Zoom lens and image pickup device having the same
AssigneeSamsung Electronics Co., Ltd.
InventorYoung-woo Park
Life of this patent
Estimating the term…
Abstract
A compact wide-angle zoom lens and an image pickup device having the same. The zoom lens includes a first lens group having a negative refractive power and a second lens group having a positive refractive power in an order from an object side to an image side, performs zooming by varying a distance between the first and second lens groups, and performs focusing by using a first lens closest to the object side in the second lens group.
Claims18
A zoom lens comprising a first lens group having a negative refractive power and a second lens group having a positive refractive power in an order from an object side to an image side, that performs zooming by varying a distance between the first and second lens groups, that performs focusing by using a first lens that is closest to the object side in the second lens group, and satisfying:
- 1.2
- ≤
- f
- II
- f
- W
- ·
- f
- T
- ≤
- 1.8
- and
- L
- T
- f
- W
- ·
- f
- T
- ≤
- 6.0
- ,
- where fW represents a total focal length at a wide-angle position, fT represents a total focal length at a telephoto position, fII represents a focal length of the second lens group, and LT represents an overall length of the zoom lens at the telephoto position.
An image pickup device comprising:
- a zoom lens;
- and
- an imaging device that receives an image formed by the zoom lens,
- wherein the zoom lens comprises a first lens group having a negative refractive power and a second lens group having a positive refractive power in an order from an object side to an image side, performs zooming by varying a distance between the first and second lens groups, performs focusing by using a first lens closest to the object side in the second lens group, and satisfies:
- 1.2
- ≤
- f
- II
- f
- W
- ·
- f
- T
- ≤
- 1.8
- and
- L
- T
- f
- W
- ·
- f
- T
- ≤
- 6.0
- ,
- where fW represents a total focal length at a wide-angle position, fT represents a total focal length at a telephoto position, fII represents a focal length of the second lens group, and LT represents an overall length of the zoom lens at the telephoto position.
Dependencies are inferred from the claim text.