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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
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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
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
BS EN 62496-2-4:2013
$142.49