SIST EN IEC 61300-3-35:2023
(Main)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-35: Examinations and measurements - Visual inspection of fibre optic connectors and fibre-stub transceivers (IEC 61300-3-35:2022)
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-35: Examinations and measurements - Visual inspection of fibre optic connectors and fibre-stub transceivers (IEC 61300-3-35:2022)
This part of IEC 61300 is concerned with the observation and classification of debris, scratches
and defects. The inspection requirements are based on IEC TR 62627-05. Advice for cleaning
of contamination from fibres/ferrule is found in IEC TR 62627-01 and a recommendation is given
in Annex D. IEC TR 62572-4 provides the cleaning method for a stub for optical transceivers.
Visual inspection is in addition to, and does not replace measurement of performance
parameters such as attenuation and return loss, or end face parameters. The dimensions
specified are chosen such that they can be easily estimated. Not only the zones A and B on the
fibre are inspected for defects and scratches but the whole contact area (where the two
fibres/ferrules meet when mated) needs to be inspected for contamination (this is up to 250 µm
diameter for cylindrical ferrules and the whole ferrule surface for rectangular ferrules).
The objectives of this document are the following:
• specify the minimum criteria for a microscope to be compliant to this document;
• specify the procedure and criteria for inspecting fibre-optic end faces for cleanliness to
determine if the end faces are fit for use. All connector optical interfaces (IEC 61755 series
and IEC 63267 series) are based on physical contact between fibre cores;
• provide quantitative criteria for the analysis of end face images
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und Messverfahren - Teil 3-35: Untersuchungen und Messungen - Visuelle Inspektion von Lichtwellenleiter-Steckverbindern und Faser Stub-Transceivern (IEC 61300-3-35:2022)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Procédures fondamentales d'essais et de mesures - Partie 3-35: Examens et mesures - Examen visuel des connecteurs à fibres optiques et des émetteurs-récepteurs à embase fibrée (IEC 61300-3-35:2022)
L'IEC 61300-3-35:2022 porte sur l’observation et la classification des débris, des éraflures et des défauts. Les exigences d’examen sont fondées sur l’IEC/TR 62627-05. L’IEC/TR 62627-01 fournit des conseils pour le nettoyage de la contamination des fibres/férules et l’Annexe D donne une recommandation. L’IEC/TR 62572-4 fournit la méthode de nettoyage d’une embase pour émetteurs-récepteurs optiques. L’examen visuel s’ajoute à la mesure des paramètres de performance tels que l’affaiblissement et d’affaiblissement de réflexion, ou les paramètres aux extrémités, et ne les remplace pas. Les dimensions spécifiées ont été choisies de manière à faciliter leur estimation. Non seulement les zones A et B de la fibre sont examinées afin de déterminer l’éventuelle présence de défauts et d’éraflures, mais il est également nécessaire d’examiner la totalité de la surface de contact (l’endroit où les deux fibres/férules se rencontrent une fois accouplées) afin de détecter une éventuelle contamination (c’est-à-dire jusqu’à un diamètre de 250 µm pour les férules cylindriques et la totalité de la surface des férules rectangulaires). Le présent document a pour objectifs de:
- spécifier les critères minimaux pour qu’un microscope soit conforme au présent document;
- spécifier la procédure et les critères d’examen de la propreté des extrémités des fibres optiques afin de déterminer si ces extrémités sont aptes à l’emploi. Toutes les interfaces optiques des connecteurs (séries IEC 61755 et IEC 63267) reposent sur un contact physique entre les cœurs des fibres;
- fournir des critères quantitatifs pour l’analyse des images des extrémités.
