Laser Safety Eyewear - Alignment Filters

Alignment Filters

R-rated filters for the safe viewing of visible laser beam spots

Further Information
» LASERVISION Filters Catalogue (20e)	» LASERVISION 2009 Supplement

LASERVISION's alignment filters provide partial blocking of low power, visible wavelength laser beams. This means that the wearer can safely view the visible beam spot for laser beam alignment. Alignment filters are assigned an R rating in accordance with BS EN 208. The principle of alignment protection filters is that they attenuate the power of the laser such that if the beam were to accidentially hit the filter directly, the only light that would be transmitted would be equivalent to a class 2 exposure. Class 2 lasers are those low power, visible devices for which the eye's blink reflex affords sufficient protection. Please note that alignment filters are not intended for direct viewing of the laser beam, rather for diffuse, indirect viewing (i.e. reflections from a scattering surface).

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Alignment Filters	Main Laser Types	Protection
P04	HeNe, Visible Laser Diode	620-644nm, R2
P07	Argon	500-520nm, R1
P08	670nm Diode	670nm, R1
P1002	Visible Diode	650-680nm, R1
P1004	HeNe Visible Laser Diode	625-650nm, R1 660-675nm, R2
P1005	Visible lasers	520-700nm, R1
P2005	CW Nd:YAG (2H)	532nm, R1
Type 48	HeNe	633nm, R2
Type 58	HeNe	633nm, R3
Type 68	HeNe Visible Laser Diode	633nm, R1 670nm, R3
Type 81	HeNe Visible Laser Diode	630-690nm, R1
Type 82	HeNe Visible Laser Diode	630-690nm, R2