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BS EN 207:2017 pdf free

BS EN 207:2017 pdf free.Personal eye-protection equipment – Filters and eye-protectors against laser radiation (laser eye-protectors).
The following documents, in whole or in part, are normatively referenced In this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 166:200 1, Personal eye-protection – Specifications
EN 167:2001, Personal eye-protection – Optical test methods
EN 168:2001, Personal eye-protection Non-optical test methods
EN 60825-1:2007, Safety of laser products – Part 1: Equipment classification and requirements (IEC 6 0825-1:2007)
ISO 11664-1:2007, Colorimetiy – Part 1: C1E standard colorimetric observers ISO 11664-2:2007, Colorimetiy- Part 2: C1E standard illuminants
3 Requirements
3.1 Spectral transmittance of filters and frames
When tested according to 4.2, the maximum spectral transmittance at the wavelength(s) or in the wavelength range(s) of protection shall not exceed the values specified in Table 1 for the applicable scale number.
3.2 Luminous transmittance of filters
When assessed in accordance with 4.3, the luminous transmittance of the filter relative to the D65 standard illuminant (see ISO 11664-2:2007) shall be at least 20%. However, luminous transmittance lower than 20 % may be accepted provided that the manufacturer supplies information related to the increase of the intensity of illumination at the relevant workplace in accordance with ClauseS.
3.3 Resistance of filters and frames to laser radiation
When tested according to 4.4, the filters and frames shall meet the requirements of 3.1 and shall not lose their protective effect under the influence of laser radiation of the power (E)/ energy density (H) as specified in Table 1 and shall not show any induced transmission (reversible bleaching). No splinters shall come away from the side of the filter facing the eye under the influence of the laser radiation. Any melting or other damage of the surface during the course of irradiation is not considered negative if the protective effect is still maintained.
3.5 Quality of material and surface of filters
3.5.1 Material and surface defects
The material and surface defects of filters shall be assessed in accordance with 4.6.1.
Except for a marginal area of 5 mm wide, filters shall be free from any material or surface defects likely to impair the intended use, such as bubbles, scratches, inclusions, dull spots, mould marks, scoring or other defects originating from the manufacturing process. No holes are allowed anywhere in the filters.BS EN 207 pdf free download.

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