Bsi bs en 01836 1997 (2003)

BRITISH STANDARD BS EN 1836 1997 Incorporating Amendments Nos 1 and 2 Personal eye protection — Sunglasses, sunglare filters for general use and filters for direct observation of the sun The European[.]

Personal eye

protection —

Sunglasses, sunglare

filters for general use

and filters for direct

observation of the sun

The European Standard EN 1836:1997, including amendments A1:2001

and A2:2003, has the status of British Standard

ICS 13.340.20

This British Standard, having

been prepared under the

direction of the Sector Board,

was published under the

authority of the Standards

Board and comes into effect on

15 July 1997

© BSI 16 December 2003

The following BSI references

relate to the work on this

standard:

Committee reference PH/2/1

The preparation of this British Standard was entrusted to Technical Committee PH/2, Eye protection, to Subcommittee PH/2/1, Sunglasses, upon which the following bodies were represented:

Association of Consulting ScientistsBritish Retail Consortium

British Safety Industry FederationCollege of Optometrists

Consumer Policy Committee of BSIDepartment of Health

Electricity AssociationFederation of Manufacturing OpticiansFlat Glass Manufacturers’ AssociationHealth and Safety Executive

Institution of Mechanical EngineersManufacturing Science FinanceMinistry of Defence

National Physical LaboratoryRoyal College of OphthalmologistsSafety Equipment Association

Amendments issued since publication

English language version of EN 1836:1997, including amendments A1:2001

and A2:2003, Personal eye protection — Sunglasses and sunglare filters for

general use, published by the European Committee for Standardization (CEN)

It supersedes BS 2724:1987, which is withdrawn

The start and finish of text introduced or altered by amendment is indicated in the text by tags !" Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

Cross-references

The British Standards which implement international or European publications

referred to in this document may be found in the BSI Catalogue under the section

entitled “International Standards Correspondence Index”, or by using the

“Search” facility of the BSI Electronic Catalogue or of British Standards Online.

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 30, an inside back cover and a back cover

The BSI copyright notice displayed in this document indicates when the

November 2003ICS 13.340.20

Descriptors: Personal protective equipment, accident prevention, eyes, radiation protection, solar radiation, eye glasses, filters, definitions, specifications, physical properties, mechanical properties, optical properties, transmittance, tests, information

English version

Personal eye protection — Sunglasses, sunglare filters for general use and filters for direct observation of the sun

(includes amendments A1:2001 and A2:2003)

Protection individuelle de l’oeil —

Lunettes solaires, filtres de protection contre les

rayonnements solaires pour usage général et

filtres pour l’observation directe du soleil

(inclut les amendements A1:2001 et A2:2003)

Persönlicher Augenschutz — Sonnenbrillen Sonnenschutzfilter für den allgemeinen Gebrauch und Filt für die direkte Betrachtung der Sonne

(enthält Änderungen A1:2001 und A2:2003)

This European Standard was approved by CEN on 1996-12-19 Amendment A1was approved by CEN on 2001-07-27; amendment A2 was approved by CEN

on 2003-09-01 CEN members are bound to comply with the CEN/CENELECInternal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration

Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to anyCEN member

This European Standard exists in three official versions (English, French,German) A version in any other language made by translation under theresponsibility of a CEN member into its own language and notified to theCentral Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland,Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia,Spain, Sweden, Switzerland and United Kingdom

CEN

European Committee for StandardizationComité Européen de NormalisationEuropäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

This European Standard 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

July 1997, and conflicting national standards shall

be withdrawn at the latest by July 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(s)

For relationship with EU Directive(s), see

informative Annex ZA, which is an integral part of

this standard

Annex A is informative Annex B, Annex C and

Annex D are normative

According to the CEN/CENELEC Internal

Regulations, the national standards organizations

of the following countries are bound to implement

this European Standard: Austria, Belgium,

Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Netherlands,

Norway, Portugal, Spain, Sweden, Switzerland and

the United Kingdom

Foreword to amendment A1

This amendment EN 1836:1997/A1:2001 to the

EN 1836:1997 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

February 2002, and conflicting national standards

shall be withdrawn at the latest by February 2002

This amendment to the European Standard

EN 1836:1997 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)

According to the CEN/CENELEC Internal

Regulations, the national standards organizations

of the following countries are bound to implement

this European Standard: Austria, Belgium, Czech

Republic, Denmark, Finland, France, Germany,

Greece, Iceland, Ireland, Italy, Luxembourg,

Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland and the United Kingdom

Foreword to amendment A2

This document (EN 1836:1997/A2:2003) has been prepared by Technical Committee CEN/TC 85, Eye-protective equipment, the Secretariat of which

is held by AFNOR

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)

This amendment to the European Standard

EN 1836:1997 shall be given the status of a national standard, either by publication of an identical text

or by endorsement, at the latest by May 2004 and conflicting national standards shall be withdrawn

at the latest by May 2004

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

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

of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom

Annex A (informative) Use of sunglare

Annex B (normative) Spectral functionsfor the calculation of luminous transmittance

