| 摘要 |
A first lens surface includes a first optically effective surface, and a convexly first engagement portion which protrudes toward a second lens side from an optical extended surface formed with the same curvature as the first optically effective surface as a position substantially corresponding to an outer edge of the first optically effective surface. A second lens surface includes a second optically effective surface larger in diameter than the first optically effective surface, and a convexly second engagement portion, which is provided outside the second optically effective surface, which protrudes toward a first lens side, which is engaged with the first engagement portion, which positions the first lens and the second lens. |
| 主权项 |
1. A lens unit structure for a molded lens which comprises at least two lenses, disposed to face each other, and which is held while a first lens and a second lens that are disposed to face each other overlap,
the first lens comprising a first lens surface facing the second lens, the first lens surface comprising a first optically effective surface, and a convexly first engagement portion which protrudes toward the second lens side from an optical extended surface formed with the same curvature as the first optically effective surface as a position substantially corresponding to an outer edge of the first optically effective surface, the second lens comprising a second lens surface facing the first lens surface, the second lens surface comprising a second optically effective surface larger in diameter than the first optically effective surface, and a convexly second engagement portion, the second engagement portion being provided outside the second optically effective surface, the second engagement portion protruding toward the first lens side, the second engagement portion being engaged with the first engagement portion, the second engagement portion positioning the first lens and the second lens relative to each other. |
