Advantages (influencing the SAD syndrome) and dangers.
LED photobiological safety
Action of UV and visible radiation on human tissue (eye and skin hazards), photobiological safety of light sources, especially LEDs.
The nCRI colour rendering index
Colour fidelity metric, problem with the selection of test reflection samples, steps of the proposed nCRI system, comparison with visual experiments

Lecturer: Dr. Yoshi Ohno

Fundamentals of photometry and Colorimetry for LED
Quantities and units in photometry, principles in photometry & radiometry, geometrical relationship, colorimetric quantities for light sources
Measurement of LEDs and SSL
CIE 127, measurement of high power LEDs, practical sphere photometry, goniophotometry, spectral color measurement, measurement and testing of LED lamps, luminaires, and modules (CIE/CEN draft, IES LM-79, LM-82).
Standards of SSL
International activities – CIE standards and activities, CEN, IEC, IEA 4E SSL Annex, regional and U.S. standards – Energy Star, DOE programs, NVLAP accreditation, updates on IES LM-80, TM-21, ANSI C78.377.
The CQS colour rendering metric
Colour rendering and luminous efficacy, broadband vs. narrowband spectra,
problems of CRI with LED sources, perceived colour rendering, Hunt effect, proposed CQS metric, vision experiments.  





Dr. Ming Ronnier Luo

Ming Ronnier Luo is Professor at Zheijiang University, Hangzhou, China and Professor of Colour and Imaging Science at the University of Leeds, UK. He is also Director of Division 1 (Colour and Vision) of the Commission International de l’Eclairage (CIE). He received his PhD in 1986 at the University of Bradford. He has over 350 publications in the field of colour appearance modelling, colour difference evaluation and colour management of digital imaging products. He is a Fellow of the Society of Dyers and Colourists and the Society for Imaging Science and Technology. He chairs two CIE Technical Committees and has received various research medals from different learned societies.

Dr. Janos Schanda

Professor Emeritus of the University of Veszprém, Hungary
He headed there the Department of Image Processing and Neurocomputing. Since his retirement he is Professor Emeritus and advisor for the “Virtual Reality and Imaging Laboratory”.
During the nineteen eighties and nineteen nineties he worked for the International Commission on Illumination (CIE) as its General Secretary and later Technical Manager. He served also in a number of honorary positions of the CIE, is Past Vice President, has chaired several Technical Committees, among others dealing with fundamentals of photometry, colorimetry and colour rendering. He is Honorary President of the Hungarian Lighting Society.
Dr. Schanda is member of the Optical Society of America, of The Society for Imaging Science and Technology and of several Hungarian Societies in the field of light and lighting and optical measurement. He served also on the Board of the International Colour Association (AIC) as its vice-president. He is recipient of the Newton Medal of the British Colour Group and of the De Boer Pin of the CIE.
He is on the editorial / international advisory board of Color Res. & Appl., USA, Lighting Research & Technology, UK and Journal of Light & Visual Environment, Japan. He is author of over 500 technical papers and conference lectures.

Dr. Yoshi Ohno

Yoshi Ohno is a NIST Fellow and the Group Leader for Lighting and Color Group at Sensor Science Division, National Institute of Standards and Technology, USA.  His group maintains the national standards of the lumen, candela, and other photometric units and colorimetric scales for USA.  He received his Ph.D. in engineering from Kyoto University, Japan. He started his career at Panasonic Corp., Osaka Japan before joining NIST in 1992.  Yoshi Ohno is actively involved in research of photometry and colorimetry. Specific projects of interest include integrating sphere theory, luminous flux measurement, colorimetry of light sources, color rendering, spectroradiometry, photometry of flashing lights, and solid state lighting.  He served as Director of CIE Division 2 for 2007-2011, and currently serves as CIE Vicepresident Technical.  He is a Fellow of IESNA, NIST representative for CCPR, Chair of CCPR Working Group of Key Comparisons, and is active in technical committees in CIE, ISO, ANSI, and IESNA.  Ohno received several awards including the CIE de Boer Gold Pin Distinguished Service Award in 2007 and U.S. Department of Commerce Silver Medal Award in 2009.