| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plastic optical element having fine pattern on optical surface by devising a shape of a plastic lens perfectly releasing plastic material on an end part of a fine pattern on an optical surface from a mold, and preventing the end part of the fine pattern being deformed by a releasing resistance, so as to mold the plastic lens having the fine pattern on the optical surface with a high shape accuracy without throwing out a cycle time of an injection molding because of an increase of times of maintenance of the mold. <P>SOLUTION: The plastic optical element having a fine pattern formed on one side optical surface comprises the end part of the fine pattern formed by allowing the fine pattern to intersect a side surface of the optical element adjacent to the optical surface on an area of a side edge part of the optical surface where a luminous flux is not transmitted or reflected, wherein an angle of all the end parts of the fine pattern is 45° or more. <P>COPYRIGHT: (C)2010,JPO&INPIT |
