Photographing optical lens assembly, image capturing unit and electronic device

Patent metadata

Field	Value
Publication number	US-2024012223-A1
Application number	US-202217900674-A
Country	US
Kind code	A1
Filing date	Aug 31, 2022
Priority date	Jul 8, 2022
Publication date	Jan 11, 2024
Grant date	—

Abstract

A photographing optical lens assembly includes five lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The second lens element has negative refractive power. When specific conditions are satisfied, the requirements of compact size and high image quality can be met by the photographing optical lens assembly, simultaneously.

First claim

What is claimed is:

1 . A photographing optical lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element;
wherein the first lens element has positive refractive power, and the second lens element has negative refractive power; wherein an Abbe number of the second lens element is V 2 , an Abbe number of the third lens element is V 3 , an Abbe number of the fourth lens element is V 4 , a sum of central thicknesses of all lens elements of the photographing optical lens assembly is ΣCT, a sum of axial distances between each of all adjacent lens elements of the photographing optical lens assembly is ΣAT, a central thickness of the first lens element is CT 1 , a central thickness of the second lens element is CT 2 , a central thickness of the fourth lens element is CT 4 , a central thickness of the fifth lens element is CT 5 , an axial distance between an object-side surface of the first lens element and an image-side surface of the fifth lens element is TD, an axial distance between the image-side surface of the fifth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, an axial distance between the third lens element and the fourth lens element is T 34 , and the following conditions are satisfied: 30<V 2 +V 3 +V 4 <93; 0.5<ΣCT/ΣAT<2.5; 1.8<(CT 1 +CT 2 )/(CT 4 +CT 5 )<5.0; 0.1<TD/BL<1.1; 1.0<TL/ImgH<4.2; and 0.01<CT 4 /T 34 <4.0.

2 . The photographing optical lens assembly of claim 1 , wherein the Abbe number of the second lens element is V 2 , the Abbe number of the third lens element is V 3 , the Abbe number of the fourth lens element is V 4 , and the following condition is satisfied:
50<V 2 +V 3 +V 4 <90.

3 . The photographing optical lens assembly of claim 1 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the maximum image height of the photographing optical lens assembly is ImgH, and the following condition is satisfied:
3.0<TL/ImgH<4.0.

4 . The photographing optical lens assembly of claim 1 , wherein the central thickness of the fourth lens element is CT 4 , the axial distance between the third lens element and the fourth lens element is T 34 , and the following condition is satisfied:
0.1<CT 4 /T 34 <2.5.

5 . The photographing optical lens assembly of claim 1 , wherein a curvature radius of an object-side surface of the third lens element is R 5 , a curvature radius of an image-side surface of the third lens element is R 6 , and the following condition is satisfied:
(R 5 +R 6 )/(R 5 −R 6 )<−1.5.

6 . The photographing optical lens assembly of claim 1 , wherein a curvature radius of an object-side surface of the third lens element is R 5 , a curvature radius of an object-side surface of the fourth lens element is R 7 , and the following condition is satisfied:
−15.0<(R 5 +R 7 )/(R 5 −R 7 )<0.6.

7 . The photographing optical lens assembly of claim 1 , wherein a curvature radius of an object-side surface of the fifth lens element is R 9 , a curvature radius of the image-side surface of the fifth lens element is R 10 , and the following condition is satisfied:
−0.5<(R 9 +R 10 )/(R 9 −R 10 )<13.0.

8 . The photographing optical lens assembly of claim 1 , wherein a focal length of the second lens element is f 2 , the central thickness of the second lens element is CT 2 , and the following condition is satisfied:
3.2<|f 2 |/CT 2 <27.5.

9 . The photographing optical lens assembly of claim 1 , further comprising an aperture stop, wherein the central thickness of the first lens element is CT 1 , the central thickness of the second lens element is CT 2 , a central thickness of the third lens element is CT 3 , an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , the axial distance between the object-side surface of the first lens element and the image surface is TL, an axial distance between the aperture stop and the image-side surface of the fifth lens element is SD, the axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, and the following conditions are satisfied:
0.15<(CT 1 +T 12 +CT 2 +T 23 +CT 3 )/TL<0.32; and 0.35<SD/TD<0.95.

10 . The photographing optical lens assembly of claim 1 , wherein a focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , and the following condition is satisfied:
−0.45<f 3 /f 4 <3.0.

11 . The photographing optical lens assembly of claim 1 , wherein the central thickness of the second lens element is CT 2 , the central thickness of the fourth lens element is CT 4 , and the following condition is satisfied:
0.1<CT 4 /CT 2 <1.2.

12 . The photographing optical lens assembly of claim 1 , wherein a minimum value among Abbe numbers of all lens elements of the photographing optical lens assembly is Vmin, and the following condition is satisfied:
Vmin<20.

13 . The photographing optical lens assembly of claim 1 , wherein a chief ray angle at a maximum image height position of the photographing optical lens assembly is CRA, and the following condition is satisfied:
0.25<tan(CRA)<0.45.

14 . The photographing optical lens assembly of claim 1 , further comprising a reflective element located between an imaged object and the image surface.

15 . The photographing optical lens assembly of claim 14 , wherein the reflective element is located at an object side of the object-side surface of the first lens element or at an image side of the image-side surface of the fifth lens element.

16 . An image capturing unit, comprising:
the photographing optical lens assembly of claim 1 ; and an image sensor disposed on the image surface of the photographing optical lens assembly.

17 . An electronic device, comprising:
the image capturing unit of claim 16 .

18 . A photographing optical lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element;
wherein the first lens element has positive refractive power, the second lens element has negative refractive power, and the third lens element has an image-side surface being concave in a paraxial region thereof; wherein an Abbe number of the second lens element is V 2 , an Abbe number of the third lens element is V 3 , an Abbe number of the fourth lens element is V 4 , a sum of central thicknesses of all lens elements of the photographing optical lens assembly is ΣCT, a sum of axial distances between each of all adjacent lens elements of the photographing optical lens assembly is ΣAT, a central thickness of the first lens element is CT 1 , a central thickness of the second lens element is CT 2 , a central thickness of the third lens element is CT 3 , a central thickness of the fourth lens element is CT 4 , a central thickness of the fifth lens element is CT 5 , an axial distance between an object-side surface of the first lens element and an image-side surface of the fifth lens element is T

Assignees

• Largan Precision Co Ltd

Inventors

• Lin Yu Jui
• Tseng Yu-Tai
• Fu wei-xiang
• Tsai Cheng-Yu
• Huang Hsin-Hsuan

Classifications

• G02B9/60 Primary

  having five components only · CPC title

• G02B13/0065

  having a beam-folding prism or mirror · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• H04N5/2253

  Electricity · mapped topic

• G02B13/02 Primary

  Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length · CPC title