1、BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 Aerospace series - Spectral quality of LED luminaires used with photoluminescent marking systems BS EN 4731:2018 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4731 May 2018 ICS 29.140.99; 49.095 English Version
2、 Aerospace series - Spectral quality of LED luminaires used with photoluminescent marking systems Srie arospatiale - Qualit spectrale des luminaires diodes lectroluminescentes appliques aux systmes de marquage photoluminescents Luft- und Raumfahrt - Spektrale Qualitt von LED Leuchten zur Verwendung
3、mit langnachleuchtenden Markierungssystemen This European Standard was approved by CEN on 20 November 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterat
4、ion. 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 any other language made b
5、y 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 Republic, Denmark, Estonia,
6、 Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR
7、STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4731:2018 E National foreword T
8、his British Standard is the UK implementation of EN 4731:2018. The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology. A list of organizations represented on this committee can be obtained on request to its secretar
9、y. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018 ISBN 978 0 580 51082 3 ICS 29.140.40; 29.140.99; 49.020; 49.095 Compliance wit
10、h a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2018. Amendments/corrigenda issued since publication Date Text affected BRITISH STANDARD BS EN 4731:2018 EUROPEAN STAND
11、ARD NORME EUROPENNE EUROPISCHE NORM EN 4731 May 2018 ICS 29.140.99; 49.095 English Version Aerospace series - Spectral quality of LED luminaires used with photoluminescent marking systems Srie arospatiale - Qualit spectrale des luminaires diodes lectroluminescentes appliques aux systmes de marquage
12、photoluminescents Luft- und Raumfahrt - Spektrale Qualitt von LED Leuchten zur Verwendung mit langnachleuchtenden Markierungssystemen This European Standard was approved by CEN on 20 November 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
13、ns for giving this European Standard the status of a national standard 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
14、 three official versions (English, French, German). A version in 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 standard
15、s bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia
16、, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any mean
17、s reserved worldwide for CEN national Members. Ref. No. EN 4731:2018 E BS EN 4731:2018EN 4731:2018 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms, definitions and abbreviations . 5 4 Spectral quality 7 Annex A (informative) Approximated excitation
18、 spectrum 10 A.1 General . 10 A.2 Approximated excitation spectrum A() for typical photoluminescent pigments based on strontium aluminate 10 Annex B (informative) Examples of different light spectra . 11 B.1 Example for a single colour LED luminaire 11 B.2 Example for a multi-colour LED luminaire (w
19、hite primary mixed with blue primary) . 12 B.3 Example for a multi-colour LED luminaire (all RGBW primaries are mixed) 13 B.4 Example for a bi-colour LED luminaire (white and amber primaries are mixed) . 14 B.5 Example for a bi-colour LED luminaire (white and amber primaries are mixed) . 15 BS EN 47
20、31:2018EN 4731:2018 (E) 3 European foreword This document (EN 4731:2018) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received th
21、e approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2018, a
22、nd conflicting national standards shall be withdrawn at the latest by November 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the
23、 CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
24、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4731:2018EN 4731:2018 (E) 4 Introduction Photoluminescent marking systems are commonly us
25、ed in passenger airplanes to provide visual guidance in emergency events. Those marking systems need to be charged by ambient light during cabin preparation and/ or aircraft operation as to be operational if, at any phase of a flight, an emergency occurs. While the certification regulations require
26、photoluminescent marking system to be sufficiently charged solely by cabin interior lighting, i.e. without accounting for daylight entering the cabin through windows, only certain portions of the visual light spectrum emitted by a cabin interior luminaire are stored by the photoluminescent pigment a
27、nd thus contribute to charging. BS EN 4731:2018EN 4731:2018 (E) 5 1 Scope This document defines a measure for the spectral quality of LED luminaires in terms of the ratio of the amount of visual light emitted by the luminaire versus the amount effective for charging photoluminescent products contain
28、ed in that spectrum. Fulfilment of this document by a LED luminaire will ensure general compatibility of the luminaire with photoluminescent marking systems. This document alone does not provide any means of compliance to fulfil any airworthiness requirements. For a specific aircraft installation, t
29、he spectral power distribution and illuminance at the photoluminescent marking systems are relevant. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the ed
30、ition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4706, Aerospace series LED colour and brightness ranking CIE 018.2:1983, The basis of physical photometry 3 Terms, definitions and abbreviations For the purposes of this
