Optical imaging lens

Patent metadata

Field	Value
Publication number	US-12345952-B2
Application number	US-202217835978-A
Country	US
Kind code	B2
Filing date	Jun 9, 2022
Priority date	Dec 28, 2021
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

An optical imaging lens includes a first lens element to an eighth lens element. The first lens element has positive refracting power, a periphery region of the image-side surface of the first lens element is concave, a periphery region of the object-side surface of the third lens element is concave, an optical axis region of the image-side surface of the sixth lens element is convex, an optical axis region of the object-side surface of the eighth lens element is convex, and a periphery region of the image-side surface of the eighth lens element is convex. Lens elements included by the optical imaging lens are only eight lens elements described above to satisfy D41t51/(T3+G34)≥1.700.

First claim

What is claimed is:

1. An optical imaging lens, from an object side to an image side in order along an optical axis 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 and an eighth lens element, the first lens element to the eighth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
the first lens element has positive refracting power, and a periphery region of the image-side surface of the first lens element is concave;
a periphery region of the object-side surface of the third lens element is concave;
an optical axis region of the image-side surface of the sixth lens element is convex;
an optical axis region of the object-side surface of the eighth lens element is convex, and a periphery region of the image-side surface of the eighth lens element is convex;
wherein lens elements included by the optical imaging lens are only the eight lens elements described above, and wherein the optical imaging lens satisfies the relationships: D41t51/(T3+G34)≥1.700 and a thickness of the seventh lens element along the optical axis is smaller than an air gap between the seventh lens element and the eighth lens element along the optical axis, wherein D41t51 is defined as the distance from the object-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, G34 is an air gap between the third lens element and the fourth lens element along the optical axis.

2. The optical imaging lens of claim 1 , wherein D11t41 is defined as the distance from the object-side surface of the first lens element to the object-side surface of the fourth lens element along the optical axis, T4 is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: D11t41/T4≤4.300.

3. The optical imaging lens of claim 1 , wherein T6 is a thickness of the sixth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, D42t52 is defined as the distance from the image-side surface of the fourth lens element to the image-side surface of the fifth lens element along the optical axis, D62t82 is defined as the distance from the image-side surface of the sixth lens element to the image-side surface of the eighth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (D42t52+D62t82)/(G56+T6)≤4.100.

4. The optical imaging lens of claim 1 , wherein EFL is an effective focal length of the optical imaging lens, T1 is a thickness of the first lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, T8 is a thickness of the eighth lens element along the optical axis, and the optical imaging lens satisfies the relationship: EFL/(T1+T6+T8)≤4.000.

5. The optical imaging lens of claim 1 , wherein TTL is the distance from the object-side surface of the first lens element to an image plane along the optical axis, T1 is a thickness of the first lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, T8 is a thickness of the eighth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: TTL/(T1+G56+T6+T8)≤4.000.

6. The optical imaging lens of claim 1 , wherein Fno is a f-number of the optical imaging lens, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, and the optical imaging lens satisfies the relationship: Fno*(T1+G12+T3+G34)/(T2+G23)≤3.110.

7. The optical imaging lens of claim 1 , wherein ImgH is an image height of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, T6 is a thickness of the sixth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, D31t52 is defined as the distance from the object-side surface of the third lens element to the image-side surface of the fifth lens element along the optical axis, and the optical imaging lens satisfies the relationship: 3.800≤(ImgH+EPD+G56+T6)/D31t52.

8. An optical imaging lens, from an object side to an image side in order along an optical axis 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 and an eighth lens element, the first lens element to the eighth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
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 concave;
an optical axis region of the image-side surface of the sixth lens element is convex;
an optical axis region of the object-side surface of the eighth lens element is convex, and a periphery region of the image-side surface of the eighth lens element is convex;
wherein lens elements included by the optical imaging lens are only the eight lens elements described above, and wherein the optical imaging lens satisfies the relationships: D41t51/(T3+G34)≥1.700 and a thickness of the seventh lens element along the optical axis is smaller than an air gap between the seventh lens element and the eighth lens element along the optical axis, wherein D41t51 is defined as the distance from the object-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, G34 is an air gap between the third lens element and the fourth lens element along the optical axis.

9. The optical imaging lens of claim 8 , wherein V3 is an Abbe number of the third lens element, V8 is an Abbe number of the eighth lens element, and the optical imaging lens satisfies the relationship: V3+V8≤100.000.

10. The optical imaging lens of claim 8 , wherein V7 is an Abbe number of the seventh lens element, V8 is an Abbe number of the eighth lens element, and the optical imaging lens satisfies the relationship: V7+V8≤100.000.

11. The optical imaging lens of claim 8 , wherein Fno is a f-number of the optical imaging lens, T2 is a thickness of the second lens element along the optical axis, T4 is a thickness of the fourth lens element along the optical axis, D62t82 is defined as the distance from the image-side surface of the sixth lens element to the image-side surface of the eighth lens element along the optical axis, AAG is a sum of seven air gaps from the first lens element to the eighth lens element along the optical axis, and the optical imaging lens satisfies the relationship: Fno*(T2+G34+T4+D62t82)/AAG≤3.600.

12. The optical imaging lens of claim 8 , wherein ImgH is an image height of the optical imaging lens, D41t62 is defined as

Assignees

• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Liao Huabin
• Huang Songchao
• Lin Hai
• Hsieh Hung-Chien

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B1/041

  Lenses · CPC title

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G02B9/64 Primary

  having more than six components · CPC title