Imaging Lens And Imaging Device

摘要

Imaging lens including four lenses capable of widening an angle of view and reducing height compared to a conventional imaging lens while reducing cost and securing optical performance. The lens includes a first lens, a second lens, a third lens, and a fourth lens in order from an object side. The first lens and the second lens have negative refractive power. An object-side surface of the first lens has an aspherical shape. Moreover, the imaging lens satisfies the following conditional expressions:;−2.8

主权项

1. An imaging lens comprising, in order from an object side:
a first lens having negative refractive power; a second lens having negative refractive power; a third lens; and a fourth lens, wherein an object-side surface of the first lens is formed to have an aspherical shape, and the imaging lens satisfies the following conditional expressions:
−2.8 f2 represents a focal length (mm) of the second lens, f represents a focal length (mm) of an entire system, r1 represents a radius of curvature (mm) of the object-side surface of the first lens, and r2 represents a radius of curvature (mm) of an image-side surface of the first lens.