Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for direct observation of the sun

This European Standard specifies physical properties (mechanical, optical etc.) for sunglasses and sunglare filters of nominal plano power which are not prescription lenses, intended for protection against solar radiation for general use, for social and domestic purposes, including road use and driving. This European Standard specifies also requirements for filters for the direct observation of the sun (e.g. during eclipses). Guidance for selection and use of these filters is given in Annex E. For sunglasses and sunglare filters for industrial use, EN 166 and EN 172 apply.
This European Standard does not apply to eyewear for protection against radiation from artificial light sources, such as those used in solaria. EN 170 applies for these filters.
This European Standard does not apply to ski goggles, for which EN 174 applies, or other types of eye protection used for leisure activities.
This European Standard does not apply to sunglasses and filters that have been medically prescribed for attenuating solar radiation.

Persönlicher Augenschutz - Sonnenbrillen und Sonnenschutzfilter für den allgemeinen Gebrauch und Filter für die direkte Beobachtung der Sonne

Dieses Dokument legt die physikalischen Eigenschaften (mechanische, optische usw.) von Sonnenbrillen und Sonnenschutzfiltern mit Nennbereich Null fest, die keine Korrektionsbrillengläser sind, welche zum Schutz gegen Sonnenstrahlung für den allgemeinen Gebrauch, den gesellschaftlichen sowie privaten Bereich, einschließlich Autofahren und Straßenverkehr vorgesehen sind. Außerdem legt dieses Dokument Anforderungen an Filter für die direkte Betrachtung der Sonne (z. B. während einer Sonnenfinsternis) fest. Ein Leitfaden für die Auswahl und Benutzung dieser Filter ist in Anhang E angegeben. Für Sonnenbrillen und Sonnenschutzfilter für den gewerblichen Gebrauch gelten EN 166 und EN 172.
Das vorliegende Dokument gilt nicht für den Schutz des Auges gegen die Strahlung künstlicher Lichtquellen, z. B. von Solarien. Diese Filter müssen EN 170 entsprechen.
Dieses Dokument gilt weder für Skibrillen, für die EN 174 gilt, noch für andere Augenschutzgeräte für Freizeitaktivitäten.
Ferner gilt dieses Dokument nicht für Sonnenbrillen und Filter, die aus medizinischen Gründen zur Dämpfung von Sonnenstrahlung verschrieben werden.

Équipement de protection individuelle de l'oeil - Lunettes solaires et filtres de protection contre les rayonnements solaires pour usage général et filtres pour observation directe du soleil

La présente Norme européenne spécifie les propriétés physiques (mécaniques, optiques, etc.) des lunettes et des filtres de protection contre les rayonnements solaires de puissance nominale nulle et qui ne sont pas des verres de prescription prévus pour l’usage général, privé ou public, y compris pour la conduite automobile et pour les usagers de la route. La présente Norme européenne spécifie également des exigences relatives aux filtres pour observation directe du soleil (par exemple au cours d’éclipses). L'Annexe E constitue un guide de sélection et d'utilisation de ces filtres. L'EN 166 et l'EN 172 sont applicables aux lunettes et aux filtres de protection contre les rayonnements solaires pour l'usage industriel.
La présente Norme européenne n'est pas applicable aux équipements de protection de l'oeil contre les rayonnements des sources de lumière artificielle, tels que ceux des solariums. L'EN 170 s'applique à ce type de filtres.
La présente Norme européenne n'est pas applicable aux masques pour le ski, pour lesquels l’EN 174 s’applique, ni aux autres types d'équipements de protection de l'oeil utilisés dans le cadre d'activités de loisirs.
La présente Norme européenne ne s'applique pas aux lunettes solaires et aux filtres permettant d'atténuer le rayonnement solaire médicalement prescrits.