Cette troisième édition annule et remplace la deuxième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- ajout d’une mention stipulant qu’un examen visuel ne remplace pas une qualification optique telle qu’une mesure d’affaiblissement et d’affaiblissement de réflexion;
- ajout de plusieurs termes et définitions;
- ajout d’exigences concernant les connecteurs SM 35 dB;
- ajout d’une phrase à l’Article 5 concernant la susceptibilité des méthodes à la variabilité du système et à la variabilité au sein des systèmes provenant d’un même fournisseur;
- suppression des exigences d’examen pour les zones C et D;
- insertion d’une spécification générique concernant la propreté de la totalité d’une férule rectangulaire et d’une zone de 250 µm autour de chaque fibre;
- ajout d’une recommandation de nettoyage des férules rectangulaires et cylindriques;
- changement du bord extérieur de la zone d’examen B de 115 µm à 110 µm pour satisfaire aux tolérances de fabrication des microscopes;
- modification concernant les défauts en partie situés dans le cœur à considérer uniquement comme étant dans cette partie. Le reste du défaut est considéré comme étant situé dans la gaine;
- ajout d’une mention stipulant qu’un connecteur ne peut pas être rejeté après un simple examen visuel. Si la performance optique spécifiée de ce connecteur est satisfaite, il convient d’utiliser ce dernier.
Optični spojni elementi in pasivne komponente - Osnovni preskusni in merilni postopki - 3-35. del: Preiskave in meritve - Vizualno pregledovanje optičnih konektorjev in sprejemnikov-oddajnikov z vlakenskimi tulkami (IEC 61300-3-35:2022)
Ta del standarda IEC 61300 obravnava opazovanje in razvrščanje umazanije, prask in napak. Zahteve glede pregledov temeljijo na standardu IEC TR 62627-05. V standardu IEC TR 62627-01 je podan nasvet za čiščenje onesnaženih vlaken/tulk, v dodatku D pa je podano priporočilo. Standard IEC TR 62572-4 podaja metodo čiščenja tulk za optične sprejemnike-oddajnike. Vizualni pregled je dodatek in ne nadomešča merjenja parametrov zmogljivosti, kot sta slabljenje in povratna izguba, ali parametrov končne površine. Navedene mere so izbrane tako, da jih je mogoče enostavno oceniti. Poleg pregledovanja morebitnih napak in prask v območjih A in B na vlaknu je treba pregledati tudi celotno kontaktno območje (kjer se dve vlakni/tulki pri spajanju stikata) ter se tako prepričati, da ni onesnaženo (tj. do premera 250 µm pri cilindričnih tulkah in celotno površino tulke pri pravokotnih tulkah).
Cilji tega dokumenta so:
• določitev minimalnih meril za skladnost mikroskopa s tem dokumentom;
• določitev postopka in meril za pregledovanje čistosti končnih površin optičnih vlaken, da se ugotovi njihova primernost za uporabo. Vsi vmesniki optičnih konektorjev (skupini standardov IEC 61755 in IEC 63267) temeljijo na fizičnem stiku med vlakenskimi jedri;
• zagotovitev kvantitativnih meril za analizo slik končnih površin.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 61300-3-35:2023
01-januar-2023
Nadomešča:
SIST EN 61300-3-35:2016
Optični spojni elementi in pasivne komponente - Osnovni preskusni in merilni
postopki - 3-35. del: Preiskave in meritve - Vizualno pregledovanje optičnih
konektorjev in sprejemnikov-oddajnikov z vlakenskimi tulkami (IEC 61300-3-
35:2022)
Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-35: Examinations and measurements - Visual
inspection of fibre optic connectors and fibre-stub transceivers (IEC 61300-3-35:2022)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und
Messverfahren - Teil 3-35: Untersuchungen und Messungen - Visuelle Inspektion von
Lichtwellenleiter-Steckverbindern und Faser Stub-Transceivern (IEC 61300-3-35:2022)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Procédures
fondamentales d'essais et de mesures - Partie 3-35: Examens et mesures - Examen
visuel des connecteurs à fibres optiques et des émetteurs-récepteurs à embase fibrée
(IEC 61300-3-35:2022)
Ta slovenski standard je istoveten z: EN IEC 61300-3-35:2022
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
SIST EN IEC 61300-3-35:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 61300-3-35:2023
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SIST EN IEC 61300-3-35:2023
EUROPEAN STANDARD EN IEC 61300-3-35
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2022
ICS 33.180.20 Supersedes EN 61300-3-35:2015
English Version
Fibre optic interconnecting devices and passive components -
