| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a both-side aspheric lens, in which the centers of optical axes of the first and second surfaces of the lens fit accurately with each other, by using a most inexpensive multi-cavity injection molding mold. SOLUTION: The lens 10 has two divided surfaces 11b and 12b divided in the direction of the optical axis between the entry surface 11a and the injection surface 12a, and the divided surfaces 11b and 12b are both flat. The lens are injection-molded by injection-molding the portion from the injection surface 12a to the divided surface 12b with a front member 12 and then separately injection-molding the portion from the divided surface 11b to the entry surface 11a with a rear member 11, with the molded resins being the same. The injection-molded lens members, or the front member 12 and the rear member 11, are bonded together by applying a UV-curable adhesive to between the divided surfaces 11b and 12b. After center-matching of the optical axes of the entry surface 11a and the injection surface 12a, the resultant article is irradiated with UV light to cure the UV-curable adhesive in order to form a single lens. COPYRIGHT: (C)2009,JPO&INPIT
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