Personal eye-protection - Eye-protectors for adjustment work on lasers and laser systems (laser adjustment eye-protectors)

This European Standard applies to laser adjustment filters and eye-protectors. These are filters and eye-protectors for use in adjustment work on lasers and laser systems as defined in EN 60825-1:2007 where hazardous radiation occurs in the visible spectral range of 400 nm to 700 nm. Filters specified in this European Standard reduce this radiation to values defined for lasers of class 2 (<= 1 mW for CW (continuous wave) lasers).
This European Standard defines the requirements, test methods and marking. A guide is given in Annex B with regard to selection and use.
EN 207 applies to eye-protection against accidental exposure to laser radiation.
NOTE   Before selecting eye protection according to this European Standard a risk assessment should first be undertaken (see Annex B).

Persönlicher Augenschutz - Augenschutzgeräte für Justierarbeiten an Lasern und Laseraufbauten (Laser-Justierbrillen)

Diese Europäische Norm gilt für Laser Justierfilter und Laser Justierbrillen. Dies sind Filter und Augenschutz¬geräte zum Einsatz bei Justierarbeiten an Lasern und Laseraufbauten nach EN 60825 1:2007, bei denen gefährliche Strahlung im sichtbaren Spektralbereich zwischen 400 nm und 700 nm auftritt. Filter nach dieser Europäischen Norm reduzieren diese Strahlung auf Werte, die für Laser der Klasse 2 ( 1 mW für Dauer¬strichlaser) festgelegt sind.
Diese Europäische Norm legt die Anforderungen, Prüfverfahren und die Kennzeichnung fest. Einen Leitfaden für die Auswahl und Benutzung enthält Anhang B.
EN 207 gilt für Augenschutzgeräte gegen zufällige Einwirkung von Laserstrahlung.
ANMERKUNG   Bevor ein Augenschutz nach dieser Europäischen Norm ausgewählt wird, sollte zuerst eine Risikobewertung durchgeführt werden (siehe Anhang B).

Protection individuelle de l'œil - Lunettes de protection pour les travaux de réglage sur les lasers et sur les systèmes laser (lunettes de réglage laser)

La présente Norme européenne s'applique aux filtres et lunettes de réglage laser. Il s’agit de filtres et de lunettes de protection utilisés pour les travaux de réglage des lasers et des systèmes laser tels que définis dans l’EN 60825-1:2007 pour lesquels le rayonnement dangereux se produit dans le domaine spectral visible compris entre 400 nm et 700 nm. Les filtres relevant de la présente Norme européenne permettent une atténuation du rayonnement jusqu'aux valeurs spécifiées pour les lasers de la classe 2 (≤ 1 mW pour les lasers continus (CW)).
La présente Norme européenne définit les spécifications, les méthodes d'essai et le marquage. Des recommandations pour le choix et l’utilisation de lunettes de protection laser figurent dans l'Annexe B.
Les lunettes de protection contre l’exposition accidentelle au rayonnement laser sont traitées dans l’EN 207.
NOTE   Avant de choisir une protection de l'œil conforme à la présente Norme européenne, il convient de réaliser au préalable une évaluation du risque (voir Annexe B).

Osebno varovanje oči - Varovala za zaščito oči pri nastavljanju laserjev in laserskih sistemov (očala za nastavitev laserjev)

Ta evropski standard velja za filtre za nastavitev laserjev in varoval za zaščito oči. To so filtri in varovala za zaščito oči za uporabo pri nastavljanju laserjev in laserskih sistemov, kot je določeno v EN 60825-1:2007, kjer prihaja do škodljivega sevanja v vidnem območju spektra od 400 nm do 700 nm. Filtri, določeni v tem evropskem standardu, znižujejo sevanje do vrednosti, ki so določene za laserje razreda 2 (≤ 1 mW za CW (trajno valovanje) laserje). Ta evropski standard določa zahteve, preskusne metode in označevanje. Vodilo v zvezi z izbiro in uporabo je podano v Dodatku B.  EN 207 velja za očala za zaščito pred nezgodno izpostavljenostjo laserskemu sevanju.

