oSIST prEN IEC 61300-3-27:2025

SLOVENSKI STANDARD
01-maj-2025
Optični spojni elementi in pasivne komponente - Postopki osnovnega preskušanja
in merjenja - 3-27. del: Preiskave in meritve - Položaj vodilne odprtine in
odprtine/jedra vlakna pri pravokotnih tulkah
Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-27: Examinations and measurements - Guide-hole
and fibre hole/core position of rectangular ferrules
Dispositifs d'interconnexion et composants passifs à fibres optiques -Méthodes
fondamentales d'essai et de mesures - Partie 3-27: Examens et mesures - Emplacement
du trou de visée et du trou de fibre/cœur des ferrules rectangulaires
Ta slovenski standard je istoveten z: prEN IEC 61300-3-27:2025
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

86B/5005/CDV
COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 61300-3-27 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-03-21 2025-06-13
SUPERSEDES DOCUMENTS:
86B/4908/CD, 86B/4932A/CC
IEC SC 86B : FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS
SECRETARIAT: SECRETARY:
Japan Mr Ryo Koyama
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-27: Examinations and measurements - Guide-hole and fibre hole/core
position of rectangular ferrules

PROPOSED STABILITY DATE: 2033
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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IEC CDV 61300-3-27/Ed2  IEC 2025 2 86B/5005/CDV
1 CONTENTS
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms and definitions . 6
7 4 General description . 6
8 4.1 General . 6
9 4.2 Test conditions . 7
10 5 Apparatus . 8
11 5.1 General . 8
12 5.2 Microscope with Image sensor . 10
13 5.3 Image processing unit . 10
14 5.4 Display . 10
15 5.5 Light source for holes and fibre cores . 10
16 5.6 Translation System . 10
17 5.7 Computer . 10
18 6 Procedure . 10
19 6.1 General . 10
20 6.2 Hole location measurements for the rectangular ferrule . 11
21 6.2.1 Distance between two guide hole centres . 11
22 6.2.2 Fibre hole location . 12
23 6.3 Guide hole and fibre core location measurement for a rectangular connector
24 plug . 13
25 6.3.1 Distance between two guide hole centres . 13
26 6.3.2 Fibre core location . 14
27 7 Details to be specified and reported . 15
28 Annex A (informative) Measurement uncertainty caused by DUT . 17
29 A.1 General . 17
30 A.2 Angular error of the ferrule or plug in relation to the XY-plane of the
31 translation stage . 17
32 A.3 Hole angle error of the ferrule in relation to the outer shell of the ferrule or
33 plug . 18
34 Annex B (informative) . 20
35 B.1 General . 20
36 B.2 The Imaging System . 20
37 B.2.1 General . 20
38 B.2.2 Image Sensor Scale Calibration . 20
39 B.2.3 Imaging System Distortion . 22
40 B.2.4 Illumination . 22
41 B.3 Stage Errors . 22
42 B.4 Environmental Conditions . 23
43 B.4.1 General . 23
44 B.4.2 Temperature . 23
45 B.4.3 Humidity . 23
46 B.4.4 Vibration . 23
47 B.4.5 Debris . 24

IEC CDV 61300-3-27/Ed2  IEC 2025 3 86B/5005/CDV
48 Bibliography . 25
50 Figure 1 – Definitions of distance L and positional deviation P . 7
i
51 Figure 2 – Example of measurement set-up for guide holes and fibre holes position of
52 ferrule . 8
53 Figure 3 – Example of measurement set-up for guide holes and fibre cores position of
54 fibre terminated plug . 9
55 Figure 4 – Example of guide hole location measurement . 11
56 Figure 5 – Determination of designed fibre hole centre . 12
57 Figure 6 – Example of fibre hole location measurement . 13
58 Figure 7 – Determination of designed fibre core centre . 14
59 Figure 8 – Example of fibre core location measurement . 15
60 Figure A. 1 – Angular error of the ferrule or plug in relation to the XY-plane of the
61 translation stage . 17
62 Figure A. 2 – Hole angle error of ferrule against outer shell of ferrule or plug . 18
63 Figure B. 1 – Illustration of relative distance D between the location of the datum
64 targets (the guide holes, R ) and feature of interest (fibre hole or fibre core, R ) . 21
1 2
65 Figure B. 2 – Illustration of positional error between the actual centre position of a
66 fibre hole, guide hole, or fibre core and a calculated centre position having an error
67 due to presence of debris. . 24
69 Table 1- Test conditions. 7
IEC CDV 61300-3-27/Ed2  IEC 2025 4 86B/5005/CDV
73 INTERNATIONAL ELECTROTECHNICAL COMMISSION
74 ____________
76 FIBRE OPTIC INTERCONNECTING DEVICES AND
77 PASSIVE COMPONENTS –
78 BASIC TEST AND MEASUREMENT PROCEDURES –
80 Part 3-27: Examinations and measurements –Guide hole and fibre
81 hole/core position of rectangular ferrules
85 FOREWORD
86 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
87 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
88 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
89 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
90 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
91 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
92 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
93 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
94 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
95 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
96 consensus of opinion on the relevant subjects since each technical committee has representation from all
97 interested IEC National Committees.
98 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
99 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
100 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
101 misinterpretation by any end user.
102 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
103 transparently to the maximum extent possible in their national and regional publications. Any divergence between
104 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
105 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
106 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
107 services carried out by independent certification bodies.
108 6) All users should ensure that they have the latest edition of this publication.
109 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
110 members of its technical committees and IEC National Committees for any personal injury, property damage or
111 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
112 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
113 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
114 indispensable for the correct application of this publication.
115 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
116 rights. IEC shall not be held responsible for identifying any or all such patent rights.
117 International Standard IEC 61300-3-27 has been prepared by subcommittee 86B: Fibre optic
118 interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
119 This second edition cancels and replaces the first edition published in 1997. This edition
120 constitutes a technical revision.
121 This edition includes the following significant technical changes with respect to the previous
122 edition:
123 a) Change the third title of this document from “Measurement method for the hole location of
124 a multiway connector plug” to “Guide hole and fibre hole/core position of rectangular
125 ferrules”;
126 b) Addition of the measurement for fibre core locations as well as fibre hole locations;
127 c) Change the close structure wholly;