Annex C (normative) Spectral functionsfor the calculation of solar UV transmittance

Annex D (normative) Spectral function

Annex ZA (informative) Clauses of this

Page

Figure 1 — Spectral transmittance of

the combination of the heat absorbing

filter and the cut-off filter for the

Figure 2 — Apparatus for the

Figure 3 — Illustration of bridge

Figure 4 — Determination of the lens

Figure 5 — Symbol “not suitable for

Table 1 — Transmittance for sunglare

Table 2 — Transmittance requirements for

Table 3 — Optical power values of

Table 4 — Optical power values of

nominally afocal filters mounted in

Table 5 — Relative uncertainty permissible

for transmittance measurements at a

Table 6 — Irradiance for testing the darkened

Table 7 — Measurement conditions

for the different luminous transmittance

Table A.1 — Filter categories and

Table B.1 — Product of the spectral

distribution of radiation of the signal

lights and standard illuminant D 65

as specified in ISO/CIE 10526:1991

and the spectral visibility function of

the average human eye for daylight

Table C.1 — Spectral functions for the

calculation of solar UV-transmittance

Table D.1 — Spectral distribution of solar

irradiance in the infrared spectrum for the

calculation of the solar infrared

Table ZA.1 — Relationship between

1 Scope

This 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 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 (informative) Annex A For sunglasses and sunglare filters for industrial use, EN 166:1995 and EN 172:1994 apply

This standard does not apply to eyewear for protection against radiation from artificial light sources, such

as those used in solaria EN 170:1992 applies for these filters

This standard does not apply to ski goggles, for which EN 174:1996 applies, or other types of eye protection used for leisure activities

This standard does not apply to sunglasses and filters that have been medically prescribed for attenuating solar radiation

2 Normative references

This European Standard incorporates, by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply

to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to 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 170:1992, Personal eye protection — Ultraviolet filters — Transmittance requirements and

recommended use.

EN 172:1994, Personal eye protection — Sunglare filters for industrial use.

#EN 174:2001$, Personal eye protection — Ski goggles for downhill skiing

#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.$

IEC 50(845):1987, International Electrotechnical vocabulary — Chapter 845: Lighting.

CIE 85:1989, Solar spectral irradiance.

#ISO 8624:2002$, Optics and optical instruments — Ophthalmic optics — Measuring system for

spectacle frames.

ISO/CIE 10526:1991, CIE standard colorimetric illuminants.

ISO/CIE 10527:1991, CIE standard colorimetric observers.

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.

luminous transmittance of photochromic sunglare filters

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

3.4

photochromic range, Rp

Rp =

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

polarizing sunglare filter

filter of which transmittance is dependent on the polarization of the radiation

NOTE Polarizing sunglare filters have a preferred plane of polarization The plane of polarization is determined by the transmission direction and the magnetic vector of the transmitted electromagnetic wave.

3.7

reference points

the reference points of eye-protectors with a focal lenses are defined in Figure 2 of EN 167:1995 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 geometric centre of the ocular takes the place of the reference point if this is not known and cannot be determined by using this method$

polarised radiation;

polarised radiation

simulating mean outdoor conditions;

simulating outdoor conditions at low temperatures;

simulating outdoor conditions at high temperatures;

simulating reduced light conditions

#3.8

relative visual attenuation quotient for signal light recognition

this quotient Q is defined as:

these are given by the equations:

are given in Annex B$

where

See ISO/CIE 10526:1991;

traffic signal light

where

for blue signal light); See: ISO/CIE 10526:1991

See: ISO/CIE 10526:1991

V (2) is the spectral luminous efficiency for daylight vision; See: ISO/CIE 10527:1991

#3.9

solar blue-light transmittance Esb

the mean of the spectral transmittance between 380 nm and 500 nm weighted with the solar radiation

the complete weighting function is the product of both:

3.10

solar infrared transmittance E sir

3.11

solar luminous reflectance Ôv

calculation this is the spectral luminous efficiency V(2) The values of the spectral luminous efficiency V(2)

are given in ISO/CIE 10527:1991:

#3.12

solar UV-transmittance Esuv

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

the weighting functions are given in Annex C

3.13

solar UVA-transmittance ESUVA

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

the complete weighting function is the product of both: W(2) = Es2(2)·S(2)

the weighting functions are given in Annex C

$

#3.14

solar UVB-transmittance ESUVB

the solar UVB-transmittance is the mean of the spectral transmittance between 280 nm and 315 nm

function for UV radiation S(2)

the weighting functions are given in Annex C

$

4 Filter requirements

4.1 Transmittance

For the determination of the transmittance values see 6.1.

