Laser Safety Glasses White Spectacle with Dielectric Coated Glass Lens 40% VLT. Comfortable frame with a glass laser filter. 330 laser filter was primarily developed for protection from laser wavelengths 532 nm and 800-10600 nm. Optical Density (OD) Specifications: OD 6+ @ 532 nm OD 5+ @ 950-1000 nm OD 7+ @ 1000-1600 nm OD 5+ @ 1600-2400 nm OD 4+ @ 2400-2900 nm OD 5+ @ 2900-10600 nm Visible Light Transmission (VLT): 40%