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一、概述设计宽视场、大孔径光学仪器,消除高级球差和色差,提高照相物镜的成象质量,都需要采用高折射、低色散的光学玻璃材料。高折射低色散玻璃主要是指超重冕光学玻璃,也称“镧系稀土光学玻璃”。它是目前新品种光学玻璃中应用与研究最广泛的一种,其发展历史较长且比较成熟的一种。日本有压型的,我国有条型的。由于稀土金属原料价格昂贵,玻璃对粘土坩埚侵蚀剧烈,玻璃易失透,在普遍大量生产中制造工艺困难,所以需要采用特殊的工艺规程,对此有待于更进一步的研究与探索。
I. Overview The design of wide field of view, large aperture optical instruments, to eliminate the high spherical aberration and color to improve the imaging objective lens imaging quality, require the use of high refractive index, low dispersion optical glass material. High-index low-dispersion glass mainly refers to super-crown optical glass, also known as “lanthanide rare earth optical glass.” It is currently a new variety of optical glass applications and most widely studied, its development history is longer and more mature. Japan is pressured, China’s bar-type. Due to the high cost of rare earth metal raw materials, glass on the intense erosion of the clay crucible, easy to lose through the glass, in the mass production of manufacturing difficulties, so the need for the use of special procedures, which needs further research and exploration.