发明名称 |
Method for producing plastic lens |
摘要 |
Provided is a method for producing a plastic lens, wherein, in molding a plurality of plastic lenses having different optical surface shapes simultaneously in a single mold 50, by designing cavities 3a and 3b such that each of the plastic lenses to be molded has the same volume, a plurality of plastic lenses having different optical surface shapes can be molded simultaneously in a single molding die without impairing the molding accuracy, and an injection compression molding apparatus used for such method. |
申请公布号 |
US9481137(B2) |
申请公布日期 |
2016.11.01 |
申请号 |
US201013504364 |
申请日期 |
2010.10.25 |
申请人 |
HOYA CORPORATION |
发明人 |
Saitou Kiyohiro;Kitabayashi Hayato |
分类号 |
B29D11/00;B29C45/56;B29L11/00;B29C45/26 |
主分类号 |
B29D11/00 |
代理机构 |
|
代理人 |
Kanesaka Manabu |
主权项 |
1. A method for producing a plastic lens wherein, when a plurality of plastic lenses having different optical surface shapes is molded simultaneously in a single molding die,
cavities are designed such that each of the plastic lenses to be molded has a same volume, and a raw material resin is filled in the cavities by injection and is molded into a predetermined lens shape, the method comprising: setting temporal lens shapes of the plastic lenses such that the temporal lens shapes have a same diameter and a same central thickness, obtaining a virtual average thickness of the temporal lens shapes, taking a plastic lens having a largest virtual average thickness as a standard lens, and correcting a thickness of one or more of the other plastic lenses by taking into consideration a difference between a virtual average thickness of the one or more of the other plastic lenses and a virtual average thickness of the standard lens such that a central thickness of the one or more of the other plastic lenses becomes larger than a central thickness of the standard lens by an amount corresponding to the difference, whereby cavities for the plastic lenses to be molded have the same volume. |
地址 |
Tokyo JP |