| 摘要 |
<p>The present invention relates to an image pickup lens comprising: a lens group arranged at a closest position to an object side in the image pickup lens, comprising a first lens substrate being a parallel flat plate, a first lens with an Abbe number v1 and a positive refractive power, formed on an object side surface of the first lens substrate, and a second lens with an Abbe number v2 and a negative refractive power, formed on an image side surface of the first lens substrate, wherein a difference of the Abbe numbers v1 and v2 satisfies the following expression (1): (1) 10 < (v1 - v2), the image pickup lens further comprising: a lens group; and a lens A arranged at an image side of the lens group with a predetermined distance, wherein the lens group comprises a first lens substrate being a parallel flat plate, a first lens with an Abbe number v1 and a positive refractive power, formed on an object side surface of the first lens substrate, an object side surface of the first lens being a convex surface facing the object side, and a second lens with an Abbe number v2 and a negative refractive power, formed on an image side surface of the first lens substrate, an image side surface of the second lens being an concave surface facing the image side, the lens A is a lens or a lens group and has a positive or negative refractive power, and a difference of the Abbe numbers v1 and v2 satisfies the following expression 10 < ½ �¢ 1 - ½ �¢ 2 < 70.</p> |
