IMAGE LENS WITH HIGH RESOLUTION, LOW CHROMATIC ABERRATION, AND LONG FLANGE BACK DISTANCE

An image lens includes a first lens and a second lens. The first lens includes a first surface and a second surface. The second lens includes a third surface and a fourth surface. The image lens satisfies: FB/TTL>0.38; R11/F1>2.23; Z/Y>0.11; Z/T<0.42; R23/F2<R12/F2<R24/F2. FB is a distance between the fourth surface and an image plane, TTL is a total length of the image lens, Z is a distance from a central point of the fourth surface to an outer edge of the fourth surface along an optical axis of the image lens, Y is a distance from the central point of the fourth surface to the edge of the fourth surface along a direction perpendicular to the optical axis, T is a thickness of the second lens, R23, R24, R11 and R12 are curvature radiuses of the third, fourth, first and second surfaces, F2 is a focal length of the second lens.