Osebna oprema za varovanje oči – Sončna očala ter sončni filtri za splošno uporabo in filtri za neposredno opazovanje sonca

General Information

Status
Withdrawn
Publication Date
06-Sep-2005
Withdrawal Date
11-Sep-2007
Current Stage
9960 - Withdrawal effective - Withdrawal
Due Date
12-Sep-2007
Completion Date
12-Sep-2007

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SLOVENSKI STANDARD
SIST EN 1836:2005
01-november-2005
1DGRPHãþD
SIST EN 1836:1998
SIST EN 1836:1998/A1:2001
SIST EN 1836:1998/A2:2004
2VHEQDRSUHPD]DYDURYDQMHRþL±6RQþQDRþDODWHUVRQþQLILOWUL]DVSORãQR
XSRUDERLQILOWUL]DQHSRVUHGQRRSD]RYDQMHVRQFD

Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for

direct observation of the sun

Persönlicher Augenschutz - Sonnenbrillen und Sonnenschutzfilter für den allgemeinen

Gebrauch und Filter für die direkte Beobachtung der Sonne

Équipement de protection individuelle de l'oeil - Lunettes solaires et filtres de protection

contre les rayonnements solaires pour usage général et filtres pour observation directe

du soleil
Ta slovenski standard je istoveten z: EN 1836:2005
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN 1836:2005 en

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

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 1836
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2005
ICS 13.340.20 Supersedes EN 1836:1997
English Version
Personal eye-equipment - Sunglasses and sunglare filters for
general use and filters for direct observation of the sun

Équipement de protection individuelle de l'oeil - Lunettes Persönlicher Augenschutz - Sonnenbrillen und

solaires et filtres de protection contre les rayonnements Sonnenschutzfilter für den allgemeinen Gebrauch und Filter

solaires pour usage général et filtres pour observation für die direkte Beobachtung der Sonne

directe du soleil
This European Standard was approved by CEN on 28 July 2005.

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 Central Secretariat 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 Central Secretariat has the same status as the official

versions.

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

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

Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1836:2005: E

worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 1836:2005 (E)
Contents
Page

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

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

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

3 Terms and definitions.........................................................................................................................5

4 Filter requirements..............................................................................................................................9

4.1 Transmittance .....................................................................................................................................9

4.2 Optical power of oculars ..................................................................................................................13

4.3 Scattered light ...................................................................................................................................14

4.4 Material and surface quality.............................................................................................................15

4.5 Robustness .......................................................................................................................................15

4.6 Resistance to radiation.....................................................................................................................15

4.7 Ignition...............................................................................................................................................16

5 Requirements for complete sunglasses (frames with filters)........................................................16

5.1 General ..............................................................................................................................................16

5.2 General construction ........................................................................................................................16

5.3 Mechanical requirements .................................................................................................................16

5.4 Ignition...............................................................................................................................................16

5.5 Materials for the manufacture of complete sunglasses.................................................................17

6 Testing ...............................................................................................................................................17

6.1 General ..............................................................................................................................................17

6.2 Transmittance ...................................................................................................................................17

6.3 Optical power values ........................................................................................................................22

6.4 Scattered light ...................................................................................................................................22

6.5 Material and surface quality.............................................................................................................22

6.6 Robustness .......................................................................................................................................23

6.7 Resistance to radiation.....................................................................................................................23

6.8 Ignition...............................................................................................................................................24

6.9 Conditioning and test conditions for complete sunglasses..........................................................24

6.10 Test for mechanical requirements for complete sunglasses ........................................................25

7 Information and labelling..................................................................................................................27

7.1 General ..............................................................................................................................................27

7.2 Complete sunglasses .......................................................................................................................27

7.3 Uncut finished lenses and replacement lenses (unmounted sunglass filters) ............................29

7.4 Transmittance or reflectance claims ...............................................................................................29

7.5 Robustness claims ...........................................................................................................................29

Annex A (normative) Cut-on filter for UV filtering ......................................................................................30

Annex B (normative) Spectral functions for the calculation of luminous transmittance and

relative visual attenuation coefficients (quotients) ........................................................................32

