A line of larger CO2 focusing lenses for industrial steel cutting lasers that are stocked in a variety of sizes and focal lengths for 24-hour delivery is available from Laser Research Optics.
Intended for 25 to 200 Watt lasers as direct replacements for most standard OEM lenses, they come in two versions: one with standard A/R coatings that provide <0.2% total absorption and another featuring a proprietary Cool-Cut coating, which absorbs <0.15% of laser energy and protects against thermal damage.
