1、BSI Standards Publication Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires PD IEC/TR 62778:2014 Incorporating corrigendum July 2014PD IEC/TR 62778:2014 National foreword This Published Document is the UK implementation of IEC/TR 62778:2014, incorporati
2、ng corrigendum July 2014. It supersedes PD IEC/TR 62778:2012, which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee CPL/34, Lamps and Related Equipment, to Subcommittee CPL/34/1, Electric lamps. A list of organizations represented on this subcommittee can b
3、e obtained on request to its secretary. 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 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 87760 5 ICS 29.140.01 Com
4、pliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 July 2014. Amendments/corrigenda issued since publication Date Text affected 31 August 2014 Implementation of
5、IEC corrigendum July 2014: Formulas D.1 and D.2 amended PUBLISHED DOCUMENT IEC TR 62778 Edition 2.0 2014-06 TECHNICAL REPORT Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires INTERNATIONAL ELECTROTECHNICAL COMMISSION W ICS 29.140 PRICE CODE ISBN 978-2-8
6、322-1615-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside PD IEC/TR 62778:2014 2 IEC TR 62778:2014 IEC 2014 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references 6 3 Terms and
7、definitions 6 4 General . 11 5 Spectrum, colour temperature, and blue light hazard . 12 5.1 Calculation of blue light hazard quantities and photometric quantities from emission spectra . 12 5.2 Luminance and illuminance regimes that give rise to t maxvalues below 100 s 15 6 LED packages, LED modules
8、, lamps and luminaires 17 7 Measurement information flow . 18 7.1 Basic flow . 18 7.2 Conditions for the radiance measurement . 20 7.3 Special cases (I): Replacement by a lamp or LED module of another type 22 7.4 Special cases (II): Arrays and clusters of primary light sources . 22 8 Risk group clas
9、sification 22 Annex A (informative) Geometrical relations between radiance, irradiance and radiant intensity 23 Annex B (informative) Distance dependence of t maxfor a certain light source . 25 Annex C (informative) Summary of recommendations to assist the consistent application of IEC 62471 for the
10、 assessment of blue light hazard to light sources and luminaires . 27 C.1 General . 27 C.2 Situation of RG0 or RG1 classification not requiring radiance or irradiance measurement 27 C.2.1 Boundary conditions 27 C.2.2 True luminance values giving risk group not greater than RG1 27 C.2.3 Illuminance v
11、alues giving risk group not greater than RG1 . 28 C.3 Situation for the classification of light sources larger than 2,2 mm and luminaires using these light sources 29 C.4 Situation for the classification of light sources smaller than 2,2 mm and luminaires using these light sources 30 C.5 Situation f
12、or the classification of light sources that pose practical difficulties in measurements at 200 mm . 30 Annex D (informative) Detailed assessment of arrays and clusters of primary light sources, comprised of LED packages . 31 D.1 General . 31 D.2 Approach 31 D.2.1 Step by step assessment . 31 D.2.2 T
13、ype of arrays and additional steps . 32 D.2.3 Complete flowchart 34 D.3 Derivation of the formula for average radiance of the full array . 35 Bibliography 37 Figure 1 Blue light hazard efficacy of luminous radiation, K B,v , for a range of light sources from different technologies, and for a few typ
14、ical daylight spectra 13 PD IEC/TR 62778:2014IEC TR 62778:2014 IEC 2014 3 Figure 2 Comparison between the curves involved in calculating K B,v(the photopic eye sensitivity curve and the blue light spectral weighting function) and the CIE 1931 Y and Z curves involved in calculating the CIE 1931 x, y
15、colour coordinates 14 Figure 3 Correlation plot between the quantity (1 x y)/y, calculated from the CIE 1931 x, y colour coordinates, and the value of K B,v , for all the spectra analysed to generate Figure 1 . 15 Figure 4 Estimate of the luminance level where L B= 10 000 W/(m 2 . sr), border betwee
16、n RG1 (t max 100 s) and RG2 (t max100 s) and RG2 (t max 100 s) in the small source regime, as a function of CCT 16 Figure 6 Relation of illuminance E, distance d and intensity I . 20 Figure 7 Flow chart from the primary light source (in blue) to the luminaire based on this light source (in amber) .