31、document, the following terms, definitions and abbreviations apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.1 Lig
32、ht Emitting Diode LED solid state device embodying a p-n junction, emitting optical radiation when excited by an electric current 3.2 single colour LED luminaire luminaire using one or more LEDs as source of light whereas the luminaire is designed to operate in a single colour mode only 3.3 multiple
33、 colour LED luminaire luminaire using two or more LEDs as source of light whereas the LEDs are of at least two different primary wavelengths and the luminaire is designed to operate in two or more colour modes by controlling the light output of the different primaries independently BS EN 4731:2018EN
34、 4731:2018 (E) 6 3.4 spectral irradiance E() function that relates the spectral irradiance E of a light source to the wavelength Note 1 to entry: The functions unit is W/m/nm. 3.5 photopic luminosity function V() function that relates the average spectral sensitivity of human visual perception of br
35、ightness at photopic light levels to the wavelength Note 1 to entry: Published by the Commission Internationale de Lclairage (CIE) in steps of one nanometer with document CIE 018.2:1983. 3.6 photometrically weighted spectral irradiance EV() function that is the product of spectral irradiance E() and
36、 photopic luminosity function V(), and that relates the photometrically weighted spectral irradiance to the wavelength Note 1 to entry: The function spectral irradiances unit is W/m/nm. 3.7 photometrically weighted irradiance EV integral of the photometrically weighted spectral irradiance EV() over
37、the visual portion of the spectrum in the range of 360 nm to 780 nm Note 1 to entry: = ( ) =780 =360Note 2 to entry: The functions unit is W/m. Note 3 to entry: The photometrically weighted irradiance EV is proportional to the brightness perceived by the human eye or to the reading taken by a luxmet
38、er. The range of 781 nm to 830 nm is neglected for simplicity. 3.8 approximated excitation spectrum for typical photoluminescent pigments based on strontium aluminate A() linear function that represents an approximation of the spectral excitation sensitivity of common strontium aluminate (e.g. SrAl
39、2O 4) photoluminescent pigments related to the wavelength Note 1 to entry: ( ) = 1 130 + 3,7692 valid for: is element of 360 nm to 490 nm Note 2 to entry: Annex A illustrates the approximated excitation spectrum A(). BS EN 4731:2018EN 4731:2018 (E) 7 3.9 approximated weighted spectral excitation irr
40、adiance EA() function that is the product of spectral irradiance E() and approximated excitation spectrum A(), and that relates the approximated weighted spectral excitation irradiance to the wavelength Note 1 to entry: The functions unit is W/m/nm. 3.10 approximated weighted excitation irradiance E
41、A integral of the approximated weighted spectral excitation irradiance EA() over the portion of the spectrum that contributes to charging Note 1 to entry: = ( ) = 4 90 =360Note 2 to entry: The functions unit is W/m. 3.11 excitation coefficient Ce quotient that results from dividing the approximated
42、weighted excitation irradiance EA by the sum of approximated weighted excitation irradiance and the photometrically weighted irradiance EV Note 1 to entry: Ce = EA/(EA+EV) Ce is element of 0 to 1 Note 2 to entry: The excitation coefficient indicates the spectral quality of a light source in view of
43、charging strontium aluminate pigments relative to its brightness as perceived by the human eye or measured with a luxmeter. The bigger Ce is, the more effective is the light source with respect to charging of photoluminescent material. 4 Spectral quality 4.1 Method for determination of Ce for a lumi
44、naire 4.1.1 Single colour LED luminaires The excitation coefficient Ce for single colour LED luminaires shall be determined according to the following steps: 1. Record the luminaires spectral irradiance E() in steps of 1 nanometer (1 nm) in a steady state condition with a spectrometer in the wavelen
45、gth range of 360 nm to 780 nm and an optical bandwidth not greater than 5 nm; 2. Calculate the photometrically weighted spectral irradiance EV() by multiplying the spectral irradiance E() and photopic luminosity function V() in steps of every nanometer; 3. Calculate the approximated weighted spectra
46、l excitation irradiance EA() by multiplying the spectral irradiance E() and the approximated excitation spectrum A() in steps of every nanometer; 4. Calculate the photometrically weighted irradiance EV within in the range of 360 nm to 780 nm; BS EN 4731:2018EN 4731:2018 (E) 8 5. Calculate the approx
47、imated weighted excitation irradiance EA within the range of 360 nm to 490 nm; 6. Calculate Ce by dividing the approximated weighted excitation irradiance EA by the sum of EA and photometrically weighted irradiance EV. 4.1.2 Multiple colour LED luminaires The excitation coefficient Ce for multiple c
48、olour LED Luminaires shall be determined according to the following steps: 1. Define the parameters of a colour scenario that is dedicated to charging photoluminescent products; 2. Record the luminaires spectral irradiance E() in steps of 1 nanometer (1 nm) with the luminaire set to the colour scena
49、rio defined per step 1 in a steady state condition with a spectrometer in the wavelength range of 360 nm to 780 nm and an optical bandwidth not greater than 5 nm; 3. Calculate the photometrically weighted spectral irradiance EV() by multiplying the spectral irradiance E() and photopic luminosity func
