The newest technology in Laser Safety Eyewear - The Microlite series of eyewear offers excellent protection for use in medical and industrial applications. Choose from a wide variety of lenses and filters. These lenses are used for a infra-red filter. AKG-5 Homium/Yag/Co2 Filter Wavelength Optical Density Color Visible Light Transmission OD>4+ from 870-950nm OD>5+ from 950-1000nm OD>7+ from 1000-1550nm OD>4+ from 1550-2750nm OD>6+ from 2800-11,000nm VLT = Excellent