ISO 11553-1:2020

INTERNATIONAL ISO
STANDARD 11553-1
Second edition
2020-04
Safety of machinery — Laser
processing machines —
Part 1:
Laser safety requirements
Sécurité des machines — Machines à laser —
Partie 1: Exigences de sécurité laser
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Hazards generated by laser radiation . 5
4.1 General . 5
4.2 Laser radiation hazards/sources of laser radiation emission . 6
4.3 Laser radiation hazards induced by external effects (interferences) . 7
4.4 Characteristics of laser radiation . 7
5 Safety requirements and measures . 8
5.1 General requirements . 8
5.2 Risk assessment with regard to laser radiation hazards . 8
5.3 Implementation of risk reduction measures. 9
5.3.1 General. 9
5.3.2 Safety measures against laser radiation hazards in dependence of the locations . 9
5.3.3 Safety measures against laser radiation hazards.10
5.3.4 Engineering control measures .13
6 Verification of the safety requirements and risk reduction measures .14
7 Information for use .15
8 Labelling .16
Annex A (informative) Potential hazards .18
Bibliography .21
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
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee
SC 9, Laser and electro-optical systems, in collaboration with IEC/TC 76, Optical radiation safety and laser
equipment.
This second edition cancels and replaces the first edition (ISO 11553-1:2005), which has been technically
revised with the following main changes:
— the terms "beam delivery systems", "beam path components", "beam shaping components", "beam
switching components" and "fibre optic cable" and "fibre connector" were added;
— the document was restructured;
— the Title was adapted;
— other hazards than laser radiation hazards are not considered in this document but are described
in Annex A;
— operating modes (automatic mode, setting mode, manual intervention mode, service mode) and the
operating mode selector switch were added;
— Clause 5 is separated in requirements regarding different locations and the different modes of
operation;
— in Clause 6 the verification procedures were described in more detail;
— Annex B was deleted.
A list of all the parts of ISO 11553 can be found on the ISO website.
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.
iv © ISO 2020 – All rights reserved

Introduction
The Machinery Safety Directive issued by the European Parliament and the Council of the EC outlines
essential and mandatory requirements that must be met in order to ensure that machinery is safe. In
response, CEN/CENELEC initiated a programme to produce safety standards for machines and their
applications. This document is one in that series.
It has been prepared as a harmonized standard to provide a means of conforming to the essential safety
requirements of the Machinery Directive and associated EFTA Regulations.
This document is a type B standard as stated in ISO 12100. The provisions of this document may be
supplemented or modified by a type C standard.
For machines which are covered by the scope of a type C standard and which have been designed and
built according to the provision of that standard, the provisions of that type C standard take precedence
over the provisions of this type B standard.
The purpose of this document is to prevent injuries to persons by
— listing potential laser radiation hazards generated by machines containing lasers,
— specifying safety measures and verifications necessary for reducing the risk caused by specific
hazardous conditions,
— providing references to pertinent standards, and
— specifying the information which is to be supplied to the users so that they can establish proper
procedures and precautions.
INTERNATIONAL STANDARD ISO 11553-1:2020(E)
Safety of machinery — Laser processing machines —
Part 1:
Laser safety requirements
1 Scope
This document describes laser radiation hazards arising in laser processing machines, as defined in 3.7.
It also specifies the safety requirements relating to laser radiation hazards, as well as the information
to be supplied by the manufacturers of such equipment (in addition to that prescribed by IEC 60825).
Requirements dealing with noise as a hazard from laser processing machines are included in
ISO 11553-3:2013.
This document is applicable to machines using laser radiation to process materials.
It is not applicable to laser products, or equipment containing such products, which are manufactured
solely and expressly for the following applications:
— photolithography;
— stereolithography;
— holography;
— medical applications (per IEC 60601-2-22);
— data storage.
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.
ISO 3864 (all parts), Graphical symbols — Safety colours and safety signs
ISO 11145:2018, Optics and photonics — Lasers and laser-related equipment — Vocabulary and symbols
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849-2:2012, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13850:2012, Safety of machinery — Emergency stop function — Principles for design
IEC 60204-1:2016, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60825-1:2014, Safety of laser products — Part 1: Equipment classification and requirements
IEC 60825-4:2006, Safety of laser products — Part 4: Laser guards
IEC 62061:2005, Safety of machinery — Functional safety of safety-related electrical, electronic and
programmable electronic control systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11145:2018, ISO 12100:2010,
IEC 60825-1:2014 and IEC 60825-4:2006 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp.
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
beam delivery system
system comprised of all components, including all optical beam components and potential beam paths
and enclosures, which when combined, transfer laser radiation emitted from the laser (according to
definition in IEC 60825-1:2014) to the workpiece. The beam delivery system can include all elements
for guiding, shaping and switching the laser beams as well as the enclosure of and support for the beam
path components
[SOURCE: IEC 60825-4:2006/AMD 2:2011, G.2.1, modified — replaced "workpiece. These components may
include" by "workpiece and where the components can include" and changed laser beam to laser beams.]
3.2
beam path component
optical component which lies on a defined beam path
Note 1 to entry: See IEC 60825-1:2014, 3.16.
EXAMPLE A beam steering mirror, a focus lens, a fibre optic cable or a fibre optic cable connector.
3.3
beam shaping component
optical component integrated in the beam path to transform the profile or cross-section of the laser
beam by means of apertures, reflective, refractive or diffractive optical components
EXAMPLE Lens or integrating optical element for hardening applications.
3.4
beam switching component
optical component or an assembly of components introduced in the beam path to direct or divert, under
external control, the beam path along (a) predetermined direction(s)
Note 1 to entry: The external control allows the beam path to be switched from one predetermined direction to
another.
3.5
fibre optic cable
optical beam guiding component that enables the transfer of laser radiation along a transparent medium
Note 1 to entry: The fibre optic cable can be equipped with sensors to monitor breakage and/or temperature.
Note 2 to entry: A fibre optic cable can have a glass or another core that carries the laser radiation and
is surrounded by cladding. The outside of the fibre is protected by cladding and can
...