Back to results
US 2026/0219477 A1Published application
Optical system, lens module, and electronic device
AssigneeHuawei Technologies Co., Ltd.
InventorsSichen LONG, Kaiyuan ZHANG, Ranran LU
Life of this patent
Estimating the term…
Abstract
The optical system includes a stop, a first lens having a positive focal power. A value of N is 7 or 8. A second lens has a positive focal power. An object side surface that is of the second lens and that is near the optical axis is a convex surface, and an image side surface that is of the second lens and that is near the optical axis is a concave surface. A third lens has a negative focal power. An object side surface that is of the third lens and that is near the optical axis is a concave surface, and an image side surface that is of the third lens and that is near the optical axis is a convex surface. The optical system further satisfies: −4≤SAGn2/CTn≤−2, 1≤SPn−1/(CTn−1+CTn)≤1.8, and (2×IMH/TTL)2/FNO≥1.5.
Claims21
An optical system, comprising following sequentially spaced apart along an optical axis from an object side to an image side:
- a stop;
- a first lens having a positive focal power;
- a second lens, . . . , and an (N−2)th lens, wherein each of the second lens to the (N−2)th lens has a respective focal power, and a value of N is 7 or 8;
- an (N−1)th lens, having a positive focal power, wherein an object side surface that is of the (N−1)th lens and that is near the optical axis is a convex surface, an image side surface that is of the (N−1)th lens and that is near the optical axis is a concave surface, and at least one of the object side surface and the image side surface of the (N−1)th lens has an inflection surface;
- and
- an Nth lens, having a negative focal power, wherein an object side surface that is of the Nth lens and that is near the optical axis is a concave surface, an image side surface that is of the Nth lens and that is near the optical axis is a convex surface, and at least one of the object side surface and the image side surface of the Nth lens has an inflection surface, wherein
- the optical system satisfies:
- -
- 4
- ≤
- SAGn
- 2
- /
- CT
- n
- ≤
- -
- 2
- ;
- 1
- ≤
- S
-
- P
- n
- -
- 1
- /
- (
- CT
- n
- -
- 1
- +
- C
-
- T
- n
- )
- ≤
- 1.8
- ;
- and
- (
- 2
- ×
- IMH
- /
- TTL
- )
- 2
- /
- FNO
- ≥
- 1.5
- ,
- wherein
- SAGn2 is a maximum sagittal height of the image side surface of the Nth lens, SPn−1 is a thickness of an air gap between the (N−1)th lens and the Nth lens along an optical axis direction, CTn is a center thickness of the Nth lens along the optical axis direction, CTn−1 is a center thickness of the (N−1)th lens along the optical axis direction, IMH is a half-image height of the optical system, TTL is a distance from an object side surface of the first lens to an imaging plane along the optical axis direction, and FNO is an F-number of the optical system.
55 more elements
14-15. (canceled)
An electronic device, comprising:
- a lens module comprising:
- an optical system comprising:
- a stop;
- a first lens, having positive focal power;
- a second lens, . . . , and an (N−2)th lens, wherein each of the second lens to the (N−2)th lens has focal power, and a value of N is 7 or 8;
- an (N−1)th lens, having positive focal power, wherein an object side surface that is of the (N−1)th lens and that is near the optical axis is a convex surface, an image side surface that is of the (N−1)th lens and that is near the optical axis is a concave surface, and at least one of the object side surface and the image side surface of the (N−1)th lens has an inflection surface;
- and
- an Nth lens, having negative focal power, wherein an object side surface that is of the Nth lens and that is near the optical axis is a concave surface, an image side surface that is of the Nth lens and that is near the optical axis is a convex surface, and at least one of the object side surface and the image side surface of the Nth lens has an inflection surface, wherein
- the optical system satisfies following conditions:
- -
- 4
- ≤
- SAGn
- 2
- /
- CT
- n
- ≤
- -
- 2
- ;
- 1
- ≤
- S
-
- P
- n
- -
- 1
- /
- (
- CT
- n
- -
- 1
- +
- C
-
- T
- n
- )
- ≤
- 1.8
- ;
- and
- (
- 2
- ×
- IMH
- /
- TTL
- )
- 2
- /
- FNO
- ≥
- 1.5
- ,
- wherein
- SAGn2 is a maximum sagittal height of the image side surface of the Nth lens, SPn−1 is a thickness of an air gap between the (N−1)th lens and the Nth lens along an optical axis direction, CTn is a center thickness of the Nth lens along the optical axis direction, CTn−1 is a center thickness of the (N−1)th lens along the optical axis direction, IMH is a half-image height of the optical system, TTL is a distance from an object side surface of the first lens to an imaging plane along the optical axis direction, and FNO is an F-number of the optical system;
- and
- a photosensitive element, wherein the optical system and the photosensitive element are sequentially disposed along an optical axis from an object side to an image side.
59 more elements
An electronic device, comprising:
- a lens module comprising:
- an optical system comprising:
- a stop;
- a first lens, having positive focal power;
- a second lens, having positive focal power, wherein an object side surface that is of the second lens and that is near the optical axis is a convex surface, an image side surface that is of the second lens and that is near the optical axis is a concave surface, and at least one of the object side surface and the image side surface of the second lens has an inflection surface;
- and
- a third lens, having negative focal power, wherein an object side surface that is of the third lens and that is near the optical axis is a concave surface, an image side surface that is of the third lens and that is near the optical axis is a convex surface, and at least one of the object side surface and the image side surface of the third lens has an inflection surface, wherein the second lens and the third lens are two adjacent lenses, the third lens is a lens closest to the photosensitive element;
- the optical system satisfies:
- -
- 4
- ≤
- SAGn
- 2
- /
- CT
- n
- ≤
- -
- 2
- ;
- 1
- ≤
- S
-
- P
- n
- -
- 1
- /
- (
- CT
- n
- -
- 1
- +
- C
-
- T
- n
- )
- ≤
- 1.8
- ;
- and
- (
- 2
- ×
- IMH
- /
- TTL
- )
- 2
- /
- FNO
- ≥
- 1.5
- ,
- wherein
- SAGn2 is a maximum sagittal height of the image side surface of the third lens, SPn−1 is a thickness of an air gap between the second lens and the third lens along an optical axis direction, CTn is a center thickness of the third lens along the optical axis direction, CTn−1 is a center thickness of the second lens along the optical axis direction, IMH is a half-image height of the optical system, TTL is a distance from an object side surface of the first lens to an imaging plane along the optical axis direction, and FNO is an F-number of the optical system;
- a photosensitive element, wherein the optical system and the photosensitive element are sequentially disposed along an optical axis from an object side to an image side.
57 more elements
Dependencies are inferred from the claim text.