SIST EN 208:2010
(Main)Personal eye-protection - Eye-protectors for adjustment work on lasers and laser systems (laser adjustment eye-protectors)
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 eyeprotectors 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.
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 Augenschutzgeräte zum Einsatz bei Justierarbeiten an Lasern und Laseraufbauten, entsprechend der EN 60825 1 (d.h. die Strahlung von LEDs (Licht Emittierenden Dioden) ist eingeschlossen), bei denen gefährliche Strahlung im sichtbaren Spektralbereich zwischen 400 nm und 700 nm auftritt. Laser Justierbrillen und Laser Justierfilter nach dieser Norm schwächen diese Strahlung auf Werte ab, die für Laser der Klasse 2 ( 1 mW für Dauerstrichlaser) gelten. In diesem Falle tragen Abwendungsreaktionen einschließlich des Lidschlussreflexes zum Augenschutz bei.
Die Norm legt Anforderungen, Prüfverfahren und Kennzeichnung fest. Einen Leitfaden für die Auswahl und Benutzung gibt Anhang B.
Falls Abwendungsreaktionen einschließlich des Lidschlussreflexes nicht unterstellt werden, und für Laserstrahlung außerhalb des sichtbaren Spektralbereiches gilt zum Schutz der Augen gegen Laserstrahlung EN 207.
ANMERKUNG Bevor Filter nach dieser Norm ausgewählt werden, sollte eine Risokoanalyse durchgeführt werden (siehe Anhang B).
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)
La présente norme s'applique aux filtres et lunettes de réglage laser. Il s’agit de filtres et lunettes de protection utilisés pour les travaux de réglage des lasers et des systèmes laser tels que définis dans l’EN 60 825-1 (comme par exemple le rayonnement des diodes électroluminescentes (LED)) le rayonnement dangereux se produit dans le domaine spectral visible compris entre 400 nm et 700 nm. Les filtres objet de la présente norme permettent une atténuation du rayonnement jusqu'aux valeurs spécifiées pour les lasers de la classe 2 ( 1 mW pour les lasers continus (CW)). A ce niveau de rayonnement, les réflexes de défense, y compris le réflexe palpébral, participent à la protection de l'œil.
La présente norme définit les spécifications, les méthodes d'essai et le marquage. Des instructions pour le choix et l’utilisation de lunettes de protection laser figurent dans l'Annexe B.
Les lunettes de protection laser n’entraînant pas de réflexes de défense, y compris le réflexe palpébral et les lasers dont le rayonnement s’étend au-delà du domaine spectral dans le visible sont traités 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
Relations
Standards Content (Sample)
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.
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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
2
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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.
3
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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
-9
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
-6
-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
-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
-1
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
4
RB 1 2
1 × 10
5
RB 2 20
1 × 10
6
RB 3 200
1 × 10
7
RB 4 2 000
1 × 10
8
RB 5 20 000
1 × 10
5
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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
2
cd / m
l * = 0,50 (1)
lx
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 %.
∆τ
v
≤10% (2)
τ
v
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 %.
∆τ
v
≤ 5 % (3)
τ
v
6
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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:
u
2 4
−6
β =55 −0,0013()α −12 −1,3 ×10()α −12 (4)
u
The downward limit β of the protected range shall be:
l
2 4
−5 −6
β = −70 +10()α −12 +2,3×10(α −22) (5)
l
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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