| 摘要 |
Disclosed is an imaging lens system. The disclosed imaging lens system comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from an object toward an image surface, wherein the first lens with a positive refractive power has a convex shape toward the object, the second lens with a negative refractive power has a meniscus shape concave toward the image surface, the third lens has a positive refractive power, the fourth lens with a negative refractive power has a meniscus shape concave toward the object, and the fifth lens with a negative refractive power has a meniscus shape of which the part around an optical axis is concave toward the image surface. The disclosed imaging lens system satisfies the following condition of f_34/f < -5, wherein, f is a focal length of the entire imaging lens system, and f_34 is a combined focal length of the third and fourth lenses. |
