SIST EN 1938:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Persönlicher Augenschutz - Schutzbrillen für Motorrad- und MopedfahrerProtection individuelle de l'oeil - Lunettes-masques pour motocyclistes et cyclomotoristesPersonal eye protection - Goggles for motorcycle and moped users43.140Motorna kolesa in mopediMotor cycles and mopeds13.340.20Varovalna oprema za glavoHead protective equipmentICS:Ta slovenski standard je istoveten z:EN 1938:2010SIST EN 1938:2010en,fr,de01-oktober-2010SIST EN 1938:2010SLOVENSKI
STANDARDSIST EN 1938:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1938
July 2010 ICS 13.340.20 Supersedes EN 1938:1998English Version
Personal eye protection - Goggles for motorcycle and moped users
Protection individuelle de l'oeil - Lunettes-masques pour motocyclistes et cyclomotoristes
Persönlicher Augenschutz - Schutzbrillen für Motorrad-und Mopedfahrer This European Standard was approved by CEN on 19 June 2010.
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, Croatia, 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 © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1938:2010: ESIST EN 1938:2010

Photochromic sunglare oculars for use in twilight or at night . 18Annex B (normative)
Spectral functions for the calculation of luminous transmittance and relative visual attenuation coefficients (quotients) . 19Annex C (normative)
Spectral functions for the calculation of solar UV transmittance values . 21Annex D (normative)
Spectral function for the calculation of infrared transmittance . 23Annex E (normative)
Cut-on filter for UV filtering . 25Annex F (informative)
Impact resistance level
Use recommendations . 27Annex G (informative)
Uncertainty of measurement and results interpretation. 28SIST EN 1938:2010

Significant technical changes between this European Standard and the previous edition . 30Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC – Personal Protective Equipment . 32Bibliography . 34 SIST EN 1938:2010

EN 1836:2005+A1:2007 apply. 4 Requirements 4.1 General All the samples tested shall comply with the requirements of this European Standard. Goggles can be provided with different oculars. 4.2 Design and manufacture Goggles shall be free from projections, sharp edges or other defects which are likely to cause discomfort or injury during use. The verification of this requirement shall be made according to 5.11 and 5.12. 4.3 Materials Any materials (or combination of materials) may be used, provided they meet the requirements of this European Standard. SIST EN 1938:2010

Figure 1 — Definition of the field of vision 4.6.2 Lens requirements 4.6.2.1 General The lens requirements shall be as given in Table 1. The requirements apply to goggles with all the oculars declared by the manufacturer. SIST EN 1938:2010

Spherical refractive power Astigmatic refractive powerDifference in prismatic refractive power cm/m Permissible tolerances for refractive powers of mounted oculars D1D22+ D,m-1 l D1-D2 l D,m-1 Horizontal D∆ VerticalD∆ Base out Base in ± 0,12 0,12 1,00 0,25 0,25 Difference between the spherical powers of the left and right visual points Less than 0,18 D,m-1 Luminous transmittance According to 4.6.2.2 Uniformity of luminous transmittance According to 4.1.3.1 of EN 1836:2005+A1:2007 Maximum reduced luminance coefficient Single lens goggles: ≤ 1 cd/m²/lx Multiple lens goggles: ≤ 2 cd/m²/lx Quality of material and surface According to 4.4 of EN 1836:2005+A1:2007 Resistance to ultraviolet radiation After the testing according to 5.7, the maximum reduced luminance coefficient shall not exceed the values shown in this table.
4.6.2.2 Permissible transmittance and filter categories There are three transmittance categories for oculars for goggles for motorcycle and moped users. The range of the luminous transmittance for these three categories is given by the values in Table 2. An overlap of the transmittance values of not more than ±
2 % (absolute) is permitted between the categories 0,1 and 2. If the supplier declares a luminous transmittance value, the tolerance for the value is ±
3 % absolute for transmittance values. 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 is used to characterise the luminous transmittance / category of the oculars. Table 2 also specifies the mandatory UV requirements for oculars for goggles for motorcycle and moped users. Oculars for which the enhanced infrared absorption is claimed, shall meet the requirements of the last column of Table 2. SIST EN 1938:2010

