| 摘要 |
PROBLEM TO BE SOLVED: To stably and inexpensively produce an optical element having good profile irregularity and a small eccentricity. SOLUTION: When forming an optical element by softening a glass raw material by heating and pressing the glass raw material with a pair of forming molds to form an optical element, one face of the glass raw material is formed into an optical functional surface 6a by aspheric surface of lower mold 2 of the pair of forming molds when the glass raw material is pressed and outer peripheral part 6b of the above optical element 6 is formed by cylindrical side 3a integrally provided coaxially to center axis of the optical functional face 6a in a fringe area part 6b of the above aspheric surface 2a and the optical element 6 is held based on the outer peripheral part 6b of the above optical element 6 and a forming face 6c of the optical element 6 press-formed by a forming surface 1a of the upper mold 1 is ground so as to have optical functional surface.
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