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1、BRITISH STANDARD BS EN 61300-3-16: 1997 IEC 61300-3-16: 1995 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3.16: Examinations and measurements Endface radius of spherically polished ferrules The European Standard EN 61300-3-16:1997 has the stat
2、us of a British Standard ICS 33.180.20 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-3-16:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the author
3、ity of the Standards Board and comes into effect on 15 November 1997 BSI 04-2000 ISBN 0 580 28506 5 National foreword This British Standard is the English language version of EN 61300-3-16:1997. It is identical with IEC 61300-3-16:1995. The UK participation in its preparation was entrusted by Techni
4、cal 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 chang
5、e, 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 1 January 1997, all IEC publications have the number 60000 added to
6、 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 norma
7、lly 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
8、 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
9、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 2 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpo
10、rated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-3-16:1997 BSI 04-2000i Contents Page Nationa
11、l forewordInside front cover Foreword2 Text of EN 61300-3-163 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDA
12、RD NORME EUROPENNE EUROPISCHE NORM EN 61300-3-16 August 1997 ICS 33.180.20 English version Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-16: Examinations and measurements Endface radius of spherically polished ferrules (IEC 61300-3-16:1995) D
13、ispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 3-16: Examens et mesures Rayon de la face terminale des embouts polis sphriquement (CEI 61300-3-16:1995) Lichtwellenleiter Verbindungselemente und passive Bauteile Grundlegende Prf- un
14、d Meverfahren Teil 3-16: Untersuchungen und Messungen Endflchenradius sphrisch polierter Stifte (IEC 61300-3-16:1995) 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
15、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 vers
16、ions (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
17、 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 Comit Europen de Normalisation Electrotechnique Europisches
18、 Komitee fr 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 61300-3-16:1997 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GM
19、T+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-3-16:1997 BSI 04-2000 2 Foreword The text of the International Standard IEC 61300-3-16:1995, 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
20、 by CENELEC as EN 61300-3-16 on 1997-07-01 without any modification. The following dates were fixed: Endorsement notice The text of the International Standard IEC 61300-3-16:1995 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 1General3 1.1Scope and o
21、bject3 1.2General description3 1.3Normative reference3 2Apparatus3 3Procedure4 4Details to be specified6 Figure 1 Radius of curvature of the endface3 Figure 2 Example of apparatus using method 1 (profiling)3 Figure 3 Example of apparatus using method 2 (interferometry)4 Figure 4 Measurements for cal
22、culating the radius of curvature5 Figure 55 Figure 66 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) 1
23、998-06-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-3-16:1997 BSI 04-20003 1 General 1.1 Scope and object The object of this part of IEC 1300 is to describe procedures for measuring the radius of the endface of a spherically p
24、olished ferrule. 1.2 General description The ferrule endface radius R is defined as the radius of curvature of the portion of the endface which is domed for physical contact polishing. It is assumed that the endface is spherical, although in practice the endface is often aspherical (see Figure 1). T
25、hree methods are described for measuring the endface radius. Method 1 Profiling the endface with a surface analyzer Method 2 Analyzing the separation of interference rings when the endface is imaged with an interferometer Method 3 Use of a profile projector to make a simple go/no go measurement of p
26、hysical contact and angled physical contact shaped endfaces. 1.3 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the edition indicated was valid. All normative document
27、s 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 25
28、38:1974, Limits and fits Series of angles and slopes on wedges and prisms. 2 Apparatus 2.1 Method 1 Profiling The apparatus consists of the following elements. 2.1.1 V-groove The V-groove axis is vertical or, in the case of the angled type ferrules, the V-groove fixture shall be adjusted according t
29、o the nominal angle of the ferrule tip. The preferred angle for a V-groove is 108 according to ISO 2538. 2.1.2 Profilometer A profilometer, equipped with a chisel type probe, is arranged so that the motion of the trace is perpendicular to the axis of the ferrule. 2.1.3 Chart recorder A chart recorde
30、r is used to record the trace of the profilometer as it moves across the endface of the ferrule. Figure 1 Radius of curvature of the endface Figure 2 Example of apparatus using method 1 (profiling) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c)
