1、January 2015 Translation by DIN-Sprachendienst.English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 11.040.70!%?D7“2283320www.din.deDDIN EN ISO 8598-1Optics and optical instruments Focimeters Part 1: General purpose instruments (ISO 8598-1:2014);English version EN ISO 8598-1:2014,English translation of DIN EN ISO 8598-1:2015-01Optik und optische Instrumente Scheitelbrechwert-Messgerte Teil 1: In
3、strumente fr den allgemeinen Gebrauch (ISO 8598-1:2014);Englische Fassung EN ISO 8598-1:2014,Englische bersetzung von DIN EN ISO 8598-1:2015-01Optique et instruments doptique Frontofocomtres Partie 1: Instruments pour cas gnraux (ISO 8598-1:2014);Version anglaise EN ISO 8598-1:2014,Traduction anglai
4、se de DIN EN ISO 8598-1:2015-01SupersedesDIN EN ISO 8598:1998-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.3501.15 DIN EN ISO 8598-1:2015-01 2 A comma is used as the decimal marker. National foreword This document (EN ISO 8598
5、-1:2014) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics”, Subcommittee SC 7 “Ophthalmic optics and instruments” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” (both secretariats are held by DIN, Germany). The responsible German body involved in it
6、s preparation was the DIN-Normenausschuss Feinmechanik und Optik (DIN Standards Committee Optics and Precision Mechanics), Working Committee NA 027-01-08 AA Augenoptik. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 7944 DIN EN ISO 794
7、4 ISO 8429 DIN EN ISO 8429 ISO 8980-1 DIN EN ISO 8980-1 ISO 8980-2 DIN EN ISO 8980-2 ISO 9342-1 DIN EN ISO 9342-1 ISO 9801 DIN EN ISO 9801 ISO 13666 DIN EN ISO 13666 ISO 18369-3 DIN EN ISO 18369-3 ISO 21987 DIN EN ISO 21987 ISO/TR 28980 DIN-Technical Report ISO/TR 28980 In Germany, use of the symbol
8、 “dpt” for dioptre (expressed in m1) is legally required and this symbol is to be used rather than the symbol “D” used in other countries. The same applies to the designation “cm/m” for “prism dioptres” which is normally used in Germany instead of the symbol “” used in this standard. Amendments This
9、 standard differs from DIN EN ISO 8598:1998-12 as follows: a) Clause 3 “Terms and definitions” has been extended; b) requirements for the lens support have been revised and rendered more precise (Subclause 4.5); c) a requirement for the axis marker has been specified (Subclause 4.6); d) requirements
10、 for the environmental conditions during use have been specified (Subclause 4.7); e) metrological requirements have been revised and rendered more precise (Clause 5); f) the test procedures for checking compliance with the precision requirements have been revised and rendered more precise (Clause 6)
11、; g) a requirement concerning the capability of measuring tinted lenses (and the respective test method) has been specified (Subclauses 5.3.5 and 6.9); h) requirements for marking and information to be supplied by the manufacturer have been specified (Clause 7); i) informative Annexes A, B and D hav
12、e been supplemented; j) the text of the revised version ISO 8598-1:2014 has been adopted in its entirety. Previous editions DIN 58209-1: 1980-02 DIN 58209-2: 1986-09 DIN EN ISO 8598: 1998-12 DIN EN ISO 8598-1:2015-01 3 National Annex NA (informative) Bibliography DIN EN ISO 7944, Optics and optical
13、instruments Reference wavelengths DIN EN ISO 8429, Optics and optical instruments Ophthalmology Graduated dial scale DIN EN ISO 8980-1, Ophthalmic optics Uncut finished spectacle lenses Part 1: Specifications for single-vision and multifocal lenses DIN EN ISO 8980-2, Ophthalmic optics Uncut finished
14、 spectacle lenses Part 2: Specifications for progressive power lenses DIN EN ISO 9342-1, Optics and optical instruments Test lenses for calibration of focimeters Part 1: Test lenses for focimeters used for measuring spectacle lenses DIN EN ISO 9801, Ophthalmic instruments Trial case lenses DIN EN IS
15、O 13666, Ophthalmic optics Spectacle lenses Vocabulary DIN EN ISO 18369-3, Ophthalmic optics Contact lenses Part 3: Measurement methods DIN EN ISO 21987, Ophthalmic optics Mounted spectacle lenses DIN-Fachbericht ISO/TR 28980, Ophthalmic optics Spectacle lenses Parameters affecting lens power measur
16、ement DIN EN ISO 8598-1:2015-01 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8598-1 September 2014 ICS 11.040.70 Supersedes EN ISO 8598:1998English Version Optics and optical instruments - Focimeters - Part 1: General CEN members are bound to comply wit
17、h 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 obtained on application to the CEN-CENELEC Manag
18、ement 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same sta
19、tus as the official versions. CEN members are the national standards bodies of 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, Malt
20、a, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN
21、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8598-1:2014 Epurpose instruments (ISO 8598-1:2014) Optique et instruments doptique - Frontofocomtres - Partie 1: Instruments pour cas gnraux (ISO 8598-1:2014)Optik und optische Instr
22、umente - Scheitelbrechwert-Messgerte - Teil 1: Instrumente fr den allgemeinen Gebrauch (ISO 8598-1:2014) This European Standard was approved by CEN on 22 April 2014. Contents Page Foreword 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions 5 4 Technical requirements for gene
23、ral purpose focimeters 7 5 Metrological requirements 9 5.1 General . 9 5.2 Reference wavelength 9 5.3 Performance requirement 9 6 Test procedures . 12 6.1 General . 12 6.2 Checking the indication errors 12 6.3 Checking the axis marker for the optical centre of lens . 12 6.4 Checking the alignment of
24、 the axis marker . 13 6.5 Checking the adjusting rail 13 6.6 Checking the non-symmetric error for automated focimeters 13 6.7 Checking the repeatability of vertex power measurement for automated focimeters 14 6.8 Checking for the centration error 14 6.9 Checking the capability of focimeters to measu
