Image pickup lens and image pickup apparatus
AssigneeFUJIFILM Corporation
InventorYu KITAHARA
Life of this patent
Estimating the term…
Abstract
An image pickup lens having a four lens configuration in which a bi-concave first lens, a bi-convex second lens, a bi-concave third lens, and a positive fourth lens are disposed in this order from an object side. Here, at least one of the first, second, third, and fourth lenses has an aspherical surface on each side. The image pickup lens satisfies Conditional Expression (1) given below when a refractive index of the second lens with respect to d-line is taken as Nd2. 1.6<Nd2 (1)
Claims12
An image pickup lens having a four lens configuration in which a bi-concave first lens, a bi-convex second lens, a bi-concave third lens, and a positive fourth lens are disposed in this order from an object side, wherein:
- at least one of the first, second, third, and fourth lenses has an aspherical surface on each side;
- and
- the image pickup lens satisfies Conditional Expression (1) given below when a refractive index of the second lens with respect to d-line is taken as Nd2.
- 1.6<Nd2 (1)
Dependencies are inferred from the claim text.