4.1.1 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

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 characterize 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

4.1.2 General transmittance requirements

4.1.2.1 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 geometric 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

4.1.2.2 Requirements for road use and driving

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

4.1.2.2.1 Spectral transmittance

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

4.1.2.2.2 Recognition of signal lights

The relative visual attenuation 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

Table 1 — Transmittance for sunglare filters for general use

4.1.3 Special transmittance requirements

4.1.3.1 Photochromic filters

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

to 6.1.3.1 In both states, the requirements specified in 4.1.1 and 4.1.2 shall be met.

Ultraviolet spectral range Visible spectral range Enhanced infrared

absorptiona

Maximum value of spectral transmittance value of solar Maximum

UVA transmittance

Range of luminous transmittance

Maximum value of solar infrared transmittance

4.1.3.2 Polarizing filters

Where sunglasses are fitted with polarizing filters, these shall be fitted in the frame so that the plane of polarization does not deviate from the horizontal direction by more than ±5° The misalignment between the plane of polarization of the left and right filters shall not be greater than 6°

The plane of polarization of uncut polarizing sunglare filter shall be marked

For polarizing filters, the ratio of the luminous transmittance values parallel and perpendicular to the plane of polarization shall be greater than 8:1 for filter categories 2, 3, 4 and greater than 4:1 for

are suitable for road use and driving, according to 4.1.2.2.$

#4.1.3.4 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

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

filters for the direct observation of the sun: 4.1.2.1, 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.$

4.1.4 #Claimed transmittance and reflectance properties$

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

with 4.1.4.1 and 4.1.4.2.

4.1.4.1 Blue-light-absorption/transmittance

Blue-light-absorption

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

Blue-light-transmittance

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

Ultraviolet spectral range Visible spectral range Infrared spectral

range

280 nm to 315 nm 315 nm to 380 nm Range of luminous transmittance EV Maximum value of

solar infrared transmittance Maximum value

of spectral transmittance E

Maximum value of solar UVA transmittance E

4.1.4.2 UV-absorption/transmittance

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

UV-absorption

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

UV-transmittance

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

UVA-absorption

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

UVA-transmittance

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

UVB-absorption

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

UVB-transmittance

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

#4.1.4.3 Anti-reflection treated sunglasses

the filter as measured from the eye-side of the filter shall be less than 2.5 %.$

4.2 Optical power of oculars

4.2.1 Unmounted oculars covering one eye

The permissible optical power values are given in Table 3 The values of columns 2 and 3 shall be adhered

to for any position of the measuring field midpoint within a 10 mm radius circle around the reference point The values in column 4 are only to be adhered to at the reference point

Testing is carried out in accordance with 6.2.

4.2.2 Oculars mounted in spectacles and unmounted filters covering both eyes

The maximum optical power values shall be as given in Table 4 The values in columns 2 and 3 shall be adhered to for each position of the measuring field midpoint within a 10 mm radius circle around the visual centres The values in columns 4, 5 and 6 shall be adhered to at the visual centres

Testing is carried out in accordance with 6.2.

4.3 Scattered light

When tested as described in Clause 4 of EN 167:1995 at the reference point, the reduced luminous

coefficient of the filters in the new state, i.e at the time of placing on the market, shall not exceed the value

4.4 Material and surface quality

When viewed with the naked eye – without magnification, with corrective lenses if necessary – from a distance of 30 cm in front of a bright/dark boundary, except in a marginal area 5 mm wide, sunglare filters shall have no material or machining defects within an area of 30 mm diameter around the reference point that may impair vision, e.g., bubbles, scratches, inclusions, dull spots, pitting, mould marks, notches, reinforced points, specks, beads, water specks, pocking, gas inclusions, splintering, cracks, polishing

defects or undulations Single defects outside this area are permissible (see 6.4).

# Table 3 — $ Optical power values of unmounted, nominally afocal filters

# Table 4 — $ Optical power values of nominally afocal filters mounted in spectacles

b) Ocular deformation: An ocular is considered to have been deformed if a mark appears on the white paper on the opposite side to that struck by the ball

4.5.2 Oculars with enhanced robustness (optional specification)

When tested as described in 6.5.2, sunglare filters shall not fracture If this requirement is met, tests according to 6.5.1 are not necessary.

4.5.3 Further claims (optional specification)

In the case that higher levels of impact resistance are claimed, sunglare filters shall meet the relevant requirements of EN 166:1995

4.6 Resistance to radiation

Following irradiation as specified in 6.6, the relative change in the luminous transmittance shall be less

than ±5 % for filters of category 0, less than ±10 % for filters of category 1 and less than ±20 % for filters of all other categories

After irradiation:

4.7 Ignition

When tested as described in 6.7, sunglare filters shall not ignite or continue to glow after removal of the

steel rod

Optical class Spherical power Astigmatic power Prismatic power

Mean value of the optical power values in the two principal meridians

Absolute difference of the optical power values in the two principal meridians

(D1 + D2 )/2 I D1 – D2 I

Optical class Spherical power Astigmatic power Prismatic power difference

Mean value of the optical power values in the two principal meridians

Absolute difference of the optical power values in the two principal meridians