Annex C (normative) Spectral functions for the calculation of solar UV transmittance values and

blue-light transmittance ...................................................................................................................34

Annex D (normative) Spectral function for the calculation of infrared transmittance.............................36

Annex E (informative) Use of sunglare filters.............................................................................................38

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

Requirements of EU Directive 89/686/EEC......................................................................................41

Bibliography...................................................................................................................................................43

---------------------- Page: 3 ----------------------
EN 1836:2005 (E)
Foreword

This European Standard (EN 1836:2005) 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 March 2006, and conflicting national standards shall be withdrawn at

the latest by March 2006.
This European Standard supersedes EN 1836:1997.

This European Standard 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.

For relationship with EU Directive, see informative Annex ZA, which is an integral part of this European

Standard.

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

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,

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

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland

and United Kingdom.
---------------------- Page: 4 ----------------------
EN 1836:2005 (E)
1 Scope

This European Standard specifies physical properties (mechanical, optical etc.) for sunglasses and sunglare

filters of nominal plano power which are not prescription lenses, intended for protection against solar radiation

for general use, for social and domestic purposes, including road use and driving. This European Standard

specifies also requirements for filters for the direct observation of the sun (e.g. during eclipses). Guidance for

selection and use of these filters is given in Annex E. For sunglasses and sunglare filters for industrial use,

EN 166 and EN 172 apply.

This European Standard does not apply to eyewear for protection against radiation from artificial light sources,

such as those used in solaria. EN 170 applies for these filters.

This European Standard does not apply to ski goggles, for which EN 174 applies, or other types of eye

protection used for leisure activities.

This European Standard does not apply to sunglasses and filters that have been medically prescribed for

attenuating solar radiation.
2 Normative references

The following referenced documents are indispensable for the application of this European Standard. For

dated references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
EN 165:1995, Personal eye protection - Vocabulary
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 1811, Reference test method for release of nickel from products intended to come into direct and

prolonged contact with the skin

ENV 14027, Method for the simulation of wear before the detection of nickel release from coated metal and

combination spectacle frames
CIE 85:1989, Solar spectral irradiance

ISO 8624:2002, Ophthalmic optics -- Spectacle frames -- Measuring system and terminology

ISO/CIE 10526:1999, CIE standard illuminants for colorimetry
ISO/CIE 10527:1991, CIE standard colorimetric observers
IEC 60050-845:1987, International Electrotechnical vocabulary – Lighting
---------------------- Page: 5 ----------------------
EN 1836:2005 (E)
3 Terms and definitions

For the purposes of this European Standard, the terms and definitions given in EN 165:1995 and IEC 60050-

845:1987 and the following apply.
3.1
absorptance (absorption)
absorptance is the difference 1 minus transmittance minus reflectance

NOTE Some manufacturers use the term absorption and specify the value of the absorption as the difference 1

minus the luminous transmittance.
3.2
degree of polarisation, P
defined as:
τ −τ
pmax pmin
P =
τ +τ
pmax pmin
where

τ is the maximum values of luminous transmittance as determined with linearly polarised radiation;

pmax

τ is the minimum values of luminous transmittance as determined with linearly polarised radiation.

pmin
3.3
luminous transmittance of photochromic sunglare filters

five different values of the luminous transmittance of photochromic sunglare filters are defined by this

European Standard:
τ luminous transmittance in the faded state as reached at 23 °C after specified
conditioning;
luminous transmittance in the darkened state as reached at 23 °C after specified
irradiation simulating mean outdoor conditions;
luminous transmittance in the darkened state as reached at 5 °C after specified
irradiation simulating outdoor conditions at low temperatures;

τ luminous transmittance in the darkened state as reached at 35 °C after specified

irradiation simulating outdoor conditions at high temperatures;
luminous transmittance in the darkened state as reached at 23 °C after specified
irradiation simulating reduced light conditions.
---------------------- Page: 6 ----------------------
EN 1836:2005 (E)
3.4
photochromic range, R

range given by the ratio of the difference of the luminous transmittance in the faded state τ and the luminous

transmittance in the darkened state τ to the luminous transmittance in the faded state τ :

τ − τ
0 1
R =
3.5
photochromic sunglare filter

filter that reversibly alters its luminous transmittance under the influence of sunlight

NOTE This alteration is not instantaneous, but is a function of a temperature and material dependent time constant.

