Patent ID: 6105395
Filing Date: 2000-08-22
Classification: C03B,G02B

Abstract:
A method for manufacturing a glass product comprising the steps of:preparing a mold having a size satisfying, as a function of a size of a fine structure at a room temperature, a formula:(1+(.alpha.g-.alpha.m).times..DELTA.T).times.Sgwherein Sg denotes a size of a fine structure of the glass product at the room temperature; .alpha.g denotes a mean thermal expansion coefficient of the glass to be molded in a temperature range from the room temperature to the glass transition temperature of the glass to be molded; .alpha.m denotes a mean thermal expansion coefficient of the mold in a temperature range from the room temperature to the glass transition temperature of the glass to be molded; .DELTA.T denotes the difference between the room temperature and the glass transition temperature of the glass to be molded;heating glass at sag temperature of the glass or above;pressing the heated glass using the mold to form the glass product having the fine structure; andafter the glass is molded with pressure, releasing the pressure exerted on the glass product by the mold at a temperature of the glass transition temperature or less.