The invention provides
optical glass for precision compression moulding forming, wherein the nd is between 1.63 and 1.75, and the vd is between 27 and 37. The
optical glass does not contain compositions with high price such as Nb2O5 and Ta2O5, and the Tg is less than 520 DEG C. The
optical glass for precision compression moulding forming comprises the following compositions by
molar percentage: 40 to 60 percent of SiO2, 15 to 30 percent of TiO2, 10.5 to 30 percent of Li2O+Na2O+K2O+Cs2O, 0 to 8 percent of MgO+CaO+SrO+BaO, 0 to 2 percent of Ta2O5+ WO3+Nb3O5, 0 to 1 percent of Al2O3, 0 to 1 percent of ZrO2, 0 to 5 percnet of B2O3, 0 to 2 percent of La2O3, and 0 to 0.1 percent of
clarifying agent. The optical glass is suitable for precise
compression molding forming, has superior
devitrification resistance, good fusing performance, forming performance and processability, and
crystallization stability for realizing continuous fusing. An optical element made of the optical glass is suitable for the technical fields such as imaging
system, medical technology, digital projection, photoetching technique and
wafer /
chip.