Base glass for gradient index lens and gradient index lens

The invention discloses base glass for a gradient index lens and a gradient index lens. The base glass for the gradient index lens is prepared from the following components in parts by mass: 50-64 parts of SiO2, 1-15 parts of B2O3, 0-6 parts of Al2O3, 0-5 parts of MgO, 0-8 parts of ZnO, 0-6 parts of CaO, 0-3 parts of BaO, 8-13 parts of Tl2O, 0-8 parts of Na2O, 0-2 parts of K2O, 0-1 part of ZrO2 and 0.5-1 part of In2O3, wherein the preconditions are: 60-65 parts of SiO2 and B2O3, 10-14 parts of Al2O3, MgO and ZnO, and 21-24 parts of CaO, BaO, Tl2O, Na2O, K2O, ZrO2 and In2O3. According to the base glass for the gradient index lens, a large aperture is easy to achieve, and the base glass for the gradient index lens is high in transmittance, fast in ion exchange speed, high in thermal stability and chemical stability and low in volatilization during high-temperature refining. 本发明公开种梯度折射率透镜用基础玻璃及梯度折射率透镜，所述梯度折射率透镜用基础玻璃，按物质的量份数计包括以下组分：SiO50～64份，BO1～15份，AlO0～6份，MgO 0～5份，ZnO 0～8份，CaO 0～6份，BaO 0～3份，TlO 8～13份，NaO 0～8份，K