1、April 2011 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、11.180.30; 13.180!$neu“1756682www.din.deDDIN EN ISO 24502Ergonomics Accessible design Specification of age-related luminance contrast for coloured light(ISO 24502:2010)English translation of DIN EN ISO 24502:2011-04Ergonomie Zugngliche Gestaltung Spezifikation des altersbezogenen Leuchtdichtekontras
3、tes fr farbiges Licht(ISO 24502:2010)Englische bersetzung von DIN EN ISO 24502:2011-04Ergonomie Conception accessible Spcification du contraste de luminance li lge pour la lumire colore(ISO 24502:2010)Traduction anglaise de DIN EN ISO 24502:2011-04www.beuth.deDocument comprises pagesIn case of doubt
4、, the German-language original shall be considered authoritative.1803.11 DIN EN ISO 24502:2011-04 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 159 “Ergonomics”, Subcommittee SC 5 “Ergonomics of the physical environment”, Worki
5、ng Group WG 5 “Physical environments for people with special requirements” in collaboration with Technical Committee CEN/TC 122 “Ergonomics” (Secretariat: DIN, Germany). The responsible German bodies involved in its preparation were the Normenausschuss Ergonomie (Ergonomics Standards Committee) and
6、the Normenausschuss Informationstechnik und Anwendungen (Information Technology and selected IT Applications Standards Committee), Joint Working Committee NA 023-00-02 GA Gemeinschaftsarbeitsausschuss NAErg/NIA: Grundlagen zur barrierefreien Gestaltung/ Accessibility. The DIN Standards corresponding
7、 to the International Standards referred to in this document are as follows: ISO 9241-302:2008 DIN EN ISO 9241-302:2009-06 ISO 9241-303:2008 DIN EN ISO 9241-303:2009-06 ISO/IEC Guide 71:2001 DIN-Fachbericht (DIN Technical Report) 131:2003 ISO/TR 22411:2008 DIN-Fachbericht (DIN Technical Report) ISO/
8、TR 224111)1)Under preparation. 2 DIN EN ISO 24502:2011-04 National Annex NA (informative) Bibliography DIN EN ISO 9241-302:2009-06, Ergonomics of human-system interaction Part 302: Terminology for electronic visual displays DIN EN ISO 9241-303:2009-06, Ergonomics of human-system interaction Part 303
9、: Requirements for electronic visual displays DIN-Fachbericht 131:2003, Guidelines for standards developers to address the needs of older persons and persons with disabilities German and English version CEN/CENELEC Guide 6 DIN-Fachbericht ISO/TR 224111), Ergonomics data and guidelines for the applic
10、ation of ISO/IEC Guide 71 to products and services to address the needs of older persons and persons with disabilities 1)Under preparation. 3 DIN EN ISO 24502:2011-04 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 24502 December 2010 ICS 11.180.30; 13.180
11、 English Version Ergonomics Accessible design Specification of age-related luminance contrast for coloured light (ISO 24502:2010) Ergonomie Conception accessible Spcification du contraste de luminance li lge pour la lumire colore (ISO 24502:2010) Ergonomie Zugngliche Gestaltung Spezifikation des alt
12、ersbezogenen Leuchtdichtekontrastes fr farbiges Licht (ISO 24502:2010) This European Standard was approved by CEN on 14 December 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national st
13、andard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in
14、 any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech R
15、epublic, Denmark, Estonia,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN D
16、E NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24502:2010: EContents Page Foreword .3 Introduction.4 1 Scope5 2 Normative
17、 references5 3 Terms and definitions .6 4 Age-related luminance contrast.7 5 Using age-related luminance contrast 10 Annex A (informative) An example of calculation and application of age-related luminance contrast.11 Bibliography14 2EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 Foreword This docum
18、ent (EN ISO 24502:2010) has been prepared by Technical Committee ISO/TC 159 “Ergonomics” in collaboration with Technical Committee CEN/TC 122 “Ergonomics” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an ide
19、ntical text or by endorsement, at the latest by June 2011, and conflicting national standards shall be withdrawn at the latest by June 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held resp
20、onsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finl
21、and, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 24502:2010 has been approved by CEN as a EN
22、ISO 24502:2010 without any modification. 3EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 Introduction Although the proportion of older people is increasing in many countries, the care for better visibility of signs and displays is not sufficiently taken for those older people. This prevents older pe
23、ople from actively being involved in social activities, as well as from living their life safely and comfortably. This International Standard provides a method of calculating age-related luminance contrast that can be used for assessing and designing signs and displays in our visual environment, so
24、that they are clearly visible to older people. This method calculates age-related luminance contrast for people aged from 10 to 79 years based on age-related photopic spectral luminous efficiency of the eye. This International Standard adopts the principles of accessible design given in ISO/IEC Guid
25、e 71 and amplified in ISO/TR 22411. 4EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 1 Scope This International Standard specifies the age-related luminance contrast of any two lights of different colour seen by a person at any age, by taking into account the age-related change of spectral luminous e
26、fficiency of the eye. This International Standard provides a basic method of calculation that can be applied to the design of lighting, visual signs and displays. It applies to light, self-luminous or reflected, in visual signs and displays seen under moderately bright conditions called photopic vis
27、ion and whose spectral radiance is known or measurable. It does not apply to light seen under darker conditions called mesopic or scotopic vision. This International Standard specifies the luminance contrast for people aged from 10 to 79 years who have had no medical treatment or surgery on their ey
