{"id":248268,"date":"2024-10-19T16:21:14","date_gmt":"2024-10-19T16:21:14","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60793-1-202014\/"},"modified":"2024-10-25T11:30:21","modified_gmt":"2024-10-25T11:30:21","slug":"bs-en-60793-1-202014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60793-1-202014\/","title":{"rendered":"BS EN 60793-1-20:2014"},"content":{"rendered":"

This part of IEC 60793 establishes uniform requirements for measuring the geometrical characteristics of uncoated optical fibres.<\/p>\n

The geometry of uncoated optical fibres directly affect splicing, connectorization and cabling and so are fundamental parameters requiring careful specification, quality control, and thus measurement.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nForeword
Endorsement notice <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
9<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
10<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and symbols <\/td>\n<\/tr>\n
12<\/td>\n4 Overview of method
4.1 General
4.2 Scanning methods
4.2.1 General <\/td>\n<\/tr>\n
13<\/td>\n4.2.2 One-dimensional scan sources of error
Figures
Figure\u00a01 \u2013 Sampling on a chord <\/td>\n<\/tr>\n
14<\/td>\n4.2.3 Multidimensional scanning
Figure\u00a02 \u2013 Scan of a non-circular body <\/td>\n<\/tr>\n
15<\/td>\n4.3 Data reduction
4.3.1 Simple combination of few-angle scan sets
4.3.2 Ellipse fitting of several-angle or raster data sets
5 Reference test method
6 Apparatus
7 Sampling and specimens
7.1 Specimen length
7.2 Specimen end face
8 Procedure <\/td>\n<\/tr>\n
16<\/td>\n9 Calculations
10 Results
11 Specification information <\/td>\n<\/tr>\n
17<\/td>\nAnnex A (normative) Requirements specific to Method A \u2013 Refracted near-field
A.1 Introductory remarks
A.2 Apparatus
A.2.1 Typical arrangement
A.2.2 Source
A.2.3 Launch optics <\/td>\n<\/tr>\n
18<\/td>\nA.2.4 XYZ positioner (scanning stage)
A.2.5 Blocking disc
Figure A.1 \u2013 Refracted near-field method \u2013 Cell
Figure A.2 \u2013 Typical instrument arrangement <\/td>\n<\/tr>\n
19<\/td>\nA.2.6 Collection optics and detector
A.2.7 Computer system
A.2.8 Immersion cell
A.3 Sampling and specimens
A.4 Procedure
A.4.1 Load and centre the fibre <\/td>\n<\/tr>\n
20<\/td>\nA.4.2 Line scan
A.4.3 Raster scan
A.4.4 Calibration
A.5 Index of refraction calculation <\/td>\n<\/tr>\n
21<\/td>\nFigure A.3 \u2013 Typical index profile line scan of a category A1 fibre
Figure A.4 \u2013 Typical raster index profile on a category A1 fibre <\/td>\n<\/tr>\n
22<\/td>\nA.6 Calculations
A.7 Results <\/td>\n<\/tr>\n
23<\/td>\nAnnex B (normative) Requirements specific to Method B \u2013 Transmitted near-field
B.1 Introductory remarks
B.2 Apparatus
B.2.1 Typical arrangement
Figure B.1 \u2013 Typical arrangement, grey scale technique <\/td>\n<\/tr>\n
24<\/td>\nB.2.2 Light sources
Figure B.2 \u2013 Typical arrangement, mechanical scanning technique <\/td>\n<\/tr>\n
25<\/td>\nB.2.3 Fibre support and positioning apparatus
B.2.4 Cladding mode stripper
B.2.5 Detection <\/td>\n<\/tr>\n
26<\/td>\nB.2.6 Magnifying optics <\/td>\n<\/tr>\n
27<\/td>\nB.2.7 Video image monitor (video grey-scale technique)
B.2.8 Computer
B.3 Sampling and specimens
B.4 Procedure
B.4.1 Equipment calibration
B.4.2 Measurement <\/td>\n<\/tr>\n
28<\/td>\nFigure B.3 \u2013 Typical 1-D near-field scan, category A1 core <\/td>\n<\/tr>\n
29<\/td>\nB.5 Calculations
B.6 Results
Figure B.4 – Typical raster near-field data, category A1 fibre <\/td>\n<\/tr>\n
30<\/td>\nAnnex C (normative) Edge detection and edge table construction
C.1 Introductory remarks
C.2 Boundary detection by decision level
C.2.1 General approach <\/td>\n<\/tr>\n
31<\/td>\nC.2.2 Class A multimode fibre core reference level and k factor
Figure C.1 \u2013 Typical one-dimensional data set, cladding only <\/td>\n<\/tr>\n
32<\/td>\nC.2.3 Class B and C single-mode fibres
C.2.4 Direct geometry computation of one-dimensional data
Figure C.2 \u2013 Typical graded index core profile <\/td>\n<\/tr>\n
33<\/td>\nC.3 Assembling edge tables from raw data
C.3.1 General
C.3.2 Edge tables from raster data
Figure C.3 \u2013 Raster data, cladding only <\/td>\n<\/tr>\n
34<\/td>\nC.3.3 Edge tables from multi-angular one-dimensional scans <\/td>\n<\/tr>\n
35<\/td>\nAnnex D (normative) Edge table ellipse fitting and filtering
D.1 Introductory remarks
D.2 General mathematical expressions for ellipse fitting <\/td>\n<\/tr>\n
36<\/td>\nD.3 Edge table filtering <\/td>\n<\/tr>\n
37<\/td>\nD.4 Geometric parameter extraction <\/td>\n<\/tr>\n
38<\/td>\nAnnex E (informative) Fitting category A1 core near-field data to a power law model
E.1 Introductory remarks
E.2 Preconditioning data for fitting
E.2.1 Motivation
E.2.2 Transformation of a two-dimensional image to one-dimensionalradial near-field <\/td>\n<\/tr>\n
40<\/td>\nFigure E.1 \u2013 Filtering concept <\/td>\n<\/tr>\n
41<\/td>\nE.2.3 Pre-processing of one-dimensional near-field data <\/td>\n<\/tr>\n
42<\/td>\nFigure E.2 \u2013 Illustration of 1-D near-field preconditioning, typical video line <\/td>\n<\/tr>\n
43<\/td>\nE.2.4 Baseline subtraction
E.3 Fitting a power-law function to an category A1 fibre near-field profile <\/td>\n<\/tr>\n
45<\/td>\nAnnex F (informative) Mapping class A core diameter measurements
F.1 Introductory remarks
F.2 Mapping function <\/td>\n<\/tr>\n
46<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Optical fibres – Measurement methods and test procedures. Fibre geometry<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2016<\/td>\n48<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":248270,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[649,2641],"product_tag":[],"class_list":{"0":"post-248268","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-180-10","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/248268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/248270"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=248268"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=248268"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=248268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}