www bzfxw com BRITISH STANDARD BS EN 61300 3 15 1997 IEC 61300 3 15 1995 Fibre optic interconnecting devices and passive components — Basic test and measurement procedures — Part 3 15 Examinations and[.]
BRITISH STANDARD Fibre optic interconnecting devices and passive components — Basic test and measurement procedures — Part 3.15: Examinations and measurements — Eccentricity of a convex polished ferrule endface The European Standard EN 61300-3-15:1997 has the status of a British Standard ICS 33.180.20 BS EN 61300-3-15: 1997 IEC 61300-3-15: 1995 BS EN 61300-3-15:1997 National foreword This British Standard is the English language version of EN 61300-3-15:1997 It is identical with IEC 61300-3-15:1995 The UK participation in its preparation was entrusted by Technical Committee EPL/86, Fibre optics, to Subcommittee EPL/86/2, Interconnecting devices and passive components, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary From January 1997, all IEC publications have the number 60000 added to the old number For instance, IEC 27-1 has been renumbered as IEC 60027-1 For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1997 © BSI 04-2000 ISBN 580 28507 Amendments issued since publication Amd No Date Comments BS EN 61300-3-15:1997 Contents National foreword Foreword Text of EN 61300-3-15 © BSI 04-2000 Page Inside front cover i ii blank EUROPEAN STANDARD EN 61300-3-15 NORME EUROPÉENNE August 1997 EUROPÄISCHE NORM ICS 33.180.20 English version Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-15: Examinations and measurements Eccentricity of a convex polished ferrule endface (IEC 61300-3-15:1995) Dispositifs d’interconnexion et composants passifs fibres optiques Méthodes fondamentales d’essais et de mesures Partie 3-15: Examens et mesures Excentricité de la face terminale d’un embout poli convexe (CEI 61300-3-15:1995) Lichtwellenleiter — Verbindungselemente und passive Bauteile — Grundlegende Prüf- und Meßverfahren Teil 3-15: Untersuchungen und Messungen — Exzentrizität eines konvex polierten Stiftes (IEC 61300-3-15:1995) ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This European Standard was approved by CENELEC on 1997-07-01 CENELEC 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 obtained on application to the Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1997 CENELEC — All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 61300-3-15:1997 E EN 61300-3-15:1997 Foreword The text of the International Standard IEC 61300-3-15:1995, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the formal vote and was approved by CENELEC as EN 61300-3-15 on 1997-07-01 without any modification The following dates were fixed: — latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-06-01 — latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-06-01 Contents Foreword General 1.1 Scope and object 1.2 General description 1.3 Normative reference Apparatus Procedure Details to be specified Figure — Definition of dome eccentricity Figure — Example of set-up for eccentricity measurement (method 1) Figure — Example of displacement of ring centre for ferrule rotation Figure — Example of set-up for eccentricity measurement (method 2) Page 3 4 4 Endorsement notice The text of the International Standard IEC 61300-3-15:1995 was approved by CENELEC as a European Standard without any modification ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 04-2000 EN 61300-3-15:1997 General 1.1 Scope and object The object of this part of IEC 1300 is to describe measurements of dome eccentricity of a spherically polished ferrule endface Two procedures are presented: a Newton ring method and an interference method 1.2 General description Dome eccentricity (X) is defined as the distance between the axis of the ferrule and the line parallel to the axis which passes through the vertex or highest point on the dome formed by spherically polishing the ferrule as shown in Figure The eccentricity may be directly determined as the distance between the centre of the fibre or fibre hole and the centre of the Newton ring or interference ring In this case, the eccentricity measurement will be affected by any misalignment of the measuring system, especially the angular offset between the ferrule axis and the interferometric axis The alignment of the measuring system shall be strictly checked and adjusted In both the Newton ring method and an interference method, errors due to misalignment of the measuring system can be reduced by rotating the ferrule around its axis and observing the maximum displacement of the centre of the Newton or interference rings The dome eccentricity is one-half of the maximum displacement 1.2.1 Method — Newton ring method (contacting method) In