# US 2025/0147280 A1 · Imaging lens system

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- Number: US 2025/0147280 A1
- Document ID: US20250147280A1
- Status: Published application
- Kind: A1
- Application number: 19/015,389
- Filed: 2025-01-09
- Published: 2025-05-08
- Earliest claimed: 2021-10-05
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Il Yong PARK; Jong Gi LEE; Dong Hyuk JANG; Han Ul YOUN
- Web page: https://patentgrep.com/patent/US20250147280A1

## CPC

- G02B 9/64: having more than six components
- G02B 13/0045: {having five or more lenses}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An imaging lens system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed from an object side. The fourth lens has negative refractive power and the fifth lens has negative refractive power, and a ratio (TTL/2ImgHT) between a distance (TTL) from an object-side surface of the first lens to an imaging plane and a diagonal length (2ImgHT) of the imaging plane is 0.6 or less.

## Claims

### Claim 1

An imaging lens system, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed from an object side toward an imaging plane,
wherein a radius of curvature of an image-side surface of the first lens is greater than a radius of curvature of an image-side surface of the fifth lens,
wherein a radius of curvature of an object-side surface of the second lens is greater than a radius of curvature of an image-side surface of the third lens, and
wherein −4.0<f2/f<−1.0 and 3.0<f3/f<6.0, where f is a focal length of the imaging lens system, f2 is a focal length of the second lens, and f3 is a focal length of the third lens.

### Claim 2 (depends on 1)

The imaging lens system of claim 1, wherein the first lens comprises a convex object-side surface.

### Claim 3 (depends on 1)

The imaging lens system of claim 1, wherein the second lens comprises a convex object-side surface.

### Claim 4 (depends on 1)

The imaging lens system of claim 1, wherein the third lens comprises a convex object-side surface.

### Claim 5 (depends on 1)

The imaging lens system of claim 1, wherein the fourth lens comprises a concave object-side surface.

### Claim 6 (depends on 1)

The imaging lens system of claim 1, wherein the sixth lens comprises a convex object-side surface.

### Claim 7 (depends on 1)

The imaging lens system of claim 1, wherein the seventh lens comprises a concave image-side surface.

### Claim 8

An imaging lens system, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed from an object side toward an imaging plane,
wherein the third lens comprises a convex image-side surface in a paraxial region,
wherein a radius of curvature of an image-side surface of the first lens is greater than a radius of curvature of an object-side surface of the second lens,
wherein a radius of curvature of the object-side surface of the second lens is greater than a radius of curvature of an image-side surface of the third lens,
wherein a radius of curvature of an object-side surface of the fifth lens is greater than a radius of curvature of the image-side surface of the third lens, and
wherein −5.0<f5/f<−1.0, where f is a focal length of the imaging lens system and f5 is a focal length of the fifth lens.

### Claim 9 (depends on 8)

The imaging lens system of claim 8, wherein the first lens comprises a concave image-side surface.

### Claim 10 (depends on 8)

The imaging lens system of claim 8, wherein the second lens comprises a concave image-side surface.

### Claim 11 (depends on 8)

The imaging lens system of claim 8, wherein the sixth lens comprises a convex object-side surface.

### Claim 12 (depends on 8)

The imaging lens system of claim 8, wherein the seventh lens comprises a concave image-side surface.