| 摘要 |
Disclosed herein is an imaging lens, including: a first lens having positive (+) power and being biconvex; a second lens having negative (−) power and being concave toward an image side; a third lens having positive (+) power and being biconvex; a fourth lens having positive (+) power and being convex toward the image side; and a fifth lens having negative (−) power and being concave toward the image side, wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially disposed from an object side. |
| 主权项 |
1. An imaging lens, comprising:
a first lens having positive (+) power and being convex toward an object side; a second lens having negative (−) power and being concave toward an image side; a third lens having positive (+) power and being convex toward the image side; a fourth lens having a power and being convex toward the image side; and a fifth lens having a power and being concave toward the image side, wherein an object-side surface of the fifth lens is convex in the center and concave at the periphery, and at least one inflection point is formed on an image-side surface of the fifth lens, wherein:
the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially disposed from the object side toward the image side,the second lens, the fourth lens, and the fifth lens have a meniscus shape,a radius of curvature of an object-side surface of the second lens is greater than a radius of curvature of an image-side surface of the second lens, anda radius of curvature of an object-side surface of the fourth lens is greater than a radius of curvature of an image-side surface of the fourth lens. |
