GLASS FOR PRESSED LENS AND PRODUCTION OF PRESSED LENS

• Main Author: HIROTA SHINICHIRO
• Format: Patent
• Language: English
• Published: 24.12.1987
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

PURPOSE:To produce a glass for the molding of pressed lens preventing the fusion of the glass to a mold in compression molding, by coating a surface of an inner glass with a surface glass layer having higher glass transition temperature than the inner glass. CONSTITUTION:A disk-shaped inner glass 1...