BS EN-207:2009 pdf download
BS EN-207:2009 pdf download.Personal eye- protection equipment—Filters and eye-protectors against laser radiation (lasereye-protectors).
For pulsed lasers, testing shall be done with low repetition rates (S 25 Hz). If it is riot possible, the energy density used for testing shall be given and the product shall be marked in accordance with 6.1, d).
All laser protective filters and frames shall be tested In accordance with the test condition D. If commercially available. testing at mode D shall be done with a real CW laser. If It Is not feasible, testing shall be done with a pulsed laser system at a minimum pulse repetition frequency ‘ of 25 Hz If no laser with pulse repetition rates higher than 25 Hz is available, a pulsed laser system at a minimum pulse repetition frequency of v 5 Hz shall be used to test condition D.
II additional protection against pulsed lasers Is required, the filters and laser radiation eye-protectors shalt be tested according to one or several of the test conditions I, R or M.
Lasers which do not show spiking at the beginning of the emission shall be used. The spatial and temporal beam profile shall be documented, except for temporal profiles of M mode lasers.
4.5 Refractive value of filters and eye-protectors
The test shall be carried out in accordance with Clause 3 of EN 167:2001.
4.6 Quality of material and surface of filters
4.6.1 Material and surface defects
The test shall be carried out in accordance with Clause 5 of EN 167:2001.
NOTE Thin film filters should be carefully examined for defects (scratches and holes) as damage of deposited layer can affect protection agaWls* laser radiahon
4.6.2 Diffusion of light
The test shall be carried out in accordance with Clause 4 of EN 167:2001.
if the simplified method cannot be used because the spectral transmittance is too low, the basic method shall be used.
4.7 Stability to UV radiation and stability to elevated temperature
4.7.1 Stability to UV radiation
The test shall be carried out in accordance with Clause 6 01 N with the lamp rurin.ng at a power of 450W and an exposure twne of (50 ±0,2) h.
4.7.2 StabilIty to elevated temperature
Fillers and eye-protectors shall be stored for at least 7 h m a climatic cabinet at a temperature of (55 ± 2) C and a relative humidity of> 60 %, and then stored for at least 2 h at room temperature.
4.8 Resistance of filters and frames to ignition by contact with hot surfaces The test shall be carried out in accordance with Clause 7 of EN 168:2001.
4.11 Frames
4.11.1 It shall be tested by means of manual and visual Inspection whether the filters are interchangeable.
4.11.2 The test shall be carried out using the method given in 4.9. The zero values of the angles a and
fi are readied when the axis A, B and C of the test apparatus are perpendicular to each other
4.12 Mechanical strength
The test shall be camed out in accordance with Clause 4 of EN 168:2001,
5 Information supplied by the manufacturer
The information shall be in the language(s) of the country In wt,ch the eye-protector Is sold.
In addition to the requirements of EN 166:2001. Clause 10. the selection criteria and instructions for use shall contain at least the following:
a) luminous transmittance;
b) if the luminous transmittance is less than 20 %, this shall be indicated and the user shall be recommended to increase the intensity of illumination at the workplace;
C) in the case of tinted and coloured filters a warning to the user that the recognition of warning lights or warning signals can be Impaired;
d) the information that eye-protectors are only intended to ve protection against accidental radiation and that both the limit values and the resistance tests ere based on a maximum period of 5 s;
e) a warning that eye-protectors and filters against laser radiation which have been damaged, have saatched oailars or which have undergone a colour change shall not be used any more;
I) an explanation of the symbols used in the marking;
g) details regarding an appropriate cleanmg method;
h) in case of filters with angle dependent transmittance an information shall be given that the protection is only provided for angles of incidence up to 30.
Instructions shall include a warning of risk of exposure to laser radiation due to reflection from reflective parts (including eye.protectors), tilting or misalignment of optical components
Instructions shall include a recommendation that in areas where there is a risk of exposure to laser radiation approprtate eye-protection should be worn by all personnel.
In addition, the manufacturers shall supply additional data In the form of transmission curves.
