1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationOptical circuit boardsPart 4: Interface standards General and guidanceBS EN 62496-4:2011National forewordThis British Standard is the UK implementation of EN 62496-4:2011. It is
2、identical to IEC 62496-4:2011.The UK participation in its preparation was entrusted to Technical Committee GEL/86, Fibre optics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions
3、of a contract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 68355 8 ICS 31.180; 33.180.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committe
4、e on 31 March 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 62496-4:2011EUROPEAN STANDARD EN 62496-4 NORME EUROPENNE EUROPISCHE NORM March 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique E
5、uropisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62496-4:2011 E ICS 33.180.01 English version Optical circuit boards - Part
6、 4: Interface standards - General and guidance (IEC 62496-4:2011) Cartes circuits optiques - Partie 4: Normes dinterface - Gnralits et lignes directrices (CEI 62496-4:2011) Optische Leiterplatten - Teil 4: Schnittstellennormen - Allgemeines und Leitfaden (IEC 62496-4:2011) This European Standard was
7、 approved by CENELEC on 2011-03-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such
8、 national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own la
9、nguage and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
10、 Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 62496-4:2011EN 62496-4:2011 - 2 - Foreword The text of document 86/379/FDIS, future edition 1 of IEC 62496-4, prepared by IEC
11、 TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62496-4 on 2011-03-02. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identi
12、fying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-12-02 latest date by which the national standards conflicting with the EN have to be
13、withdrawn (dow) 2014-03-02 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62496-4:2011 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the
14、 standards indicated: IEC 60027 series NOTE Harmonized in EN 60027 series (not modified). IEC 60695-11-5 NOTE Harmonized as EN 60695-11-5. IEC 60825-1 NOTE Harmonized as EN 60825-1. IEC 60825-2 NOTE Harmonized as EN 60825-2. IEC 61300 series NOTE Harmonized in EN 61300 series (not modified). ISO 286
15、-1 NOTE Harmonized as EN ISO 286-1. ISO 1101 NOTE Harmonized as EN ISO 1101. ISO 7083 NOTE Harmonized as EN ISO 7083. _ BS EN 62496-4:2011- 3 - EN 62496-4:2011 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referen
16、ced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common mod
17、ifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60793-1-45 (mod) - Optical fibres - Part 1-45: Measurement methods and test procedures - Mode field diameter EN 60793-1-45 - BS EN 62496-4:2011 2 62496-4 IEC:2011 CONTENTS 1 Scope . 6 2 Normative refere
18、nces . 6 3 Terms and definitions . 6 3.1 General definitions 6 3.2 Core shape definitions . 7 4 Coordinates of I/O ports of waveguide OCB 9 4.1 Structural types of waveguide OCB . 9 4.2 Origin point and coordinate axis 11 4.2.1 General . 11 4.2.2 Origin point and coordinate axis by internal coordina
19、te 12 4.2.3 Origin point and axis by external coordinate 14 4.2.4 Origin point and axis employing both internal and external coordinates 15 5 Misalignment angle of I/O ports 16 5.1 General . 16 5.2 Misalignment angle of I/O port in edge type . 16 5.3 Misalignment angle in surface type I/O port . 18
20、6 Mirror angle 19 7 Hole . 21 8 Dimensioning system 22 9 Gauges 22 10 Tolerance grade of the OCB . 22 10.1 General . 22 10.2 Shape accuracy of the OCB body of fibre flexible OCB 23 10.3 Position accuracy of the OCB port/I/O port of fibre flexible OCB 23 10.4 Length accuracy of the OCB tails of fibre
21、 flexible OCB 24 Annex A (normative) OCB interfaces 25 Annex B (informative) Example of the OCB 28 Bibliography 30 Figure 1 Examples of shapes of square core (quasi-square made by extrapolation or interpolation) 8 Figure 2 Examples of shapes of circular core . 8 Figure 3 Six structural parameters of
