SIST EN 1836:2005+A1:2007
(Main)Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for direct observation of the sun
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.
Equipement 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
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for direct observation of the sunEquipement 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 soleilPersönlicher Augenschutz - Sonnenbrillen und Sonnenschutzfilter für den allgemeinen Gebrauch und Filter für die direkte Beobachtung der SonneTa slovenski standard je istoveten z:EN 1836:2005+A1:2007SIST EN 1836:2005+A1:2007en,fr,de13.340.20Varovalna oprema za glavoHead protective equipmentICS:SLOVENSKI
STANDARDSIST EN 1836:2005+A1:200701-november-2007
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1836:2005+A1
September 2007 ICS 13.340.20 Supersedes EN 1836:2005 English Version
Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for direct observation of the sun
Equipement 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
Persönlicher Augenschutz - Sonnenbrillen und Sonnenschutzfilter für den allgemeinen Gebrauch und Filter für die direkte Beobachtung der Sonne This European Standard was approved by CEN on 28 July 2005 and includes Amendment 1 approved by CEN on 3 August 2007 and the Corrigendum issued in 2006.
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: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1836:2005+A1:2007: E
EN 1836:2005+A1:2007 (E) 2 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
EN 1836:2005+A1:2007 (E) 3 Foreword This document (EN 1836:2005+A1:2007) 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 2008, and conflicting national standards shall be withdrawn at the latest by March 2008. This document supersedes !EN 1836:2005". This document includes Amendment 1, approved by CEN on 2007-08-03 and the Corrigendum issued in 2006. The start and finish of text introduced or altered by amendment is indicated in the text by tags !". The modifications of the related CEN Corrigendum have been implemented at the appropriate places in the text and are indicated by the tags ˜™. 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 EC Directive(s). For relationship with EC 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, 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.
EN 1836:2005+A1:2007 (E) 4 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 165:2005", 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 !EN 12472, Method for the simulation of wear and corrosion for the detection of nickel release from coated items" 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 – Chapter 845: Lighting"
EN 1836:2005+A1:2007 (E) 5 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in !EN 165:2005" 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: pminpmaxpminpmax
ττττ+−=P where τ pmax is the maximum values of luminous transmittance as determined with linearly polarised radiation; τ pmin is the minimum values of luminous transmittance as determined with linearly polarised radiation. 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 0 luminous transmittance in the faded state as reached at 23 °C after specified conditioning; τ 1 luminous transmittance in the darkened state as reached at 23 °C after specified irradiation simulating mean outdoor conditions; τ w luminous transmittance in the darkened state as reached at 5 °C after specified irradiation simulating outdoor conditions at low temperatures; τ s luminous transmittance in the darkened state as reached at 35 °C after specified irradiation simulating outdoor conditions at high temperatures; τ a luminous transmittance in the darkened state as reached at 23 °C after specified irradiation simulating reduced light conditions.
EN 1836:2005+A1:2007 (E) 6 3.4 photochromic range, Rp range given by the ratio of the difference of the luminous transmittance in the faded state τ 0and the luminous transmittance in the darkened state τ 1 to the luminous transmittance in the faded state τ 0: 010pτττ−=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: Q = vsignττ where τv is the luminous transmittance of the sunglare filter for CIE standard illuminant D 65. See ISO/CIE 10526; τsign is the luminous transmittance of the sunglare filter for the spectral power distribution of the traffic signal light.
EN 1836:2005+A1:2007 (E) 7 These are given by the equations: ()()()()()λλλλλλλττλλdd65Dnm780nm38065Dnm780nm380Fv⋅⋅⋅⋅⋅=∫∫SVSV
˜()()()()()()∫∫⋅⋅⋅⋅⋅⋅⋅=nm 780 nm 380 sSVSVλλλλτλλλλτλττλλdd)(Anm780nm380AsFsign ™
where SAλ (λ) is the spectral distribution of radiation of CIE standard illuminant A (or 3200 K light source for blue signal light). See: ISO/CIE 10526; SD65λ (λ) is the spectral distribution of radiation of CIE standard illuminant D 65. See: ISO/CIE 10526:1991; V(λ) is the spectral luminous efficiency for daylight vision. See: ISO/CIE 10527; τS(λ) is the spectral transmittance of the traffic signal lens; τF(λ) is the spectral transmittance of the sunglare filter.
