| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging lens and an imaging apparatus to have a small size, satisfy a wide angle that a total angle of view is larger than 180 degrees, and be able to obtain a fine image even in the peripheral portion of an imaging area, and exhibit a favorable optical performance. SOLUTION: The imaging lens 1 includes, in order from the object side, a negative first lens L1, a negative second lens L2, a positive third lens L3, a stop, and a positive fourth lens L4. In the imaging lens, each of the second lens L2, the third lens L3, and the fourth lens L4 has at least one aspheric surface, and an Abbe number of a material of the third lens L3 at the d-line is 35 or less. The imaging lens satisfies following conditional expression (1): -0.2<(R3+R4)/(R3-R4)<0.2, wherein R3 is a paraxial radius of curvature of the object-side surface of the second lens L2, and R4 is a paraxial radius of curvature of the image-side surface of the second lens L2. COPYRIGHT: (C)2011,JPO&INPIT |
