1、BRITISH STANDARDBS EN ISO 8980-4:2006Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-reflective coatingsThe European Standard EN ISO 8980-4:2006 has the status of a British StandardICS 11.040.70g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g
2、37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 8980-4:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006IS
3、BN 0 580 49243 4National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 8980-4:2006. It supersedes BS EN ISO 8980-4:2000 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee CH/172, Ophthalmic optics, to Subcommitt
4、ee CH/172/3, Spectacles. A list of organizations represented on CH/172/3 can be 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. Compliance with a British Standard cannot c
5、onfer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8980-4August 2006ICS 11.040.70 Supersedes EN ISO 8980-4:2000 English VersionOphthalmic optics - Uncut finished spectacle lenses - Part 4:Specifications
6、 and test methods for anti-reflective coatings (ISO8980-4:2006)Optique ophtalmique - Verres de lunettes finis non dtours- Partie 4: Spcifications et mthodes dessai relatives auxtraitements antireflet (ISO 8980-4:2006)Augenoptik - Rohkantige fertige Brillenglser - Teil 4:Anforderungen und Prfverfahre
7、n fr reflexminderndeVergtungen (ISO 8980-4:2006)This European Standard was approved by CEN on 7 August 2006.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 standard without any alterati
8、on. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained 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
9、under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Ic
10、eland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de St
11、assart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8980-4:2006: EForeword This document (EN ISO 8980-4:2006) has been prepared by Technical Committee ISO/TC 172 “Optics and optical instruments“ in col
12、laboration with 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 February 2007, and conflicting national
13、 standards shall be withdrawn at the latest by February 2007. This document supersedes EN ISO 8980-4:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech
14、 Republic, 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. Endorsement notice The text of ISO 8980-4:2006 has
15、 been approved by CEN as EN ISO 8980-4:2006 without any modifications. EN ISO 8980-4:2006Reference numberISO 8980-4:2006(E)INTERNATIONAL STANDARD ISO8980-4Second edition2006-08-15Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-reflective coatings Op
16、tique ophtalmique Verres de lunettes finis non dtours Partie 4: Spcifications et mthodes dessai relatives aux traitements antireflet EN ISO 8980-4:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Requirements 2 4.1 General requirements. 2 4.2 Lu
17、minous and mean reflectances. 2 4.3 Usable diameter of coated area. 2 4.4 Durability . 2 5 Testing . 3 5.1 General. 3 5.2 Method of determination of reflectance . 3 5.3 Determination of spectral reflectance values 3 5.4 Determination of luminous reflectance 4 5.5 Determination of mean reflectance. 4
18、 5.6 Determination of durability 4 6 Information to be made available on request 5 7 Reference to this part of ISO 8980 5 Annex A (informative) Significance of Vand Min the description of anti-reflective coated lenses. 6 Annex B (normative) Environmental sequence 7 Annex C (normative) Rubbing sequen
19、ce procedure 9 Annex D (normative) Evaluation conditions 11 Annex E (informative) Examples of lenses passing and failing the visual evaluation . 13 Annex F (informative) Examples of environmental sequence. 14 Annex G (informative) Example of a rubbing tool and components. 16 Bibliography . 18 EN ISO
20、 8980-4:2006iv 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 in a subjec
21、t 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 Commission (IEC)
22、 on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committee
23、s are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be he
24、ld responsible for identifying any or all such patent rights. ISO 8980-4 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 7, Ophthalmic optics and instruments. This second edition cancels and replaces the first edition (ISO 8980-4:2000), which has been revised to
25、 include non-optical specifications. 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: Transmittance specifica
26、tions and test methods Part 4: Specifications and test methods for anti-reflective coatings Part 5: Minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant EN ISO 8980-4:20061Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-
27、reflective coatings 1 Scope This part of ISO 8980 specifies optical and non optical requirements, including durability, and test methods for anti-reflective coatings on spectacle lenses. This part of ISO 8980 does not deal with the following topics: transmittance and absorptance; the colour of the r
28、eflected light. 2 Normative references The following referenced 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 48, Ru
29、bber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 8980-1, Ophthalmic optics Uncut finished spectacle lenses Part 1: Specifications for single-vision and multifocal lenses ISO 8980-2, Ophthalmic optics Uncut finished spectacle lenses Part 2: Speci
30、fications for progressive power lenses ISO 8980-3, Ophthalmic optics Uncut finished spectacle lenses Part 3: Transmittance specifications and test methods ISO 13666, Ophthalmic optics Spectacle lenses Vocabulary ISO 14889, Ophthalmic optics Spectacle lenses Fundamental requirements for uncut finishe
