Lens assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorsPo-Yuan Shih, Bo-Yan Chen, Hsi-Ling Chang
Life of this patent
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Abstract
A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, all of which are arranged in order from an object side to an image side along an optical axis. The first lens is with positive refractive power and includes a convex surface facing the object side. The second lens is with negative refractive power and includes a concave surface facing the image side. The third lens is with refractive power and includes a convex surface facing the image side. The fourth, fifth, and sixth lenses are with refractive power. The lens assembly satisfies: 2 mm<f5+f6<35 mm, wherein f5 is an effective focal length of the fifth lens and f6 is an effective focal length of the sixth lens.
Claims20
A lens assembly comprising:
- a first lens which is with positive refractive power and comprises a convex surface facing an object side;
- a second lens which is with negative refractive power and comprises a concave surface facing an image side;
- a third lens which is with refractive power and comprises a convex surface in a paraxial region facing the image side;
- a fourth lens which is with refractive power;
- a fifth lens which is with refractive power;
- and
- a sixth lens which is with refractive power;
- wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to the image side along an optical axis;
- wherein the lens assembly satisfies:
- 2 mm<f5+f6<35 mm,
- wherein f5 is an effective focal length of the fifth lens and f6 is an effective focal length of the sixth lens.
A lens assembly comprising:
- a first lens which is with positive refractive power and comprises a convex surface facing an object side;
- a second lens which is with negative refractive power and comprises a concave surface facing an image side;
- a third lens which is with refractive power and comprises a convex surface facing the image side;
- a fourth lens which is with refractive power;
- a fifth lens which is with refractive power;
- and
- a sixth lens which is with refractive power;
- wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to the image side along an optical axis;
- wherein the lens assembly satisfies:
- f1+f2<−1 mm,
- wherein f1 is an effective focal length of the first lens and f2 is an effective focal length of the second lens.
A lens assembly comprising:
- a first lens which is with positive refractive power and comprises a convex surface facing an object side;
- a second lens which is with negative refractive power and comprises a concave surface facing an image side;
- a third lens which is with refractive power and comprises a convex surface facing the image side;
- a fourth lens which is with refractive power;
- a fifth lens which is with refractive power;
- a sixth lens which is with refractive power;
- and
- a stop;
- wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to the image side along an optical axis;
- wherein the stop is disposed between the object side and the third lens;
- wherein the lens assembly satisfies:
- −25 mm<f2+f4<−1.5 mm,
- wherein f2 is an effective focal length of the second lens and f4 is an effective focal length of the fourth lens.
Dependencies are inferred from the claim text.