Ultraviolet Spectral range Visible Spectral range Enhanced infrared absorption a Maximum value of spectral transmittance τF
(λ) Maximum value of solar UVA transmittance τSUVA (λ) Range of luminous transmittance
τ V Maximum value of solar infrared transmittance
τSIR 280 nm to 315 nm 315 nm to 350 nm 315 nm to 380 nm 0 0,1 . τV τV τV 80 % to 100 % τV 1 0,1 . τV τV τV 43 % to 80 % τV 2 0,1 . τV τV τV 18 % to 43 % τV a Only applicable to goggles recommended by the manufacturer as a protection against infrared radiation. In case of oculars with a luminous transmittance of less than 75 % the manufacturer shall include in the information to be supplied the warning: “Not suitable for night driving or twilight condition”.
4.6.2.3 Special transmittance requirements and claimed transmittance properties If the oculars have special transmittance requirements and/or the claimed transmittance properties described in 4.1.3 and 4.1.4 of EN 1836:2005+A1:2007 then the oculars shall satisfy the requirements described in each corresponding clause of EN 1836:2005+A1:2007. All oculars shall have a luminous transmittance value greater than or equal to 18 %. 4.6.2.4 Requirements for road driving 4.6.2.4.1 Recognition of signal lights
The goggles shall satisfy the requirement of the recognition of signal lights according to 4.1.3.2.3 of EN 1836:2005+A1:2007. 4.6.2.4.2 Spectral transmittance The goggles shall satisfy the requirement of the spectral transmittance according to 4.1.3.2.2 of EN 1836:2005+A1:2007. 4.7 Non optical requirements 4.7.1 General The requirements apply to goggles with all the oculars declared by the manufacturer. If the only difference between oculars is the colour, the compliance can be verified only on one type. 4.7.2 Impact resistance The requirement is satisfied if the goggles withstand the impact of a steel ball, when tested in accordance with 5.8. SIST EN 1938:2010

2 Sit and fit 4.4 +
3 Ventilation 4.5 +
4 Quality of material and surface 4.6.2 +
5 Reduced luminance coefficient 4.6.2 +1)
6 Transmittances, Uniformity of luminous transmittance 4.6.2 +1)
7 Field of vision 4.6.1
+
8 Refractive power 4.6.2
+1)
9 Difference in prismatic refractive power 4.6.2
+
10 Resistance to ultraviolet radiation 4.6.2 +1)
11 Impact resistance 4.7.2
+
12 Resistance to surface damage by fine particles 4.7.3
+2)
13 Resistance to fogging 4.8
+2) Explanation of the symbols: + Testing to be carried out on the indicated specimen
Empty field: No testing specified
1) Three oculars from the left and three oculars from the right eye
2) Two oculars from the left and two oculars from the right eye
5.2 Conditioning and test conditions Immediately before starting the test series, the test specimen shall be conditioned for at least 4 h in an atmosphere maintained at a temperature of (23 ± 5) °C and a relative humidity of (50 ± 20) %. Actual testing shall be carried out within 1 h after removal from the conditioning cabinet in an atmosphere maintained within the same temperature band. 5.3 Field of vision The size of the field of vision shall be measured with a perimeter in conjunction with the medium size head-form as defined in Clause 17 of EN 168:2001. The size of the field of vision of goggles for children shall be measured with a perimeter in conjunction with the small size head-form of EN 168:2001. The goggle shall be mounted as shown in Figure 2 so that the two axes of rotation A and B and the optical axis C intersect in the front surface of one eye at the interpupillary distance. Radiation is provided by a laser beam of (1 ± 0,5) mm diameter along axis C. SIST EN 1938:2010

Key 1 laser A, B, C
axis (see text) Figure 2 — Test assembly for the measurement of the field of vision At (250 ± 5) mm distance from the surface of the eyes of the test head a transparent screen is placed centred to the middle of the eyes. On this screen the two ellipses shown in Figure 3 are drawn. The horizontal length of the ellipses shall be of 320 mm, the vertical width of the ellipses shall be of 250 mm. The centre distance of the two ellipses shall be d' = c + (200 ± 1) mm, where c is the pupillary distance. The pupillary distance is 64 mm for the medium head-form and 54 mm for the small head-form, or it may be specified differently by the manufacturer. In this case, for a pupillary distance up to 56 mm the small head-form shall be used for the test. The horizontal axis shall be parallel to and 7 mm below the height of the line connecting the centres of the two eyes. The plane of the ellipses shall be parallel to the back flat portion of the head-form. The arrangement is rotated around axis A and the axis B so that the circumference of the ellipse is hit by the laser beam. Such a beam shall not be shielded by the frame of the goggle. The test shall be done for both eyes. SIST EN 1938:2010

Figure 3 — Test ellipses for the measurement of the field of vision 5.4 Refractive powers The refractive powers shall be measured in accordance with 3.2 of EN 167:2001. 5.5 Transmittance 5.5.1 General Test methods for the determination of transmittance shall be in accordance with Clause 6 of EN 167:2001. 5.5.2 Luminous transmittance The spectral distribution of standard illuminant D 65 according to ISO 11664-2:2007 and the standard spectral va
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