| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging lens capable of completely meeting demands for downsizing, reduction of weight and further improvement in optical performance, and further improving manufacturability.SOLUTION: The imaging lens includes, in order from an object side to an image surface side, a diaphragm 2, a first lens 3 as a positive meniscus lens turning its convex surface to the object side, and a second lens 4 as a positive meniscus lens turning its convex surface to the image surface side. The imaging lens satisfies respective conditional expressions; 0.8≤L/fl≤1.25, 0.9≤f/fl≤1.0, 10≤f/fl≤25 and 0.5≤d/d≤1.0 (provided that L: entire length of a lens system, fl: focal length of the entire lens system, f: focal length of the first lens, f: focal length of the second lens, d: center thickness of the first lens, and d: space between the first lens and the second lens on an optical axis). |
