US-12625349-B2 - Optical imaging lens

US12625349B2US 12625349 B2US12625349 B2US 12625349B2US-12625349-B2

Abstract

An optical imaging lens may include a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the lens elements, the optical imaging lens may increase resolution, enlarge aperture stop and image height, and maintain well image quality.

Inventors

JIA-SIN JHANG
Yanbin Chen
Jianpeng Li
Feng Chen

Assignees

GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220711
Priority Date: 20220112

Claims (7)

1 . A nine-lens optical imaging lens system, comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein: an optical axis region of the image-side surface of the first lens element is concave; the second lens element has negative refracting power; a periphery region of the object-side surface of the third lens element is concave; a periphery region of the object-side surface of the fourth lens element is convex, an optical axis region of the object-side surface of the fourth lens element is convex, and a periphery region of the image-side surface of the fourth lens element is convex; a periphery region of the image-side surface of the sixth lens element is convex; a periphery region of the object-side surface of the eighth lens element is concave; an optical axis region of the object-side surface of the ninth lens element is convex, and an optical axis region of the image-side surface of the ninth lens element is concave; and lens elements of the nine-lens optical imaging lens system are only the nine lens elements described above.
2 . The nine-lens optical imaging lens system according to claim 1 , wherein a thickness of the fourth lens element along the optical axis is greater than or equal to a thickness of the ninth lens element along the optical axis.
3 . The nine-lens optical imaging lens system according to claim 1 , wherein an Abbe number of the second lens element is represented by V2, an Abbe number of the third lens element is represented by V3, an Abbe number of the fourth lens element is represented by V4, an Abbe number of the fifth lens element is represented by V5, and V2, V3, V4 and V5 satisfy the inequality: V 2 +V 3 +V 4 +V 5≤135.000.
4 . The nine-lens optical imaging lens system according to claim 1 , wherein a sum of the thicknesses of all nine lens elements along the optical axis is represented by ALT, a thickness of the seventh lens element along the optical axis is represented by T7, a distance from the image-side surface of the seventh lens element to the object-side surface of the eighth lens element along the optical axis is represented by G78, and ALT, T7 and G78 satisfy the inequality: ALT/( T 7 +G 78)≤6.600.
5 . The nine-lens optical imaging lens system according to claim 1 , wherein a thickness of the eighth lens element along the optical axis is represented by T8, a distance from the image-side surface of the eighth lens element to the object-side surface of the ninth lens element along the optical axis is represented by G89, a thickness of the ninth lens element along the optical axis is represented by T9, a distance from the image-side surface of the second lens element to the object-side surface of the third lens element along the optical axis is represented by G23, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis is represented by G56, and T8, G89, T9, G23 and G56 satisfy the inequality: ( T 8 +G 89 +T 9)/( G 23 +G 56)≤2.500.
6 . The nine-lens optical imaging lens system according to claim 1 , wherein a distance from the object-side surface of the first lens element to the image-side surface of the ninth lens element along the optical axis is represented by TL, a distance from the image-side surface of the ninth lens element to an image plane along the optical axis is represented by BFL, and TL and BFL satisfy the inequality: TL/BFL ≥6.000.
7 . The nine-lens optical imaging lens system according to claim 1 , wherein a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL, a sum of a distance from the image-side surface of the first lens element to the object-side surface of the second lens element along the optical axis, a distance from the image-side surface of the second lens element to the object-side surface of the third lens element along the optical axis, a distance from the image-side surface of the third lens element to the object-side surface of the fourth lens element along the optical axis, a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis, a distance from the image-side surface of the sixth lens element to the object-side surface of the seventh lens element along the optical axis, a distance from the image-side surface of the seventh lens element to the object-side surface of the eighth lens element along the optical axis and a distance from the image-side surface of the eighth lens element to the object-side surface of the ninth lens element along the optical axis is represented by AAG, and TTL and AAG satisfy the inequality: TTL/AAG ≤3.500.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to P.R.C. Patent Application No. 202210032815.2 titled “Optical Imaging Lens,” filed on Jan. 12, 2022, with the China National Intellectual Property Administration (CNIPA) of the People's Republic of China. TECHNICAL FIELD The present disclosure relates to optical imaging lenses, and particularly, optical imaging lenses having, in some embodiments, nine lens elements. BACKGROUND As the specifications of mobile electronical devices rapidly evolve, various types of key components, such as optical imaging lenses, are developed. Desirable objectives for designing an optical imaging lens may not be limited to great aperture stop and compact sizes, but may also include high pixel number along with high resolution. High pixel number implies that an image height must be increased by using a greater image sensor accepting imaging rays. Traditional designs providing high pixel number may force the resolution to be raised, and enlarging aperture stop in such designs will raise difficulty of design. Accordingly, adding lens elements in a limit system length, promoting resolution and enlarging aperture stop, along with increasing image height in an optical imaging lens may be a challenge in the industry. SUMMARY In light of aforesaid problems, the present disclosure provides for optical imaging lenses showing a slim and compact appearance, small Fno, great image height and good imaging quality. In an example embodiment, an optical imaging lens may be used for shooting a video or picture in a mobile electronical device, such as cell phone, digital camera, tablet computer, personal digital assistant (PDA), etc. The optical imaging lens may comprise nine lens elements, hereinafter referred to as first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements and positioned sequentially from an object side to an image side along an optical axis. Each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements may also have an object-side surface facing toward the object side and allowing imaging rays to pass through. Each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens elements may also have an image-side surface facing toward the image side and allowing the imaging rays to pass through. Through configuration of convex/concave surface shape of the nine lens elements, the optical imaging lens may increase resolution and enlarge aperture stop and image height at the same time. In the specification, parameters used here are defined as follows: a thickness of the first lens element along the optical axis is represented by T1, a distance from the image-side surface of the first lens element to the object-side surface of the second lens element along the optical axis, i.e. an air gap between the first lens element and the second lens element along the optical axis, is represented by G12, a thickness of the second lens element along the optical axis is represented by T2, a distance from the image-side surface of the second lens element to the object-side surface of the third lens element along the optical axis, i.e. an air gap between the second lens element and the third lens element along the optical axis, is represented by G23, a thickness of the third lens element along the optical axis is represented by T3, a distance from the image-side surface of the third lens element to the object-side surface of the fourth lens element along the optical axis, i.e. an air gap between the third lens element and the fourth lens element along the optical axis, is represented by G34, a thickness of the fourth lens element along the optical axis is represented by T4, a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis, i.e. an air gap between the fourth lens element and the fifth lens element along the optical axis, is represented by G45, a thickness of the fifth lens element along the optical axis is represented by T5, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis, i.e. an air gap between the fifth lens element and the sixth lens element along the optical axis, is represented by G56, a thickness of the sixth lens element along the optical axis is represented by T6, a distance from the image-side surface of the sixth lens element to the object-side surface of the seventh lens element along the optical axis, i.e. an air gap between the sixth lens element and the seventh lens element along the optical axis, is represented by G67, a thickness of the seventh lens element along the optical axis is represented by T7, a distance from the image-side surface of the seventh lens element to the object-side surface of the eighth lens element along the optical axis, i.e. an air gap between the seventh lens element and t