EN 61300-3-37:2005
(Main)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-37: Examinations and measurements - Endface angle of angle-polished optical fibres
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-37: Examinations and measurements - Endface angle of angle-polished optical fibres
Describes methods to measure the endface angle of flat or convex angle-polished optical fibres. The primary attributes addressed include endface angle, key angle and radius of curvature.
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und Messverfahren - Teil 3-37: Untersuchungen und Messungen - Endflächenwinkel schräg polierter optischer Fasern
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures - Partie 3-37: Examens et mesures - Angle d'extrémité des fibres optiques à polissage d'angle
Décrit les méthodes de mesure de l'angle de l'extrémité des fibres optiques à polissage d'angle plat ou convexe. Les attributs essentiels concernent l'angle d'extrémité, l'angle clé et le rayon de courbure.
Naprave za medsebojno povezovanje optičnih kablov in pasivne komponente – Osnovni preskusni in merilni postopki – 3-37. del: Pregledi in meritve – Kot poliranja konca kotno poliranih optičnih vlaken (IEC 61300-3-37:2005)
General Information
- Status
- Published
- Publication Date
- 14-Jul-2005
- Withdrawal Date
- 31-May-2008
- Drafting Committee
- IEC/SC 86B - IEC_SC_86B
- Parallel Committee
- IEC/SC 86B - IEC_SC_86B
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 15-Jul-2005
- Completion Date
- 15-Jul-2005
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
Overview
EN 61300-3-37:2005 (adopted from IEC 61300-3-37:2005) defines standard methods to measure the endface angle of angle‑polished optical fibres. It covers both flat and convex (radiused) angle‑polished fibre endfaces and specifies the primary attributes to be measured: endface angle, key angle, and radius of curvature. The standard describes two interferometric measurement methods - an automatic (reference) interferometric method and a manual interferometric method - and the general apparatus and procedures required for reliable measurement.
Key topics and requirements
- Scope: Measurement methods for endface angle on angle‑polished optical fibres (flat and convex).
- Primary attributes:
- Endface angle (θ): angle between plane perpendicular to fibre axis and the polished surface (flat) or tangent at the core (convex).
- Key angle: orientation parameter relevant for keyed connectors.
- Radius of curvature: for radiused (convex) polished endfaces.
- Measurement methods:
- Method 1 - Automatic interferometric method: the reference method. Uses a tiltable micropositioner, interferometric microscope, image analyser and PC‑based fringe interpretation for higher accuracy and repeatability.
- Method 2 - Manual interferometric method: a validated manual alternative where measurements are performed visually with interferometric fringe patterns and micrometer tilting.
- Apparatus overview: interferometric microscope, angular micropositioner/tilt stage, fibre/plug holders, XYZ positioner, monitor/image analyser for fringe interpretation.
- Test procedure essentials: alignment, fringe analysis, tilt to nominal angle, and extraction of angle, key angle and radius from interferograms.
Applications and who uses it
EN 61300-3-37 is used by:
- Connector and component manufacturers for design validation and quality control of angle‑polished fibres and ferrule‑less connectors.
- Test laboratories and QA teams performing acceptance testing, incoming inspection and production verification.
- R&D and optical assembly engineers involved in connectorization, transmitter/receiver interface optimization, and physical‑contact polishing processes.
- Standards and compliance officers ensuring measurement traceability and interoperability of fibre optic components.
Practical benefits include consistent measurement practice, improved mating performance (return loss and back‑reflection control), and reproducible quality metrics for polished fibre endfaces.
Related standards
- IEC 61300-3-17 / EN 61300-3-17 - Endface angle of angle‑polished ferrules
- IEC 61754-19 / EN 61754-19 - Fibre optic connector interfaces (Type SG family)
- ISO 2538 / EN ISO 2538 - Geometrical product specifications: series of angles and slopes on prisms
Keywords: EN 61300-3-37:2005, endface angle, angle‑polished optical fibres, interferometric method, fibre optics testing, key angle, radius of curvature, connector quality control.
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Frequently Asked Questions
EN 61300-3-37:2005 is a standard published by CLC. Its full title is "Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-37: Examinations and measurements - Endface angle of angle-polished optical fibres". This standard covers: Describes methods to measure the endface angle of flat or convex angle-polished optical fibres. The primary attributes addressed include endface angle, key angle and radius of curvature.
Describes methods to measure the endface angle of flat or convex angle-polished optical fibres. The primary attributes addressed include endface angle, key angle and radius of curvature.
