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1、BRITISH STANDARD BS EN ISO 8980-4:2006 Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-reflective coatings The European Standard EN ISO 8980-4:2006 has the status of a British Standard ICS 11.040.70 ? Licensed Copy: sheffieldun sheffieldun, na, Fri
2、Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8980-4:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006 ISBN 0 580 49243 4 National foreword This British Standard was published by BSI. It is
3、 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 It supersedes BS EN ISO 8980-4:2000 which is withdrawn.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 Subcommittee CH/172/3, Spectacles. A list of organizations represented on CH/172/3 can be o
4、btained 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 confer immunity from legal obligations. Amendments issued since publication Amd.
5、No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8980-4 August 2006 ICS 11.040.70Supersedes EN ISO 8980-4:2000 English Version Ophthalmic optics - Uncut finished specta
6、cle lenses - Part 4: Specifications and test methods for anti-reflective coatings (ISO 8980-4:2006) Optique ophtalmique - Verres de lunettes finis non dtours - Partie 4: Spcifications et mthodes dessai relatives aux traitements antireflet (ISO 8980-4:2006) Augenoptik - Rohkantige fertige Brillenglse
7、r - Teil 4: Anforderungen und Prfverfahren fr reflexmindernde Vergtungen (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 European Standard the statu
8、s 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A ve
9、rsion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Est
10、onia, 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUR
11、OPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8980-4:2006: E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 200
12、6, Uncontrolled Copy, (c) BSI Foreword This document (EN ISO 8980-4:2006) has been prepared by Technical Committee ISO/TC 172 “Optics and optical instruments“ in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics“, the secretariat of which is held by DIN. This European Standard sha
13、ll 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 standards shall be withdrawn at the latest by February 2007. This document supersedes EN ISO 8980-4:2000. According to the CEN/CENELEC
14、 Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
15、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8980-4:2006 has been approved by CEN as EN ISO 8980-4:2006 without any modifications. EN ISO 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, F
16、ri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 8980-4:2006(E) INTERNATIONAL STANDARD ISO 8980-4 Second edition 2006-08-15 Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-reflective coatings Optique ophtalmique Ver
17、res de lunettes finis non dtours Partie 4: Spcifications et mthodes dessai relatives aux traitements antireflet EN ISO 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:0
18、7:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents 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 Luminous and mean reflectances. 2 4.3 Usable diameter of coated area. 2 4.4 Durability . 2 5 Testing . 3 5.1
19、 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 5.6 Determination of durability 4 6 Information to be made available on request 5 7 Reference to this par
20、t of ISO 8980 5 Annex A (informative) Significance of V and M in the description of anti-reflective coated lenses. 6 Annex B (normative) Environmental sequence 7 Annex C (normative) Rubbing sequence procedure 9 Annex D (normative) Evaluation conditions 11 Annex E (informative) Examples of lenses pas
21、sing 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 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled
22、 Copy, (c) BSI iv 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 sub
23、ject 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 (I
24、EC) 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 commit
25、tees 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
26、 held 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
27、 to 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 specif
28、ications 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 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Cop
29、y, (c) BSI 1 Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-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. T
30、his part of ISO 8980 does not deal with the following topics: transmittance and absorptance; the colour of the reflected 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
31、undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48, Rubber, 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
32、 single-vision and multifocal lenses ISO 8980-2, Ophthalmic optics Uncut finished spectacle lenses Part 2: Specifications for progressive power lenses ISO 8980-3, Ophthalmic optics Uncut finished spectacle lenses Part 3: Transmittance specifications and test methods ISO 13666, Ophthalmic optics Spec
33、tacle lenses Vocabulary ISO 14889, Ophthalmic optics Spectacle lenses Fundamental requirements for uncut finished lenses EN ISO 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 3 Terms and definitions For the purposes of this do
34、cument, 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 The major factors contributing to deterioration of an anti-reflective coating ar
35、e 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 anti-reflective coating adhesion. 4 Requirements 4.1 General requirements Anti-ref
36、lective 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 of anti-reflective coatings, see informative Annex A. NOTE 2 The reflectance char
37、acteristics 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 V and the mean reflectance M of an anti-reflective coated lens shall be determined by the method specified in 5.2.
38、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 V of any anti-reflective coated lens surface shall be less than 2,5 %. 4.3 Usable diamet
39、er of coated area The usable diameter of the coated area for uncut finished spectacle lenses shall be W (dn 4) mm, where dn is the nominal diameter of the lens, in millimetres, indicated by the manufacturer. 4.4 Durability Under the conditions described in the test method given in 5.6, five consecut
40、ively 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 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2
41、006, Uncontrolled Copy, (c) BSI 3 5 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 deter
42、mination of reflectance 5.2.1 Apparatus 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
43、0,1 % (for example, an anti-reflective 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 calibrati
44、on specimen shall have a surface 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
45、refractive index n() (uncertainty 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
46、 the lens shall be designed such 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
47、lens. The spectrophotometer will 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 reflecta
48、nce ratio over the range 380 nm to 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. ( ) ( ) ( ) 2 C 1 1 n R n = + The value of the spectacle len
49、s surface spectral reflectance is calculated by multiplying the calibration specimen spectral reflectance value by the spectacle lens-to-calibration specimen spectral reflectance ratio: () = RC() RT() EN ISO 8980-4:2006 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 10:07:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 5.4 Determination of luminous reflectance Calculate the luminous ref