22、 square core shape of waveguide OCB 9 Figure 4 Example of OCB with end face I/O ports at edge of board 10 Figure 5 Example of OCB with end face I/O type 10 Figure 6 Example of OCB with surface I/O ports 11 Figure 7 Example of OCB with surface I/O ports 11 Figure 8 Definition of origin point 1): A sp
23、ecific port is used as the origin point 12 Figure 9 Definition of origin point 2): Determination of an origin point at a place where there is no port (a mid-point of adjacent two ports at the centre of bottom line is used as the origin) 13 BS EN 62496-4:201162496-4 IEC:2011 3 Figure 10 Definition of
24、 the direction of coordinate axis 1): Use the direction of alignment of multiple ports 13 Figure 11 Definition of direction of coordinate axis 2): Along a specific optical circuit (only if the wire is recognizable) 13 Figure 12 Origin point and coordinate axis (1) 14 Figure 13 Origin point and coord
25、inate axis (2) 14 Figure 14 Origin point and direction of coordinate axis (combination of Figure 12 and Figure 13) . 15 Figure 15 Use of both internal coordinate and external coordinate systems: Internal for the origin point (a specific optical input/output port) and external for the direction of th
26、e axis (dedicated structures) 15 Figure 16 Use of both internal coordinate and external coordinate systems: Internal for the origin point (coordinates of a specific optical input/output port) and external for the direction of the axis (periphery of the board) . 16 Figure 17 Definition of misalignmen
27、t angle of I/O port in edge type 17 Figure 18 Definition of vertical and horizontal rotational misalignment angle of I/O port in edge type . 17 Figure 19 Definition of misalignment angle of I/O port in surface type 18 Figure 20 Definition of longitudinal and lateral misalignment angle of I/O port in
28、 surface type 19 Figure 21 Mirror angle 1 . 19 Figure 22 Mirror angle 2 . 19 Figure 23 Mirror angle 3 . 20 Figure 24 Mirror angle 4 . 20 Figure 25 Mirror tilt angle . 21 Figure 26 Example of optical alignment hole 21 Figure 27 Hole and objects to be measured . 22 Figure 28 Classification of shape ac
29、curacy of OCB body of fibre flexible OCB . 23 Figure B.1 Example of the fibre flexible OCB . 28 Figure B.2 Origin point and coordinate for the fibre flexible OCB 29 Table 1 The coordinate system, origin point and coordinate axis 12 BS EN 62496-4:2011 6 62496-4 IEC:2011 OPTICAL CIRCUIT BOARDS Part 4:
30、 Interface standards General and guidance 1 Scope This part of IEC 62496 covers general information on the subject of Optical Circuit Board (OCB) interfaces. It includes normative references, definitions and rules for creating and interpreting the standard drawings. 2 Normative references The follow
31、ing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-1-45, Optical fibres Part 1-45: Measurement metho
32、ds and test procedures Mode field diameter 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 General definitions 3.1.1 OCB interface sizes and relative locations for the features comprising the OCB. It also includes the location of the coordina
33、tes of the alignment mark 3.1.2 OCB body portion of an OCB where optical fibres/waveguides are fixed/fabricated to form an optical routing pattern. The typical shape of an OCB body is rectangular 3.1.3 shape of the OCB body outline of the OCB body which consists of a straight line and a curved line
34、NOTE The straight line is defined by coordinates of start point and end point, and the curved line is defined by the coordinates of the start and the end points of the curve and by radius of curvature. 3.1.4 OCB tail (OCB leg) projection from the OCB body for interconnection with optical fibre cable
35、s and/or optical components 3.1.5 length of the OCB tail distance between the edge of an OCB body and the end of the OCB tail protruding from the edge of the OCB body BS EN 62496-4:201162496-4 IEC:2011 7 NOTE If the OCB tail has a mark in the vicinity of its end, the OCB tail length is the distance
36、between the mark and the end of the OCB body. 3.1.6 OCB port position on the edge of the OCB body where OCB tails protrude from the OCB body NOTE Relative positional accuracy between the OCB port and alignment mark or origin point is important for connection with other boards or devices. The OCB por