this method, the polished ferrule is pressed against a flat glass plate which is held perpendicular to the axis of the ferrule, and by using a microscope the Newton ring is observed The ferrule is rotated around its axis The displacement of the centre of the Newton ring is observed The eccentricity is determined as one-half of the maximum displacement 1.2.2 Method — Interference ring method (non-contacting method) This method uses an interferometer and a microscope with a TV camera Interference is created between the reference beam and the beam reflected from the ferrule endface, and the interference ring is observed The ferrule is rotated around its axis The displacement of the centre of the interference ring is observed The eccentricity is determined as one-half of the maximum displacement ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure — Definition of dome eccentricity © BSI 04-2000 EN 61300-3-15:1997 1.3 Normative reference Procedure The following normative document contains provisions which, through reference in this text, constitute provisions of this part of IEC 1300 At the time of publication, the edition indicated was valid All normative documents are subject to revision, and parties to agreements based on this part of IEC 1300 are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below Members of IEC and ISO maintain registers of currently valid International Standards ISO 2538:1974, Limits and fits — Series of angles and slopes on wedges and prisms 3.1 Method — Newton ring method Apparatus 2.1 Method — Newton ring method This method requires the following material: — a ferrule holder with a V-groove or precision sleeve mounted on a micro-manipulator (the ferrule holder shall be capable of holding the ferrule against the glass plate with a specified force According to ISO 2538, the preferred angle for the V-groove is 108°); — a flat glass plate perpendicular to the axis of the V-groove or precision sleeve; — a microscope; — a light source (white light) 2.2 Method — Interference ring method This method requires the following material: — a V-groove or precision sleeve mounted on a micro-manipulator (according to ISO 2538, the preferred angle for the V-groove is 108°); — an interferometer; — a microscope with TV camera; — a TV monitor; — a light source (example: He-Ne laser, monochromatic lamp) a) Place the ferrule in the V-groove or the precision sleeve b) Position the ferrule into a visual field of the microscope using the micro-manipulator c) Bring the ferrule into perpendicular contact with the glass plate and with the specified pressure at the ferrule/glass interface d) Observe the Newton ring and record the position of the centre of the ring (see Figure 2) e) Rotate the ferrule through 180° Record the second position of the centre of the ring f) Record the displacement 2X of the centre of the Newton ring The dome eccentricity is one-half of the displacement [see Figure a) and Figure b)] 3.2 Method — Interference ring method a) Place the ferrule in the V-groove or the precision sleeve b) Position the ferrule into a visual field of the TV screen using the micro-manipulator c) Observe the interference ring and record the position of the centre of the ring (see Figure 4) d) Rotate the ferrule through 180° Record the second position of the centre of the ring e) Record the displacement 2X of the centre of the interference ring The dome eccentricity is one-half of the maximum displacement [also see Figure a) and Figure b)] ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ NOTE In both methods, the eccentricity may be determined by recording three or more positions of the ring centre on its circle locus as the ferrule is rotated and by calculating the radius of the least squares circle Details to be specified The following details, as applicable, shall be specified in the detail specification: — magnification on microscope; — maximum allowable repeatability of measuring system; — allowable dome eccentricity © BSI 04-2000 EN 61300-3-15:1997 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure — Example of set-up for eccentricity measurement (method 1) © BSI 04-2000 EN 61300-3-15:1997 Figure a) — Ideal measurement when the measuring system has no misalignment ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure b) — Actual measurement when the measuring system has any angular offset Figure — Example of displacement of ring centre for ferrule rotation © BSI 04-2000 EN 61300-3-15:1997 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure — Example of set-up for eccentricity measurement (method 2) © BSI 04-2000 BS EN 61300-3-15: 1997 IEC 61300-3-15: 1995 BSI — 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