25、re tinted lenses 14 6.10 Checking the astigmatic axis repeatability for low-powered cylinder lens 14 6.11 Special procedures for eyepiece focimeters . 15 6.12 Criterion for image focusing in manual focusing focimeters 15 7 Marking . 15 7.1 Reference to ISO 8598-1 . 15 7.2 General information to be s
26、upplied by the manufacturer 15 7.3 Additional information to be supplied by the manufacturer 16 Annex A (informative) Use of correction values when measuring spectacle lenses 17 Annex B (informative) Example for evaluation of uncertainty of measurement for automated focimeters for general use . 22 A
27、nnex C (normative) Specifications of special reference lenses 28 Annex D (informative) Information for users on the performance of general purpose focimeters covered by this part of ISO 8598 . 30 Bibliography . 31 EN ISO 8598-1:2014 (E) DIN EN ISO 8598-1:2015-01 2 Foreword is held by DIN. This Europ
28、ean 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 2015. Attention is drawn to the possibility that some of the elements
29、 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 Regulations, the national standards organizations of the following c
30、ountries 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
31、 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. This document (EN ISO 8598-1:2014) has been prepared by Technical Committ
32、ee ISO/TC 172 “Optics and photonics” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the secretariat of which EN ISO 8598-1:2014 (E) DIN EN ISO 8598-1:2015-01 3 IntroductionGeneral purpose focimeters are intended for measurement of contact lenses, single-vision, multifocal a
33、nd progressive-power or degressive-power spectacle lenses, both uncut and mounted in spectacle frames, and for the orientation and marking of spectacle lenses.EN ISO 8598-1:2014 (E) DIN EN ISO 8598-1:2015-01 4 1 ScopeThis part of ISO 8598 specifies requirements and test methods for general purpose f
34、ocimeters designed for the measurement of vertex powers, cylinder axis, prismatic 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
35、 by the ophthalmic community, with the capability to demonstrate conformity of 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 edit
36、ion cited applies. For undated references, the latest edition of the referenced 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 instrume
37、nts 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 durin
38、g measurement and which is aligned perpendicularly to the optical axis of the focimeter and parallel to the axis direction 0 to 180Note 1 to entry: This is also called the lens table or frame rest.3.2capabilityability of a system or process to achieve the required performance3.3general purpose focim
39、eterinstrument that is used to measure vertex powers, cylinder axis and prismatic effects of spectacle and contact lenses, to orientate and mark uncut lenses, and to verify the correct mounting of lenses in spectacle framesEN ISO 8598-1:2014 (E) DIN EN ISO 8598-1:2015-01 5 3.3.1manual focusing focim
40、eterinstrument that allows the operator to view images formed by rays of light passing through a lens and, by manually focusing and adjusting, to measure the vertex power and identify the principal meridiansNote 1 to entry: For lenses with cylindrical power, the cylinder axis is found using the meth
41、od provided to locate the principal meridians of the lens in the area defined by the focimeter aperture. Prismatic power is measured separately for this type of focimeter.Note 2 to entry: There are sub-classes of manual focusing focimeter. One type has an eyepiece whereas the other has a projection
42、screen. With the eyepiece type, the measurement target is focused and viewed through an eyepiece.3.3.2automated focimeterinstrument that measures the vertex power of a lens, in the area defined by the focimeter aperture, in a single measurement without operator adjustment3.3.3continuously indicating
43、 focimeterfocimeter with a continuous scaleNote 1 to entry: For the purposes of this part of ISO 8598, this includes both automated instruments when set to 0,06 D or 0,01 D steps and conventional manual focusing instruments.3.3.4digitally rounding focimeterfocimeter which displays measured values ro
44、unded to the nearest 0,25 D or 0,12(5) D incremental value3.4centration error of the instrumentresidual prismatic error of the instrument with no lens in place3.5indicationof a focimeter quantitative value provided as the output of the focimeter3.6indication errordifference between the value indicat
45、ed by the focimeter and the true value of the reference lensNote 1 to entry: Here the true value of the reference lens, the back vertex power, is calculated using the four known basic lens parameters: radii of curvature of the front and back surface (r1and r2), the centre thickness (t), and the refr
46、active index (n) of the reference lens material, using the formulas listed in ISO 9342-1.Note 2 to entry: When using a measuring instrument, the influence of the uncertainty and indication error of the device should be considered.3.7lens supportmechanical interface of the instrument against which th
47、e spectacle lens or the contact lens is placed for measurementNote 1 to entry: The focimeter measures the vertex power related to the surface placed against the lens support.3.8near portion powervertex power measured at the near design reference point, as specified by the manufacturer, of a multifoc
48、al, progressive-power or degressive-power lensEN ISO 8598-1:2014 (E) DIN EN ISO 8598-1:2015-01 6 3.9non-symmetric error for cylindrical power and cylinder axisresidual error in the indicated cylindrical power and/or the indicated cylinder axis of a spherocylindrical lens for an automated focimeter after calibration3.10non-symmetric prism error of a focimeterdifference in the prismatic power readings when a plano-prism is measured first with its base setting in one direction and then in the