28、es that may affect their spectral luminous efficiency. This International Standard does not apply to visual signs and displays seen by people with colour defects whose spectral luminous efficiency is different from those with normal colour vision, nor those seen by people with low vision. 2 Normativ
29、e references The following refererenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3864-1:1), Graphical symbols S
30、afety colours and safety signs Part 1: Design principles for safety signs and safety markings ISO 3864-4:2), Graphical symbols Safety colours and safety signs Part 4: Colorimetric and photometric properties of safety sign materials ISO 9241-302:2008, Ergonomics of human-system interaction Part 302:
31、Terminology for electronic visual displays ISO 9241-303:2008, Ergonomics of human-system interaction Part 303: Requirements for electronic visual displays ISO 23539/CIE S 010, Photometry The CIE system of physical photometry CIE 15, Colorimetry CIE 17.4-1987, International lighting vocabulary 1) To
32、be published. (Revision of ISO 3864-1:2002) 2) To be published. 5EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 3 Terms and definitions 3.1 luminous efficiency ratio of radiant flux weighted according to V() to the corresponding radiant flux CIE 17.4-1987 3.2 spectral luminous efficiency of a monoch
33、romatic radiation of wavelength (V() for photopic vision; V() for scotopic vision ratio of the radiant flux at wavelength mto that at wavelength , such that both radiations produce equally intense luminous sensations under specified photometric conditions and mis chosen so that the maximum value of
34、this ratio is equal to 1 NOTE 1 Adapted from CIE 17.4-1987. NOTE 2 The values for spectral luminous efficiency in photopic vision are given in ISO 23539/CIE S 010. 3.3 radiant flux power emitted, transformed or received in the form of radiation NOTE The radiant flux is expressed in watts (W). CIE 17
35、.4-1987 3.4 age-related photopic spectral luminous efficiency Va() spectral luminous efficiency defined as a function of age, a 3.5 luminance contrast ratio between the higher luminance, LH, and lower luminance, LL, that defines the feature to be detected NOTE 1 If measured by contrast modulation (o
36、r Michelson contrast) it is defined as: HLmHLL LCL L=+(1) or, if measured by contrast ratio (CR), it is defined as: HLCRLL= (2) NOTE 2 Contrast ratio, CR, is often used for high luminances. When near the luminance-detection threshold, some use the following form (also known as Weber contrast): HLwLL
37、 LCL= (3) NOTE 3 For some but not all displays, area-luminance targets can be used to approximate the luminances that define the feature to be detected because pixels are discrete and near-area luminance is sufficiently uniform. ISO 9241-302:2008 NOTE 4 Equation (2) is used in this International Sta
38、ndard. Equations (1) and (3) may also be used to calculate age-related luminance contrast. 6N1)National footnote: For reasons of consistency with the following definitions, the English term “luminous efficiency“ has been translated in the German version of this standard as Hellempfindlichkeit. In CI
39、E 17.4 it is translated as visueller Nutzeffekt. N1)EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 3.6 age-related luminance contrast Ca() luminance contrast defined as a function of age, a NOTE The formula is given in Equation (4). 3.7 photopic vision vision by the normal eye when it is adapted to
40、levels of luminance of at least several candelas per square metre CIE 17.4-1987 3.8 CIE standard photometric observer ideal observer having a relative spectral responsivity curve that conforms to the V() function for photopic vision or to the V() function for scotopic vision, and that complies with
41、the summation law implied in the definition of luminous flux CIE 17.4-1987 4 Age-related luminance contrast The equation for age-related luminance contrast, Ca, is derived from the luminance contrast equation in which the luminance term is accommodated to the value that takes into account the age-re
42、lated change of spectral luminous efficiency. See Table 1. Equation (4) shall be applied when age-related luminance contrast is calculated for light P1and light P2with spectral radiance of Le,1and Le,2, respectively. 780,1380780,2380()()eaaeaLVCLV =(4) for 780 780,1 ,2380 380() ()ea e aLV L V where
43、Cais the age-related luminance contrast for age, a; Le,1is the spectral radiance of light P1, expressed in Wm2sr1nm1; Le,2is the spectral radiance of light P2, expressed in Wm2sr1nm1; Va() is the age-related photopic spectral luminous efficiency of age, a, in years (values given in Table 1 in decade
44、 steps); is the wavelength width (5 nm). NOTE 1 Age, a, is expressed in years but specified in decade steps such as 10-19 or 20-29 years, as indicated in Table 1. For example, C20and V20() mean the age-related luminance contrast and age-related photopic spectral luminous efficiency function, respect
45、ively, averaged for people in their twenties. NOTE 2 Le,1and Le,2, as well as Va(), are tabulated in the range of 380 nm to 780 nm in 5 nm steps as shown in Table 1. in Equation (4) is therefore 5 nm. For more accurate calculation, the 1 nm width is applied by using interpolation. There are a few me
46、thods for interpolation recommended by the CIE depending on the spectral composition (see CIE 15). 7EN ISO 24502:2010 (E) DIN EN ISO 24502:2011-04 NOTE 3 The quantity is analogous to the luminance defined by the CIE, in which the standard luminous efficiency, V(), and the maximum luminous efficacy,
47、Km(683 lm/W), are used. 780,1380()eaLV NOTE 4 In the definition of luminance by the CIE, the continuous integral equation is used to avoid the effect of the wavelength width. In practice, summation of spectral radiance weighted by spectral luminous efficiency in 5 nm steps is adequate. NOTE 5 Equati
48、on (4) is derived from one of the definitions for luminance contrast using 780,1380()eaLV as a luminance component. Other definitions such as Michelson contrast (ISO 9241-302) may also be applied for the calculation of age-related luminance contrast. NOTE 6 Age-related change in Va() and its implication to the visual efficiency of light are described in ISO/TR 22411. Table 1 Age-related photopic
