| 摘要 |
The image pickup lens is composed of, in order from the object side, an aperture stop; a first lens with positive refractive power, including a convex surface facing the object side; a second lens with negative refractive power, including a concave surface facing an image side; a third lens with positive refractive power, including a convex surface facing the image side; a fourth lens with positive refractive power, having a meniscus shape including a convex surface facing the image side; and a fifth lens with negative refractive power, including a concave surface facing the image side. The image pickup lens satisfies conditional expressions relating to curvature radiuses of the object-side surface and the image-side surface of the fourth lens, a distance on an optical axis from the aperture stop to a focal point at the image side, and a focal length of the total system of the image pickup lens. |
