| 发明名称 |
IMAGING LENS AND IMAGING APPARATUS INCLUDING THE IMAGING LENS |
| 摘要 |
An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a biconvex shape, a second lens that has a negative refractive power, a third lens that has a negative refractive power and has a meniscus shape which is concave toward the object side, a fourth lens that has a positive refractive power, and a fifth lens that has a negative refractive power and has an aspheric shape which is concave toward an image side and of which an image side surface has an extreme point. Further, the imaging lens satisfies predetermined conditional expressions. |
| 申请公布号 |
US2014293448(A1) |
申请公布日期 |
2014.10.02 |
| 申请号 |
US201414219705 |
申请日期 |
2014.03.19 |
| 申请人 |
FUJIFILM Corporation |
发明人 |
KANDA Hideo;KOIKE Kazumi |
| 分类号 |
G02B13/00 |
主分类号 |
G02B13/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An imaging lens substantially consisting of, in order from an object side, five lenses of:
a first lens that has a biconvex shape; a second lens that has a negative refractive power; a third lens that has a negative refractive power and has a meniscus shape which is concave toward the object side; a fourth lens that has a positive refractive power; and a fifth lens that has a negative refractive power and has an aspheric shape which is concave toward an image side and of which an image side surface has an extreme point, wherein the following conditional expressions (1) and (2) are satisfied:
−2<f/f45<0 (1), and0<f/f4<0.84 (2), where f is a focal length of a whole system, f45 is a composite focal length of the fourth and fifth lenses, and f4 is a focal length of the fourth lens. |
| 地址 |
Tokyo JP |
