Custom manufactured ZnSe optics that are optimized at 1064 nm for Nd:Yag lasers and can include various configurations and coatings are available from Laser Research Optics of Providence, Rhode Islands.
Laser Research ZnSe Optics are optimized at 1064 nm for Nd:Yag medical lasers and can be custom manufactured as plano-convex and plane-parallel discs, output couplers, and mirrors. Fabricated to OEM specification in 1/2” and 3/4” sizes, they can be supplied with dual-band and reflectance coatings up to 95 percent on each side.
Suitable for virtually all types of medical lasers, Laser Research ZnSe 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-mins. maximum parallelism.

(Credit: Laser Research Optics)