Six-piece wide-angle lens module
AssigneeKinko Optical Co., Ltd.
InventorSze-Ying Chen
Life of this patent
Estimating the term…
Abstract
A six-piece wide-angle lens module includes, from an object side to an image side, a first lens group, an aperture and a second lens group. The first lens group consists of a negative first lens, a negative second lens and a positive third lens, each lens having an object side surface facing the object side and an image side surface facing the image side, the first lens is a meniscus lens having a convex object side surface, the second lens has a concave image side surface, the third lens has a convex object side surface. The second lens group consists of a positive fourth lens, a negative fifth lens and a positive sixth lens, the fourth lens is a biconvex lens, the fifth lens has a concave image side surface, the sixth lens has a convex object side surface, the second lens group has a positive focal length.
Claims17
A six-piece wide-angle lens module, comprising, in a sequence from an object side to an image side, a first lens group, substantially consisting of a first lens having a negative refractive power, a second lens having a negative refractive power and a third lens having a positive refractive power, each lens having an object side surface facing the object side and an image side surface facing the image side, the first lens being a meniscus lens having a convex object side surface, the second lens having a concave image side surface, the third lens having a convex object side surface;
- an aperture;
- and
- a second lens group, substantially consisting of a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a positive refractive power, each lens having an object side surface facing the object side and an image side surface facing the image side, the fourth lens being a biconvex lens, the fifth lens having a concave image side surface, the sixth lens having a convex object side surface, and the second lens group having a positive focal length;
- wherein the six-piece wide-angle lens module satisfies the following relationship:
- 0.65
- ≤
-
- ff
- fr
-
- ≤
- 8.81
- ;
- 0.07
- ≤
-
- f
-
-
- 5
- V
-
-
- 5
-
- +
- f
-
-
- 6
- V
-
-
- 6
- f
- ≤
- 0.15
- ;
- wherein ff is a focal length of the first lens group, fr is a focal length of the second lens group, f is a focal length of the six-piece wide-angle lens module, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, V5 is an Abbe number of the fifth lens, and V6 is an Abbe number of the sixth lens.
Dependencies are inferred from the claim text.