Our company mainly produces every type of colored optical glass,colourless optical glass,(ray)filter,(colour) filter,heat insuation glass,quartz glass,infra-red glass,near-infra-red glass,ultraviolet black glass,neutral gray glass,orange glass,green glass,yellow glass,band-pass filter,filter specially used by automatic meney counting machine and so on.Mainly use in photographic equipment,instruments and meters,optical instruments,medical instruments,teaching instruments,silde projector,projiction apparatus,ultraviolet analytical instuments,finanical tools,stage lamp-lighting,touching screen,button of lifter,airport lights and on.Special services in the national defense,aeropace,medicine and biology sientific research institutions and public security units and so on.Products are mainly sold to Europe.America,Southeast Asia,Japan,South Korea,and the Hongkong,Macao and Taiwan regions,deeply trusted by users.