| 摘要 |
An imaging lens has a compact shape and sufficiently compensates for various aberrations. The imaging lens includes a first lens, a second lens, and a third lens disposed sequentially, with the first lens toward an object. The conditions "0.5H<T0<0.7H," "2<phir4/phi<2.5," and "0.15<phir5/phi<0.3" are satisfied, where: H is the effective radius of the surface of the third lens facing an image surface; T0 is the distance between the optical axis and a point on a line parallel to the optical axis and normal to the surface of the third lens facing the image surface; phi is the combined refractive power of the imaging lens; phir4 is the refractive power of the surface of the second lens facing the image surface; and phir5 is the refractive power of the surface of the third lens facing the object.
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