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INTERNATIONAL ISO
STANDARD 5580
Second edition
2023-11
Non-destructive testing — Industrial
radiographic illuminators —
Minimum requirements
Essais non destructifs — Négatoscopes utilisés en radiographie
industrielle — Exigences minimales
Reference number
© ISO 2023
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Published in Switzerland
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Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Characteristics of radiographic illuminators . 1
4.1 Mechanical and electrical construction . 1
4.2 Viewing screen . 1
4.3 Luminance . 2
4.4 Colour of light . 3
4.5 Diffusion of light . 3
4.6 Uniformity of illumination . 3
4.7 Disturbing light . 3
4.8 Anti-glare device . 3
4.9 Heating. 3
5 Determination of certain characteristics . 3
5.1 General . 3
5.2 Divergence and dispersion of light of diffusing screens . 3
5.3 Uniformity of screen luminance . 4
5.4 Nominal power consumption . 5
6 Marking . . 5
7 Recommendations for use . 5
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
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database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
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expressions related to conformity assessment, as well as information about ISO's adherence to
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee
SC 5, Radiographic testing, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 138, Non-destructive testing, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 5580:1985), which has been technically
revised.
The main changes are as follows:
— normative references added to Clause 2;
— exact specification for luminance measurement equipment required (4.3);
— statements on luminance control of illuminators added (4.3);
— range of permitted light colours has been added (4.4);
— “Lamps” replaced by “Light sources”, so that LEDs can be used too (7);
— “Film density” was replaced by “optical density” throughout the document;
— minor editorial corrections.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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INTERNATIONAL STANDARD ISO 5580:2023(E)
Non-destructive testing — Industrial radiographic
illuminators — Minimum requirements
1 Scope
The function of an industrial radiographic illuminator is to provide sufficient diffuse light for viewing
of developed radiographic films (radiographs).
This document specifies the minimum requirements for industrial radiographic illuminators used for
viewing radiographs.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
nd
CIE S 017/E, International Lighting Vocabulary, 2 Edition
ISO/CIE 19476, Characterization of the performance of illuminance
...