In this way, the luminous transmittance of the filter adjusts itself within certain limits to the ambient radiant flux.

3.6
polarising sunglare filter
filter of which transmittance is dependent on the polarisation of the radiation

NOTE Polarising sunglare filters have a preferred plane of polarisation. The plane of polarisation is determined by the

transmission direction and the magnetic vector of the transmitted electromagnetic wave.

3.7
reference points

reference points of eye-protectors with afocal lenses are defined in EN 167:2001 by the points where the two

light bundles are passing through the oculars, unless the manufacturer specifies different ones (e.g. in the

case of frames for children). The boxed centre (see Figure 5) of the ocular takes the place of the reference

point if this is not known and cannot be determined by using this method
3.8
relative visual attenuation coefficient (quotient) for signal light recognition
quotient Q is defined as:
sign
Q =
where

is the luminous transmittance of the sunglare filter for CIE standard illuminant D 65. See

ISO/CIE 10526;

is the luminous transmittance of the sunglare filter for the spectral power distribution of the

sign
traffic signal light.
---------------------- Page: 7 ----------------------
EN 1836:2005 (E)
These are given by the equations:
780 nm
τ ()λ ⋅V()λ ⋅ S (λ)⋅ dλ
F D65λ
380 nm
τ =
780 nm
V()λ ⋅ S (λ)⋅ dλ
D65λ
380 nm
Error! Objects cannot be created from editing field codes.
where

is the spectral distribution of radiation of CIE standard illuminant A (or 3200 K light

S (λ)
source for blue signal light). See: ISO/CIE 10526;
is the spectral distribution of radiation of CIE standard illuminant D 65. See:
S (λ)
D65λ
ISO/CIE 10526:1991;
is the spectral luminous efficiency for daylight vision. See: ISO/CIE 10527;
V(λ)
is the spectral transmittance of the traffic signal lens;
τ (λ)
is the spectral transmittance of the sunglare filter.
τ (λ)

The spectral values of the products of the spectral distributions (S (λ), S (λ)) of the illuminants, the

Aλ D65λ

spectral luminous efficiency V(λ) of the eye and the spectral transmittance τ (λ) of the traffic signal lenses

are given in Annex B.
3.9
solar blue-light transmittance ττ

mean of the spectral transmittance between 380 nm and 500 nm weighted with the solar radiation E (λ) at

sea level for air mass 2 and the blue-light hazard function B(λ). The complete weighting function is the

product of both:
WB (λ) = E (λ) × B(λ)
λ sλ

The values of these functions are given in Annex C and may be interpolated where necessary. The definition

of τ is the following:
500nm 500nm
τ (λ)⋅ E ()λ ⋅ B()λ ⋅dλ τ ()λ ⋅WB ()λ ⋅dλ
F sλ F λ
∫ ∫
380nm 380nm
τ = =
500nm 500nm
E ()λ ⋅ B(λ)⋅dλ WB ()λ ⋅dλ
sλ λ
∫ ∫
380nm 380nm
---------------------- Page: 8 ----------------------
EN 1836:2005 (E)
3.10
solar luminous reflectance ρρρρ

ratio ρ of the luminous flux reflected by the filter to the incident flux. The basis for calculation this is the

spectral luminous efficiency V(λ). The values of the spectral luminous efficiency V(λ) are given in

