| 摘要 |
<p>Image pickup lens comprises: in order from an object side, a first lens having positive refractive power and a convex surface facing toward the object side; a meniscus-shaped second lens having negative refractive power and a convex surface facing toward the object side; a third lens having positive or negative refractive power; a fourth lens having positive refractive power and a convex surface facing toward an image side; and a fifth lens having negative refractive power and a concave surface facing toward the image side. An image-side surface of the fifth lens has an aspherical shape and inflection points at positions other than an intersection point with an optical axis, and the image pickup lens satisfies: 1.5<f12/f<3.0, where f12 is composite focal length of the first lens and the second lens, and f is focal length of an entire image pickup lens system.</p> |
