希土光学玻璃具有高折射率和低色散的特点,适用于寬视场、大孔徑的光学仪器,使用此等玻璃不仅能提高光系統的成象质量,容易消除象差,而且由于曲率半徑的减小,可增加光学系統的相对孔徑,并降低冷加工的成本。为了制成光学常数范圍寬广的光学玻璃品种,除了使用镧、铈等希土氧化物外,还在玻璃中加入钍、锶、鎘、鈹、钛、鈷、铊、钽、鎢、鉍等希有金属氧化物。利用上述氧化物,我們在实驗室規模下,制成折射率自1,64至1,92,色散倒数自60至30一系列 With its high refractive index and low dispersion, STI optical glass is suitable for wide field of view and large aperture optical instruments. The use of these glasses not only improves the imaging quality of the optical system but also easily eliminates the aberration. Moreover, due to the curvature radius Reduce, can increase the relative aperture of the optical system, and reduce the cost of cold work. In order to produce a wide range of optical constant optical glass varieties, in addition to the use of lanthanum, cerium and other rare earth oxides, but also added to the glass of thorium, strontium, cadmium, beryllium, titanium, cobalt, thallium, tantalum, tungsten, bismuth, etc. Greek metal oxide. Using the above oxides, we have made a series of experiments on a laboratory scale with a refractive index ranging from 1,64 to 1,92 and a dispersion from 60 to 30