Basic test and measurement procedures - Part 3-35:
Examinations and measurements - Visual inspection of fibre
optic connectors and fibre-stub transceivers
(IEC 61300-3-35:2022)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Procédures fondamentales d'essais et de Bauteile - Grundlegende Prüf- und Messverfahren - Teil 3-
mesures - Partie 3-35: Examens et mesures - Examen 35: Untersuchungen und Messungen - Visuelle Inspektion
visuel des connecteurs fibroniques et des émetteurs- von Lichtwellenleiter-Steckverbindern und Faser Stub-
récepteurs à embase fibrée Transceivern
(IEC 61300-3-35:2022) (IEC 61300-3-35:2022)
This European Standard was approved by CENELEC on 2022-10-21. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61300-3-35:2022 E
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SIST EN IEC 61300-3-35:2023
EN IEC 61300-3-35:2022 (E)
European foreword
The text of document 86B/4643/FDIS, future edition 3 of IEC 61300-3-35, 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 approved by CENELEC as EN IEC 61300-3-35:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-07-21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-10-21
document have to be withdrawn
This document supersedes EN 61300-3-35:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61300-3-35:2022 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61300-1 NOTE Harmonized as EN IEC 61300-1
IEC 61755-2 (series) NOTE Harmonized as EN 61755-2 (series)
1
IEC 63267-2 (series) NOTE Harmonized as EN IEC 63267-2 (series)
1
Under preparation. Stage at the time of publication: prEN IEC 63267-2 (series):2022.
2
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SIST EN IEC 61300-3-35:2023
EN IEC 61300-3-35:2022 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60825-2 - Safety of laser products - Part 2: Safety EN 60825-2 -
of optical fibre communication systems
(OFCSs)
3
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SIST EN IEC 61300-3-35:2023
IEC 61300-3-35
®
Edition 3.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-35: Examinations and measurements – Visual inspection of fibre optic
connectors and fibre-stub transceivers
Dispositifs d’interconnexion et composants passifs fibroniques – Procédures
fondamentales d’essais et de mesures –
Partie 3-35: Examens et mesures – Examen visuel des connecteurs fibroniques
et des émetteurs-récepteurs à embase fibrée
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-5713-5
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 61300-3-35:2023
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CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Apparatus . 7
4.1 General . 7
4.2 Method A: Direct view optical microscopy . 8
4.3 Method B: Video microscopy . 8
4.4 Method C: Automated analysis microscopy . 9
4.5 Requirements of validation . 9
4.6 Minimum requirements for standard field of view microscope . 9
4.7 Minimum requirements for large field of view microscope . 9
5 Inspection procedure . 9
Annex A (normative) Visual requirements for connector end faces . 12
A.1 Requirements . 12
A.2 Visual inspection requirements for multimode PC and APC polished
connectors . 12
A.3 Visual requirements for single-mode PC polished connectors, RL ≥ 26 dB,
and single-mode transceivers using a fibre-stub interface . 13
A.4 Visual requirements for single-mode PC polished connectors, RL ≥ 35 dB . 13
A.5 Visual requirements for single-mode PC polished connectors, RL ≥ 45 dB . 14
A.6 Visual requirements for single-mode angle polished (APC) connectors . 14
Annex B (informative) Examples of defects and scratches . 15
Annex C (normative) Validation procedure . 16
C.1 Validation artefact . 16
C.2 Validation procedure . 16
Annex D (informative) Recommended cleaning method. 17
D.1 Inspection procedure for cleanliness . 17
D.2 Cleaning procedure rectangular ferrules (on cable) . 17
D.3 Cleaning procedure for cylindrical ferrules . 19
D.4 Cleaning procedure for adaptor and receptacle of rectangular ferrules . 20
Annex E (informative) Examples of large field of view images . 21
Bibliography . 23
Figure 1 – Flowchart of inspection procedure . 10
Figure B.1 – Example 1 of defects and scratches . 15
Figure B.2 – Example 2 of defects and scratches . 15
Figure D.1 – Flowchart of dry only cleaning/inspection sequence . 17
Figure D.2 – Flowchart of dry-wet cleaning/inspection sequence . 17
Figure D.3 – Dry cleaning of connector on cable . 18
Figure D.4 – Moisten the tape . 19
Figure D.5 – Wiping action . 19