ISO/CIE 10527
780nm
ρ(λ)⋅ S (λ)⋅V (λ)⋅dλ
D65λ
380nm
ρ =
780nm
S (λ)⋅V (λ)⋅dλ
D65λ
380nm
where
ρ(λ) is the spectral reflectance of the filter at wavelength λ..
3.11
solar infrared transmittance ττττ
SIR

transmittance τ obtained by integration between the limits 780 nm and 2 000 nm based on the solar

SIR

spectral distribution of radiation E (λ) at sea level for air mass 2. The values of E (λ) are given in Annex D

sλ sλ
2000 nm
τ ()λ ⋅ E (λ)⋅dλ
F sλ
780 nm
τ =
SIR
2000 nm
E ()λ ⋅dλ
780 nm
3.12
solar UV-transmittance ττττ
SUV

mean of the spectral transmittance between 280 nm and 380 nm weighted with the solar radiation E (λ) at

sea level for air mass 2 and the relative spectral effectiveness function for UV radiation S(λ). The complete

weighting function is the product of both : W(λ) = E (λ) × S(λ) . The weighting functions are given in Annex C.

The definition of τ is the following:
SUV
380 nm 380 nm
τ ()λ ⋅ E (λ)⋅ S()λ ⋅ dλ τ ()λ ⋅W (λ)⋅dλ
F sλ F λ
∫ ∫
280 nm 280 nm
τ = =
SUV
380 nm 380 nm
E ()λ ⋅ S(λ)⋅ dλ W ()λ ⋅ dλ
sλ λ
∫ ∫
280 nm 280 nm
3.13
solar UVA-transmittance ττ
SUVA

mean of the spectral transmittance between 315 nm and 380 nm weighted with the solar radiation E (λ) at

sea level for air mass 2 and the relative spectral effectiveness function for UV radiation S(λ). The complete

weighting function is the product of both: W(λ) = E (λ) × S(λ) The weighting functions are given in Annex C.

The definition of τ is as follows:
SUVA
380nm 380nm
τ ()λ ⋅ E (λ)⋅ S()λ ⋅dλ τ ()λ ⋅W (λ)⋅dλ
F sλ F λ
∫ ∫
315nm 315nm
τ = =
SUVA
380nm 380nm
() ( ) ()
E λ ⋅ S λ ⋅dλ W λ ⋅dλ
sλ λ
∫ ∫
315nm 315nm
---------------------- Page: 9 ----------------------
EN 1836:2005 (E)
3.14
solar UVB-transmittance ττττ
SUVB

mean of the spectral transmittance between 280 nm and 315 nm weighted with the solar radiation E (λ) at

sea level for air mass 2 and the relative spectral effectiveness function for UV radiation S(λ). The complete

weighting function is the product of both: W(λ) = E (λ) × S(λ) . The weighting functions are given in Annex C.

The definition of τ is as follows:
SUVB
315nm 315nm
τ ()λ ⋅ E ()λ ⋅ S(λ)⋅dλ τ ()λ ⋅W ()λ ⋅dλ
F sλ F λ
∫ ∫
280nm 280nm
τ = =
SUVB 315nm 315nm
E ()λ ⋅ S(λ)⋅dλ W ()λ ⋅dλ
sλ λ
∫ ∫
280nm 280nm
4 Filter requirements
4.1 Transmittance
4.1.1 General
For the determination of the transmittance values see 6.2.
4.1.2 Transmittance and filter categories

Sunglare filters for general use shall be attributed to five filter categories, where category 0 applies only to

photochromic filters in the faded state, to gradient filters with a luminous transmittance > 80 % at the reference

point, and to filters that have a luminous transmittance > 80 %, but where a specific protection against any

part of the solar spectrum is claimed. The range of the luminous transmittance of these five categories is given

by the values in Table 1. An overlap of the transmittance values shall be not more than ± 2 % (absolute)

between the categories 0, 1, 2 and 3 except for gradient lenses, where the double value is permitted for the

above specified categories.