IEC CDV 61300-3-27/Ed2  IEC 2025 5 86B/5005/CDV
128 d) Addition of Annex A and Annex B.
129 The text of this standard is based on the following documents:
FDIS Report on voting
86B/XX/FDIS 86B/XX/RVD
131 Full information on the voting for the approval of this standard can be found in the report on
132 voting indicated in the above table.
133 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
134 The committee has decided that the contents of this publication will remain unchanged until the
135 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
136 the specific publication. At this date, the publication will be
137 • reconfirmed,
138 • withdrawn,
139 • replaced by a revised edition, or
140 • amended.
142 The National Committees are requested to note that for this publication the stability date
143 is 20XX.
144 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
145 AT THE PUBLICATION STAGE.
IEC CDV 61300-3-27/Ed2  IEC 2025 6 86B/5005/CDV
147 FIBRE OPTIC INTERCONNECTING DEVICES AND
148 PASSIVE COMPONENTS –
149 BASIC TEST AND MEASUREMENT PROCEDURES –
151 Part 3-27: Examinations and measurements –Guide hole and fibre
152 hole/core position of rectangular ferrules
154 1 Scope
155 This part of IEC 61300 specifies the methods of measurement for the following:
156 - the location of the two guide holes for positioning the two alignment pins, and the location
157 of multiple fibre holes for arraying fibres and;
158 - the fibre core locations within a rectangular connector plug with optical fibres installed.
159 The following dimensions on the endface of the plug are measured to satisfy the specified
160 mechanical and optical performance of the connector:
161 - the distance between the two guide hole centres, L;
162 - the positional deviation of each fibre hole or fibre core centre, Pi, from its designed
163 position
164 2 Normative references
165 There are no normative references in this document.
166 3 Terms and definitions
167 No terms and definitions are listed in this document.
168 ISO and IEC maintain terminological databases for use in standardization at the following
169 addresses:
170 • IEC Electropedia: available at http://www.electropedia.org/
171 • ISO Online browsing platform: available at http://www.iso.org/obp
172 4 General description
173 4.1 General
174 The axis of each guide hole is defined as the centre line of the best-fit cylinder applied over the
175 region of interest of each guide hole. The distance L is thus defined as the distance between
176 the points representing the intersection of each guide hole axis and the best fit plane
177 representing the ferrule end-face.There are two calculation methods, “the least-squares method”
178 and “the maximum inscribed circle method” as fibre hole’s circle approximation method. Each
179 fibre hole location should be defined as the geometrical centre position of the maximum
180 inscribed circle or best-fit circle calculated using least-squares method representing the
181 intersection of each guide hole axis and the best fit plane representing the ferrule end-face.
182 The fibre core location is defined as the geometrical centre position of the best-fit circle
183 representing the illuminated fibre core. The positional error or deviation is the distance between
184 the fibre hole or fibre core location and the theoretical position of each fibre hole or fibre core
185 relative to the coordinate datum system established by the guide holes, ferrule end face, and
186 for angle-polished ferrules, the Y-offset.

