| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-precision aspheric plastic lens in which no bubble, sink mark, undulation, or the like occurs. Ž<P>SOLUTION: An injection mold of the aspheric surface plastic lens is provided with an incidence plane to which an radiation enters, and an outgoing radiation plane from which the radiation is emitted. In the injection mold, a first mold provided with a first cavity surface for molding the incidence plane and a second mold provided with a second cavity surface for molding the outgoing radiation plane are constituted to be splittable on a parting line face, a gas vent is provided on the edge of the most distant part from the parting line surface in the first cavity surface and the edge of the most distant part from the parting line surface in the second cavity surface. In the high-precision aspheric surface plastic lens, no bubble, sink mark, undulation, or the like occurs around the optical surface. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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