Patent ID: 8467137

Claim:
An imaging lens unit for a solid-state image sensor, comprising: an aperture stop; a first lens with positive refractive power having convex surface facing an object side; a second lens with negative refractive power having a convex surface facing the object side near an optical axis; a third lens with negative refractive power having a convex surface facing the object side near the optical axis; a fourth lens as a meniscus lens with positive refractive power having a convex surface facing an image side near the optical axis; and a fifth lens with negative refractive power having a concave surface facing the image side near the optical axis, wherein the aperture stop and the lenses are arranged in order from the object side to the image side; and wherein the third lens has aspheric surfaces whose power changes from negative to positive in a remoter area from the optical axis or peripheral area.