IEC CDV 61300-3-27/Ed2  IEC 2025 7 86B/5005/CDV
187 The methods and information described in this document are based on the use of a measuring
188 instrument that utilizes non-contact techniques for establishing the datum coordinate system
189 and positions of key features.
190 When measuring core position of pinned plug, the pin shall be removed.
D
i
P
C
A
W
A P
i
G
G
G
C
G
C
X X X X
X
P
i
Y
D
d
X
L
IEC
Key
L distance between the two guide hole centres
D  theoretical fibre hole or fibre core centre
i
A  measured fibre hole or fibre core centre
i
P  distance between the theoretical and the measured fibre holes or fibre core centre location
i
P   unpinned plug terminated fibres
P  plug mating centre: mid-point of L
C
G   guide hole
G  guide hole centre
C
D  designed distance
d
A  adhesive window
w
195 Figure 1 – Definitions of distance L and positional deviation P
i
196 4.2 Test conditions
197 For precise measurement such as design verification, test condition should be controlled as
198 recommended in Table 1.
199 Table 1- Test conditions
Temperature (T) Relative Humidity (RH)
Both 20 °C ± 2 °C and 23 °C 50,0 %±10,0 %
± 2 °C can be accepted.
NOTE 1 The measurement temperature is described or
reported together with the measurement results.
IEC CDV 61300-3-27/Ed2  IEC 2025 8 86B/5005/CDV
201 5 Apparatus
202 5.1 General
203 An example of the setup for measurement of fibre hole position is shown in Figure 2. An
204 example of the setup for measurement of fibre core position is shown in Figure 3. Both setups
205 are suitable for measurement of guide hole distance L.
D
I
p
M
F
e
I
T
P
f
S
L
h
C
R
IEC
Key
D Display
I Image processing unit
P
M Microscope with image sensor
I    Image
F   Ferrule
e
T   Translation stage
P   Position feedback unit
f
S   Stage-driving unit
L   Light source for the holes
h
C   Computer
R   Measurement results
210 Figure 2 – Example of measurement set-up for guide holes and fibre holes position of
211 ferrule
IEC CDV 61300-3-27/Ed2  IEC 2025 9 86B/5005/CDV
D
I
p
M
P
I
T
P
f
S
L
h
F
i
L
f
C
R
IEC
Key
D Display
I Image processing unit
P
M Microscope with image sensor
I Image
P Plug
l
T Translation stage
P Position feedback unit
f
S Stage-driving unit
L Light source for the holes
h
L Light source for the fibre core
f
F Fibre
i
C Computer
R Measurement results
215 NOTE  If it is difficult to directly input white light from L to fibre core, arranging the fibres
f
216 onto V-groove or terminating the fibre end is recommended.
217 Figure 3 – Example of measurement set-up for guide holes and fibre cores position of
218 fibre terminated plug
220 There are typically three primary sources of measurement uncertainty: uncertainty due to
221 inherent variability in the measurement apparatus, the interaction between the DUT (Device
222 under test) and measurement apparatus, and uncertainty due to un-correctable changes in part
223 size and / or geometry due to fluctuations in environmental conditions (e.g. temperature and
224 humidity).
IEC CDV 61300-3-27/Ed2  IEC 2025 10 86B/5005/CDV
225 The measurement uncertainties are shown in Annex A and B.
226 5.2 Microscope with Image sensor
227 The microscope with image sensor shall send the endface image of the connector ferrule or
228 plug to the image processing unit.
229 5.3 Image processing unit
230 The image processing unit shall have the necessary capabilities to identify, with minimal
231 contribution to measurement uncertainty, points along the edge of the guide holes, fibre holes,
232 and around the circumference of an illuminated fibre core.
233 5.4 Display
234 The display shall show the endface image of the connector ferrule or the connector plug and
235 the measurement results.
236 5.5 Light source for holes and fibre cores
237 The light source for holes shall illuminate the fibre holes and the guide holes of the connector
238 ferrule for measuring the fibre hole locations, or the guide holes of the connector plug. A low
239 coherent light source is recommended as avoiding the interference of light source. A better
240 example is a broadband white light source (with a spectral width of approximately 100 nm or
241 wider).
242 The light source for fibre cores shall illuminate the fibre cores of the connector plug for
243 measuring the fibre core location. A low coherent light source is recommended as avoiding the
244 interference of light source. A better example is a broadband white light source (with a spectral
245 width of approximately 100 nm or wider).
246 5.6 Translation System
247 Translation system consists of translation stage, stage-driving unit and position feedback unit.
248 The ferrule or connector plug is attached to a translation stage with sufficient rigidity to avoid
249 errors in the measurement associated with unintentional movement of the ferrule or connector
250 plug relative to its original position during or after translation. The translation system should
251 also include stage-drive unit and position feedback unit that have sufficient metrological
252 performance to meet the respective measurement uncertainty requirements.
253 5.7 Computer
254 The computer should have the necessary computational capabilities to generate values for
255 guide-hold distance L, fibre hole position, and fibre core position – including any required
256 corrections associated with stage error mapping or environmental effects – using inputs from
257 the Image Processing Unit and Translation System.
259 6 Procedure
260 6.1  General
261 In the following methods detailed in 6.2, calculations on fibre hole location are carried out
262 sequentially for each guide hole and fibre hole location measurement. In the following methods
263 detailed in 6.3, calculations on fibre core location are carried out sequentially for each guide
264 hole and fibre core location
...