| 摘要 |
An image pickup lens is provided to reduce a manufacturing cost by using the same material for forming a second lens and a third lens. An image pickup lens includes an aperture stop, a first lens(L1), a second lens(L2), a third lens(L3), and a fourth lens(L4). The aperture stop, the first lens, the second lens, the third lens, and the fourth lens are formed from the object in order. The first lens has a positive refractive power. The second lens has the negative refractive power. The second lens has the upper part which is a concave surface. The third lens includes at least one aspherical surface. The fourth lens includes at least one aspherical surface.
|
