1、BSI Standards PublicationOptics and optical instruments FocimetersPart 1: General purpose instruments(ISO 8598-1:2014)BS EN ISO 8598-1:2014BS EN ISO 8598-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 8598-1:2014. Itsupersedes BS EN ISO 8598:1998 whi
2、ch is withdrawn.The UK draws the users attention to Note 2 in clause 6.12, whichassumes that a spherical lens is being measured. The UK committeetherefore recommends that if a cylindrical powered lens is beingmeasured, the best overall focus applies to each focal line in turn. The instructions in Cl
3、ause 6.11.1 for the setting up procedure for eyepiecefocimeters are appropriate for users with little ocular accommodation, i.e. presbyopes. Younger users with active accommodation are advisedto unscrew the eyepiece, and then slowly screw the eyepiece in until thecross hairs, not the target, just co
4、me into focus.The UK participation in its preparation was entrusted by TechnicalCommittee CH/172, Opthalmic optics, to Subcommittee CH/172/3,Spectacles.A list of organizations represented on this subcommittee can beobtained on request to its secretary.This publication does not purport to include all
5、 the necessary provisionsof a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 59969 9ICS 11.040.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Sta
6、ndard was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2014.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8598-1 September 2014 ICS 11.040.70 Supersedes EN ISO 8598:1998English Ver
7、sion Optics and optical instruments - Focimeters - Part 1: General purpose instruments (ISO 8598-1:2014) Optique et instruments doptique - Frontofocomtres - Partie 1: Instruments pour cas gnraux (ISO 8598-1:2014)Optik und optische Instrumente - Scheitelbrechwert-Messgerte - Teil 1: Instrumente fr de
8、n allgemeinen Gebrauch (ISO 8598-1:2014) This European Standard was approved by CEN on 22 April 2014. 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. U
9、p-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tran
10、slation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finla
11、nd, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATIO
12、N COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8598-1:2014 EBS EN ISO 8598-1:2014EN ISO 8598
13、-1:2014 (E) 3 Foreword This document (EN ISO 8598-1:2014) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics“ in collaboration 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
14、 national standard, either by publication of an identical text or by endorsement, at the latest by March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat
15、ent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 8598:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europe
16、an Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove
17、nia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 8598-1:2014 has been approved by CEN as EN ISO 8598-1:2014 without any modification. BS EN ISO 8598-1:2014EN ISO 8598-1:2014 (E) 3 Foreword This document (EN ISO 8598-1:2014) has been prepared by Techn
18、ical Committee ISO/TC 172 “Optics and photonics“ in collaboration 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
19、 the latest by March 2015, and conflicting national standards shall be ithdrawn at the latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or a
20、ll such patent rights. This document supersedes EN ISO 8598:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Es
21、tonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice Th
22、e text of ISO 8598-1:2014 has been approved by CEN as EN ISO 8598-1:2014 without any modification. BS EN ISO 8598-1:2014EN ISO 8598-1:2014 (E) 3 Foreword This document (EN ISO 8598-1:2014) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics“ in collaboration with Technical Comm
23、ittee 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 March 2015, and conflicting national standards shall be withdrawn the
24、latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 8598:1998. According to the CEN-
25、CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary
26、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norwa Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 8598-1:2014 has been approved by CEN as EN ISO 8598-1:2014 without any modi
27、fication. BS EN ISO 8598-1:2014ISO 8598-1:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Technical requirements for general purpose focimeters 35 Metrological requirements 55.1 General . 55.2 Reference wav
28、elength . 55.3 Performance requirement . 56 Test procedures . 86.1 General . 86.2 Checking the indication errors 86.3 Checking the axis marker for the optical centre of lens 86.4 Checking the alignment of the axis marker 96.5 Checking the adjusting rail . 96.6 Checking the non-symmetric error for au
29、tomated focimeters . 96.7 Checking the repeatability of vertex power measurement for automated focimeters 106.8 Checking for the centration error 106.9 Checking the capability of focimeters to measure tinted lenses .106.10 Checking the astigmatic axis repeatability for low-powered cylinder lens .106
30、.11 Special procedures for eyepiece focimeters . 116.12 Criterion for image focusing in manual focusing focimeters .117 Marking .117.1 Reference to ISO 8598-1 117.2 General information to be supplied by the manufacturer 117.3 Additional information to be supplied by the manufacturer .12Annex A (info
31、rmative) Use of correction values when measuring spectacle lenses 13Annex B (informative) Example for evaluation of uncertainty of measurement for automated focimeters for general use .18Annex C (normative) Specifications of special reference lenses 24Annex D (informative) Information for users on t
32、he performance of general purpose focimeters covered by this part of ISO 8598 .26Bibliography .27BS EN ISO 8598-1:2014ISO 8598-1:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
33、nternational 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
34、 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directi
35、ves, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some
36、 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarat
37、ions received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information abou
38、t ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 172, Optics and photonics, Subcommittee SC 7, Ophthalmic optics and instruments.This first edition of ISO 8
39、598-1 cancels and replaces ISO 8598:1996, of which it constitutes a technical revision. It also incorporates the Technical Corrigendum ISO 8598:1996/Cor.1:1998.ISO 8598 consists of the following parts, under the general title Optics and optical instruments Focimeters: Part 1: General purpose instrum
40、entsiv ISO 2014 All rights reservedBS EN ISO 8598-1:2014ISO 8598-1:2014(E)IntroductionGeneral purpose focimeters are intended for measurement of contact lenses, single-vision, multifocal and progressive-power or degressive-power spectacle lenses, both uncut and mounted in spectacle frames, and for t
41、he orientation and marking of spectacle lenses. ISO 2014 All rights reserved vBS EN ISO 8598-1:2014EN ISO 8598-1:2014 (E) 3 Foreword This document (EN ISO 8598-1:2014) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics“ in collaboration with Technical Committee CEN/TC 170 “Oph
42、thalmic 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 2015, and conflicting national standards shall be withdrawn at the latest by March 20
43、15. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 8598:1998. According to the CEN-CENELEC Internal R
44、egulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland
45、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 8598-1:2014 has been approved by CEN as EN ISO 8598-1:2014 without any modification. BS EN
46、ISO 8598-1:2014ISO 8598-1:2014(E)BS EN ISO 8598-1:2014Optics and optical instruments Focimeters Part 1: General purpose instruments1 ScopeThis part of ISO 8598 specifies requirements and test methods for general purpose focimeters designed for the measurement of vertex powers, cylinder axis, prismat
47、ic power and prism base setting within a restricted area at a specified location of a lens. This excludes instruments that can only measure the whole lens at once.It is applicable to instruments typically intended for use by the ophthalmic community, with the capability to demonstrate conformity of
48、lens products with the International Standards existing for these lenses.2 Normative referencesThe 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
49、 document (including any amendments) applies.ISO 7944, Optics and optical instruments Reference wavelengthsISO 8429, Optics and optical instruments Ophthalmology Graduated dial scaleISO 9342-1, Optics and optical instruments Test lenses for calibration of focimeters Part 1: Test lenses for focimeters used for measuring spectacle lenses3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1adjusting railmovable rail or bar used as the reference axis for spectacles during measurement and which is
