When selecting the most appropriate safety glasses to protect against laser light there are many things to consider. The first is the wavelength of the laser which is in nm or nanometers.  It is usually expressed as something like 755nm or 1064nm.  Then appropriate OD is required. The OD or Optical Density determines how much the laser eyewear will cut the laser of a given wavelength down by. For example an Optical Density of 7+ at 1064 nm provides 10 million times reduction of the laser light at 1064nm, an OD 3 at 755nm cuts wthis wavelength down by 1000 times.

The next paparemeter to consider is the L ratings.  These are required to be printed on the glasses to be compliant with Australian laser safety standards and EN207.  They are expressed like LB4 or LB7 and determine how long the laser eyewear can withstand a hit from the glasses before burning through.  It also takes into account the frame as well as the lenses.

Lastly they are required to have the VLT or Visible Light Transmission displayed on the glasses which determines how light or dark they are to look through.

More information on selecting laser protective eyewear for use in Australia can be found via the below link. Alternatively feel free to contact us on 1300 411 337 or email us at info@dioptika.com and one of our laser safety experts will be happy to help.