CN-122018120-A - Optical imaging system

Abstract

The optical imaging system includes a first lens group including two or more lenses, and a second lens group including two or more lenses. The first lens group and the second lens group are arranged in order from the object side, and the second lens group is configured to be movable in the optical axis direction. 0.8 < TTL/f < 1.2. Here, TTL is a distance from an object side surface to an imaging surface of the foremost lens of the first lens group, and f is a focal length of the optical imaging system.

Inventors

• JIN BINGXIAN
• LIN TAIYUAN
• ZHAO YONGZHU

Assignees

• 三星电机株式会社

Dates

Publication Date

20260512

Application Date

20220916

Priority Date

20211129

Claims (12)

1. 1. An optical imaging system, comprising: a first lens having a positive refractive power and a convex object side; a second lens having a refractive power; a third lens having a positive refractive power; A fourth lens having a refractive power; a fifth lens having refractive power, and A sixth lens having a refractive power; wherein the first lens to the sixth lens are arranged in order from an object side, Wherein the optical imaging system has six lenses in total, and Wherein 0.32 < f3/f < 0.82, where f is the focal length of the optical imaging system, and f3 is the focal length of the third lens.
2. 2. The optical imaging system of claim 1, wherein the second lens has a convex object side.
3. 3. The optical imaging system of claim 1, wherein the third lens has a convex image side.
4. 4. The optical imaging system of claim 1, wherein the fourth lens has a concave object-side surface.
5. 5. The optical imaging system of claim 1, wherein the fifth lens has a convex image side.
6. 6. The optical imaging system of claim 1, wherein the sixth lens has a concave image side.
7. 7. An optical imaging system, comprising: a first lens having a positive refractive power and a convex object side; a second lens having a refractive power; a third lens having a positive refractive power; A fourth lens having a refractive power; a fifth lens having refractive power, and A sixth lens having a refractive power; wherein the first lens to the sixth lens are arranged in order from an object side, Wherein the optical imaging system has six lenses in total, Wherein 0.23 < BFL/f < 0.46 and-4.0 < (r1+r2)/(R1-R2) < -0.60, where f is the focal length of the optical imaging system, BFL is the distance from the image side to the imaging plane of the sixth lens, R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens.
8. 8. The optical imaging system of claim 7, wherein the second lens has a convex object side.
9. 9. The optical imaging system of claim 7, wherein the third lens has a convex object side.
10. 10. The optical imaging system of claim 7, wherein the fourth lens has a concave image side.
11. 11. The optical imaging system of claim 7, wherein the fifth lens has a convex image side.
12. 12. The optical imaging system of claim 7, wherein the sixth lens has a concave image side.

Description

Optical imaging system Cross Reference to Related Applications The present application claims the benefit of priority from korean patent application No. 10-2021-0167234 filed in the korean intellectual property office on day 11 and 29 of 2021, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field The present disclosure relates to an optical imaging system configured to enable macroscopic photography. Background The mobile terminal may include a plurality of camera modules. For example, the mobile terminal may include a first camera module mounted on a front surface of the terminal body and a second camera module mounted on a rear surface of the terminal body. The first camera module and the second camera module may have different optical characteristics. For example, the first camera module may include a wide angle optical imaging system to enable video calls and self-photographing by a user of the mobile terminal, and the second camera module may include an optical imaging system having a relatively long focal length to enable capturing images of objects located at long or intermediate distances. Therefore, it is difficult to capture images of objects located at intermediate distances and long distances using the first camera module of the mobile terminal, and it is difficult to capture images of objects located at short distances or ultra-short distances using the second camera module. The above information is presented merely as background information to aid in the understanding of the present disclosure. No determination is made, nor an assertion is made, as to whether any of the above may be used as prior art with respect to the present disclosure. Disclosure of Invention This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. In one general aspect, an optical imaging system includes a first lens group including two or more lenses and a second lens group including two or more lenses. The first lens group and the second lens group are arranged in order from the object side, the second lens group is configured to be movable in the optical axis direction, and 0.8 < TTL/f < 1.2, where TTL is a distance from an object side face to an imaging face of a foremost lens of the first lens group, and f is a focal length of the optical imaging system. The |fg1/fg2| may be greater than 0.7 and less than 1.4, where fG1 is the focal length of the first lens group and fG2 is the focal length of the second lens group. The first lens group may include a first lens, a second lens, and a third lens arranged in order from the object side. The first lens may have a positive refractive power, the second lens may have a negative refractive power, and the third lens may have a positive refractive power. F3/f may be greater than 0.32 and less than 0.82, where f3 is the focal length of the third lens. The image side of the third lens may be convex. The second lens group may include a fourth lens, a fifth lens, and a sixth lens arranged in order from the object side. Two of the fourth lens to the sixth lens may have negative refractive power. TTL/IMG HT may be greater than 4.0 and less than 7.0, where IMG HT is the height of the imaging plane. In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side, an image side of the third lens is convex, and wherein 0.8 < TTL/f < 1.2, 0.32 < f3/f < 0.82, and-1.0 < R1/R4 < 1.0, where TTL is a distance from the object side of the first lens to the imaging surface, f is a focal length of the optical imaging system, f3 is a focal length of the third lens, R1 is a radius of curvature of the object side of the first lens, and R4 is a radius of curvature of the image side of the second lens. The image side of the second lens may be concave. The image side of the fifth lens may be convex. The object side surface of the sixth lens may be concave. The fourth lens may have positive refractive power. The fifth lens may have a negative refractive power. BFL/f may be greater than 0.23 and less than 0.46, where BFL is the distance from the image side of the sixth lens to the imaging plane. In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that are sequentially arranged from an object side and are divided into a first lens group and a second lens group, each of the first lens group and the second lens group having two or more lenses, wherein the second lens group is disposed toward an image side of the first lens group and is configured to be mova