IMAGING LENS

摘要

PROBLEM TO BE SOLVED: To provide an imaging lens for solid-state imaging device whose optical performance is satisfactory, whose cost is low and which is of compact. SOLUTION: The imaging lens is composed, from the object side, of four lenses of a first lens (L1) having a positive optical power, an aperture stop (ST), a second lens (L2) having a positive optical power, a third lens (L3) having a negative optical power and a fourth lens (L4) having a negative optical power and fulfills a conditional expression: 0.5