| 摘要 |
An image pick-up lens system includes an aperture stop ( 10 ), a biconvex first lens ( 20 ), and a meniscus-shaped second lens ( 30 ) having a concave surface on a side of an object. The aperture stop, the first lens and the second lens are aligned in that order from the object side to an image side. Each of the lenses has at least one aspheric surface, and the following conditions are satisfied: (1) 0.5<fl/f<0.9, and (2) 1<T/f<1.62, wherein fl is a focal length of the first lens, f is a focal length of the system, and T is a length from the aperture stop to an image pick-up surface of the image side.
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