COMMISSION INTERNATIONALE DE L'ÉCLAIRAGE - Hongrie

INTERNATIONAL COMMISSION ON ILLUMINATION CIE - Hungary

INTERNATIONALE BELEUCHTUNGSKOMMISSION CIE - Ungarn
CIE PRESS RELEASE - 2012

September 2012

CIE 203:2012 incl. Erratum 1                                           ISBN 978 3 902842 43 5                                                 
A Computerized Approach to Transmission and Absorption Characteristics of the Human Eye
(Including Erratum 1)


There has long been a need for a series of reference spectral transmission and absorption data for the human eye for applications in eye research and optical safety studies. TC 6-15 collected spectral data from the literature and determined from that literature the best form for the wavelength dependence of the transmission and absorption of the components of the human eye. After critical review, the data have been compiled in tabular form in comma-delimited computer-accessible data files. The tabulated data consist of the transmission and absorption data of the clear ocular media, including the cornea, the aqueous, the lens, and the vitreous of the young (< 10 years old) human eye and the rhesus eye for the wavelength range of 0,2 micrometer to 2,5 micrometer. Transmittance data of the total clear ocular media in the human eye for the wavelength range 0,3 micrometer to 0,7 micrometer and for ages between 1 year and 100 years are also tabulated. These data can be downloaded by readers of this Technical Report from the CIE website.

This publication corrects and replaces CIE 203:2012 "A Computerized Approach to Transmission and Absorption Characteristics of the Human Eye".

An Erratum is included that shows corrected Equations 4 and 5 as well as 2 changes in wording in Section 4.6.

The publication is written in English, with a short summary in French and German. It consists of 66 pages with 23 figures and 9 tables and is readily available at the National Committees of the CIE or at the web shop of the CIE (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

The price of this publication is EUR 135,-

(Members of the National Committees of the CIE get 66,7 % discount.)

iThe Erratum is freely downloadable from the CIE website at
(http://www.cie.co.at/index.php/LEFTMENUE/index.php?i_ca_id=296).


August 2012

CIE 173:2012                                                              ISBN 978 3 902842 40 4                                                     
Tubular Daylight Guidance Systems
(Including Erratum 1)


Tubular daylight guidance systems are linear devices that channel daylight into the core of a building. They consist of a light transport section with, at the outer end, some device for collecting natural light and, at the inner end, a means of distribution of light within the interior. Collectors may be either mechanical devices that actively focus and direct daylight (usually sunlight), or be passive devices that accept sunlight and skylight from part or whole sky hemisphere. The transport element is usually a tube lined with highly reflective or prismatic material or may contain lenses or other devices to redirect the light. Light is distributed in an interior by output components, commonly diffusers made of opal or prismatic material. The major emphasis of this Report is on passive zenithal systems, the most commercially successful type of daylight guidance being installed in many parts of the world.

The Report includes a contextual review of the technology of all generic types of daylight guidance system. The major part of the report is concerned with photometry of components and systems, design methods, maintenance issues in both design and use, energy aspects, cost and benefits, human factors and architectural issues in the context of passive zenithal systems. The report includes case studies showing good practice.

This publication corrects and replaces CIE 173:2006 "Tubular Daylight Guidance Systems".

An Erratum is included that shows a corrected value in Table 3 and a corrected formula in Appendix C.

The publication is written in English, with a short summary in French and German. It consists of 75 pages with 44 figures and 5 tables and is readily available at the National Committees of the CIE or at the web shop of the CIE (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

The price of this publication is EUR 96,-

(Members of the National Committees of the CIE get 66,7 % discount.)

iThe Erratum is freely downloadable from the CIE website at (http://www.cie.co.at/index.php/LEFTMENUE/index.php?i_ca_id=296).


May 2012

CIE Draft Standard DS 014-6/E:2012                                                       
Colorimetry - Part 6: CIEDE2000 Colour- Difference Formula


The three-dimensional colour space produced by plotting CIE tristimulus values (X, Y, Z) in rectangular coordinates is not visually uniform, nor is the (x, y, Y) space nor the two-dimensional CIE (x, y) chromaticity diagram. Equal distances in these spaces and diagrams do not represent equally perceptible differences between colour stimuli. For this reason the CIE has standardized two more-nearly uniform colour spaces (known as CIELAB and CIELUV) whose coordinates are non-linear functions of X, Y and Z. Numerical values representing approximately the relative magnitude of colour differences can be described by simple Euclidean distances in these spaces or by more sophisticated colour-difference formulae that improve the correlation with the relative perceived size of differences. The purpose of this CIE Draft Standard is to define one such formula, the CIEDE2000 formula. The Draft Standard is based on CIE Technical Report 142-2001.

