| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging lens, favorably correcting aberrations, while being small in size. SOLUTION: The imaging lens is configured by arranging a double-convex positive first lens L1, a double-concave negative second lens L2 and a positive third lens L3, having positive radius of curvature both on the object side and on the image surface side, in the order starting from the object side to the image surface side. In this configuration, if the focal length of the first lens L1 is f1 and the focal length of the second lens L2 is f2, f1<¾f2¾ is satisfied. COPYRIGHT: (C)2011,JPO&INPIT
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