NEN EN 171 : 2002
Current
The latest, up-to-date edition.
PERSONAL EYE-PROTECTION - INFRARED FILTERS - TRANSMITTANCE REQUIREMENTS AND RECOMMENDED USE
12-01-2013
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Designation and identification
5 Requirements
5.1 General
5.2 Transmittance requirements
5.3 Oculars with enhanced colour recognition (optional)
5.4 Oculars with enhanced reflectance in the infrared (optional)
Annex A (normative) Relative visual attenuation quotient for
signal light recognition
A.1 Definition of relative visual attenuation quotient for
signal light recognition
A.2 Spectral functions for the calculation of luminous
transmittance and relative visual attenuation quotients
Annex B (informative) Guidance on selection and use
B.1 General
B.2 Filters with enhanced colour recognition
8.3 Filters with enhanced reflectance in the infrared
Annex C (informative) Uncertainty of measurement and results
interpretation
C.1 Test report and uncertainty of measurement
Annex ZA (informative) Clauses of this European Standard addressing
essential requirements or other provisions of EU Directives
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