| 摘要 |
PURPOSE:To obtain a necessary quantity of spherical optical elements with the superior precision by arranging an accommodation chamber which has a fluid feeding hole which is internally formed on the lower edge surface of a holder and accommodates a polished member and a negative electrode arranged in the vicinity of the worked surface of an electric conductive grinding tool. CONSTITUTION:An electric conductive grinding tool 2 is set as positive electrode and an electrode 16 is arranged as negative electrode in the vicinity of a worked surface, to apply votage between the two electrodes. Then, electrically weak coolant 22 is interposed between the worked surface of the electric conductive grinding tool 2 and the electrode 16, and a polished member (spherical optical element) 12 in an accommodation chamber 9 is worked into spherical form through pressing, by the fluid supplied from a feeding hole 14 on a holder 7. |
