# US 10,310,237 B2 · Optical imaging system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,310,237 B2
- Document ID: US10310237B2
- Status: Granted
- Kind: B2
- Application number: 16/054,167
- Filed: 2018-08-03
- Published: 2018-11-29
- Granted: 2019-06-04
- 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/US10310237B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/60: having five components only
- G02B 27/0075: {with means for altering, e.g. increasing, the depth of field or depth of focus}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging system includes a first lens having a positive refractive power, an object-side surface wherein an object-side surface of the first lens is convex and an image-side surface of the first lens is concave, a second lens having a negative refractive power, wherein an image-side surface of the second lens is concave, a third lens having a negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power, wherein 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 comprising a positive refractive power, wherein an object-side surface of the first lens is convex;
a second lens comprising a negative refractive power, wherein an image-side surface of the second lens is concave;
a third lens comprising refractive power, wherein an object-side surface of the third lens is convex;
a fourth lens comprising refractive power, wherein an object-side surface of the fourth lens is concave; and
a fifth lens comprising refractive power, wherein an object-side surface of the fifth lens is concave and an image-side surface of the fifth lens is convex in a paraxial portion,
wherein the first to fifth lenses are sequentially disposed from an object side of the optical imaging system, towards an imaging plane
where 0.70<TTL/f<1.1, in which TTL is a distance of the object-side surface of the first lens to the imaging plane, and f is an overall focal length of the optical imaging system, and
a focal length f1 of the first lens is in a range of 2.50 to 3.00.

### Claim 2 (depends on 1)

The optical imaging system of claim 1, wherein an image-side surface of the third lens is concave.

### Claim 3 (depends on 1)

The optical imaging system of claim 1, where 20<FOV<35, in which FOV is a half of a field of view of the optical imaging system.

### Claim 4 (depends on 1)

The optical imaging system of claim 1, where 0.16<R1/f<2.0, in which R1 is a radius of curvature of the object-side surface of the first lens, and f is an overall focal length of the optical imaging system.

### Claim 5 (depends on 1)

The optical imaging system of claim 1, wherein one of the first through fifth lenses has a meniscus shape.

### Claim 6 (depends on 1)

The optical imaging system of claim 1, wherein one of the first through fifth lenses has an aspherical shape.

### Claim 7 (depends on 1)

The optical imaging system of claim 1, where 1.10<TTL/ImgH, in which TTL is a distance of the object-side surface of the first lens to the imaging plane, and ImgH is ½ of a diagonal length of the imaging plane.

### Claim 8 (depends on 1)

The optical imaging system of claim 1, further comprising:
a stop located adjacent to the object-side surface of the first lens.