Eye and face protection - Test methods - Part 2 : Physical optical properties (ISO 18526-2:2020)

This document specifies the reference test methods for determining the physical optical properties of
personal eye- and face -protectors.
This document does not apply to sunglasses for which the test methods are given in ISO 12311.
Other test methods may be used provided they have been shown to be equivalent.

Augen- und Gesichtsschutz - Prüfverfahren - Teil 2: Physikalisch optische Eigenschaften (ISO 18526-2:2020)

Dieses Dokument legt die Bezugsprüfverfahren für die Bestimmung der physikalisch-optischen Eigenschaften von persönlichen Augen- und Gesichtsschutzgeräten fest.
Dieses Dokument gilt nicht für etwaige Anforderungsnormen für Augen- und Gesichtsschutzprodukte, für die andere Prüfverfahren festgelegt sind.
Andere Prüfverfahren können angewendet werden, sofern ihre Gleichwertigkeit nachgewiesen ist und ihre Präzision die für das Referenzverfahren geforderte nicht übersteigt.

Protection des yeux et du visage - Méthodes d'essai - Partie 2: Propriétés optiques physiques (ISO 18526-2:2020)

Le présent document spécifie les méthodes d'essai de référence pour la détermination des propriétés optiques physiques des équipements de protection individuelle des yeux et du visage.
Le présent document ne s'applique à aucun produit relatif à la protection des yeux et du visage pour lequel les normes d'exigences spécifient d'autres méthodes d'essai.
D'autres méthodes d'essai peuvent être utilisées à condition que leur équivalence ait été démontrée et si les incertitudes de mesure qui leur sont associées n'excèdent pas celles exigées par la méthode de référence.

Varovanje oči in obraza - Preskusne metode - 2. del: Fizikalne optične lastnosti (ISO 18526-2:2020)

General Information

Status
Published
Public Enquiry End Date
24-Jul-2018
Publication Date
23-Apr-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
31-Mar-2020
Due Date
05-Jun-2020
Completion Date
24-Apr-2020

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SLOVENSKI STANDARD
SIST EN ISO 18526-2:2020
01-maj-2020

Varovanje oči in obraza - Preskusne metode - 2. del: Fizikalne optične lastnosti

(ISO 18526-2:2020)

Eye and face protection - Test methods - Part 2 : Physical optical properties (ISO 18526-

2:2020)

Augen- und Gesichtsschutz - Prüfverfahren - Teil 2: Physikalisch optische Eigenschaften

(ISO 18526-2:2020)

Protection des yeux et du visage - Méthodes d'essai - Partie 2: Propriétés optiques

physiques (ISO 18526-2:2020)
Ta slovenski standard je istoveten z: EN ISO 18526-2:2020
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN ISO 18526-2:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 18526-2:2020
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SIST EN ISO 18526-2:2020
EN ISO 18526-2
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 13.340.20
English Version
Eye and face protection - Test methods - Part 2 : Physical
optical properties (ISO 18526-2:2020)

Protection des yeux et du visage - Méthodes d'essai - Augen- und Gesichtsschutz - Prüfverfahren - Teil 2:

Partie 2: Propriétés optiques physiques (ISO 18526- Physikalisch optische Eigenschaften (ISO 18526-

2:2020) 2:2020)
This European Standard was approved by CEN on 25 January 2020.

CEN 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 national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18526-2:2020 E

worldwide for CEN national Members.
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SIST EN ISO 18526-2:2020
EN ISO 18526-2:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 18526-2:2020
EN ISO 18526-2:2020 (E)
European foreword

This document (EN ISO 18526-2:2020) has been prepared by Technical Committee ISO/TC 94

"Personal safety -- Personal protective equipment" in collaboration with Technical Committee CEN/TC

85 “Eye protective equipment” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by September 2020, and conflicting national standards

shall be withdrawn at the latest by September 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 18526-2:2020 has been approved by CEN as EN ISO 18526-2:2020 without any

modification.
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SIST EN ISO 18526-2:2020
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SIST EN ISO 18526-2:2020
INTERNATIONAL ISO
STANDARD 18526-2
First edition
2020-02
Eye and face protection — Test
methods —
Part 2:
Physical optical properties
Protection des yeux et du visage — Méthodes d'essai —
Partie 2: Propriétés optiques physiques
Reference number
ISO 18526-2:2020(E)
ISO 2020
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SIST EN ISO 18526-2:2020
ISO 18526-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 18526-2:2020
ISO 18526-2:2020(E)
Contents Page