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Figure D.6 – cleaning of cylindrical ferrule . 19
Figure D.7 – Moisten the tape . 20
Figure D.8 – 2 Strokes on wet tape . 20
Figure D.9 – Insert click cleaner. 20
Figure D.10 – Clean pins . 20
Figure D.11 – Rotate stick . 20
Figure E.1 – Example of typical contaminations . 21
Figure E.2 – Example of typical contaminations . 21
Figure E.3 – Example of typical contaminations . 22
Figure E.4 – Example of typical contaminations . 22
Table A.1 – Visual requirements for multimode PC and APC polished connectors . 12
Table A.2 – Visual requirements for single-mode PC polished connectors, RL ≥ 26 dB,
and single-mode transceivers using a fibre-stub interface . 13
Table A.3 – Visual requirements for single-mode PC polished connectors, RL ≥ 35 dB . 13
Table A.4 – Visual requirements for single-mode PC polished connectors, RL ≥ 45 dB . 14
Table A.5 – Visual requirements for single-mode angle polished (APC) connectors . 14
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SIST EN IEC 61300-3-35:2023
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-35: Examinations and measurements – Visual inspection
of fibre optic connectors and fibre-stub transceivers
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 this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by 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
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61300-3-35 has been prepared by subcommittee SC 86B: Fibre optic interconnecting
devices and passive components, of IEC technical committee 86: Fibre optics. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2015. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) adding of a statement that visual inspection is not a substitute for optical qualification such
as attenuation and return loss measurement;
b) adding of some terms and definitions;
c) adding requirements for SM 35 dB connectors;
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SIST EN IEC 61300-3-35:2023
IEC 61300-3-35:2022 © IEC 2022 – 5 –
d) adding of a sentence in Clause 5 concerning the susceptibility of the methods to system
variability and variability within systems from same supplier;
e) removal of inspection requirements for zones C and D;
f) insertion of a generic cleanliness specification for whole rectangular ferrule and 250 µm
area around every fibre;
g) adding a cleaning recommendation for rectangular and cylindrical ferrules;
h) outer edge of inspection zone B has changed from 115 µm to 110 µm to meet manufacturing
tolerances of fixture for microscopes;
i) change that defects that are partly in core are only to be judged for the part they are in the
core. The remainder of the defect is considered to be located in the cladding.
j) adding a statement that a connector cannot be rejected by just failing visual inspection.
Meeting the specified optical performance determines the use of this connector.
The text of this International Standard is based on the following documents:
Draft Report on voting
86B/4643/FDIS 86B/4665/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 61300 series, published under the general title Fibre optic
interconnecting devices and passive components – Basic test and measurement procedures,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
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FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-35: Examinations and measurements – Visual inspection
of fibre optic connectors and fibre-stub transceivers
1 Scope
This part of IEC 61300 is concerned with the observation and classification of debris, scratches
and defects. The inspection requirements are based on IEC TR 62627-05. Advice for cleaning
of contamination from fibres/ferrule is found in IEC TR 62627-01 and a recommendation is given
in Annex D. IEC TR 62572-4 provides the cleaning method for a stub for optical transceivers.
Visual inspection is in addition to, and does not replace measurement of performance
parameters such as attenuation and return loss, or end face parameters. The dimensions
specified are chosen such that they can be easily estimated. Not only the zones A and B on the
fibre are inspected for defects and scratches but the whole contact area (where the two
fibres/ferrules meet when mated) needs to be inspected for contamination (this is up to 250 µm
diameter for cylindrical ferrules and the whole ferrule surface for rectangular ferrules).
