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1 INTERNATIONAL STANDARD ISO Second edition Ophthalmic optics Uncut finished spectacle lenses Part 4: Specifications and test methods for anti-reflective coatings Optique ophtalmique Verres de lunettes finis non détourés Partie 4: Spécifications et méthodes d'essai relatives aux traitements antireflet Reference number ISO :2006(E) ISO 2006
3 Contents Page Foreword... iv 1 Scope Normative references Terms and definitions Requirements General requirements Luminous and mean reflectances Usable diameter of coated area Durability Testing General Method of determination of reflectance Determination of spectral reflectance values Determination of luminous reflectance Determination of mean reflectance Determination of durability Information to be made available on request Reference to this part of ISO Annex A (informative) Significance of ρ V and ρ 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 Annex E (informative) Examples of lenses passing and failing the visual evaluation Annex F (informative) Examples of environmental sequence Annex G (informative) Example of a rubbing tool and components Bibliography ISO 2006 All rights reserved iii
4 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 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 Commission (IEC) 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 committees 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 held responsible for identifying any or all such patent rights. ISO 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 :2000), which has been revised 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 specifications 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 iv ISO 2006 All rights reserved
5 INTERNATIONAL STANDARD ISO :2006(E) 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. This 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 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 , Ophthalmic optics Uncut finished spectacle lenses Part 1: Specifications for single-vision and multifocal lenses ISO , Ophthalmic optics Uncut finished spectacle lenses Part 2: Specifications for progressive power lenses ISO , 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 finished lenses ISO 2006 All rights reserved 1