| 摘要 |
PROBLEM TO BE SOLVED: To realize miniaturization and to make optical performance excellent. SOLUTION: The photographic lens is provided with a 1st lens 2 whose 1st surface S1 is concave, a 2nd lens 3 whose 4th surface S4 is convex, a 3rd lens 4 whose both surfaces are concave, a 4th lens 5 whose 8th surface S8 is convex, and a 5th lens 6 which forms an image by correcting the distortion of an image and whose 9th surface S9 is convex. Since the 1st surface S1 is concave, a distance between the 1st lens 2 and the 2nd lens 3 is shortened and the miniaturization is realized, and the optical performance is made excellent by correcting the image formed on an image surface W by the 5th lens 6. COPYRIGHT: (C)2004,JPO
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