Medical CO2 Laser Optics feature 40-20 scratch-dig surface finishes.
Press Release Summary:

Medical CO2 Laser Optics are available in ZnSe plano-convex and plane-parallel discs, output couplers and mirrors. Units come in ½ in. and ¾ in. O.D. sizes and come with dual-band and reflectance coatings. Products offer surface accuracy of 10.6 microns and meet MIL-O-13830 standards.
Original Press Release:
Laser Research Optics Introduces New Line of Medical CO2 Optics for Tattoo Removal Lasers
Laser Research Medical CO2 Laser Optics are optimized for 1064 nm and 1.06 µm for Nd:yag lasers used for tattoo removal and other dermatology procedures.
Laser Research Optics has introduced a line of OEM quality, laser-grade ZnSe optics that can be supplied in a variety of configurations for various types of tattoo removal lasers.
Laser Research Medical CO2 Laser Optics are optimized for 1064 nm and 1.06 µm for Nd:yag lasers used for tattoo removal and other dermatology procedures. Ideally suited for laser equipment OEMs, they are offered as ZnSe plano-convex and plane-parallel discs, output couplers, and mirrors manufactured to specification in 1/2” and 3/4” O.D. sizes.
Available with dual-band and reflectance coatings up to 95% on each side, Laser Research Medical CO2 Laser Optics feature 40-20 scratch-dig surface finishes per MIL-O-13830 (20-10 one face on plane-parallel) and 1/4th wave at HeNe flatness and surface accuracy at 10.6 microns, with 3 arc-minutes maximum parallelism.
Laser Research Medical CO2 Laser Optics are priced according to configuration and quantity. Price quotations are available upon request.