Foreword ......................................................................................................................................................................................................................................vii

Introduction ............................................................................................................................................................................................................................viii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Preparatory information ............................................................................................................................................................................. 1

5 General test requirements ......................................................................................................................................................................... 2

6 Test methods for measuring transmittance — General ............................................................................................... 2

6.1 Uncertainty of measurement ...................................................................................................................................................... 2

6.2 Reporting compliance ....................................................................................................................................................................... 3

6.3 Applicability .............................................................................................................................................................................................. 3

6.4 Position and direction of measurement ............................................................................................................................ 3

6.5 Wavelength intervals ......................................................................................................................................................................... 3

6.6 Test report ................................................................................................................................................................................................... 3

7 Luminous transmittance .............................................................................................................................................................................. 3

7.1 Calculations of luminous transmittance from spectral values ......... .............................................................. 3

7.2 Test report ................................................................................................................................................................................................... 3

7.3 Broadband method of measurement of luminous transmittance .............................................................. 4

7.3.1 Apparatus ............................................................................................................................................................................... 4

7.3.2 Calibration ............................................................................................................................................................................. 4

7.3.3 Procedure ............................................................................................................................................................................... 4

7.3.4 Test reports for luminous transmittance values .................................................................................. 4

7.4 Measurement of uniformity of luminous transmittance .................................................................................... 4

7.4.1 Unmounted filter covering one eye ................................................................................................................. 4

7.4.2 Filter covering both eyes ........................................................................................................................................... 6

7.5 Transmittance matching at right and left reference points .............................................................................. 9

7.5.1 Test method .......................................................................................................................................................................... 9

7.5.2 Calculations .......................................................................................................................................................................10

7.5.3 Test report ..........................................................................................................................................................................10

8 Ultraviolet transmittance .........................................................................................................................................................................10

8.1 General ........................................................................................................................................................................................................10

8.2 Spectral transmittance and mean spectral transmittance .............................................................................10

8.3 Solar UV transmittance .................................................................................................................................................................10

8.4 Solar UV-A transmittance ............................................................................................................................................................10

8.5 Solar UV-B transmittance ............................................................................................................................................................10

8.6 Mean UV-A transmittance ...........................................................................................................................................................10

8.7 Mean UV-B transmittance ...........................................................................................................................................................11

8.8 Mean 380 nm to 400 nm transmittance .........................................................................................................................11

8.9 Test report ................................................................................................................................................................................................11

9 Blue-light transmittance ...........................................................................................................................................................................11

9.1 Solar blue-light transmittance ................................................................................................................................................11

9.1.1 Calculation of solar blue-light transmittance from spectral values ..................................11

9.1.2 Broadband method of measurement of solar blue-light transmittance .......................11

9.2 Blue-light transmittance from artificial sources .....................................................................................................11

9.2.1 Calculation of blue-light transmittance from artificial sources from

spectral values ................................................................................................................................................................11

9.2.2 Broadband method of measurement of blue-light transmittance from

artificial sources ............................................................................................................................................................12

9.2.3 Test report ..........................................................................................................................................................................12

10 IR transmittance ................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
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SIST EN ISO 18526-2:2020
ISO 18526-2:2020(E)

10.1 Near IR transmittance....................................................................................................................................................................12

10.1.1 Calculation ..........................................................................................................................................................................12

10.2 IR-A transmittance ............................................................................................................................................................................12

10.2.1 Calculation ..........................................................................................................................................................................12

10.3 IR-B transmittance ............................................................................................................................................................................12

10.3.1 Calculation ..........................................................................................................................................................................12

10.4 Solar IR transmittance ...................................................................................................................................................................12

10.4.1 Calculation ..........................................................................................................................................................................12

10.5 Test report ................................................................................................................................................................................................12

11 Relative visual attenuation coefficient for traffic signal light detection, Q ..............................13

signal

11.1 Calculation ...............................................................................................................................................................................................13

11.2 Test report ................................................................................................................................................................................................13

12 Spectral reflectance ........................................................................................................................................................................................13

12.1 Uncertainty of measurement ...................................................................................................................................................13

