| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wide angle imaging lens satisfactorily correcting aberrations, being compact, light-weight and inexpensive, and having excellent optical performance. <P>SOLUTION: The imaging lens includes three lenses, namely, in order from the object side, a first lens 110 having a negative refractive power, a second lens 120 having a positive refractive power, an aperture stop 130, and a third lens 140 having a positive refractive power. The first lens 110 has a meniscus shape with its convex surface facing the object side and an aspherical shape on the image surface side. The second lens 120 has a meniscus shape with its convex surface facing the image side and an aspherical shape on at least one of the surfaces. The third lens 140 has a biconvex shape and an aspherical shape on at least one of the surfaces. The focal lengths and the Abbe numbers of the lenses are appropriately set. <P>COPYRIGHT: (C)2013,JPO&INPIT |