31、d lenses EN ISO 8980-4:20062 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 13666 and the following apply. 3.1 durability of anti-reflective coating ability to resist deterioration of its reflectance characteristics, over time, in normal use NOTE 1
32、The major factors contributing to deterioration of an anti-reflective coating are rubbing, heat, UV radiation and humidity. NOTE 2 The main failure mechanism affecting the durability of anti-reflective coatings is a loss of adhesion. Therefore, requirements of this part of ISO 8980 are related to an
33、ti-reflective coating adhesion. 4 Requirements 4.1 General requirements Anti-reflective coated lenses shall comply with the general requirements concerning the finished spectacle lens specifications in: ISO 8980-1; ISO 8980-2; ISO 8980-3; ISO 14889. NOTE 1 For further information on the properties o
34、f anti-reflective coatings, see informative Annex A. NOTE 2 The reflectance characteristics of an anti-reflective coating should not significantly change due to deterioration of the coating in normal use. 4.2 Luminous and mean reflectances The luminous reflectance Vand the mean reflectance Mof an an
35、ti-reflective coated lens shall be determined by the method specified in 5.2. If the manufacturer specifies values for luminous and mean reflectances, the measured values shall not exceed the specified values by more than 20 %. When determined as described in 5.4, the luminous reflectance Vof any an
36、ti-reflective coated lens surface shall be less than 2,5 %. 4.3 Usable diameter of coated area The usable diameter of the coated area for uncut finished spectacle lenses shall be W (dn 4) mm, where dnis the nominal diameter of the lens, in millimetres, indicated by the manufacturer. 4.4 Durability U
37、nder the conditions described in the test method given in 5.6, five consecutively tested lenses shall be free of significant loss of adhesion as defined in 5.6.4. A product meets the durability requirements of this part of ISO 8980 if all five lenses tested satisfy this criterion. EN ISO 8980-4:2006
38、35 Testing 5.1 General This clause specifies type test methods for anti-reflective coatings on spectacle lenses. At least 24 h shall elapse after coating before any type test is carried out. Lenses shall be stored at a temperature of 20 C to 26 C. 5.2 Method of determination of reflectance 5.2.1 App
39、aratus Use any dual-beam or single-beam spectrophotometer with an incident angle not larger than 17 and with a measurement accuracy sufficient to give the value of the spectral reflectance at all wavelengths between 380 nm and 780 nm with an uncertainty of less than 0,1 % (for example, an anti-refle
40、ctive coating quoted as having 0,5 % reflectance may be measured as having 0,4 % to 0,6 % reflectance). The wavelength increment of measurement shall not be more than 5 nm. The spectral bandwidth (full width at half maximum, FWHM) shall not exceed 5 nm. The calibration specimen shall have a surface
41、curvature within 0,50 D of that of the spectacle lens to be tested. The back surface of this specimen shall be designed such that no reflection will interfere with the measurement (e.g. both frosted and painted matt black). The calibration specimen shall be of known refractive index n() (uncertainty
42、 n 0,001) and have no coating (which could affect its surface reflective properties). The surface shall be cleaned. 5.2.2 Spectacle lens preparation The surface of the spectacle lens under test shall have a radius of curvature not less than 80 mm. The back surface of the lens shall be designed such
43、that no reflection will interfere with the measurement (e.g. both frosted and painted matt black). The surface shall be cleaned. 5.2.3 Measurement Insert the calibration specimen and calibrate the spectrophotometer to give a value of 100 %. Then insert the spectacle lens. The spectrophotometer will
44、give the value of the spectacle lens to calibration specimen spectral reflectance ratio RT(), expressed as percentage. By using this technique, any error due to surface curvature will be eliminated. Measure the spectacle lens to calibration specimen spectral reflectance ratio over the range 380 nm t
45、o 780 nm, at least every 5 nm. 5.3 Determination of spectral reflectance values The value of the calibration specimen surface spectral reflectance RC() is calculated theoretically from the refractive index. ()()()2C11nRn=+The value of the spectacle lens surface spectral reflectance is calculated by
46、multiplying the calibration specimen spectral reflectance value by the spectacle lens-to-calibration specimen spectral reflectance ratio: () = RC() RT() EN ISO 8980-4:20064 5.4 Determination of luminous reflectance Calculate the luminous reflectance Vusing both the spectral reflectance values () and
47、 the equation given in ISO 13666. 5.5 Determination of mean reflectance Calculate the mean reflectance Musing both the spectral reflectance values () and the equation given in ISO 13666. 5.6 Determination of durability 5.6.1 Equipment and consumables 5.6.1.1 Apparatus, able to produce the environmen
48、tal cycles as specified in Annex B. 5.6.1.2 Rubbing tool, as specified in Annex C. 5.6.1.3 Inspection facility, as specified in Annex D. 5.6.2 Test specimens This test method is applicable to anti-reflective-(AR)coated and hard AR-coated lenses. Both sides of the lenses shall have a radius of curvat
49、ure not less than 70 mm. In order to evaluate a product, five lenses shall be tested. 5.6.3 Test method: Environmental cycling combined with rubbing sequences 5.6.3.1 Clean the lenses with soap and water. Rinse them and dry them with a soft, clean cloth. 5.6.3.2 Check the lenses according to the methods in Annex D. The test lenses shall not have defects such as peeling, scratches, crazing or diffusion. 5.6.3.3 Perform the rubbing sequence described in Annex C on both th
