Our zinc selenide has two categories: laser lens blank, coating material. The product in this picture is laser lens blank. Applied in: Reflector; Beam expanding lens; Field flattening lens; Infared lens; Polarization microscope We follow critical manufacture standards, quality assurance, welcome your consultation Specifications Summary: Zinc selenide(Chemical formula: ZnSe) 1.laser lens blank: dia 20-100mm 2.coating material: powderâ?¥ 300 mesh 3.coating material: granules: 1-40mm 4.color: orange transparent 5.purity:99.99% 6.package: packed with soft paper or 1 KG/ bag 7.storage: avoid exposure to sunlight & acid keep dry zinc selenide properties: 1.cas no.: 1315-09-9 2.density (g/cm3): 5.27 3.melting point(â??): 1520 4.refractive index at 550nm: 2.58 5.transparency range(μm): 0.5-22 6.evaporation source:E; B(Ta, Mo) 7.applications: reflector; beam expanding lens; field flatting lens; infrared lens; polarization microscope