1、 TIA-455-195-A-2003 APPROVED: NOVEMBER 26, 2003 REAFFIRMED: FEBRUARY 6, 2013 TIA-455-195-A (Revision of TIA-455-195) November 2003FOTP- 195 IEC-60793-1-21 Optical Fibres- Part 1-21: Measurement Methods and Test Procedures- Coating Geometry NOTICE TIA Engineering Standards and Publications are design
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19、AMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. FOREWARD With the adoption of international standard IEC 60793-1-21 (Optical Fibres Part 1-21: Measurement Methods and Test Procedures Coating Geometry) TIA-4
20、55-195-A supercedes the current TIA/EIA-455-195 (FOTP-195 Coating Geometry Measurement for Optical Fiber). This action was taken under the cognizance of the TIA-FO-4.6 Subcommittee on Optical Fibers. IEC 60793-1-21 adopted as TIA-455-195-A iCONTENTS FOREWORD ii INTRODUCTION .iv 1 Scope 1 2 Normative
21、 references .1 3 Overview of method1 4 Definitions3 5 Reference test method .3 6 Apparatus 3 7 Sampling and specimens3 7.1 Specimen length3 7.2 Specimen end face3 8 Procedure 3 9 Calculations .3 10 Results.4 11 Specification information 4 Annex A (normative) Requirements specific to method A Side-vi
22、ew light distribution .5 Annex B (normative) Requirements specific to method B Mechanical measurement .9 Bibliography .11 Figure A1 Schematic diagram of typical test equipment 5 Figure A.2 Side view of measurement set-up6 Figure B1 Top view of a typical electronic micrometer system 9 Table 1 Measure
23、ment methods 1 IEC 60793-1-21 adopted as TIA-455-195-A iiINTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-21: Measurement methods and test procedures Coating geometry FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comp
24、rising all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes Internatio
25、nal Standards. 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.
26、The 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 the IEC on technical matters express, as nearly as possible, an international conse
27、nsus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports
28、 or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence be
29、tween the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Atten
30、tion is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-21 has been prepared by subcommittee 86A: Fibres and
31、cables, of IEC technical committee 86: Fibre optics. This standard, together with the other standards in the IEC 60793-1-2X series, cancels and replaces the first edition of IEC 60793-1-2, of which it constitutes a technical revision. The text of this standard is based on the following documents: FD
32、IS Report on voting 86A/686/FDIS 86A/725/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Annexes A and B form an integral part
33、of this standard.IEC 60793-1-21 adopted as TIA-455-195-A iiiIEC 60793-1-2X consists of the following parts, under the general title: Optical fibres: Part 1-20: Measurement methods and test procedures Fibre geometry Part 1-21: Measurement methods and test procedures Coating geometry Part 1-22: Measur
34、ement methods and test procedures Length measurement The committee has decided that the contents of this publication will remain unchanged until 2003. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. IEC 60793-1-21 adopted as TIA-455-195-A ivIN
35、TRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test procedures as they apply to optical fibres. Within the same series several different areas are grouped, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29: Measurement methods and test procedures for dimen
36、sions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical charac-teristics parts 1-40 to 1-49: Measurement methods and test procedures for transmission and optical characteristics parts 1-50 to 1-59: Measurement methods and test procedures for environmental characteristics. IE
37、C 60793-1-21 adopted as TIA-455-195-A 1OPTICAL FIBRES Part 1-21: Measurement methods and test procedures Coating geometry 1 Scope This part of IEC 60793 establishes uniform requirements for measuring the coating geometry of optical fibre. Coating geometry measurements are fundamental values that nee
38、d to be known for subsequent procedures such as cabling, connectorization, splicing, handling and for making other measurements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For
39、 undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre geometry 3 Overview of method This standard gives four methods for measuring fibre geometry characteristics w
40、hich are given in terms of the following parameters: coating diameter; coating non-circularity; coating-cladding concentricity error. Table 1 Measurement methods Method Characteristics covered Fibre category(ies) covered Former designation A Side-view aAll All bIEC 60793-1-A3 B Mechanical Coating di
41、ameter and non-circularity All IEC 60793-1-A4 aFor certain coating parameters evaluation, the cladding diameter should be measured using this procedure. However, due to the relatively poor accuracy of the method, this value of cladding diameter cannot be considered as an alternative to the values ob
42、tained by the already established test methods for glass geometry, for which reference should be made to IEC 60793-1-20. BCoating-cladding concentricity error is not defined for category A4 fibre. Both methods are conducted off-line during inspection. Neither of them is suitable for on-line, in-proc
43、ess measurements. Information common to both measurements appears in clauses 2 to 10. See also annexes A and B, for methods A and B, respectively. IEC 60793-1-21 adopted as TIA-455-195-A 2IEC 60793-1-21 adopted as TIA-455-195-A 34 Definitions For the purpose of this part of IEC 60793, the following
44、definitions apply. 4.1 primary coating one or more layers of protective coating material applied to the fibre cladding surface during or after the drawing to preserve the cladding surface and to give a minimum amount of required protection (e.g. a 250 m protective coating) 4.2 secondary or “buffer“
45、coating one or more layers of coating material applied over one or more layers of primary coated fibres in order to give additional required protection or to arrange fibres together in a particular structure (e.g. a 900 m “buffer“ coating, “tight jacket“ or “ribbon coating“) 5 Reference test method
46、Method A is the reference test method (RTM), which is the one used to settle disputes. 6 Apparatus Annexes A and B include layout drawings and other equipment requirements for each of the methods A and B, respectively. 7 Sampling and specimens 7.1 Specimen length The specimen shall be a short length
47、 of fibre, or as specified in the detail specification. 7.2 Specimen end face Because the end faces of the specimen are not involved in the measurement itself, it is not necessary to have tight end-face requirements. 8 Procedure See annexes A and B for methods A and B, respectively. 9 Calculations S
48、ee annexes A and B for methods A and B, respectively. IEC 60793-1-21 adopted as TIA-455-195-A 410 Results The following information shall be provided with each measurement: date and title of measurement; identification and description of specimen; measurement results as required by the detail specif
49、ication. The following information shall be available upon request: length of specimen; measurement method used: A or B; description of measurement apparatus arrangement; details of computation technique; date and details of the latest calibration. 11 Specification information The detail specification shall specify the following information: type of fibre to be measured; failure or acceptance criteria; information to be reported; deviations to the procedure that apply. IEC 60793-1-21 ado
