Photographing optical lens assembly, image capturing device and electronic device

Patent metadata

Field	Value
Publication number	US-9638894-B2
Application number	US-201414490779-A
Country	US
Kind code	B2
Filing date	Sep 19, 2014
Priority date	Aug 12, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A photographing optical lens assembly includes, in order from an object side to an image side, 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 with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element with refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric. The fifth lens element with refractive power has a convex object-side surface, and an image-side surface being concave in a paraxial region thereof and having at least one convex shape in an off-axial region thereof, wherein the surfaced thereof are aspheric.

First claim

What is claimed is:

1. A photographing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
a second lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
a fourth lens element with refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, wherein the object-side surface and the image-side surface of the fourth lens element are aspheric; and
a fifth lens element with refractive power having an object-side surface being convex in a paraxial region thereof, and an image-side surface being concave in a paraxial region thereof and having at least one convex shape in an off-axial region thereof, wherein the object-side surface and the image-side surface of the fifth lens element are aspheric;
wherein, the photographing optical lens assembly has a total of five lens elements with refractive power, there is an air gap in a paraxial region between any two of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element that are adjacent to each other, the refractive power of the third lens element is stronger than the refractive power of the fifth lens element, a curvature radius of the object-side surface of the first lens element is R 1 , a curvature radius of the image-side surface of the second lens element is R 4 , a curvature radius of the object-side surface of the third lens element is R 5 , a curvature radius of the image-side surface of the third lens element is R 6 , a central thickness of the fourth lens element is CT 4 , a central thickness of the fifth lens element is CT 5 , an Abbe number of the fourth lens element is V 4 , and the following conditions are satisfied:
−1.0<( R 5+ R 6)/( R 5− R 6)<0.20;

R 4/ R 1<3.5;
CT 5/ CT 4<1.75; and
V4<35.

2. The photographing optical lens assembly of claim 1 , wherein the curvature radius of the object-side surface of the first lens element is R 1 , the curvature radius of the image-side surface of the second lens element is R 4 , and the following condition is satisfied:
1.0< R 4/ R 1<2.5.

3. The photographing optical lens assembly of claim 2 , wherein an axial distance between the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element is T 45 , and the following condition is satisfied:
3.0< T 34/ T 45<15.

4. The photographing optical lens assembly of claim 2 , wherein a curvature radius of the image-side surface of the fourth lens element is R 8 , a curvature radius of the object-side surface of the fifth lens element is R 9 , and the following condition is satisfied:
2.0<| R 8|/ R 9.

5. The photographing optical lens assembly of claim 1 , wherein a focal length of the photographing optical lens assembly is f, a focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , and the following condition is satisfied:
| f/f 4|+| f/f 5|<0.60.

6. The photographing optical lens assembly of claim 1 , wherein an Abbe number of the third lens element is V 3 , and the following condition is satisfied:
V3<35.

7. The photographing optical lens assembly of claim 1 , wherein the image-side surface of the fourth lens element has at least one convex shape in an off-axial region thereof.

8. The photographing optical lens assembly of claim 1 , wherein the fourth lens element has negative refractive power.

9. The photographing optical lens assembly of claim 1 , wherein an Abbe number of the second lens element is V 2 , an Abbe number of the third lens element is V 3 , the Abbe number of the fourth lens element is V 4 , an Abbe number of the fifth lens element is V 5 , and the following condition is satisfied:
80< V 2+ V 3+ V 4+ V 5<145.

10. The photographing optical lens assembly of claim 1 , wherein an off-axial region of the object-side surface of the third lens element is closer to the object side than a paraxial region of the object-side surface of the third lens element.

11. The photographing optical lens assembly of claim 1 , wherein the curvature radius of the object-side surface of the third lens element is R 5 , the curvature radius of the image-side surface of the third lens element is R 6 , and the following condition is satisfied:
−1.0<( R 5+ R 6)/( R 5− R 6)<0.

12. The photographing optical lens assembly of claim 1 , wherein an axial distance between the second lens element and the third lens element is T 23 , a central thickness of the third lens element is CT 3 , and the following condition is satisfied:
T 23 /CT 3<0.72.

13. An image capturing device, comprising:
the photographing optical lens assembly of claim 1 ; and
an image sensor, wherein the image sensor is located at the image side of the photographing optical lens assembly.

14. An electronic device, comprising:
the image capturing device of claim 13 .

15. A photographing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
a second lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
a fourth lens element with refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; wherein the object-side surface and the image-side surface of the fourth lens element are aspheric; and
a fifth lens element with refractive power having an object-side surface being convex in a paraxial region thereof, and an image-side surface being concave in a paraxial region thereof and having at least one convex shape in an off-axial region thereof, wherein the object-side surface and the image-side surface of the fifth lens element are aspheric;
wherein, the photographing optical lens assembly has a total of five lens elements with refractive power, there is an air gap in a paraxial region between any two of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element that are adjacent to each other, a curvature radius of the object-side surface of the first lens element is R 1 , a curvature radius of the image-side surface of the second lens element is R 4 , a curvature radius of the object-side surface of the third lens element is R 5 , a curvature radius of the image-side surface of the third lens element is R 6 , 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 the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element id T 45 , 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

Assignees

• Largan Precision Co Ltd

Inventors

• Hsieh Dung-Yi
• Chen Wei-Yu

Classifications

• H04N5/2254

  Electricity · mapped topic

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/60

  having five components only · CPC title