1、 IEC 62496-2-4 Edition 1.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical circuit boards Basic test and measurement procedures Part 2-4: Optical transmission test for optical circuit boards without input/output fibres Cartes circuits optiques Procdures fondamentales dessais et de mesure
2、s Partie 2-4: Essai de transmission optique des cartes circuits optiques sans fibres dentre/sortie IEC62496-2-4:2013 colourinsideTHIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reprodu
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16、tte publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 62496-2-4 Edition 1.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical circuit boards Basic test and measurement procedures Part 2-4: Optical transmission test for optical circuit boards without input/output fibr
17、es Cartes circuits optiques Procdures fondamentales dessais et de mesures Partie 2-4: Essai de transmission optique des cartes circuits optiques sans fibres dentre/sortie INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 33.180.01 PRICE CODE CODE PRIX ISBN 97
18、8-2-83220-868-7 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette public
19、ation via un distributeur agr. colourinside 2 62496-2-4 IEC:2013 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6 3 Terms, definitions and abbreviations 6 3.1 Terms and definitions 6 3.2 Abbreviations 7 4 Measurement conditions . 7 5 Inspection methods 8 5.1 Equipment . 8 5.1.1 Light sou
20、rce system . 9 5.1.2 Observation system . 10 5.1.3 Data processing unit 11 5.1.4 Unit for holding the sample 12 5.2 Measurement procedures of relative optical loss . 12 5.2.1 Preparation of light source . 12 5.2.2 Preparation of the optical observation system measuring equipment . 13 5.2.3 Measuring
21、 coordinates of I/O ports 13 5.2.4 Capturing of optical images for control sample and samples to be measured 13 5.2.5 Image data processing (detection of I/O port range) 14 5.2.6 Calculation of relative loss . 14 5.3 Evaluation of pass or fail . 15 Annex A (informative) Example of an optical transmi
22、ssion test for an OCB without I/O fibres 16 Annex B (informative) Measurement of input and output ports in offset positions 19 Bibliography 21 Figure 1 Optical transmission test system without I/O fibres for surface I/O type OCB . 8 Figure 2 Optical transmission test system without I/O fibres for en
23、d-face I/O type OCB . 9 Figure 3 Schematic diagram of measurement of uniformity of illumination area 10 Figure 4 Example of obtained uniformity of illumination area 10 Figure 5 Example of obtained sensitivity of an image sensor (input uniformity within 1 %) 11 Figure 6 Position alignment of light so
24、urce . 13 Figure 7 Example of captured image and extracted I/O port range by image binarization . 14 Figure 8 Calculation of the total detected intensity of extracted I/O port range from detected intensity for each pixel 15 Figure A.1 Example of relative optical loss measurement . 17 Figure A.2 Exam
25、ple of reproducibility of relative optical loss measurement 18 Figure B.1 Ray traces for OCBs with mirror having designated mirror angle (left) and not designated one (right) . 19 Figure B.2 Difference of focus positions between without offset and with offset . 20 Figure B.3 Optical images at surfac
26、e of OCB plane (without offset) and offset position (with offset) 20 62496-2-4 IEC:2013 3 Table A.1 Observation system . 16 Table A.2 Light source . 16 Table A.3 Samples to be measured 16 4 62496-2-4 IEC:2013 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL CIRCUIT BOARDS BASIC TEST AND MEASUREME
27、NT PROCEDURES Part 2-4: Optical transmission test for optical circuit boards without input/output fibres FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The
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37、s 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. International Standard
38、IEC 62496-2-4 has been prepared by IEC technical committee 86: Fibre optics. The text of this standard is based on the following documents: FDIS Report on voting 86/449/FDIS 86/456/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in
39、the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 62496-2-4 IEC:2013 5 A list of all parts of the IEC 62496 series, published under the general title Optical circuit boards Basic test and measurement procedures, can be found on the IEC website. Fut
40、ure standards in this series will carry the new general title as cited above. Titles of existing standards in this series will be updated at the time of the next edition. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the I
41、EC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colour
42、s which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 62496-2-4 IEC:2013 OPTICAL CIRCUIT BOARDS BASIC TEST AND MEASUREMENT PROCEDURES Part 2-4: Optical transmission test for optical circuit boards witho
43、ut input/output fibres 1 Scope This part of IEC 62496 specifies the test method to decide whether to pass or fail an optical circuit board using direct illumination by a light. The input ports are directly illuminated and the optical intensity from the output ports of the optical circuit board is mo
44、nitored using an area image sensor. Excess optical losses are the calculated from total detected intensities of light from a sample to be measured and from a control sample. This method is used to illuminate uniformly the input port of the optical circuit board (OCB) with a larger area than the core
45、 area, obtain the radiance of an area image from the corresponding output port of the OCB using an area image sensor, and evaluate whether to pass or fail using the radiance obtained compared to that of a control sample. The advantage of this test method is that the alignment procedure between a lau
46、nch fibre and the OCB is not necessary. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
47、referenced document (including any amendments) applies. IEC 60068-1, Environmental testing Part 1: General and guidance 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms, definitions and abbreviations apply. 3.1.1 shading non-unif
48、ormity of detected intensity of an image caused by non-uniformity of the sensitivity of elements of an area image sensor and vignetting depending on the optical system Note 1 to entry: Correction of the non-uniformity of the detection sensitivity of elements of a uniform one is called “shading corre
49、ction“. 3.1.2 gamma value factor “” for a camera expressed by the following equation: (input optical intensity signal) = A (output image signal) where A is a proportionality constant Note 1 to entry: The input optical intensity is linearly proportional to the output image signal when = 1. 62496-2-4 IEC:2013 7 3.1.3 telecentric optical system optical system where the optical input