17、21 Figure A.1 Schematic image of the situation considered in Annex A . 23 Figure B.1 General appearance of t maxas a function of viewing distance d, for any light source with homogeneous luminance L and diameter D 26 Figure C.1 Luminance values from Table C.1 in relation to the RG1/RG2 border as fun
18、ction of correlated colour temperature 28 Figure C.2 Illuminance values from Table C.2 in relation to the RG1/RG2 border as function of correlated colour temperature 29 Figure D.1 Examples of secondary lenses with identical light distribution and alignment 32 Figure D.2 Examples of LED arrays with b
19、are LED packages . 33 Figure D.3 Evaluation whether one or more LED elements fall in 11 mrad field of view at distance d 1. 33 Figure D.4 Complete flowchart of the detailed assessment of arrays and clusters of primary light sources . 35 Table 1 Correlation between exposure time and risk group 10 Tab
20、le C.1 Luminance values giving risk group not greater than RG1 28 Table C.2 Illuminance values giving risk group not greater than RG1 . 29 Table D.1 Applicability of steps 1 to 6 31 PD IEC/TR 62778:2014 4 IEC TR 62778:2014 IEC 2014 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ APPLICATION OF IEC 62471
21、 FOR THE ASSESSMENT OF BLUE LIGHT HAZARD TO LIGHT SOURCES AND LUMINAIRES FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote inte
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31、ect application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepar
32、e International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC TR 62778, which is a technical report, ha
33、s been prepared by subcommittee 34A: Lamps, of IEC technical committee 34: Lamps and related equipment. This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical change with r
34、espect to the previous edition: inclusion of the photobiological assessment of LED arrays (Annex D). PD IEC/TR 62778:2014IEC TR 62778:2014 IEC 2014 5 The text of this technical report is based on the following documents: Enquiry draft Report on voting 34A/1737/DTR 34A/1758/RVC Full information on th
35、e voting for the approval of this technical report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the s
36、tability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. I
37、MPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. PD IEC/TR 62778:2014 6 IEC TR 62778:2014 IEC 20
38、14 APPLICATION OF IEC 62471 FOR THE ASSESSMENT OF BLUE LIGHT HAZARD TO LIGHT SOURCES AND LUMINAIRES 1 Scope This Technical Report brings clarification and guidance concerning the assessment of blue light hazard of all lighting products which have the main emission in the visible spectrum (380 nm to
39、780 nm). By optical and spectral calculations, it is shown what the photobiological safety measurements as described in IEC 62471 tell us about the product and, if this product is intended to be a component in a higher level lighting product, how this information can be transferred from the componen
40、t product (e.g. the LED package, the LED module, or the lamp) to the higher level lighting product (e.g. the luminaire). A summary of recommendations to assist the consistent application of IEC 62471 to light sources and luminaires for the assessment of blue light hazard is given in Annex C. NOTE It
41、 is expected that HID and LED product safety standards will make reference to this Technical Report. 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 cite
42、d applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts), International Electrotechnical Vocabulary (available at ). IEC 62471:2006, Photobiological safety of lamps and lamp systems CIE S 017/E:2011, ILV: International
43、 Lighting Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62471:2006, CIE S 017/E:2011 and IEC 60050-845 as well as the following apply. 3.1 blue light hazard efficacy of luminous radiation K B,vquotient of blue light hazard quantity to th
44、e corresponding photometric quantity Note 1 to entry: Blue light hazard efficacy of luminous radiation is expressed in W/lm. Note 2 to entry: The quantity ( ) in the formula below can be replaced by L ( ) or E ( ). ) ( ) ( ) ( ( d d ) m v B, = V K B K where K m = 683 lm/W. Note 3 to entry: K B,v= L
45、B /L = E B /E. PD IEC/TR 62778:2014IEC TR 62778:2014 IEC 2014 7 3.2 blue light hazard efficiency of radiation Bratio of blue light hazard quantity to the corresponding radiometric quantity Note 1 to entry: The quantity ( ) in the formula below can be replaced by L ( ) or E ( ). ) ( ) ( ) ( d d = B B
46、3.3 correlated colour temperature CCT temperature of the Planckian radiator having the chromaticity nearest the chromaticity associated with the given spectral distribution on a diagram where the (CIE 1931 standard observer based) u, 2/3 v coordinates of the Planckian locus and the test stimulus are
47、 depicted Note 1 to entry: Correlated colour temperature is expressed in kelvin (K). Note 2 to entry: The concept of correlated colour temperature should not be used if the chromaticity of the test source differs more than 2 2 1 2 10 5 9 4 = + = 2 p t p t ) ( ) ( v v u u C from the Planckian radiato
48、r, where u t , v trefer to the test source, u p , v pto the Planckian radiator. Note 3 to entry: Correlated colour temperature can be calculated by a simple minimum search computer program that searches for that Planckian temperature that provides the smallest chromaticity difference between the tes
49、t chromaticity and the Planckian locus, or e.g. by a method recommended by Robertson, A. R. “Computation of correlated color temperature and distribution temperature”, J. Opt. Soc. Am. 58, 1528-1535, 1968. (Note that the values in some of the tables in this reference are not up-to-date). SOURCE: CIE S 017/E:2011, 17-258, modified T cpis not referenced. 3.4 illuminance E quoti
