# US 2026/0093162 A1 · Optical imaging system

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- Number: US 2026/0093162 A1
- Document ID: US20260093162A1
- Status: Published application
- Kind: A1
- Application number: 19/411,358
- Filed: 2025-12-07
- Published: 2026-04-02
- Earliest claimed: 2022-11-09
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: You Jin JEONG; Jae Hyuk HUH; Byung Hyun KIM
- Web page: https://patentgrep.com/patent/US20260093162A1

## CPC

- G03B 17/17: with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
- G02B 9/12: having three components only
- G02B 13/0035: {having three lenses}
- G02B 13/0065: {having a beam-folding prism or mirror}
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging system includes a first lens, a second lens, a third lens, a reflective member, and an image sensor sequentially arranged from an object side. The reflective member includes at least two reflective surfaces to change a path of light passing through the first to third lenses and incident on the reflective member at least twice.

## Claims

### Claim 1

An optical imaging system comprising:
a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a refractive power, a reflective member comprising at least two reflective surfaces configured to change a path of light passing through the first to third lenses, and an image sensor sequentially disposed along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging surface of the image sensor,
wherein the optical imaging system has a total of three lenses having a refractive power,
a distance along the optical axis between the third lens and the reflective member is greater than a distance along the optical axis between the first lens and the second lens, and is also greater than a distance along the optical axis between the second lens and the third lens, and
0.1<LL/PL<0.4, where LL is a distance along the optical axis from an object-side surface of the first lens to an image-side surface of the third lens, and PL is a length of a path of the light in the reflective member.

### Claim 2 (depends on 1)

The optical imaging system of claim 1, wherein the reflective member is a parallelogram-shaped prism.

### Claim 3 (depends on 1)

The optical imaging system of claim 1, wherein 0.2<f1/f<0.8, where f1 is a focal length of the first lens, and f is a focal length of the optical imaging system.

### Claim 4 (depends on 1)

The optical imaging system of claim 1, wherein the object-side surface of the first lens is convex in a paraxial region thereof, and an image-side surface of the first lens is convex in a paraxial region thereof.

### Claim 5 (depends on 1)

The optical imaging system of claim 1, wherein an image-side surface of the second lens is concave in a paraxial region thereof, and the image-side surface of the third lens is concave in a paraxial region thereof.

### Claim 6 (depends on 1)

The optical imaging system of claim 1, wherein 50<v1<90 and 0≤v1−v2<56, where v1 is an Abbe number of the first lens, and v2 is an Abbe number of the second lens.

### Claim 7 (depends on 1)

The optical imaging system of claim 1, wherein −20<f2/f<−0.3, where f2 is a focal length of the second lens, and f is a focal length of the optical imaging system.

### Claim 8 (depends on 1)

The optical imaging system of claim 1, wherein −3.5<f3/f<6.2, where f3 is a focal length of the third lens, and f is a focal length of the optical imaging system.

### Claim 9 (depends on 1)

The optical imaging system of claim 1, wherein 0.80<PL/f≤0.98, where f is a focal length of the optical imaging system.

### Claim 10 (depends on 1)

The optical imaging system of claim 1, wherein an object-side surface of the second lens is concave in a paraxial region thereof, and the image-side surface of the third lens is concave in a paraxial region thereof.