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1、BRITISH STANDARD BS EN ISO 8980-3:1999 BS 2738-9: 1999 Incorporating Corrigendum No. 1 Ophthalmic optics Uncut finished spectacle lenses Part 3: Transmittance specifications and test methods The European Standard EN ISO 8980-3:1999 has the status of a British Standard ICS 11.040.70 Licensed Copy: sh
2、effieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8980-3:1999 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into
3、effect on 15 December 1999 BSI 04-2000 ISBN 0 580 32701 9 National foreword This British Standard is the English language version of EN ISO 8980-3:1999. It is identical with ISO 8980-3:1999. The UK participation in its preparation was entrusted by Technical Committee CH/78, Ophthalmic optics, to Sub
4、committee CH/78/3, Spectacle lenses, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and
5、European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to inte
6、rnational publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” faci
7、lity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obliga
8、tions. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendmen
9、ts incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments 10800December 1999 Secondary identifier corrected Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c)
10、BSI BS EN ISO 8980-3:1999 BSI 04-2000i Contents Page National forewordInside front cover Foreword2 Forewordiii Text of ISO 8980-31 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 1
11、6 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8980-3 June 1999 ICS 11.040.70 English version Ophthalmic optics Uncut finished spectacle lenses Part 3: Transmittance specifications and test methods (ISO 8980-3:1999) Optique ophtalmique
12、Verres de lunettes finis non dtours Partie 3: Spcifications relatives au facteur de transmission et mthodes dessai (ISO 8980-3:1999) Augenoptik Rohkantige fertige Brillenglser Teil 3: Transmissionsanforderungen und Prfverfahren (ISO 8980-3:1999) This European Standard was approved by CEN on 13 May 1
13、999. 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 obtained
14、 on application to the Central Secretariat 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 Central Secretar
15、iat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN Europ
16、ean Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8980-3:1999 E License
17、d Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8980-3:1999 BSI 04-2000 2 Foreword The text of the International Standard ISO 8980-3:1999 has been prepared by Technical Committee ISO/TC 172 “Optics and optical instruments” in collaboration w
18、ith Technical Committee CEN/TC 170 “Ophthalmic optics”, 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 the latest by December 1999, and conflicting national standards s
19、hall be withdrawn at the latest by December 1999. EN ISO 8980 consists of the following parts under the general title Ophthalmic optics Uncut finished spectacle lenses: Part 1: Specifications for single-vision and multifocal lenses; Part 2: Specifications for progressive power lenses; Part 3: Transm
20、ission specifications and test methods; Part 4: Specifications and test methods for anti-reflection coatings. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Repu
21、blic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 8980-3:1999 was approved by CEN as a European Standard without any mod
22、ification. NOTENormative references to International Standards are listed in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled C
23、opy, (c) BSI EN ISO 8980-3:1999 ii BSI 04-2000 Contents Page Forewordiii 1Scope1 2Normative references1 3Terms and definitions1 4Classification1 5Requirements1 6Testing3 7Information to be supplied5 Annex A (normative) Spectral weighting functions for calculating relative visual attenuation quotient
24、s6 Annex B (normative) Calculation of solar UV transmittance values7 Annex C (informative) Spectral radiation risks9 Annex ZA (normative) Normative references to international publications with their corresponding European publicationsInside back cover Bibliography10 Figure 1 Principle of apparatus
25、for determination of plane of polarization5 Table 1 Categories for luminous transmittance and the related permissible transmittance in the ultraviolet solar spectral range2 Table A.1 Product of the spectral distribution of radiation of signal lights and of standard illuminant D 65 and the spectral l
26、uminous efficiency function of the average human eye for daylight vision6 Table B.1 Spectral functions for the calculation of solar UV transmittance values and blue-light transmittance7 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO
27、8980-3:1999 BSI 04-2000iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested
28、 in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Comm
29、ission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
30、an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 8980-3 was prepared by ISO/TC 172, Optics and optical instruments, Subcommittee SC 7, Ophthalmic optics and instruments. ISO 8980 consists of the following parts, under the ge
31、neral title Ophthalmic optics Uncut finished spectacle lenses: Part 1: Specifications for single-vision and multifocal lenses; Part 2: Specifications for progressive power lenses; Part 3: Transmittance specifications and test methods; Part 4: Specifications and test methods for anti-reflection coati
