OPTICAL FIBRES AND OPTICAL FIBRE BUNDLES; OPTICAL FIBRE CABLESOTHER THAN THOSE OF HEADING NO8544; SHEETS AND PLATES OFPOLARISING MATERIAL; LENSES(INCLUDING CONTACT LENSES),PRISMS, MIRRORS AND OTHEROPTICAL ELEMENTS, OF ANYMATERIAL, UNMOUNTED, OTHERTHAN SUCH ELEMENTS OF GLASS NOTOPTICALLY WORKED.
HS codes falls under this category.