31、 BSI EN 61300-3-16:1997 4 BSI 04-2000 2.2 Method 2 Interferometry The apparatus consists of the following elements. 2.2.1 V-groove fixture This fixture is parallel to the viewing axis of a flat plate interferometer or a non-contact interferometer operating at a known wavelength. In the case of angle
32、d endface type ferrules, the V-groove fixture shall be adjusted according to the nominal angle of the ferrule endface. 2.2.2 Television camera and monitor This allows the display of the interference fringes that result from viewing the spherical endface with the interferometer. 2.2.3 Means of vision
33、 This may be manual or automatic and permits the determination of the diameter and location of at least two rings. 2.3 Method 3 Profile projector The apparatus consists of a profile projector having the following features: magnification of 20 minimum; simultaneous top and bottom side illumination; g
34、oniometer table; cross-hair chart; chart with the minimum and maximum profile of the object to be measured. 3 Procedure 3.1 Method 1 Profiling NOTEThe traces of some profilometers only show surface finish and may not accurately show the curvature of the surface. 3.1.1 Affix the ferrule in the V-groo
35、ve so that the portion of the ferrule closest to the end face is in contact with the V-groove. The length of the ferrule contacting the V-groove shall be two times the diameter of the ferrule in the contact area. 3.1.2 Adjust the chisel tip of the profilometer so that the bottom edge of the tip is p
36、erpendicular to the axis of the ferrule. 3.1.3 Adjust the apparatus so that the profilometer trace passes through the axis of the ferrule. 3.1.4 Cause the profilometer to trace across the surface of the endface, recording the displacement as a function of length on the chart recorder (see Figure 2).
37、 Figure 3 Example of apparatus using method 2 (interferometry) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-3-16:1997 BSI 04-20005 3.1.5 Calculate the vertical displacement of the probe at the highest point of the ferrule and at
38、two points equidistant from the highest point. Choose the points to cover an area approximately 500 4m in diameter. 3.1.6 Calculate the radius of curvature R (see Figure 4) from the following formula: where cis the length of the chord; his the height of the apex above the chord. For additional confi
39、dence, more points from the trace may be digitized and entered into a circle fit calculation. 3.2 Method 2 Interferometer measurement 3.2.1 Affix the ferrule to the V-groove and focus the interferometer to obtain the interference fringes in the area surrounding the bore at the centre of the ferrule
40、endface. 3.2.2 Measure the diameter of two rings designated as m and m+p, where ring m+p is larger than ring m. Choose the m and m+p diameters to cover an area of approximately 500 4m around the centre of the ferrule. Calculate the radius of curvature from the following equation: R = (D2m+p D2m)/4p2
41、 where Note that any two rings can be used to make the measurement. NOTEFor additional confidence, measure the diameter of three or more rings and calculate an average radius based on all the possible combinations of two ring diameters. 3.3 Method 3 Profile projector 3.3.1 For completely assembled c
42、onnectors, install the connector with its key oriented as required for the relevant connector design on the goniometer table. 3.3.2 Adjust the illumination and focusing mechanism of the projector to optimum visibility on the screen. 3.3.3 Install the chart with the connector ferrule minimum and maxi
43、mum shape on the projection screen. 3.3.4 Set the screen rotation dial to zero. 3.3.5 Using the goniometer fine adjustment align the image of the ferrule with the x-axis of the chart according to Figure 5, or according to Figure 6 with respect to angled endface connectors. 3.3.6 Move the goniometer
44、table along the x-axis to compare the image of the ferrule on the screen with the cross-hair pattern on the chart. Figure 4 Measurements for calculating the radius of curvature R c2 8h - -= Ris the calculated radius of curvature; Dm+pis the diameter of the m+p ring; Dmis the diameter of the m ring.
45、Figure 5 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-3-16:1997 6 BSI 04-2000 4 Details to be specified The following details, as applicable, shall be specified in the relevant specification: 4.1 Method 1 Profiling Type of stylus
46、 Contacting stylus shape Non-contacting stylus Requirements of V-groove Filtering Nominal angle of tilt if V-groove for angled endface connectors 4.2 Method 2 Interferometer Wavelength of monochromatic light source or equivalent wavelength of the filter used with a white-light interferometer Require
47、ments of V-groove Magnification of microscope Surface finish of endface Nominal angle of tilt of V-groove for angle endface connectors 4.3 Method 3 Profile projector Type of profile projector Cross-hair chart (e.g. radius, angle and diameter of ferrule) Connector key position Connector/ferrule mount
48、ing fixture (if required) Figure 6 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:28:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-3-16: 1997 IEC 61300-3-16: 1995 B
49、SI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the con