# US 12,222,472 B2 · Optical imaging system

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- Number: US 12,222,472 B2
- Document ID: US12222472B2
- Status: Granted
- Kind: B2
- Application number: 18/466,375
- Filed: 2023-09-13
- Published: 2023-12-28
- Granted: 2025-02-11
- Earliest claimed: 2015-10-13
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Yong Joo Jo
- Web page: https://patentgrep.com/patent/US12222472B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 5/005: {Diaphragms (for cameras G03B9/02)}
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- G02B 9/60: having five components only
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens includes a convex object-side surface and a concave image-side surface. The second lens includes a concave object-side surface and a concave image-side surface. The third lens includes a concave object-side surface. The fourth lens includes a concave object-side surface. The fifth lens includes a concave object-side surface and a concave image-side surface. The first to fifth lenses are sequentially disposed from an object side toward an imaging plane.

## Claims

### Claim 1

An optical imaging system comprising:
a first lens having positive refractive power;
a second lens having negative refractive power and a convex object-side surface;
a third lens having a refractive power;
a fourth lens having positive refractive power; and
a fifth lens having negative refractive power,
wherein the first to fifth lenses are sequentially disposed from an object side toward an imaging plane,
wherein R10>R4, where R10 is a radius of curvature of the image-side surface of the fifth lens and R4 is a radius of curvature of the image-side surface of the second lens,
wherein a distance from the image-side surface of the third lens to the object-side surface of the fourth lens is greater than a distance from an image-side surface of the fourth lens to the object-side surface of the fifth lens, and
wherein R3>R1 and R3>R2, where R3 is a radius of curvature of an object-side surface of the second lens, R1 is a radius of curvature of an object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens.

### Claim 2 (depends on 1)

The optical imaging system of claim 1, wherein the first lens has a concave image-side surface.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

The optical imaging system of claim 1, wherein the fourth lens has a convex image-side surface.

### Claim 5 (depends on 1)

The optical imaging system of claim 1, wherein the fifth lens has a concave image-side surface.

### Claim 6 (depends on 1)

The optical imaging system of claim 1, wherein the third lens has a refractive index greater than 1.60.

### Claim 7 (depends on 1)

The optical imaging system of claim 1, wherein
1.10<TTL/ImgH,
where TTL is a distance from an object-side surface of the first lens to the imaging plane and ImgH is a distance from a center of the imaging plane to a corner of the imaging plane.

### Claim 8

An optical imaging system comprising:
a first lens having positive refractive power;
a second lens having negative refractive power and a convex object-side surface;
a third lens having a refractive power;
a fourth lens having positive refractive power; and
a fifth lens having negative refractive power,
wherein the first to fifth lenses are sequentially disposed from an object side toward an imaging plane,
wherein a distance from the image-side surface of the third lens to the object-side surface of the fourth lens is greater than a thickness of the fourth lens, and the distance from the image-side surface of the third lens to the object-side surface of the fourth lens is greater than a distance from an image-side surface of the fourth lens to the object-side surface of the fifth lens,
wherein the second lens has a focal length of −6.0 mm to −4.0 mm, and
wherein R3>R1 and R3>R2, where R3 is a radius of curvature of an object-side surface of the second lens, R1 is a radius of curvature of an object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens.

### Claim 9 (depends on 8)

The optical imaging system of claim 8, wherein the first lens has a convex object-side surface.

### Claim 10 (depends on 8)

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

### Claim 11 (depends on 8)

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

### Claim 12 (depends on 8)

The optical imaging system of claim 8, wherein the third lens has a concave object-side surface.

### Claim 13 (depends on 8)

The optical imaging system of claim 8, wherein the fourth lens has a concave object-side surface.

### Claim 14 (depends on 8)

The optical imaging system of claim 8, wherein the fourth lens has a convex image-side surface.

### Claim 15 (depends on 8)

The optical imaging system of claim 8, wherein the fifth lens has a concave object-side surface.

### Claim 16 (depends on 8)

The optical imaging system of claim 8, wherein the fifth lens has a concave image-side surface.