BS-EN-ISO-15253-2000.pdf
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1、BRITISH STANDARD BS EN ISO 15253:2000 Incorporating Corrigendum No. 1 Ophthalmic optics and instruments Optical devices for low-vision aids The European Standard EN ISO 15253:2000 has the status of a British Standard ICS 01.040.11; 11.040.70; 11.180 ? Licensed Copy: sheffieldun sheffieldun, na, Fri
2、Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 15253:2000 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 effect on 15 November 2000 BSI 0
3、2 August 2002 ISBN 0 580 36632 4 National foreword This British Standard is the official English language version of EN ISO 15253:2000. It is identical with ISO 15253:2000. It supersedes BS 7522-1:1992 and BS 7522-2:1993 which are withdrawn. The UK participation in its preparation was entrusted by T
4、echnical Committee CH/78, Ophthalmic optics, to Subcommittee CH/78/8, Vision aids, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European p
5、ublications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the
6、 necessary provisions of a contract. Users are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on t
7、he interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the I
8、SO title page, pages ii to iv, pages 1 to 21, the annex ZA page, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 13964 Corrigendum No. 1 02 August 2002 Addi
9、tion of supersession details to national foreword Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15253 September 2000 ICS 01.004.70 English version Ophthalmic optics and instruments -
10、 Optical devices for enhancing low vision (ISO 15253:2000) Optique et instruments ophtalmiques - Dispositifs optiques pour malvoyants (ISO 15353:2000) Augenoptik und ophthalmische Instrumente - Vergrernde Sehhilfen fr Sehbehinderte (ISO 15253:2000) This European Standard was approved by CEN on 15 Se
11、ptember 2000. 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
12、 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 under the responsibility of a CEN member into its own language and notified to the Central
13、 Secretariat 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.
14、EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15253:2000 E Lice
15、nsed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of the International Standard ISO 15253:2000 has been prepared by Technical Committee ISO/TC 172 “Optics and optical instruments“ in collaboration with Technical Committee CEN/TC
16、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 March 2001, and conflicting national standards shall be withdrawn at the latest by
17、 March 2001. 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 Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands
18、, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 15253:2000 was approved by CEN as a European Standard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative
19、). EN ISO 15253:2000 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 15253:2000(E) INTERNATIONAL STANDARD ISO 15253 First edition 2000-09-15 Ophthalmic optics and instruments Optical devices for enhancing low vision Opti
20、que et instruments ophtalmiques Dispositifs optiques pour malvoyants EN ISO 15253:2000 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii EN ISO 15253:2000 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncon
21、trolled Copy, (c) BSI iii Contents Page Foreword.iv 1 Scope 1 2 Normative references1 3 Terms and definitions .1 4 Classification6 4.1 Magnifiers.6 4.2 Telescopes Distance vision.6 4.3 Telescopes Near-vision/telemicroscopes 6 4.4 Telescopes Adjustable .6 5 Requirements.6 5.1 Optical characteristics
22、6 5.2 Materials and construction.8 6 Environmental conditions of use.8 7 Test methods9 7.1 General9 7.2 Equivalent power Magnifiers .9 7.3 Angular magnification Telescopes9 7.4 Resolution test.9 7.5 Determination of lateral variation of magnification13 8 Marking and instructions for use.13 8.1 Marki
23、ng.13 8.2 Information to be provided by the manufacturer .13 Annex A (informative) Determination of lateral variation of magnification.14 Annex B (informative) List of equivalent terms19 EN ISO 15253:2000 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 09:56:47 GMT+00:00 2006, Uncontrolled Co
24、py, (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 subjec
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