| 摘要 |
An image pickup lens is disclosed, comprising three lenses characterized in that the lenses comprise a first lens L 1 having a convex surface facing a subject side and positive refracting power, an aperture S, a second lens L 2 having a convex surface facing an image side and negative refracting power, and a third lens L 3 having a concave surface facing the image side and positive refracting power which are disposed sequentially from the subject side as well, all the lens surfaces are composed of aspheric surfaces and the following conditional formulas (A0) and (A1) are satisfied. <?in-line-formulae description="In-line Formulae" end="lead"?>f/f2<-0.9 . . . (A0)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>2<|R21-R22|/|R21+R22|<5 . . . (A1)<?in-line-formulae description="In-line Formulae" end="tail"?> With this arrangement, there is provided a compact and less expensive image pickup lens having a good optical performance and used to a solid image pickup device and an image pickup device using the image pickup lens.
|