General Information

Status
Published
Publication Date
22-Dec-2009
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
03-Jun-2020
Completion Date
03-Jun-2020

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SLOVENSKI STANDARD
SIST EN 208:2010
01-marec-2010
1DGRPHãþD
SIST EN 208:1999
SIST EN 208:1999/A1:2003
2VHEQRYDURYDQMHRþL9DURYDOD]D]DãþLWRRþLSULQDVWDYOMDQMXODVHUMHYLQ
ODVHUVNLKVLVWHPRY RþDOD]DQDVWDYLWHYODVHUMHY
Personal eye-protection - Eye-protectors for adjustment work on lasers and laser
systems (laser adjustment eye-protectors)
Persönlicher Augenschutz - Augenschutzgeräte für Justierarbeiten an Lasern und
Laseraufbauten (Laser-Justierbrillen)

Protection individuelle de l'oeil - Lunettes de protection pour les travaux de réglage sur

les lasers et sur les systèmes laser (lunettes de réglage laser)
Ta slovenski standard je istoveten z: EN 208:2009
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN 208:2010 en,fr,de

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

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SIST EN 208:2010
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SIST EN 208:2010
EUROPEAN STANDARD
EN 208
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2009
ICS 13.340.20 Supersedes EN 208:1998
English Version
Personal eye-protection - Eye-protectors for adjustment work on
lasers and laser systems (laser adjustment eye-protectors)

Protection individuelle de l'œil - Lunettes de protection pour Persönlicher Augenschutz - Augenschutzgeräte für

les travaux de réglage sur les lasers et sur les systèmes Justierarbeiten an Lasern und Laseraufbauten (Laser-

laser (lunettes de réglage laser) Justierbrillen)
This European Standard was approved by CEN on 21 November 2009.

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 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 Management Centre has the same status as the

official versions.

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

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

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 208:2009: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 208:2010
EN 208:2009 (E)
Contents Page

Foreword ..............................................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Requirements .........................................................................................................................................4

3.1 Spectral transmittance of filters and frames ......................................................................................4

3.2 Luminous transmittance of filters ........................................................................................................5

3.3 Resistance of filters and frames to laser radiation ............................................................................5

3.4 Refractive values of filters and eye-protectors ..................................................................................6

3.5 Quality of material and surface of filters .............................................................................................6

3.6 Stability of filters and eye-protectors to ultraviolet radiation and to elevated temperature ..........6

3.7 Resistance of filters and frames to ignition by contact with hot surfaces ......................................7

3.8 Field of vision of eye-protectors ..........................................................................................................7

3.9 Construction of filters ...........................................................................................................................7

3.10 Construction of frames .........................................................................................................................7

3.11 Mechanical strength of eye-protectors................................................................................................7

4 Testing ....................................................................................................................................................8

4.1 General ....................................................................................................................................................8

4.2 Spectral transmittance of filters and frames ......................................................................................9

4.3 Luminous transmittance of filters ........................................................................................................9

4.4 Resistance of filters and frames to laser radiation ............................................................................9

4.5 Refractive value of filters and eye-protectors ....................................................................................9

4.6 Quality of material and surface of filters .......................................................................................... 10

4.7 Stability to UV radiation and stability to elevated temperature ..................................................... 10

4.8 Resistance of filters and frames to ignition by contact with hot surfaces ................................... 10

4.9 Field of vision of eye-protectors ....................................................................................................... 10

4.10 Determination of the protected range............................................................................................... 10

4.11 Frames ................................................................................................................................................. 10

4.12 Mechanical strength ........................................................................................................................... 10

5 Information supplied by the manufacturer ...................................................................................... 11

6 Marking ................................................................................................................................................ 11

Annex A (informative) Principle ...................................................................................................................... 14

A.1 Class 2 lasers ...................................................................................................................................... 14

A.2 Beam reduction and time base .......................................................................................................... 14

A.3 Resistance to laser radiation ............................................................................................................. 14

A.4 Example test report ............................................................................................................................ 16

Annex B (informative) Recommended use of laser adjustment eye-protectors ........................................ 18

B.1 General ................................................................................................................................................. 18

B.2 Continuous wave lasers ..................................................................................................................... 18

B.3 Pulsed lasers ....................................................................................................................................... 19

Annex C (informative) Significant technical changes between this European Standard and the

previous edition .................................................................................................................................. 21

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 89/686/EEC ....................................................................................... 22

Bibliography ..................................................................................................................................................... 23

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SIST EN 208:2010
EN 208:2009 (E)
Foreword

This document (EN 208:2009) has been prepared by 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 June 2010, and conflicting national standards shall be withdrawn at

the latest by June 2010.

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

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 208:1998.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.

The significant technical changes between this European Standard and the previous edition are detailed in

Annex C.

