Patent ID: 7916405

Claim:
An imaging lens unit comprising: a first lens, an aperture stop, a second lens, and a third lens arranged sequentially along an optical axis from an object side toward an image side; the first lens including: a first surface located on the object side and being convex toward the object side; and a second surface located on the image side and being concave toward the image side near the optical axis and convex toward the image side as the first lens rim becomes closer, wherein an apex of the convexity on the second surface resides within an effective diameter of the second surface; the second lens being meniscus in shape and including: a first surface located on the object side; and a second surface located on the image side and being convex toward the image side; and the third lens including: a first surface located on the object side and being convex toward the object side near the optical axis and concave toward the object side as the third lens rim becomes closer; and a second surface located on the image side and being concave toward the image side near the optical axis and convex toward the image side as the third lens rim becomes closer.