Class 4 lasers are the most powerful class of lasers and therefore it is essential to use laser safety glasses with a high level of protection. Usually Optical densities of the order or 5 , 6 or 7 are used.

L ratings are also important for use with Class 4 lasers as these determine the suitability of the laser glasses to withstand a dirtect hit from the lasers.

An example of laser safety glasses for use with a class 4 laser are hsown below.

LG-001 YAG 1064 nm OD 7 Fitover Laser Safety Goggles (certified-laser-eyewear.com)

Optical density specifications are written as below:

1064nm - OD 7+

950-1070nm - OD 7+

1080-1090nm - OD 5+

840-950nm - OD 5+

808-840nm - OD 4+

190-400nm - OD 5+

L-Rating Specifications are:

808-840 DIRM LB4
>840-950 + >1070-1090 DIRM LB5
>950-1070 D L6 + IRM LB7

If you have any questions abour which laser safety glasses are most suited for your Class 4 laser feel free to contact us at info@dioptika.com and one of our laser safety experts will be happy to help.