抄録
Some experiments for press molding of glass spherical lens and its numerical simulation using finite element method were earned out The optimal molding condition of slow cooling time that gives appropriate transcription profile of the sphencal lens was investigated by the experimental tests Moreover, in order to investigate the temperature and internal stress distributions, numerical simulation was earned out using universal FEM program As a result of comparing experimental results with numerical ones, it was confirmed that the relationship between amount of shrink of spherical lens and slow cooling time estimated by FEM simulation approximately agreed with experimental value Furthermore, the optimal slow cooling time was concluded to be 300-600 s from a viewpoint of internal stress obtained by FE simulation
