Patent ID: 7134299
Filing Date: 2006-11-14
Classification: C03B,Y02P

Abstract:
1. A process for the production of glasses highly transmittive in the UV range by means of a melting process carried out in a melt tank in which there is a glass melt having a melt surface, comprising: steadily feeding a well-homogenized mixture of highly pure glass raw materials of the highly transmittive glasses to be melted through a feed opening of the melt tank in such a manner that a closed mixture cover arises on the melt surface; supplying energy to the glass melt only below the melt surface without supplying energy to the melt surface or the space above the melt surface; and agitating the melt; wherein material from the mixture resting on the melt surface is uniformly intermixed and sub-mixed into the melt, and wherein the space above the melt has a temperature in the range of 500° C. to 700° C.