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, Cyprus, Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
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SIST EN 208:2010
EN 208:2009 (E)
1 Scope

This European Standard applies to laser adjustment filters and eye-protectors. These are filters and eye-

protectors for use in adjustment work on lasers and laser systems as defined in EN 60825-1:2007 where

hazardous radiation occurs in the visible spectral range of 400 nm to 700 nm. Filters specified in this

European Standard reduce this radiation to values defined for lasers of class 2 (≤ 1 mW for CW (continuous

wave) lasers).

This European Standard defines the requirements, test methods and marking. A guide is given in Annex B

with regard to selection and use.
EN 207 applies to eye-protection against accidental exposure to laser radiation.

NOTE Before selecting eye protection according to this European Standard a risk assessment should first be

undertaken (see Annex B).
2 Normative references

The following 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.
EN 166:2001, Personal eye-protection — Specifications
EN 167:2001, Personal eye-protection — Optical test methods
EN 168:2001, Personal eye-protection — Non-optical test methods

EN 207:2009, Personal eye-protection equipment — Filters and eye-protectors against laser radiation (laser

eye-protectors)
ISO 11664-1:2007, Colorimetry — Part 1: CIE standard colorimetric observers
ISO 11664-2:2007, Colorimetry — Part 2: CIE standard illuminants
3 Requirements
3.1 Spectral transmittance of filters and frames

When tested according to 4.2, the spectral transmittance values of the filters and the frames for the laser

wavelength shall be as given in Table 1.
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SIST EN 208:2010
EN 208:2009 (E)
Table 1 — Scale numbers, spectral transmittance and maximum laser power
Scale number Spectral transmittance CW and pulse Pulse lasers with
lasers with a a pulse duration
Filter Frame
pulse duration of of > 10 s to
-4 -4
≥ 2 ×××× 10 s 2 ×××× 10 s
Maximum laser Maximum pulse
power energy
W J
-2 -1 -1
RB 1 0,01 2 ×× 10
10 < τ (λ) ≤ 10 τ (λ) ≤ 10 ××
-3 -2 -2 -5
RB 2 0,1
10 < τ (λ) ≤ 10 τ (λ) ≤ 10 2 ×××× 10
-4 -3 -3
RB 3 1 2 ×× 10
10 < τ (λ) ≤ 10 τ (λ) ≤ 10 ××
-5 -4 -4 -3
RB 4 10
10 < τ (λ) ≤ 10 τ (λ) ≤ 10 2 ×××× 10
-6 -5 -5 -2
RB 5 100
10 < τ (λ) ≤ 10 τ (λ) ≤ 10 2 ×××× 10
3.2 Luminous transmittance of filters

When tested in accordance with 4.3, the luminous transmittance of the filter relative to the D65 standard

illuminant (see ISO 11664-2:2007) shall be at least 20 %. However, luminous transmittance lower than

20 % can be accepted provided that the manufacturer supplies information related to the increase of the

intensity of illumination at the relevant workplace in accordance with Clause 5.
3.3 Resistance of filters and frames to laser radiation

When tested according to 4.4, the filters and frames shall meet the requirements of 3.1 and shall not lose their

protective effect under the influence of laser radiation of the power (E) or energy density (H) as specified in

Table 2 for a period of at least 5 s and for 50 pulses in case of pulsed lasers. The values of energy density (H)

-1/4

for testing the resistance against laser radiation for pulsed lasers should be multiplied with the factor N ,

-9 -4

where N is the number of pulses in 5 s, if the pulse durations is between 10 and 2 × 10 s and the pulse

series is fast (frequency > 0,1 s ). The eye-protector shall not show any induced transmission (reversible

bleaching). No splinters shall come away from the side of the filter facing the eye under the influence of the

laser radiation. Any melting or other damage of the surface during the course of irradiation is not considered

negative if the protective effect is still maintained.
Table 2 — Power density and energy density for testing
Scale number Power density E Energy density H
2 2
W/m J/m
RB 1 2
1 × 10
RB 2 20
1 × 10
RB 3 200
1 × 10
RB 4 2 000
1 × 10
RB 5 20 000
1 × 10
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SIST EN 208:2010
EN 208:2009 (E)
3.4 Refractive values of filters and eye-protectors

When tested in accordance with 4.5, the maximum refractive values of filters and eye-protectors with no

corrective effect shall be as given in Table 3. They apply for the range specified in EN 166.

Table 3 — Maximum refractive values of filters and eye-protectors with no corrective effect

Spherical power Astigmatic power Prismatic power difference
horizontal vertical
base out base in
-1 -1
m m
cm/m cm/m cm/m
± 0,09 0,09 0,75 0,25 0,25
3.5 Quality of material and surface of filters
3.5.1 Material and surface defects

The material and surface defects of filters shall be tested in accordance with 4.6.1.