The formula is an extension of the CIE 1976 L*a*b* colour-difference formula (ISO 11664-4:2008(E)/CIE S 014-4/E:2007) with corrections for variation in colour- difference perception dependent on lightness, chroma, hue and chroma-hue interaction. Reference conditions define material and viewing environment characteristics to which the formula applies.

The Draft Standard is applicable to input values of CIELAB L*, a*, b* coordinates calculated according to ISO 11664-4:2008(E)/CIE S 014-4/E:2007. The Draft Standard may be used for the specification of the colour difference between two colour stimuli perceived as belonging to reflecting or transmitting objects. This includes displays, if they are being used to simulate reflecting or transmitting objects and if the tristimulus values representing the stimuli are appropriately normalized. The Draft Standard does not apply to colour stimuli perceived as belonging to areas that appear to be emitting light as primary light sources, or that appear to be specularly reflecting such light.

The Draft Standard has been sent to CIE National Committees for comments and sales to interested parties. It is still subject to changes and may not yet be referred to as a CIE Standard. When approved by the CIE NCs, it will be published as a CIE Standard and later on as a joint ISO/CIE Standard. The Draft Standard is readily available at the National Committees of the CIE or via the CIE Webshop.

Price of this Draft Standard: EUR 72,-

(Members of the National Committees of the CIE get 66,7 % discount.)


April 2012

CIE 203:2012                                                                                                ISBN 978 3 902842 41 1
A Computerized Approach to Transmission and Absorption Characteristics of the Human Eye


There has long been a need for a series of reference spectral transmission and absorption data for the human eye for applications in eye research and optical safety studies. TC 6-15 collected spectral data from the literature and determined from that literature the best form for the wavelength dependence of the transmission and absorption of the components of the human eye. After critical review, the data have been compiled in tabular form in comma-delimited computer-accessible data files. The tabulated data consist of the transmission and absorption data of the clear ocular media, including the cornea, the aqueous, the lens, and the vitreous of the young (< 10 years old) human eye and the rhesus eye for the wavelength range of 0,2 mikrom. to 2,5 mikrom. Transmittance data of the total clear ocular media in the human eye for the wavelength range 0,3 ěm to 0,7 ěm and for ages between 1 year and 100 years are also tabulated. These data can be downloaded by readers of this Technical Report from the CIE website.

The publication is written in English, with a short summary in French and German. It consists of 66 pages with 23 figures and 9 tables and is readily available at the National Committees of the CIE or at the web shop of the CIE (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

Price of this Draft Standard: EUR 135,-.

(Members of the National Committees of the CIE get 66,7 % discount.)


March 2012

CIE Draft Standard DS 023/E:2012                 

Characterization of the Performance of Illuminance Meters and Luminance Meters

This Draft Standard defines quality indices characterizing the performance of illuminance and luminance meters in a general lighting measurement situation, and measurement procedures for the individual indices and standard calibration conditions.

Measurements of illuminance or luminance and their accuracy are influenced by various parameters, such as operational conditions, properties of light sources, as well as characteristics of the applied photometers. The characteristics of these photometers alone do not allow the estimation of the measurement uncertainty for a specific measurement task. Nevertheless, it is generally true that instruments with “better” characteristics in most cases allow smaller uncertainties than instruments with “worse” properties. This Draft Standard has been written to:

  • give clear and unambiguous definitions for the individual quality indices;
  • define measurement procedures and methods for numerical evaluation of these measurement results;
  • define calibration conditions for illuminance meters and luminance meters.

The Draft Standard has been sent to CIE National Committees for comments and sales to interested parties. It is still subject to changes and may not yet be referred to as a CIE Standard. When approved by the CIE NCs, it will be published as a CIE Standard and later on as a joint ISO/CIE Standard. The Draft Standard is readily available at the National Committees of the CIE or via the CIE Webshop.

Price of this Draft Standard: EUR 135,-.

(Members of the National Committees of the CIE get 66,7 % discount.)


CIE PRESS RELEASE - 2011

CIE PRESS RELEASE - 2010

 

 

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