SRPS EN 171: 2008 Personal eye-protection - Infrared filters - Transmittance requirements and recommended use (EN 171: 2002)

This European Standard was approved by CEN on 20 January 2002. Supersedes EN 171:1992. The European Standard EN 171:2002 has status of the Standard of Republic Serbia. 22 p. This European Standard specifies the scale numbers and transmittance requirements for filters for protection against infrared radiation.
The other applicable requirements for these types of filters and the frames/mountings to which they are intended to be fitted are given in EN 166.