Bsi bs en 61300 3 15 1997 (2000)

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 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

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

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 0 580 28507 3

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 1 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 2 to 7 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

Amendments issued since publication

Amd No Date Comments

BS EN 61300-3-15:1997

Contents

Page

ii blank

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 61300-3-15 August 1997

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 à 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)

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

© BSI 04-2000

2

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:

Endorsement notice

The text of the International Standard

IEC 61300-3-15:1995 was approved by CENELEC

as a European Standard without any modification

Contents

Page

Figure 1 — Definition of dome eccentricity 3 Figure 2 — Example of set-up for eccentricity

Figure 3 — Example of displacement of ring centre for ferrule rotation 6 Figure 4 — Example of set-up for eccentricity

— 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

EN 61300-3-15:1997

1 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 1

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 1 — 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 2 — 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

Figure 1 — Definition of dome eccentricity

EN 61300-3-15:1997

1.3 Normative reference

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

2 Apparatus

2.1 Method 1 — Newton ring method

This method 1 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 2 — Interference ring method

This method 2 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)

3 Procedure

3.1 Method 1 — Newton ring method

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 3 a) and

Figure 3 b)]

3.2 Method 2 — 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 3 a) and Figure 3 b)]

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.

4 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

EN 61300-3-15:1997

Figure 2 — Example of set-up for eccentricity measurement (method 1)

EN 61300-3-15:1997

Figure 3 a) — Ideal measurement when the measuring system has no misalignment

Figure 3 b) — Actual measurement when the measuring system has any angular offset

Figure 3 — Example of displacement of ring centre for ferrule rotation

EN 61300-3-15:1997

Figure 4 — Example of set-up for eccentricity measurement (method 2)

BS EN

61300-3-15:

1997

IEC 61300-3-15:

1995

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