摘要: Provided is an optical glass having a high refractive index, low density, and good manufacturing properties. An having: index (nd) of 1.68 to 1.85; density (d) 4.0 g/cm3 or less; temperature where viscosity becomes log η=2 950 1200° C., component using the are provided. This has properties, suitable as wearable equipment, for vehicle mounting, robot so on.