1、April 2013 Translation by DIN-Sprachendienst.English price group 13No 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、29.140.40!$L“1999341www.din.deDDIN EN 16268Performance of reflecting surfaces for luminaires;English version EN 16268:2013,English translation of DIN EN 16268:2013-04Bewertung von Reflektoroberflchen fr den Einsatz in Leuchten;Englische Fassung EN 16268:2013,Englische bersetzung von DIN EN 16268:201
3、3-04Performance des surfaces rflchissantes pour luminaires;Version anglaise EN 16268:2013,Traduction anglaise de DIN EN 16268:2013-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 26 pages 03.13 DIN EN 16268:2013-04 2 A comma is used a
4、s the decimal marker. National foreword This document (EN 16268:2013) has been prepared by Technical Committee CEN/TC 169 “Light and lighting” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Lichttechnik (Lighting Technology Standards Comm
5、ittee), Working Committee NA 058-00-21 AA Spiegelmaterial fr die Licht-technik. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 7668 DIN EN ISO 7668 ISO 9211-4 DIN ISO 9211-4 National Annex NA (informative) Bibliography DIN EN ISO 7668,
6、 Anodizing of aluminium and its alloys Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20 degrees, 45 degrees, 60 degrees or 85 degrees DIN ISO 9211-4, Optics and optical instruments Optical coatings Part 4: Specific test methods EUROPEAN STANDARD NOR
7、ME EUROPENNE EUROPISCHE NORM EN 16268 January 2013 ICS 29.140.40 English Version Perfomance of reflecting surfaces for luminaires Performance des surfaces rflchissantes pour luminaires Bewertung von Reflektoroberflchen fr den Einsatz in Leuchten This European Standard was approved by CEN on 1 Decemb
8、er 2012. 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 alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
9、ined 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 by translation under the responsibility of a CEN member into its own language and notified to the CE
10、N-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, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland
11、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Mar
12、nix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16268:2013: EEN 16268:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions 5 4 Measurement methods 6 4.1 Gen
13、eral . 6 4.2 Total reflectance tot. 7 4.3 Diffuse reflectance d. 8 4.4 Specular reflectance r, rL, rT. 8 4.5 Colour . 8 5 Durability test methods for evaluation of reflective materials based on maintained performance under different specified conditions . 8 5.1 General . 8 5.2 Temperature resistance
14、 . 9 5.3 Humidity resistance . 9 5.4 UV-Exposure resistance 9 5.5 Abrasion resistance . 9 5.6 Scratch resistance . 9 6 Classification 9 7 Assignment of Reflectance Class . 10 8 Presentation of performance data . 10 Annex A (normative) Measurement of total, diffuse and specular reflectance and colour
15、 13 A.1 General . 13 A.2 Measurement of total reflectance 13 A.3 Measurement of diffuse reflectance 16 A.4 Measurement of specular reflectance . 16 Annex B (normative) Measurement of abrasion and scratch resistance 18 B.1 Measurement of abrasion and wipe resistance according to ISO 9211-4:2012 . 18
16、B.2 Measurement of scratch-resistance according to ISO 15184:2012 18 Annex C (informative) Further important properties of reflective materials . 21 C.1 Cleaning 21 C.2 Solvent Resistance 21 Annex D (informative) Examples of structured surfaces . 22 Bibliography 24 DIN EN 16268:2013-04 EN 16268:2013
17、 (E) 3 Foreword This document (EN 16268:2013) has been prepared by Technical Committee CEN/TC 169 “Light and lighting”, 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 identical text or by endorsement, at t
18、he latest by July 2013, and conflicting national standards shall be withdrawn at the latest by July 2013. 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 responsible for identifying any or all
19、such patent rights. According to the 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 Ma
20、cedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16268:2013-04 EN 16268:2013 (E) 4 1 Scope This European stan
21、dard is applicable to the optical performance of untreated or coated materials supplied in plane sheet or strip form for use as a plane or formed reflector as well as preformed reflectors both as originally produced and after prescribed tests to determine probable maintained performance in service.
