Optical imaging lens
AssigneeCalin Technology Co., Ltd.
InventorsYi-Ling Yang, Shu-Chuan Hsu
Life of this patent
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Abstract
An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first lens having negative refractive power; a second lens; a third lens cemented with the second lens to form a first compound lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens; a sixth lens cemented with the fifth lens to form a second compound lens having positive refractive power; a seventh lens having positive refractive power. The optical imaging lens could provide a better optical performance of high image quality and low distortion.
Claims18
An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:
- a first lens having negative refractive power;
- a second lens, wherein an object-side surface of the second lens toward the object side is a concave surface, and an image-side surface of the second lens toward the image side is a convex surface;
- a third lens, wherein an object-side surface of the third lens toward the object side is a concave surface, and an image-side surface of the third lens toward the image side is a convex surface;
- the object-side surface of the third lens and the image-side surface of the second lens are cemented to form a first compound lens having negative refractive power;
- a fourth lens having positive refractive power;
- a fifth lens;
- a sixth lens cemented with the fifth lens to form a second compound lens having positive refractive power;
- and
- a seventh lens having positive refractive power;
- wherein an object-side surface of the seventh lens is a concave surface.
An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:
- a first lens;
- a second lens;
- a third lens;
- a fourth lens;
- a fifth lens;
- a sixth lens;
- and
- a seventh lens;
- wherein the optical imaging lens satisfies:
- 2.5≤(f1+f2+f3+f4+f5+f6+f7)/f≤13.5, wherein f is a focal length of the optical imaging lens;
- f1 is a focal length of the first lens;
- f2 is a focal length of the second lens;
- f3 is a focal length of the third lens;
- f4 is a focal length of the fourth lens;
- f5 is a focal length of the fifth lens;
- f6 is a focal length of the sixth lens;
- f7 is a focal length of the seventh lens;
- wherein the sixth lens and the fifth lens are cemented to form a second compound lens;
- the optical imaging lens satisfies:
- 4.5≤f56/f≤7.5, wherein f56 is a focal length of the second compound lens.
Dependencies are inferred from the claim text.