32、ngs. Annex A and Annex B form a normative part of this part of ISO 8980. Annex C is for information only. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006
33、, Uncontrolled Copy, (c) BSI EN ISO 8980-3:1999 BSI 04-20001 1 Scope This part of ISO 8980 specifies requirements for the transmittance properties of uncut finished spectacle lenses. This part of ISO 8980 is not applicable to: spectacle lenses having particular transmittance or absorption characteri
34、stics prescribed for medical reasons; products where specific personal protective equipment transmittance standards apply. NOTEOptical and geometric requirements for uncut finished spectacle lenses are specified in ISO 8980-1 and ISO 8980-2. 2 Normative references The following normative documents c
35、ontain provisions which, through reference in this text, constitute provisions of this part of ISO 8980. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 8980 are encouraged to investigat
36、e the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 13666:1998, Ophthalmi
37、c optics Spectacle lenses Vocabulary. ISO 14889:1997, Ophthalmic optics Fundamental requirements for uncut finished spectacle lenses. ISO/CIE 10526:1991, CIE standard colorimetric illuminants1). ISO/CIE 10527:1991, CIE standard colorimetric observers. 3 Terms and definitions For the purposes of this
38、 part of ISO 8980, the terms and definitions given in ISO 13666 apply. 4 Classification Spectacle lenses are classified with respect to transmittance as follows: a) clear spectacle lenses; b) uniformly tinted spectacle lenses; c) gradient-tinted spectacle lenses; d) photochromic spectacle lenses; e)
39、 polarizing spectacle lenses. NOTETwo or more of the above classifications may be combined. 5 Requirements 5.1 General The requirements shall apply at a temperature of 23 C 5 C, and shall apply to the design reference point, unless specified otherwise. Measurements shall be made with a test beam hav
40、ing a minimum width of 5 mm in any direction. 5.2 General transmittance requirements The general transmittance requirements specified in ISO 14889 shall apply. Spectacle lenses shall be attributed to one of five luminous transmittance categories as specified in Table 1, and shall be tested as descri
41、bed in clause 6. NOTETable 1 also includes the UV requirements for spectacle lenses, but those spectacle lenses of category 0 for which no specific claim is made as to UV transmittance performance are excluded from the UV requirements of Table 1. For categories 0, 1, 2 and 3, the luminous transmitta
42、nce V of the spectacle lens at the design reference point shall not lie outside the limits of the stated category by more than 2 % absolute. For category 4, the luminous transmittance v of the spectacle lens at the design reference point shall not lie outside the limits of that category by more than
43、 20 % relative to the stated luminous transmittance. 5.3 Requirements for driving Spectacle lenses to be used by vehicle drivers shall conform to the specific requirements for transmittance specified in ISO 14889. 5.4 Transmittance requirements for special types of spectacle lenses 5.4.1 Photochromi
44、c spectacle lenses 5.4.1.1 General When tested by the methods described in 6.5, the luminous transmittance values of a photochromic spectacle lens in its faded and in its darkened states shall be used to identify the appropriate categories in accordance with Table 1. 5.4.1.2 Photochromic response Wh
45、en tested by the methods described in 6.5.3.1 to 6.5.3.3, the ratio of the luminous transmittance of a photochromic specimen (see 6.5.1) in its faded state V(0) and, after 15 min irradiation, in its darkened state V(15) shall be at least 1,25. That is: 1) International Commission on Illumination, Ke
46、gelgasse 27, A-1030 Vienna. (1) Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 16 06:42:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8980-3:1999 2 BSI 04-2000 Table 1 Categories for luminous transmittance and the related permissible transmittance in the ultraviolet solar spectral range
47、5.4.1.3 Photochromic response at various temperatures (optional) If photochromic temperature sensitivity is stated, it shall be determined by measuring the luminous transmittance of the specimen (see 6.5.1) in the darkened state V(15) using the procedure described in 6.5.3.6 at 5 C, 23 C and 35 C. N
48、OTEThe manufacturer may use additional temperatures, provided this information is given. 5.4.1.4 Photochromic response at moderate light levels (optional) If the photochromic response at moderate light levels is stated, it shall be determined by measuring the luminous transmittance of the specimen (
49、see 6.5.1) in the darkened state V(15) using the procedure described in 6.5.3.4 after exposure to the illumination specified in 6.5.2.1 attenuated to an intensity of 30 %. 5.4.2 Polarizing spectacle lenses When tested by the method described in 6.6, the ratio of the luminous transmittance values of a polarizing spectacle lens measured parallel and perpendicular to the plane of polarization shall be greater than 8 : 1 for categories 2, 3, 4 and shall be greater than 4 : 1 for category 1. If t