| 摘要 |
The present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having positive (+) refractive power, a second lens having negative (−) refractive power, a third lens having positive (+) refractive power, a fourth lens having positive (+) refractive power, and a fifth lens having negative (−) refractive power, wherein an aperture is interposed between the first and second lenses, and the imaging lens meets a conditional expression of 20<V2<30 and 50<V3,V4,V5<60, where Abbe′ number of second lens is V2, Abbe's number of third lens is V3, Abbe's number of fourth lens is V4, and Abbe's number of fifth lens is V5. |
| 主权项 |
1. An imaging lens, the imaging lens comprising, in an ordered way from an object side:
a first lens having positive (+) refractive power; a second lens having negative (−) refractive power; a third lens having positive (+) refractive power; a fourth lens having positive (+) refractive power; and a fifth lens having negative (−) refractive power, wherein the third lens has an image side surface taking a convexly formed meniscus shape, wherein the fourth lens has an image side surface taking a convexly formed meniscus shape, and wherein the imaging lens meets a conditional expression of 0.5<f1/f<1.5, where f is an entire focus distance of the imaging lens, and f1 is a focus distance of the first lens. |
