首页>
外国专利>
Method of production of high-refractive thin glass substrates
Method of production of high-refractive thin glass substrates
展开▼
机译:高折射薄玻璃基板的生产方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A redrawing method for the production of thin glasses is provided that allows redraw of high refractive index optical glasses. The includes the steps of providing a vitreous preform with a mean width B, a mean thickness D, and a refractive index nD of at least 1.68 in a redrawing device, heating at least a part of the preform, redrawing of the preform to a thin glass with a mean width b and a mean thickness d. The heated part of the preform exhibits, for the duration of at most 30 minutes, a temperature above a lower limit of devitrification of the glass. The glass of the preform exhibits a dependence of the viscosity on the temperature, which is characterized by a mean decrease of the viscosity with increasing temperature in an viscosity range of 108 to 105 dPas of at least 3*105 dPas/K.
展开▼