Imaging lens and imaging apparatus
AssigneeFujinon Corporation
InventorMasao Mori
Life of this patent
Estimating the term…
Abstract
An imaging lens comprises, in order arranged from an object side: a first lens of a negative meniscus lens which is curved to be convex towards an object; a second lens of a positive lens which is curbed to be convex on an object side surface thereof; a diaphragm; a third lens which is curved to be convex towards an image; a fourth lens having a positive refractive power in the vicinity of an optical axis; and a fifth lens which is curved to be concave towards the image in the vicinity of the optical axis while being curved to convex towards the image along a circumferential edge portion on an image side surface thereof.
Claims27
An imaging lens comprising, in order arranged from an object side:
- a first lens having a negative meniscus shape with a convex face directed to the object side thereof;
- a second lens having a positive shape with a convex face directed to the object side thereof;
- a diaphragm;
- a third lens with a convex face directed to an image;
- a fourth lens having a positive refractive power near an optical axis;
- and
- a fifth lens with a concave face directed to the image near the optical axis while with a convex face directed to the image towards its periphery on an image side surface thereof, wherein the imaging lens excludes between the first lens and the fifth lens, any other lens than the second to fourth lens.
An imaging lens comprising, in order arranged from an object side;
- a first lens having a negative meniscus shape with a convex face directed to the object side thereof;
- a second lens having a positive shape with a convex face directed to the object side thereof;
- a third lens with a convex face directed to an image;
- a fourth lens having a positive refractive power near an optical axis;
- and
- a fifth lens with a concave face directed to the image near the optical axis while with a convex face directed to the image towards its periphery on an image side surface thereof, wherein the imaging lens excludes between the first lens and the fifth lens, any other lens than the second to fourth lens.
Dependencies are inferred from the claim text.