Imaging lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorTaro Asami
Life of this patent
Estimating the term…
Abstract
An imaging lens consists of negative first lens having a concave image-side surface, positive second lens, negative third lens, positive fourth lens, positive fifth lens having a convex image-side surface, and negative sixth lens, which are in this order from an object side. In the imaging lens, all of the lenses constituting the lens system are single lenses, which are not cemented lenses, and a stop is arranged closer to the object side than an image-side surface of the fourth lens is arranged. When a refractive index of a material of the third lens for d-line is Nd3, the following formula (1-1) is satisfied: Nd3<1.65 (1-1).
Claims19
An imaging lens, consisting of:
- a negative first lens having a concave image-side surface;
- a positive second lens;
- a negative third lens;
- a positive fourth lens;
- a positive fifth lens having a convex image-side surface;
- and
- a negative sixth lens, which are in this order from an object side,
- wherein all of the lenses constituting the lens system are single lenses, which are not cemented lenses,
- wherein a stop is arranged closer to the object side than an image-side surface of the fourth lens is arranged,
- wherein when a refractive index of a material of the third lens for d-line is Nd3, the following formula (1-1) is satisfied:
- Nd3<1.65 (1-1), and
- wherein the Abbe number of the material of the third lens for d-line is less than or equal to 30.2.
An imaging lens, consisting of:
- a negative first lens having a concave image-side surface;
- a positive second lens;
- a negative third lens;
- a positive fourth lens;
- a positive fifth lens having a convex image-side surface;
- and
- a negative sixth lens, which are in this order from an object side,
- wherein when a refractive index of a material of the third lens for d-line is Nd3, the following formula (1-1) is satisfied:
- Nd3<1.65 (1-1), and
- wherein the Abbe number of the material of the third lens for d-line is less than or equal to 30.2.
Dependencies are inferred from the claim text.