Except for a marginal area of 5 mm wide, filters shall be free from any material or surface defects likely to

impair the intended use, such as bubbles, scratches, inclusions, dull spots, mould marks, scoring or other

defects originating from the manufacturing process. No holes are allowed anywhere in the filters.

3.5.2 Diffusion of light

The reduced luminous coefficient l* of a filter, determined in accordance with 4.6.2, shall not be greater than

cd / m
l * = 0,50 (1)

3.6 Stability of filters and eye-protectors to ultraviolet radiation and to elevated temperature

3.6.1 Stability to ultraviolet radiation

When exposed to ultraviolet radiation in accordance with 4.7.1, the properties of filters and eye-protectors

shall not change to such an extent that they can no longer satisfy the requirements of 3.1, 3.2, 3.4 and 3.5.

The relative change in the luminous transmittance shall not exceed 10 %.
≤10% (2)

The spectral transmittance for the laser wavelengths shall, however, in no case exceed the maximum spectral

transmittance corresponding to the indicated scale number (see Table 1).
3.6.2 Stability to elevated temperature

After exposure to elevated temperature in accordance to 4.7.2, filters and eye-protectors shall satisfy the

requirements of 3.1, 3.2, 3.4 and 3.5. The relative change in the luminous transmittance shall not exceed 5 %.

≤ 5 % (3)
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SIST EN 208:2010
EN 208:2009 (E)

The spectral transmittance for the laser wavelengths shall, however, in no case exceed the maximum spectral

transmittance corresponding to the indicated scale number (see Table 1).
3.7 Resistance of filters and frames to ignition by contact with hot surfaces

When tested in accordance with 4.8, the filters and frames shall not ignite or continue to glow.

3.8 Field of vision of eye-protectors

Eye-protectors shall have a clear field of vision of at least 40° in the vertical and horizontal directions for each

eye when measured in accordance with 4.9.
3.9 Construction of filters

Filters shall be constructed so that when tested in accordance with 4.4 followed by a visual inspection no

splinters are detached from the side of the filter facing the eye. If the filters consist of several individual filters,

they shall be assembled in such a way that they cannot be interchanged.
3.10 Construction of frames

3.10.1 Filters shall not be interchangeable in the frame. An exception is possible if the protection to laser

radiation is determined only by the filter(s) and no part of the frame lies inside the protected range as defined

below. In such a case the marking of the eye-protector shall be on the filter(s) and there is no requirement for

the frame to satisfy 3.3 on resistance to laser radiation.

3.10.2 The frame shall be designed so that no laser radiation can penetrate from the side. This requirement

is met if for the horizontal angle range α from - 50° (nasal side) to + 90° (temporal side) the vertical angle β

range is protected within the following limit angles in degrees (°).
The upward limit β of the protected range shall be:
2 4
β =55 −0,0013()α −12 −1,3 ×10()α −12 (4)
The downward limit β of the protected range shall be:
2 4
−5 −6
β = −70 +10()α −12 +2,3×10(α −22) (5)
Testing shall be done in accordance with 4.10.
3.11 Mechanical strength of eye-protectors
3.11.1 Basic requirement

Filters for protection against laser radiation shall satisfy the requirement for minimum robustness as specified

in 7.1.4.1 of EN 166:2001.

The frames of the eye-protectors shall satisfy the requirements of 7.1.4.2 or 7.2.2 of EN 166:2001.

3.11.2 Optional requirement

If the mechanical strength of filters and eye-protectors against laser radiation is to satisfy more stringent

requirements, the requirements specified in 7.1.4.2 and 7.2.2 of EN 166:2001 shall be met.

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SIST EN 208:2010
EN 208:2009 (E)
4 Testing
4.1 General

The testing schedule in Table 4 shall be applied to testing of filters, frames and complete eye-protectors for

laser adjustment work. The sequences of testing 1 to 9 and 13 to 16 may be changed. At least 16 filters or

eight complete eye-protectors are required for testing. If testing for several wavelengths (wavelength ranges)

or testing conditions according to 4.4 and/or several optional requirements has to be done, more than

16 samples may be necessary.

Table 4 — Test schedule for filters, frames and complete eye-protectors for laser adjustment work

Order Requirements According Number of filter/frame samples
of to Clause
3 3 10 Depends on
testing
specification/requirement
1 Marking 6 + +
2 Material and 3.5.1 + +
surface defects
...

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