If the supplier declares a luminous transmittance value, the limit deviation for this value shall be ± 3 %

absolute for the transmittance values falling in categories 0 to 3 and ± 30 % relative to the stated value for the

transmittance values falling in category 4.

When describing the transmittance properties of photochromic filters, two categories for transmittance values

are generally used. These two values correspond to the faded state and to the darkened state of the filter.

In the case of gradient filters the transmittance value at the reference point shall be used to characterise the

luminous transmittance and the category of the filter.
Table 1 specifies also the UV requirements for sunglare filters for general use.

Sunglare filters for which enhanced infrared absorption is claimed, shall meet the requirements of the last

column of Table 1.
---------------------- Page: 10 ----------------------
EN 1836:2005 (E)
Table 1 — Transmittance for sunglare filters for general use
Filter Requirements
category
Ultraviolet spectral range Visible spectral range Enhanced
infrared
absorption
Maximum value of Maximum Range of luminous Maximum value
spectral value of solar transmittance of solar infrared
transmittance UVA transmittance
transmittance
τ (λ) τ
F SUVA
τ τ
v SIR
280 nm over 315 nm from to
315 nm over
to 315 nm to 380 nm
to 350 nm % %
0 80,0 100
1 43,0 80,0
τ τ τ
v v
0,1 × τ
2 18,0 43,0
3 8,00 18,0
0,5 × τ 0,5 × τ
v v
4 3,00 8,00

Only applicable to sunglare filters recommended by the manufacturer as a protection against infrared radiation.

4.1.3 General transmittance requirements
4.1.3.1 Uniformity of luminous transmittance

Apart from a marginal zone 5 mm wide, the relative difference in the luminous transmittance value between

any two points of the filter within a circle 40 mm in diameter around the reference point, or to the edge of the

filter less the marginal zone 5 mm wide, whichever is greater, shall not be greater than 10 % (relative to the

higher value), except for category 4 where it shall not be greater than 20 %.
The boxed centre takes the place of the reference point if this is not known.

In the case of gradient filters, this requirement applies in a section perpendicular to the gradient.

In the case of mounted gradient filters, this requirement applies in a section parallel to the connection line of

the two reference points.

For mounted filters the relative difference between the luminous transmittance value of the filters at the visual

centre for the right and left eye shall not exceed 20 % (relative to the lighter filter).

Changes of luminous transmittance that are caused by thickness variations due to the design of the lens are

permitted.
4.1.3.2 Requirements for road use and driving
4.1.3.2.1 General

Filters suitable for road use and driving shall be of categories 0, 1, 2 or 3 and shall additionally meet the

following two requirements.
---------------------- Page: 11 ----------------------
EN 1836:2005 (E)
4.1.3.2.2 Spectral transmittance

For wavelengths between 500 nm and 650 nm the spectral transmittance of filters suitable for road use and

driving shall be not less than 0,2 × τ .
4.1.3.2.3 Recognition of signal lights

The relative visual attenuation coefficient (quotient) Q of filters of categories 0, 1, 2 and 3 suitable for driving

and road use shall be not less than 0,80 for red and yellow signal lights, not less than 0,40 for the blue signal

light and not less than 0,60 for the green signal light.
4.1.4 Special transmittance requirements
4.1.4.1 Photochromic filters

The category of a photochromic filter shall be determined by its luminous transmittance in its faded state τ

and its luminous transmittance in its darkened state τ achieved after 15 min irradiation according to 6.2.3.1.

In both states, the requirements specified in 4.1.2 and 4.1.3 shall be met.
For photochromic filters shall be ≥ 1,25.
4.1.4.2 Polarising filters

Where sunglasses are fitted with polarising filters, these shall be fitted in the frame so that the plane of

polarisation does not deviate from the horizontal direction by more than ± 5°. The misalignment between the

plane of polarisation of the left and right filters shall not be greater than 6°.

The plane of polarisation of uncut polarising sunglare filter shall be marked.