22、This includes: a) untreated base materials, including: 1) aluminium, 2) steel, 3) plastic, 4) glass. b) surface treated materials, including: 1) polished materials, 2) anodised materials, 3) vacuum metallised materials, 4) painted materials, 5) multilayer systems. This European Standard is not appli
23、cable to fluorescent materials. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenc
24、ed document (including any amendments) applies. EN 12665, Light and lighting Basic terms and criteria for specifying lighting requirements EN ISO 4892-3:2006, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps (ISO 4892-3:2006) EN ISO 6270-2:2005, Paints and varnis
25、hes Determination of resistance to humidity Part 2: Procedure for exposing test specimens in condensation-water atmospheres (ISO 6270-2:2005) ISO 7668, Anodizing of aluminium and its alloys Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20 degrees, 4
26、5 degrees, 60 degrees or 85 degrees ISO 9211-4:2012, Optics and photonics Optical coatings Part 4: Specific test methods ISO 15184:2012, Paints and varnishes Determination of film hardness by pencil test CIE 15.3:2004, Colorimetry CIE 130:1998, Practical methods for the measurement of reflectance an
27、d transmittance DIN EN 16268:2013-04 EN 16268:2013 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12665, CIE 130:1998 and the following apply. 3.1 light reflecting surface of a luminaire all reflecting surfaces of a luminaire with the main task
28、 of reflecting light and therefore with a total reflectance of at least 50 % 3.2 reflection process by which radiation is returned by a surface or a medium, without change of frequency of its monochromatic components 3.3 total reflectance reflectance tot ratio of the whole reflected luminous flux to
29、 the incident flux: ( ) ( ) ( )( ) ( )=00/dVSdVSitottot (1) where () is the total spectral reflectance of the sample; S() is the relative spectral power distribution of the incident radiation of standard illuminant A; totis the total luminous flux reflected by the sample; i is the total incident lum
30、inous flux on the sample, V() is the relative spectral weighting function of standard Observer at 2. 3.4 diffuse reflectance d ratio of the diffuse reflected part of the reflected luminous flux to the incident flux: ( ) ( ) ( )( ) ( )=00/dVSdVSdidd(2) where dis the diffuse spectral reflectance chara
31、cteristic of the sample; d is the diffuse reflected luminous flux; DIN EN 16268:2013-04 EN 16268:2013 (E) 6 i is the incident luminous flux; S() is the relative spectral power distribution of the incident radiation of standard illuminant A; V() is the relative spectral weighting function of standard
32、 Observer at 2. 3.5 specular reflectance regular reflectance r reflection in accordance with the laws of geometrical optics, without diffusion, expressed as the ratio of the regular reflected part of the reflected luminous flux to the incident luminous flux: ( ) ( ) ( )( ) ( )=00r/dVSdVSirr(3) where
33、 r() is the regular spectral reflectance characteristic of the sample; r is the specular reflected luminous flux; i is the incident luminous flux; S() is the relative spectral power distribution of the incident radiation; V() is the relative spectral weighting function of standard Observer at 2. 3.6
34、 reflectance class performance classification for reflecting materials determined from the total reflectance and expressed as a character from A+ to H indicating decreasing reflectance efficiency 4 Measurement methods 4.1 General The format of samples shall be plane and the minimum dimensions should
35、 be 100 mm x 100 mm. For formed reflectors, a plane sample of the reflector should be taken or a plane sample of the same material should be produced in the same manner as the final reflector. For materials manufactured by a linear process, measurements shall be made with the plane of incidence both
36、 parallel (i. e. longitudinal) to and perpendicular (i. e. transverse) to the linear process direction which shall be marked by the manufacturer on the samples, see Figure 1. The relevant symbols shall be marked by an index “L“ for longitudinal direction and by “T“ for transverse direction. DIN EN 1
37、6268:2013-04 EN 16268:2013 (E) 7 Key 1 sample a rolling direction b parallel direction c perpendicular direction Figure 1 Illustration of measurement parallel and perpendicular to the linear process direction For embossed structured surfaces, the width of the illuminated area on the sample inside th
38、e sphere according to Annex A shall be at least three times larger than the dimension of the structure. Depending on the kind of structure, measurements in three or four directions shall be considered. In Annex D, examples of structure are illustrated. NOTE Due to the undulating surface of embossed
39、materials, good contact between the sample and the rim of the sample port cannot be maintained at all points. The resulting light leakage can cause the results of measurements made on these materials to be lower than their actual total reflectance values. 4.2 Total reflectance tot The measurement sh
40、all be made in accordance with Annex A and documented. For materials manufactured by a linear process, measurements shall be made with the plane of incidence both parallel to and perpendicular to the linear process direction (see Figure 1). For all other materials measurement shall be done in two pe
41、rpendicular directions. Five measurements in each of these directions on different areas of the materials are required. The mean longitudinal value and the mean transverse value across all samples shall be calculated. The total reflectance shall be the higher value of the mean values. The uncertaint
42、y of the measurement process shall be documented, stating the percentage of uncertainty and the method by which the value was determined. DIN EN 16268:2013-04 EN 16268:2013 (E) 8 4.3 Diffuse reflectance dThe diffuse reflectance dshall be measured according to Annex A and documented. For materials ma
43、nufactured by a linear process, measurements shall be made with the plane of incidence both parallel to and perpendicular to the linear process direction (see Figure 1). For all other materials, measurement shall be done in two perpendicular directions. Five measurements in each of these directions
44、on different areas of the materials are required. The lowest longitudinal value and the lowest transverse value across all samples shall be recorded. NOTE For diffuse reflectance measurement, the lowest value is taken in order to avoid errors due to sample distortion causing the specular reflected l
45、ight to strike the edge of the sphere exit aperture. The diffuse reflection shall be the mean of the two recorded values. 4.4 Specular reflectance r, rL, rTMeasurement shall be made according to Annex A in both longitudinal and transverse directions. For nonlinear processed materials the measurement
46、s should be made in two perpendicular directions. Five measurements in each of these directions on different areas of the materials are required. The mean longitudinal value rLand the mean transverse value rTacross all samples shall be calculated. Values of transverse and longitudinal directions sha
47、ll both be stated. 4.5 Colour Colour shall be expressed in CIE L*a*b*-system using standard illuminant D65 (Daylight) (see CIE 15.3:2004). Five measurements at different points of the surface shall be measured and the average values L, a*, b* shall be taken. Measurements made before and after the du
48、rability tests shall be made using the same instrument and the same method. 5 Durability test methods for evaluation of reflective materials based on maintained performance under different specified conditions 5.1 General Different reflector materials show different rates of reflectance loss due to the effects of oxidation, humidity, UV exposure and abrasion. The durability tests used in this standard and described below are u
