Zoom lens and electronic apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorHiroyuki Hagiwara
Life of this patent
Estimating the term…
Abstract
A zoom lens is described. The zoom lens includes, in an order from an object side: a first lens group that comprises at least two negative lenses and a single positive lens, the first lens group having a negative refractive power; a second lens group that comprises a plurality of lenses, at least one correction lens of the second lens group being movable in a surface that crosses an optical axis to perform image-shaking correction, the second lens group having a positive refractive power; a third lens group that comprises a single negative lens, the third lens group having a negative refractive power; and a fourth lens group having a positive refractive power.
Claims21
A zoom lens comprising, in an order from an object side:
- a first lens group that comprises at least two negative lenses and a single positive lens, the first lens group having a negative refractive power;
- a second lens group that comprises a plurality of lenses, at least one correction lens of the second lens group being movable in a surface that crosses an optical axis to perform image-shaking correction, the second lens group having a positive refractive power;
- a third lens group that comprises a single negative lens, the third lens group having a negative refractive power;
- and
- a fourth lens group having a positive refractive power,
- wherein intervals between the first, second, third, and fourth lens groups are changed during zooming from a wide angle position to a telephoto position, and each of the first, second, third, and fourth lens groups moves during zooming from a wide angle position to a telephoto position,
- and the zoom lens satisfies the following conditions:
- 0.05<M4/M2<0.8, and
- 0.8<f4/ft<5.0,
- where M2 denotes an amount of movement of the second lens group in a direction toward the optical axis during zooming from the wide angle position to the telephoto position, M4 denotes an amount of movement of the fourth lens group in a direction toward the optical axis during zooming from the wide angle position to the telephoto position, f4 denotes a synthesis focal length of the fourth lens group, and ft denotes an overall focal length in the telephoto position.
An electronic apparatus comprising:
- a zoom lens;
- and
- a solid-state imaging device that captures an image formed by the zoom lens;
- wherein the zoom lens comprises, in an order from an object side:
- a first lens group that comprises at least two negative lenses and a single positive lens, the first lens group having a negative refractive power;
- a second lens group that comprises a plurality of lenses, at least one correction lens of the second lens group being movable in a surface that crosses an optical axis to perform image-shaking correction, the second lens group having a positive refractive power;
- a third lens group that comprises a single negative lens, the third lens group having a negative refractive power;
- and
- a fourth lens group having a positive refractive power;
- wherein intervals between the first, second, third, and fourth lens groups are changed during zooming from a wide angle position to a telephoto position, and each of the first, second, third, and fourth lens group moves during zooming from a wide angle position to a telephoto position,
- and the zoom lens satisfies the following conditions:
- 0.05<M4/M2<0.8, and
- 0.8<f4/ft<5.0,
- where M2 denotes an amount of movement of the second lens group in a direction toward the optical axis during zooming from the wide angle position to the telephoto position, M4 denotes an amount of movement of the fourth lens group in a direction toward the optical axis during zooming from the wide angle position to the telephoto position, f4 denotes a synthesis focal length of the fourth lens group, and ft denotes an overall focal length in the telephoto position.
Dependencies are inferred from the claim text.