Dear Sirs,Intrinsic Crystal Technology Co.,ltd is an infrared material factory & customized optics supplier located in China.we are of an ISO9001:20008 certificate with 80 wrokers total in 2600 square meters working room.we begin to doing international business since 2008 years and the core business are as following. Supply: CaF2, BaF2, MgF2, Si, and Ge material rod and blank (size tolerance diameter +/-0.05mm)CaF2: ; mono or poly crystal, less than 250mmBaF2: , mono or poly, less than 150mmMgF2: C-axis, mono, less than 130mmSilicon: , optical or mirror grade, less than 300mmGe: mono or poly, less than 250mm, Supply: IR window and Customize lensIR windows stock: 0.5inch, 1.0inch, 2.0inch, 3.0inch, 4.0inch in stock with good price.IR lenses: plano-convex, bi-convex,Glass elements: material from CDGM, and Schott for prism, and flats. These IR windows and lenses are for FTIR instrument, IR detector, Gas sensor, Flame Detector, and Electric Panel Viewport.