China Znse Lens Dia 20mm CO2 10.6um Laser Cutting Engraving

FeatureMateial: ZnSeDiameter: 20mmFocal length: 50.8mm (2'')Optional Focus Length: 63.5mm(2.5''),100mm(4'')ZnSe is used for optical windows, lenses, mirrors, prisms and optical blanks, plates, disks, sheets, slabs particularly for infrared applications.Zinc Selenide (ZnSe) - transparent in wide spectral range from yellow (visible) to far IR. ZnSe material is a chemically inert, non-hygroscopic and highly pure product that is very effective in many optical applications due to its extremely low bulk losses, high resistance to thermal shock and stability in virtually all environments, easily machined. To obtain superior transmittance, ZnSe crystals are grown by Chemical Vapor Deposition process . Zinc Selenide is polycrystalline material, demonstrates superior CO2 laser transmittance and is employed in the transmission optical components used in CO2 laser processing.

Diam20mm

Thickness

approximate 2mm

Tolerance of Thickness

±0.010''

Diameter

+0.001''-0.005''

Edge thickness variation (ETV)

<= 0.002''

Aperture

90% of the Diameter

Face accuracy (radial deviation / irregularity) at 0.63um

<= 0.20%

Surface Figure (power-irregularity) at 0.63 um

Plano:0.1 fringe - 0.5 fringe Radiused: depending on radius

Surface Quality

20-10

AR Coating Reflectivity Per surface at 10.6 microns

<= 0.20%