The objectives of this document are the following:
• specify the minimum criteria for a microscope to be compliant to this document;
• specify the procedure and criteria for inspecting fibre-optic end faces for cleanliness to
determine if the end faces are fit for use. All connector optical interfaces (IEC 61755 series
and IEC 63267 series) are based on physical contact between fibre cores;
• provide quantitative criteria for the analysis of end face images.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
IEC 60825-2, Safety of laser products – Part 2 Safety of optical fibre communication systems
(OFCSs)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
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3.1.1
defect
permanent non-linear surface feature on the fibre or ferrule end face within the regions of
interest, which includes, but it not limited to, pits, chips, edge chipping, and/or non removable
foreign material
Note 1 to entry: Some fibre types have structural features potentially visible on the fibre end face. Fibres that use
microstructures to contain the light signal, such as photonic band-gap and hole-assisted fibres, can have an
engineered or random pattern of structures surrounding the core. These features are not defects.
Note 2 to entry: Scratches are excluded from this definition.
3.1.2
defect size
diameter of the smallest circle that can encompass the entire defect
3.1.3
debris
unwanted material or particulates of any kind on the surface of fibre or ferrule end face within
the regions of interest that is removeable using standard cleaning methods
Note 1 to entry: Multiple cleaning methods are described in IEC TR 62627-01.
3.1.4
scratch
permanent surface feature on the fibre end face where the width of the damaged area is smaller
than or equal to one fifth of its length
3.1.5
reliably detectable
sufficiently clear and visible so that a typical technician of average training would recognize a
feature at least 98 % of the time
3.2 Abbreviated terms
APC angled physical contact
DUT device under test
FOV field of view
LFOV large field of view
MM multimode
PC physical contact
RL return loss
SFOV standard field of view
SM single-mode
4 Apparatus
4.1 General
One of the objectives of this document is to specify the minimum criteria (see 4.5 and 4.6) a
microscope shall meet to be compliant to this document.
Three types of microscopes are described:
a) method A microscope: direct view optical microscope as described in 4.2;
b) method B microscope: video microscope as described in 4.3;
c) method C microscope: automated analysis microscope as described in 4.4.
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For each type, there are optical/hardware requirements to be met and procedures to be
followed. As these processes are in support of the inspection criteria defined in Clause 5, all
three are expected to result in a "pass" or "fail".
The minimum optical requirements for all types of microscopes to be compliant with this
document are given in 4.5 and 4.6.
The microscopes described in this document, with the exception of large field of view (LFOV),
are capable of being used for inspection for contamination (cleanliness) prior mating in the field
and factory and after polishing SM and MM, single-fibre and multifibre connectors in the factory.
LFOV microscopes can be used for inspection of contamination of the entire ferrule surface of
multifibre connectors in the field and in the factory.
For methods A and B, visual gauge tools should be used to facilitate the estimation procedure.
For method A, an eyepiece reticule should be used. For method B, a transparent overlay should
be used.
WARNING – All methods are susceptible to system variability: methods A and B are operator
and equipment hardware dependent. Method C is less operator dependent but exhibits from
software irregularities and variations in hardware and, in case of field use, operator handling
differences can cause a variation in results that might appear even when equipment from the
same brand is compared. Method C has an inherent uncertainty when defects or scratches are
located near test limits, as described in Annex A tables.
4.2 Method A: Direct view optical microscopy
This method uses an optical microscope in which a primary objective lens forms a first image
that is then magnified by an eyepiece that projects the image directly to the user’s eye. It shall
have the following features and capabilities:
• a suitable ferrule or connector adapter;
• a light source and focussing mechanism;
• a built-in laser safety filter;
• a means to compare dimension of defects or scratches observed in the image with a
sufficient reliability (i.e. eyepiece reticule with certified dimension according the
magnification).
Laser safety is of particular concern when using direct view microscopes, as any energy in the
optical path is directed into the eye of the observer. When method A is used, the user shall
ensure there is no laser active on the link prior to inspection. IEC 60825-2 shall be used for
laser safety of optical fibre communication systems.
4.3 Method B: Video microscopy
This method uses an optical microscope in which a lens system forms an image on a sensor
that, in turn, transfers the image to a display. The user views the image on the display. It shall
have the following features and capabilities:
• a suitable ferrule or connector adapter;
• a light source and focussing mechanism;
• a means for creating an image (display);
• a means to estimate surface dimensions defects and/or scratches observed in the image
(e.g. overlay with certified dimension according the image on the screen).
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4.4 Method C: Automated analysis microscopy
This method use
...
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