CN-224216938-U - Imaging lens system

Abstract

The imaging lens system includes a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power and a convex image side in a paraxial region thereof, a fifth lens having a refractive power, a sixth lens having a refractive power, a seventh lens having a refractive power and a convex image side in a paraxial region thereof, and an eighth lens having a refractive power, a convex object side in a paraxial region thereof, and an image side with a inflection point, wherein the first to eighth lenses are sequentially arranged along an optical axis of the imaging lens system from an object side of the imaging lens system toward the imaging surface of the imaging lens system, and-5.0 < f6/f <2.0, wherein f6 is a focal length of the sixth lens, and f is a focal length of the imaging lens system.

Inventors

• LI ZHIXIU
• ZHAO YONGZHU

Assignees

• 三星电机株式会社

Dates

Publication Date

20260508

Application Date

20250526

Priority Date

20240722

Claims (20)

1. 1. An imaging lens system, wherein the imaging lens system comprises: A first lens having a positive refractive power; A second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a refractive power and a convex image side in a paraxial region thereof; a fifth lens having a refractive power; A sixth lens having a refractive power; A seventh lens having a refractive power and a convex image side in a paraxial region thereof; An eighth lens having a refractive power, a convex object side surface in a paraxial region thereof, and an image side surface with a inflection point, Wherein the first lens to the eighth lens are arranged in order along an optical axis of the imaging lens system from an object side of the imaging lens system toward an imaging surface of the imaging lens system, and The imaging lens system satisfies the following conditional expression: -5.0<f6/f<2.0 Where f6 is the focal length of the sixth lens and f is the focal length of the imaging lens system.
2. 2. The imaging lens system of claim 1 wherein said first lens has a convex object side in a paraxial region thereof.
3. 3. The imaging lens system of claim 1 wherein said second lens has a convex object side in a paraxial region thereof.
4. 4. The imaging lens system of claim 1 wherein said third lens has a convex object side in a paraxial region thereof.
5. 5. The imaging lens system of claim 1 wherein said fourth lens has a concave object-side surface in a paraxial region thereof.
6. 6. The imaging lens system of claim 1 wherein said fifth lens has a convex object side in its paraxial region.
7. 7. The imaging lens system of claim 1 wherein said sixth lens has a convex object side in its paraxial region.
8. 8. The imaging lens system of claim 1 wherein said sixth lens has a convex image side in a paraxial region thereof.
9. 9. The imaging lens system of claim 1 wherein said seventh lens has a concave object side in a paraxial region thereof.
10. 10. The imaging lens system of claim 1 wherein said image side of said eighth lens is concave in its paraxial region.
11. 11. An imaging lens system, wherein the imaging lens system comprises: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order along an optical axis of the imaging lens system from an object side of the imaging lens system toward an imaging surface of the imaging lens system, Wherein two adjacent lenses among the first to eighth lenses are bonded to each other, and The imaging lens system satisfies the following conditional expression: 0.36<sumAG/f<0.50 Wherein sumAG is the sum of the air gaps along the optical axis between the first lens to the eighth lens, and f is the focal length of the imaging lens system.
12. 12. The imaging lens system of claim 11 wherein said first lens has a convex object side in a paraxial region thereof.
13. 13. The imaging lens system of claim 11 wherein said second lens has a convex object side in a paraxial region thereof.
14. 14. The imaging lens system of claim 11 wherein said third lens has a convex object side in a paraxial region thereof.
15. 15. The imaging lens system of claim 11 wherein said fourth lens has a concave object-side surface in a paraxial region thereof.
16. 16. The imaging lens system of claim 11 wherein said fifth lens has a convex object side in a paraxial region thereof.
17. 17. The imaging lens system of claim 11 wherein said sixth lens has a convex object side in its paraxial region.
18. 18. The imaging lens system of claim 11 wherein said sixth lens has a convex image side in a paraxial region thereof.
19. 19. The imaging lens system of claim 11 wherein said seventh lens has a concave object-side surface in a paraxial region thereof.
20. 20. The imaging lens system of claim 11 wherein said seventh lens has a convex image side in a paraxial region thereof.

Description

Imaging lens system Cross Reference to Related Applications The present application claims the priority rights of korean patent application No. 10-2024-0096679 filed at korean intellectual property office on month 7 and 22 of 2024, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field The present disclosure relates to imaging lens systems with reduced chromatic aberration. Background The camera module may be mounted on an electronic device to capture still images or record moving images. For example, the camera module may be mounted on a mobile phone, laptop computer, game console, or other electronic device. As the performance of electronic devices including camera modules increases, the demand for camera modules having high performance, high resolution, and small size increases. For example, the image sensor of the camera module is gradually becoming larger in order to realize a high-resolution camera module. However, the enlargement of the image sensor not only hinders miniaturization of the camera module but also increases aberration of the imaging lens system of the camera module. Disclosure of utility model 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 imaging lens system includes a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power and a convex image side in a paraxial region thereof, a fifth lens having a refractive power, a sixth lens having a refractive power, a seventh lens having a refractive power and a convex image side in a paraxial region thereof, and an eighth lens having a refractive power, a convex object side in a paraxial region thereof, and an image side with a back curve, wherein the first lens to the eighth lens are sequentially arranged along an optical axis of the imaging lens system from an object side of the imaging lens system toward the imaging surface of the imaging lens system, and the imaging lens system satisfies a conditional expression-5.0 < f6/f <2.0, where f6 is a focal length of the sixth lens, and f is a focal length of the imaging lens system. The first lens may have a convex object side in its paraxial region. The second lens may have a convex object side in its paraxial region. The third lens may have a convex object side in its paraxial region. The fourth lens may have a concave object-side surface in its paraxial region. The fifth lens may have a convex object side in its paraxial region. The sixth lens may have a convex object side in its paraxial region. The sixth lens may have a convex image side in its paraxial region. The seventh lens may have a concave object side surface in its paraxial region. The image side surface of the eighth lens may be concave in its paraxial region. In another general aspect, an imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens that are sequentially arranged along an optical axis of the imaging lens system from an object side of the imaging lens system toward an imaging plane of the imaging lens system, wherein two adjacent lenses among the first lens to the eighth lens are joined to each other, and the imaging lens system satisfies a conditional expression 0.36< sumag/f <0.50, wherein sumAG is a sum of air gaps along the optical axis between the first lens to the eighth lens, and f is a focal length of the imaging lens system. The first lens may have a convex object side in its paraxial region. The second lens may have a convex object side in its paraxial region. The third lens may have a convex object side in its paraxial region. The fourth lens may have a concave object-side surface in its paraxial region. The fifth lens may have a convex object side in its paraxial region. The sixth lens may have a convex object side in its paraxial region. The sixth lens may have a convex image side in its paraxial region. The seventh lens may have a concave object side surface in its paraxial region. The seventh lens may have a convex image side in its paraxial region. Other features and aspects will be apparent from the accompanying drawings and from the detailed description that follows. Drawings Fig. 1 is a configuration diagram of an imaging lens system according to a first embodiment of the present disclosure. Fig. 2 shows an aberration curve of the imaging lens system shown in fig. 1. Fig. 3 is a configuration diagram of an imaging lens system according to a second embodiment of the present disclosure. Fig. 4 shows an aberration curve of the imagi