| 摘要 |
PROBLEM TO BE SOLVED: To restrict generation of chips by cutting a resin board at once. SOLUTION: A current is supplied to metal wires 13 by a power source 11 to generate Joule's heat J. All the metal wires 13, 13... are simultaneously pressed to a resin board 14 to fusion-cut it into strips. The resin board 14 can thus be efficiently cut in a short time. Since the resin board 14 is thus fusion-cut, generation of chips can be prevented. Contamination on action parts of optical elements mounted on the separated strips of the resin board 15 to deteriorate functions of the optical elements can thus be prevented.
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