There are many different things to consider when selecting laser safety goggles for your particular laser system. Firstly the wavelength needs to be known. This is usually specified in nm or nanometers or um micrometers such as with CO2 lasers. The next is the optical density required. An OD 1 is 10 times reduction in power and an OD 7 is 10 million times reductin. Then the VLT which is the visible light transmission of the goggles. If this is less than 25% then they are recommended to be used in an area that is well lit. Lastly the L ratings which determine how long the laser glasses can withstand a direct hit from the lasers before they burn through.
Wavelengths, Optical Densities & Specifications - Marked on Glasses
- 1064nm - OD 7+
- 750-1064nm - OD 7+
- 720-1090nm OD 5+
- 190-400nm OD 5+
- Visible Light Transmission 25%
CE-EN207 L-Rating
180-315 D LB6 + R LB4
>315-400 DR LB4
720-725 DM LB5
720-750 + >1064-1075 IR LB5
>725-1075 DM LB6
>750-1064 IRM LB7
More information on selecting laser safety glasses can be found on our free guide in the below link.
If you have any questions feel free to contact us and one of our laser safety experts will be happy to help.
Five things to consider when picking laser safety glasses (certified-laser-eyewear.com)