| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an imaging lens system easy to be manufactured and having a sufficient aberration correction capability.SOLUTION: An imaging lens system 101 according to the present invention includes, in order from an object side to an image side: a first lens L1 having negative power and having a meniscus shape with a concave surface on the image side; a second lens L2 having negative power and having a concave surface on the image side; a third lens L3 having positive power and having a convex surface on the object side; a fourth lens L4 having negative power; a fifth lens L5 having positive power; and a sixth lens L6 having positive power. The fourth lens L4 and the fifth lens L5 of the imaging lens system 101 are bonded to each other by an adhesive layer provided between an image-side lens surface S9 of the fourth lens L4 and an object-side lens surface S10 of the fifth lens L5, and a conditional expression of 0.9≤R/f≤1.3 is satisfied if assuming that a focal length of the entire lens system 101 is f and a curvature radius of the image-side lens surface S9 of the fourth lens L4 is R.</p> |
