| abstract |
There is provided a small imaging lens having a five-lens structure that has sufficient brightness of about F2 and various aberrations are favorably corrected. The imaging lens includes, in order from the object side, a first lens L1 having a positive refractive power and having a convex surface facing the object side, and a second lens having a negative refractive power and having a concave surface facing the image side. A lens L2, a third lens L3 having positive or negative refractive power, a fourth lens L4 having positive refractive power and having a convex surface facing the image side, and a concave surface having negative refractive power and having a negative refractive power on the image side The image side surface of the fifth lens has an aspheric shape and has an inflection point at a position other than the intersection with the optical axis. [Selection] Figure 1 |