Laser safety products often protect against more than one wavelength range, and sometimes these ranges overlap. For example, our 125 filter is marked with an OD 7+ at 190-385nm and an OD 5+ at 855-1085nm, offering protection at different levels within these ranges.

Additionally, within the 855-1085nm range, the glasses provide an OD 8+ at 980nm and an OD 6+ at 1064nm. Each range or wavelength is marked with the minimum optical density (OD) at that wavelength or over that range.

For more detailed information on how to read optical density notation, click here.