| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for forming a tetrahedral amorphous carbon film for glass pressing, which is free from generation of mold-release failure, welding failure and peeling failure of formed film in the peripheral part of a mold, to a mold for molding a plurality of optical elements having a large opening angle. <P>SOLUTION: A magnet 4 is arranged at the inside of each mold base material 11 having a projected molding surface, and a ring-like magnet 5 is arranged at the outside of the each mold base material 11. In such a state that the plurality of mold base materials 11 are arranged concentrically, the magnetic flux density in the normal line direction at the vertex of the mold base material 11 is made highest, in the magnetic field formed by the magnet 4 and the ring-like magnet 5, and the tetrahedral amorphous carbon film is formed on the molding surface of each mold base material 11 by a filtered cathodic vacuum arc method while applying a voltage to the each mold base material 11. <P>COPYRIGHT: (C)2013,JPO&INPIT |
