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NHG has the production capacity of 8-12 inches optical glass wafers whose refractive index(nd) ranges from 1.5-1.7-1.8-1.9-2.0. The production capacity of wafer optical glass is 30000KG/month/single production line. NHG has the unique production capacity of over 2.0 refractive index 12 inches wafer glass and the production technology to make the nd tolerance of optical glass within ±5*10-5 to reach the mass production supply at lower cost.