The spectral values of the products of the spectral distributions (SAλ (λ), SD65λ (λ)) of the illuminants, the spectral luminous efficiency V(λ) of the eye and the spectral transmittance τS (λ) of the traffic signal lenses are given in Annex B. 3.9 solar blue-light transmittance ττττsb mean of the spectral transmittance between 380 nm and 500 nm weighted with the solar radiation Esλ(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: )()()(λλλλλBEWBs×= The values of these functions are given in Annex C and may be interpolated where necessary. The definition of τsb is the following: ()()()()()()()()∫∫∫∫⋅⋅⋅⋅⋅⋅⋅⋅500nm380nm500nm380nm500nm380nm500nm380nmλλλλλτλλλλλλλττλλλλdd=dd=FssFsbWBWBBEBE
EN 1836:2005+A1:2007 (E) 8 3.10 solar luminous reflectance ρρρρ v ratio ρv 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 ∫∫⋅⋅⋅⋅⋅=nm780nm380D65nm780nm380D65vd)()(d)()()(λλλλλλλρρλλVSVS where ρ(λ) is the spectral reflectance of the filter at wavelength λ. 3.11 solar infrared transmittance ττττSIR transmittance τSIR obtained by integration between the limits 780 nm and 2 000 nm based on the solar spectral distribution of radiation Esλ(λ) at sea level for air mass 2. The values of Esλ(λ) are given in Annex D ()()()λλλλλττλλddnm2000nm780nm2000nm780∫∫⋅⋅⋅=ssFSIREE 3.12 solar UV-transmittance ττττSUV mean of the spectral transmittance between 280 nm and 380 nm weighted with the solar radiation Esλ(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 : )()()(λλλλSEWs×=. The weighting functions are given in Annex C. The definition of τSUV is the following: ()()()()()()()()λλλλλτλλλλλλλττλλλλddddnm380nm280nm380nm280nm380nm280nm380nm280⋅⋅⋅=⋅⋅⋅⋅⋅=∫∫∫∫WWSESEFssFSUV 3.13 solar UVA-transmittance ττττSUVA mean of the spectral transmittance between 315 nm and 380 nm weighted with the solar radiation Esλ(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: )()()(λλλλSEWs×=The weighting functions are given in Annex C. The definition of τSUVA is as follows:
()()()()()()()()∫∫∫∫⋅⋅⋅=⋅⋅⋅⋅⋅=nm380nm315nm380nm315nm380nm315nm380nm315ddddλλλλλτλλλλλλλττλλλλWWSESEFssFSUVA
EN 1836:2005+A1:2007 (E) 9 3.14 solar UVB-transmittance ττττSUVB mean of the spectral transmittance between 280 nm and 315 nm weighted with the solar radiation Esλ(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: )()()(λλλλSEWs×=. The weighting functions are given in Annex C. The definition of τSUVB is as follows:
()()()()()()()()∫∫∫∫⋅⋅⋅=⋅⋅⋅⋅⋅=nm315nm280nm315nm280nm315nm280nm315nm280ddddλλλλλτλλλλλλλττλλλλWWSESEFssFSUVB 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.
EN 1836:2005+A1:2007 (E) 10 Table 1 — Transmittance for sunglare filters for general use Filter category Requirements
Ultraviolet spectral range Visible spectral rangeEnhanced infrared absorptiona
Maximum value of spectral transmittance
τF(λ) Maximum value of solarUVA transmittanceτSUVA Range of luminous transmittance
τv Maximum value of solar infrared transmittance
τSIR
280 nm to 315 nm over 315 nm to 350 nm 315 nm to 380 nm from over % to
%
0
80,0 100
1
τv τv 43,0 80,0 τv 2 0,1 × τv
18,0 43,0
3
0,5 × τv 0,5 × τv 8,00 18,0
4
3,00 8,00
a 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.
EN 1836:2005+A1:2007 (E) 11 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 × τv. 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 τ0 and its luminous transmittance in its darkened state τ1 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 10ττshall 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.
EN 1836:2005+A1:2007 (E) 12 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
315 nm to 380 nm
Range of luminous transmittance τ v Filter category Maximum value of spectral transmittance τ
τ F(λ ) Maximum value of solar UVA transmittance ττ SUVA
from under
% to
%
Maximum value of solar infrared transmittance τ SIR
% E12 0,003 2 0,001 2 E13 0,001 2 0,000 44 E14 0,000 44 0,000 16 E15 0,000 16 0,000 061 E16 τ v τ v 0,000 0610,000 023 3
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 τsb 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 τsb 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.
EN 1836:2005+A1:2007 (E) 13 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 τSUV 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 τSUV shall not exceed (x + 0,5) %. 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 SUVA shall not exceed (100,5 - x) %. 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 τSUVA shall not exceed (x + 0,5) %. 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 SUVB shall not exceed (100,5 - x) %. 4.1.5.3.6 UVB-transmittance In the case where it is claimed that a filter has less than x % UVB-transmittance, the solar UVB-transmittance of the filter τSUVB shall not exceed (x + 0,5) %. 4.1.5.4 Anti-reflection treated sunglasses In the case where sunglasses are claimed to be anti-reflection treated, the solar luminous reflectance ρ v of 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 6.3.
EN 1836:2005+A1:2007 (E) 14 Table 3 — Optical power values of unmounted, nominally plano power filters Optical class Spherical power Mean value of the optical power values in the two principal meridians (D1 + D2) / 2 m-1, dioptres a Astigmatic power Absolute difference of the optical power value
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