12.2 Position and direction of measurement .........................................................................................................................13

12.2.1 Specular spectral reflectance .............................................................................................................................13

12.2.2 Total spectral reflectance (specular included) .................. ..................................................................13

12.2.3 Total spectral reflectance (specular excluded) ...................................................................................14

12.2.4 0°/45° and 45°/0° geometry ..............................................................................................................................14

12.3 Wavelength intervals ......................................................................................................................................................................14

12.4 Test report ................................................................................................................................................................................................14

13 Luminous reflectance ...................................................................................................................................................................................14

13.1 Calculations .............................................................................................................................................................................................14

13.2 Test report ................................................................................................................................................................................................14

13.3 Luminous reflectance of mesh ................................................................................................................................................14

14 Scattered light ......................................................................................................................................................................................................15

14.1 Wide angle scatter .............................................................................................................................................................................15

14.1.1 Principle ...............................................................................................................................................................................15

14.1.2 Apparatus ............................................................................................................................................................................15

14.1.3 Test sample ........................................................................................................................................................................16

14.1.4 Test procedure ................................................................................................................................................................16

14.1.5 Calculation ..........................................................................................................................................................................16

14.1.6 Test report ..........................................................................................................................................................................17

14.2 Narrow angle scatter ......................................................................................................................................................................17

14.2.1 Principle ...............................................................................................................................................................................17

14.2.2 Test methods ....................................................................................................................................................................18

14.2.3 Test report ..........................................................................................................................................................................23

15 Polarization ............................................................................................................................................................................................................23

15.1 Plane of transmission .....................................................................................................................................................................23

15.1.1 Apparatus ............................................................................................................................................................................23

15.1.2 Test procedure ................................................................................................................................................................23

15.1.3 Test report ..........................................................................................................................................................................24

15.2 Polarizing efficiency ........................................................................................................................................................................24

15.2.1 Principle ...............................................................................................................................................................................24

15.2.2 Test procedure for the spectrophotometric method .....................................................................25

15.2.3 Test report ..........................................................................................................................................................................25

15.2.4 Test procedure for the broadband method ............................................................................................25

15.2.5 Test report ..........................................................................................................................................................................26

16 Photochromic lenses .....................................................................................................................................................................................26

16.1 Light source(s) to approximate the spectral distribution of solar radiation for air

mass 2 for testing ...............................................................................................................................................................................26

16.1.1 Radiation source using one lamp ...................................................................................................................26

16.1.2 Radiation source using two lamps .................. ...............................................................................................27

16.2 Conditioning for luminous transmittance in the faded state .......................................................................27

16.3 Measurement .........................................................................................................................................................................................28

iv © ISO 2020 – All rights reserved
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SIST EN ISO 18526-2:2020
ISO 18526-2:2020(E)

16.3.1 Principle ...............................................................................................................................................................................28

16.3.2 Faded state .........................................................................................................................................................................28

16.3.3 Darkened states .............................................................................................................................................................28

17 Automatic welding filters .........................................................................................................................................................................29

17.1 General ........................................................................................................................................................................................................29

17.2 Luminous transmittance in the light state ...................................................................................................................29

17.2.1 Measurement ...................................................................................................................................................................29

17.2.2 Test report ..........................................................................................................................................................................30

17.3 Luminous transmittance in the dark state ...................................................................................................................30

17.3.1 Measurement ...................................................................................................................................................................30

17.3.2 Test report ..........................................................................................................................................................................30

17.4 Shade number of welding filters with automatic shade number setting ..........................................30

17.4.1 Principle ...............................................................................................................................................................................30

17.4.2 Apparatus ............................................................................................................................................................................31

17.4.3 Test procedure ................................................................................................................................................................31

17.4.4 Test report ..........................................................................................................................................................................31

17.5 Luminous transmittance variation over time............................................................................................................31

17.5.1 Principle ...............................................................................................................................................................................31

17.5.2 Apparatus ............................................................................................................................................................................32

17.5.3 Test procedure ................................................................................................................................................................32

17.5.4 Test report ..........................................................................................................................................................................32

17.6 Blue-light transmittance for artificial sources ..........................................................................................................32

17.6.1 Measurement ...................................................................................................................................................................32

17.6.2 Test report ..........................................................................................................................................................................32

17.7 Uniformity of luminous transmittance for flat filters .................................

...

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