Imaging lens and image pickup apparatus
AssigneeFUJIFILM Corporation
InventorYu KITAHARA
Life of this patent
Estimating the term…
Abstract
Disclosed is an imaging lens capable of improving weatherability, reducing performance degradation, and obtaining an optical performance excellent across a wide wavelength region from the visible wavelength region to the near-infrared wavelength region. An imaging lens for forming an image of visible and near-infrared light includes, in order from the object side: a front group that has a positive power; an aperture stop; and a rear group that has a negative power. In the imaging lens, the rear group includes a negative meniscus lens that is disposed closer to the object side and has a surface convex toward the object side, and a biconvex lens that is disposed closer to the image side. In addition, all the lenses constituting the imaging lens are single lenses.
Claims6
An imaging lens for forming an image of visible and near-infrared light, the imaging lens comprising, in order from an object side:
- a front group that has a positive power;
- a stop;
- and
- a rear group that has a negative power,
- wherein the rear group includes, in order from the object side,
- a negative meniscus lens that has a surface convex toward the object side, and
- a biconvex lens, and
- wherein all the lenses constituting the imaging lens are single lenses.
Dependencies are inferred from the claim text.