For polarising filters, the ratio of the luminous transmittance values parallel and perpendicular to the plane of

polarisation shall be greater than 8:1 for filter categories 2, 3, 4 and greater than 4:1 for category 1.

4.1.4.3 Gradient filters

Gradient Filters shall meet the transmittance requirements within a 10 mm radius circle, around the reference

point.

The filter category of gradient filters shall be determined by the luminous transmittance value at the reference

point. The filter category determined at the reference point shall be used to define if the filters are suitable for

road use and driving, according to 4.1.3.2.
---------------------- Page: 12 ----------------------
EN 1836:2005 (E)
4.1.4.4 Filters and eye protectors for the direct observation of the sun

The transmittance requirements and filter categories of filters for the direct observation of the sun are given in

Table 2.

Table 2 — Transmittance requirements for filters for the direct observation of the sun

Requirements
Ultraviolet spectral range Visible spectral range Infrared spectral
range
280 nm to 315 nm to Range of luminous
315 nm 380 nm transmittance τ
Filter v
Maximum value
category
of solar infrared
Maximum value Maximum value from to
transmittance
of spectral of solar UVA under
τ
transmittance τ transmittance τ SIR
τ (λ ) τ
F SUVA
% % %
E12 0,003 2 0,001 2
E13 0,001 2 0,000 44
E14 0,000 τ τ 44 0,000 16 3
v v
E15 0,000 16 0,000 061
E16 0,000 061 0,000 023

In addition to the filter requirements of Table 2, only the following paragraphs of this European Standard apply

to filters for the direct observation of the sun: 4.1.3.1, 4.2, 4.3, 4.4, 4.6 and 4.7. Frames shall comply with the

requirements of 5.3 and 5.4.
NOTE The frame should hold the filters securely in front of the eyes.
4.1.5 Claimed transmittance and reflectance properties
4.1.5.1 General

In the case where specific transmittance or reflectance values are claimed, these claims shall be in

accordance with 4.1.5.2, 4.1.5.3, and 4.1.5.4.
4.1.5.2 Blue-light-absorption/transmittance
4.1.5.2.1 Blue-light-absorption

In the case where it is claimed that a filter has x % blue-light-absorption, the solar-blue-light-transmittance τ

of the filter shall not exceed (100,5 - x) %.
4.1.5.2.2 Blue-light-transmittance

In the case where it is claimed that a filter has less than x % blue-light-transmittance, the solar blue-light-

transmittance τ of the filter shall not exceed (x + 0,5) %.

For the calculation of the blue-light-transmittance the values of Annex C shall be used.

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EN 1836:2005 (E)
4.1.5.3 Absorption and transmittance in the UV spectral range

Requirements for the transmittance of filters for sunglasses in UVA and UVB shall be as given in Table 1. In

cases where it is claimed that a product reaches a certain percentage of UV-absorption or UV-transmittance,

the corresponding requirements shall apply.
4.1.5.3.1 UV-absorption

In cases where it is claimed that a filter has x % UV-absorption, the solar UV-transmittance of the filter τ

SUV
shall not exceed (100,5 - x) %.
4.1.5.3.2 UV-transmittance

In the case where it is claimed that a filter has less than x % UV-transmittance, the solar UV-transmittance of

the filter τ shall not exceed (x + 0,5) %.
SUV
4.1.5.3.3 UVA-absorption

In the case where it is claimed that a filter has x % UVA-absorption, the solar UVA-transmittance of the filter

τ shall not exceed (100,5 - x) %.
SUVA
4.1.5.3.4 UVA-transmittance

In the case where it is claimed that a filter has less than x % UVA-transmittance, the solar UVA-transmittance

of the filter τ shall not exceed (x + 0,5) %.
SUVA
4.1.5.3.5 UVB-absorption

In the case where it is claimed that a filter has x % UVB-absorption, the solar UVB-transmittance of the filter

τ shall not exceed (100,5 - x) %.
SUVB
4.1.5.3.6 UV
...

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