Holmium lasers used in urology produce a wavelength of 2100 nm. To protect against 2100 nm Holmium lasers there are two main types of filter lenses. Mineral filter glass lenses which provide the highest visibility and the polycarbonate lens which have lower visibility but are lighter weight.

More information on the various Holmium laser safety glasses we offer can be found via the bellow link.  If you have any questions 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.

http://www.lasersafetyglasses.com.au/holmium-laser...

Specifications for the filter glass lenses and polycarbonate lenses are shown below.

Filter Glass

Wavelength & Optical Densities

1010-1500nm OD 7+

850-5200nm OD 3+

945-2300nm OD 5+

2300-2500nm OD 4+

2800-10600nm OD 5+

L-Ratings

850-900 DIR LB3

>900-950 + >1400-2200 DIR LB4

>950-1000 DIR LB5

>1000-1063 DIR LB6

>1063-1400 D LB6 + IRM LB7Y

2900-3200 + 10600 DI LB4

VLT: 75%

Polycarbonate Lens

Wavelengths & Optical Density (Marked on Glasses)

2100nm OD 5+ (Holmium Laser) - (OD at 2100nm 5.6)

10,600nm OD 6+ (CO2 Laser)

L-Ratings (Marked on Glasses)

2100 DI LB4

10,600 DI LB4