37、t is defined only for the fibre flexible OCB. 3.1.7 position of the OCB port coordinates at the intersectional point of the central axis of the optical fibre and the edge of the OCB body NOTE The coordinates of the OCB port consisting of closely arrayed fibres shall be defined by the coordinates of
38、the OCB port closest to the origin point. EXAMPLE In a case where the OCB body of the fibre flexible OCB is put in the first quadrant and an outline or an angle of the OCB is in contact with the X-axis or the Y-axis, as shown in Figure B.2 of Annex B, the coordinates of origin are defined as the ori
39、gin point of the fibre flexible OCB. It is recommended to set one side of the OCB body parallel to the X-axis or the Y-axis. In another case where the alignment mark for assembly of optical components on the OCB is located near the I/O ports, the centre of the alignment mark is defined as the origin
40、 point of the OCB. 3.1.8 I/O port window in the OCB through which optical energy enters and/or exits NOTE The I/O port is located at the end of the OCB tail, at the edge of the OCB body or at the surface of the OCB where the OCB is connected to optical fibre cables and/or optical components. 3.1.9 a
41、lignment mark for assembly of OCB mark on the OCB body, typically a through hole in the OCB body, for assembly of the OCB to another board and/or equipment NOTE The coordinates of the alignment mark are defined by the coordinates at the centre of the mark. The alignment mark is used instead of a dat
42、um target in Annex A. 3.2 Core shape definitions There are two types of core shape, square or circular, for waveguide OCBs EXAMPLE 1 Square shape consists of four corners formed by extrapolating or interpolating an arbitrary shape by four straight lines, as shown in Figure 1. BS EN 62496-4:2011 8 62
43、496-4 IEC:2011 Figure 1 Examples of shapes of square core (quasi-square made by extrapolation or interpolation) EXAMPLE 2 Circular shape has round boundaries. It is not necessarily perfectly circular and includes elliptical shapes or any round shapes. Examples of circular shapes are shown in Figure
44、2. Figure 2 Examples of shapes of circular core The six structural parameters for the square core shape are shown in Figure 3. Structural parameters for the circle core shape are defined by NFP (near field pattern) observation of a cross section (see IEC 60793-1-45). 3.2.1 core width (top) upper hor
45、izontal component of the core shape 3.2.2 core width (bottom) lower horizontal component of the core shape 3.2.3 core height distance between the lower and upper horizontal lines Typical core cross-section (7) Typical core cross-section (8) Typical core cross-section (6) Typical core cross-section (
46、1) Typical core cross-section (2) Typical core cross-section (3) Typical core cross-section (4) Typical core cross-section (5) Typical core shape (1) Typical core shape (4) Typical core shape (2) Typical core shape (3) Typical core shape (5) IEC 018/11 IEC 019/11 BS EN 62496-4:201162496-4 IEC:2011 9
47、 3.2.4 core centre intersection point of two diagonal lines of a quadrangle consisting of four midpoints of four lines of the core shape, as illustrated in Figure 3 NOTE This intersection point corresponds to the centre of gravity in a system of material points. 3.2.5 core inner diameter diameter of
48、 an inscribing circle with its centre at the core centre 3.2.6 core outer diameter twice the distance between the core centre and the farthest corner of the core shape Figure 3 Six structural parameters of square core shape of waveguide OCB 4 Coordinates of I/O ports of waveguide OCB 4.1 Structural
49、types of waveguide OCB OCBs are divided into two types defined by the positions and orientations of their optical I/O ports. According to one type, the input / output port is defined by the exposed cross-section of a waveguide at an edge of the board (end face I/O type), as illustrated in Figure 4, or at an edge of a hole formed inside the area of the board, as illustrated in Figure 5. According to another type, the in