EN 61300-3-37:2005 is classified under the following ICS (International Classification for Standards) categories: 33.180.20 - Fibre optic interconnecting devices. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 61300-3-37:2005 has the following relationships with other standards: It is inter standard links to EN ISO 2538:2003, EN 61754-19:2002, EN 61300-3-17:1999, EN 61300-1:2011, EN 50377-3-1:2008, EN 61300-1:2016, EN IEC 61300-1:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 61300-3-37:2005 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI SIST EN 61300-3-37:2006
STANDARD
marec 2006
Naprave za medsebojno povezovanje optičnih kablov in pasivne komponente
– Osnovni preskusni in merilni postopki – 3-37. del: Pregledi in meritve – Kot
poliranja konca kotno poliranih optičnih vlaken (IEC 61300-3-37:2005)
Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-37: Examinations and measurements - Endface
angle of angle-polished optical fibres (IEC 61300-3-37:2005)
ICS 33.180.20 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 61300-3-37
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2005
ICS 33.180.20
English version
Fibre optic interconnecting devices and passive components –
Basic test and measurement procedures
Part 3-37: Examinations and measurements –
Endface angle of angle-polished optical fibres
(IEC 61300-3-37:2005)
Dispositifs d'interconnexion et Lichtwellenleiter - Verbindungselemente
composants passifs à fibres optiques - und passive Bauteile –
Méthodes fondamentales d'essais Grundlegende Prüf- und Messverfahren
et de mesures Teil 3-37: Untersuchungen und
Partie 3-37: Examens et mesures – Messungen –
Angle d'extrémité des fibres optiques Endflächenwinkel schräg polierter
à polissage d'angle optischer Fasern
(CEI 61300-3-37:2005) (IEC 61300-3-37:2005)
This European Standard was approved by CENELEC on 2005-06-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61300-3-37:2005 E
Foreword
The text of document 86B/2106/FDIS, future edition 1 of IEC 61300-3-37, prepared by SC 86B, Fibre
optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to
the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-3-37 on 2005-06-01.
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) 2006-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61300-3-37:2005 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61300-1 NOTE Harmonized as EN 61300-1:2003 (not modified).
__________
- 3 - EN 61300-3-37:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The 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
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 61300-3-17 - Fibre optic interconnecting devices and EN 61300-3-17 1999
passive components - Basic test and
measurement procedures
Part 3-17: Examinations and
measurements - Endface angle of angle-
polished ferrules
1) 2)
IEC 61754-19 - Fibre optic connector interfaces EN 61754-19 2002
Part 19: Type SG connector family
1) 2)
ISO 2538 - Geometrical Product Specifications (GPS) EN ISO 2538 2003
- Series of angles and slopes on prisms
1)
Undated reference.
2)
Valid edition at date of issue.
NORME CEI
INTERNATIONALE
IEC
61300-3-37
INTERNATIONAL
Première édition
STANDARD
First edition
2005-06
Dispositifs d'interconnexion et composants
passifs à fibres optiques –
Méthodes fondamentales d'essais
et de mesures –
Partie 3-37:
Examens et mesures –
Angle d'extrémité des fibres optiques
à polissage d'angle
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-37:
Examinations and measurements –
Endface angle of angle-polished optical fibres
IEC 2005 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
61300-3-37 IEC:2005 – 3 –
CONTENTS
FOREWORD.5
1 Scope.9
2 Normative references .9
3 General description .9
3.1 Method 1 – Automatic interferometric method.11
3.2 Method 2 – Manual interferometric method.15
4 Apparatus.17
4.1 Method 1 – Automatic interferometric method.17
4.1.1 Microscope.17
4.1.2 Angular micropositioner .17
4.1.3 Fibre holder.17
4.1.4 Plug holder .19
4.1.5 Image analyser.19
4.2 Method 2 – Manual interferometric method.19
4.2.1 Microscope.19
4.2.2 Angular micropositioner .19
4.2.3 Fibre holder.21
4.2.4 Plug holder .21
4.2.5 Monitor for visual display.21
5 Procedure .21
5.1 Method 1 – Automatic interferometric method.21
5.1.1 Convex polished optical fibres .21
5.1.2 Flat polished optical fibres.23
5.2 Method 2 – Manual interferometric method.23
5.2.1 Convex polished optical fibres .23
5.2.2 Flat polished optical fibres.25
6 Details to be specified .25
6.1 Method 1 – Automatic interferometric method.25
6.2 Method 2 – Manual interferometric method.25
Bibliography.26
Figure 1 – Definition of optical fibre endface angle for polished convex (a) and flat (b)
endfaces.11
Figure 2 – Example of the set-up for angle measurement by means of an automated
interferometer .13
Figure 3 – Example of the interferometric pattern of a convex polished optical fibre.13
Figure 4 – Example of the interference pattern of a flat angled polished optical fibre .15
Figure 5 – Example of the interference pattern of a convex polished optical fibre
adjusted for measurement using method 2.17
Figure 6 – Example of apparatus for the angle measurement by method 2.19
61300-3-37 IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-37: Examinations and measurements –
Endface angle of angle-polished optical fibres
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61300-3-37 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2106/FDIS 86B/2132/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
61300-3-37 IEC:2005 – 7 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61300 consists of the following parts, under the general title Fibre optic interconnecting
devices and passive components −
...




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