IMAGING LENS

摘要

Designed for a solid-state image sensor, it includes, in order from an object side to an image side: a first positive lens having a convex object-side surface; a second negative lens having a concave image-side surface; a third positive meniscus lens having a convex image-side surface; and a fourth negative lens having concave object-side and image-side surfaces near an optical axis. A first diffraction optical surface is formed on one lens surface of the first to third lenses, and a second one is formed on the fourth lens object-side surface. The imaging lens satisfies a conditional expression below,;0.0

主权项

1. An imaging lens for a solid-state image sensor in which elements are arranged in order from an object side to an image side, comprising:
a first lens with positive refractive power having a convex surface on the object side; a second lens with negative refractive power having a concave surface on the image side; a third lens with positive refractive power as a meniscus lens having a convex surface on the image side; and a fourth lens with negative refractive power having a concave surface on each of the object side and the image side near an optical axis, wherein a first diffraction optical surface is formed on one of lens surfaces of the first to third lenses, a second diffraction optical surface is formed on the object-side surface of the fourth lens, and a conditional expression (1) below is satisfied:
0.0