Lens assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorYuan Fan Liang
Life of this patent
Estimating the term…
Abstract
A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along an optical axis in order from an object side to an image side. The first lens is a meniscus lens with positive refractive power, and an object-side surface of the first lens is convex. The second lens is a lens with positive refractive power, and an object-side surface of the second lens is convex. The third lens is a lens with negative refractive power, and an object-side surface and an image-side surface of the third lens are concave. The fourth lens is a meniscus lens with negative refractive power. The fifth lens is a lens with positive refractive power, and an object-side surface of the fifth lens is convex.
Claims20
A lens assembly comprising, in order from an object side to an image side along an optical axis:
- a first lens, which is a meniscus lens with positive refractive power;
- a second lens, which is a lens with positive refractive power, in which an object-side surface of the second lens is convex;
- a third lens, which is a lens with negative refractive power, in which an object-side surface of the third lens is concave and an image-side surface of the third lens is concave;
- a fourth lens, which is a meniscus lens with negative refractive power;
- and
- a fifth lens, which is a lens with positive refractive power, in which an object-side surface of the fifth lens is convex,
- wherein the lens assembly satisfies the following condition:
- 0
- <
- TTL
- EFL
- <
- 1
- ,
- wherein TTL is a total length of the lens assembly and EFL is an effective focal length of the lens assembly.
A lens assembly comprising, in order from an object side to an image side along an optical axis:
- a first lens, which is a meniscus lens with positive refractive power;
- a second lens, which is a lens with positive refractive power, in which an object-side surface of the second lens is convex;
- a third lens, which a lens with negative refractive power, in which an object-side surface of the third lens is concave and an image-side surface of the third lens is concave;
- a fourth lens, which is a meniscus lens with negative refractive power;
- and
- a fifth lens, which is a lens with positive refractive power, in which an object-side surface of the fifth lens is convex,
- wherein the lens assembly satisfies the following condition:
- 0.2
- <
-
- f
- 1
- EFL
-
- <
- 1
- ,
- wherein f1 is a focal length of the first lens and EFL is an effective focal length of the lens assembly.
Dependencies are inferred from the claim text.