BS EN 62496-2-4:2013
$142.49
Optical circuit boards. Basic test and measurement procedures – Optical transmission test for optical circuit boards without input/output fibres
Published By | Publication Date | Number of Pages |
BSI | 2013 | 26 |
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 monitored 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 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 launch fibre and the OCB is not necessary.
PDF Catalog
PDF Pages | PDF Title |
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4 | Foreword Endorsement notice |
5 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
6 | English CONTENTS |
8 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviations 3.1 Terms and definitions |
9 | 3.2 Abbreviations 4 Measurement conditions |
10 | 5 Inspection methods 5.1 Equipment Figures Figure 1 – Optical transmission test system without I/O fibres for surface I/O type OCB Tables |
11 | 5.1.1 Light source system Figure 2 – Optical transmission test system without I/O fibres for end-face I/O type OCB |
12 | 5.1.2 Observation system Figure 3 – Schematic diagram of measurement of uniformity of illumination area Figure 4 – Example of obtained uniformity of illumination area |
13 | 5.1.3 Data processing unit Figure 5 – Example of obtained sensitivity of an image sensor (input uniformity within 1 %) |
14 | 5.1.4 Unit for holding the sample 5.2 Measurement procedures of relative optical loss 5.2.1 Preparation of light source |
15 | 5.2.2 Preparation of the optical observation system measuring equipment 5.2.3 Measuring coordinates of I/O ports 5.2.4 Capturing of optical images for control sample and samples to be measured Figure 6 – Position alignment of light source |
16 | 5.2.5 Image data processing (detection of I/O port range) 5.2.6 Calculation of relative loss Figure 7 – Example of captured image and extracted I/O port rangeby image binarization |
17 | 5.3 Evaluation of pass or fail Figure 8 – Calculation of the total detected intensity of extracted I/O port rangefrom detected intensity for each pixel |
18 | Annex A (informative) Example of an optical transmission test for an OCB without I/O fibres Table A.1 – Observation system Table A.2 – Light source Table A.3 – Samples to be measured |
19 | Figure A.1 – Example of relative optical loss measurement |
20 | Figure A.2 – Example of reproducibility of relative optical loss measurement |
21 | Annex B (informative) Measurement of input and output ports in offset positions Figure B.1 – Ray traces for OCBs with mirror having designatedmirror angle (left) and not designated one (right) |
22 | Figure B.2 – Difference of focus positions between without offset and with offset Figure B.3 – Optical images at surface of OCB plane (without offset) and offset position (with offset) |
23 | Bibliography |