Patent ID: 7383697
Filing Date: 2008-06-10
Classification: C03B

Abstract:
1. A method for molding an optical element by pressing a glass material in a mold, the method comprising: heating to soften the glass material outside a cavity of the mold; heating the mold; putting the heated glass material into the heated mold; and pressing the glass material with the mold after putting the glass material into a cavity of the mold, wherein, when the glass material is put into the mold a temperature of the glass material is in a range of (Tg×1.60)° C. to (Tg×1.85)° C., and a temperature at an optical transfer surface of the mold is in a range of (Tg+50)° C. to (Tg−70)° C., where Tg is the glass-transition temperature of the material.