PRESS FORMING DIE FOR OPTICAL LENS, OPTICAL LENS MADE OF GLASS, AND METHOD FOR MANUFACTURING OPTICAL LENS MADE OF GLASS

PROBLEM TO BE SOLVED: To provide a press forming die for an optical lens, in which a stress caused in a lens material at a release is reduced, and the generation of glass sticking upon fabrication is controlled. SOLUTION: The press forming die for the optical lens for forming a diffraction lens 601 that has two or more orbicular zones 101a of a concentric circle includes: a diffraction effect transfer surface 102 for forming a diffraction effect surface 12 to diffract a light of diffraction lens 601; and a level difference transfer surface 103 for forming a level difference surface 13 that connects the adjacent diffraction effect surfaces 12 of the diffraction lens 601 to each other. The surface roughness of the level difference transfer surface 103 is larger than that of the diffraction effect transfer surface 102. COPYRIGHT: (C)2011,JPO&INPIT