| 摘要 |
An imaging lens, including in order from an object side to an image side, an aperture stop, a first lens formed in a biconvex shape having a positive refractive power, a second lens having a negative refractive power with a surface on the image side formed to be a concave surface, a third lens having a positive refractive power with a convex surface faced to the image side, and a fourth lens having a negative refractive power with a surface on the image side formed to be a concave surface.
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