# US 10,871,637 B2 · Photographing optical lens assembly, image capturing device and electronic device

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- Number: US 10,871,637 B2
- Document ID: US10871637B2
- Status: Granted
- Kind: B2
- Application number: 16/894,929
- Filed: 2020-06-08
- Published: 2020-09-24
- Granted: 2020-12-22
- Earliest claimed: 2014-11-12
- Assignees: Largan Precision Co., Ltd.
- Applicants: Largan Precision Co., Ltd.
- Inventors: Lin-Yao Liao; Hsin-Hsuan Huang
- Web page: https://patentgrep.com/patent/US10871637B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 5/005: {Diaphragms (for cameras G03B9/02)}
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- G02B 9/60: having five components only
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- H10F 39/806: {Optical elements or arrangements associated with the image sensors}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## 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 convex object-side surface and a concave image-side surface. The third lens element has refractive power. The fourth lens element has refractive power, and an object-side surface and an image-side surface thereof are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein an object-side surface and the image-side surface thereof are aspheric, and at least one of the object-side surface and the image-side surface thereof has at least one inflection point.

## Claims

### Claim 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:
a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element; each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element with positive refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being convex in a paraxial region thereof; the third lens element has negative refractive power; the refractive power of the first lens element is stronger than refractive powers of the second lens element, the third lens element, the fourth lens element and the fifth lens element;
wherein an Abbe number of the second lens element is V2, an Abbe number of the fourth lens element is V4, a focal length of the photographing optical lens assembly is f, a maximum image height of the photographing optical lens assembly is ImgH, a half of a maximal field of view of the photographing optical lens assembly is HFOV, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the image-side surface of the fourth lens element is R8, and the following relationships are satisfied:
20<V2+V4<65;
2.00<f/ImgH;
HFOV<25 degrees; and
|R4|<|R8|.

### Claim 2 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the second lens element with negative refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof.

### Claim 3 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the fourth lens element has positive refractive power; there is no relative movement 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.

### Claim 4 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the third lens element has the image-side surface being concave in a paraxial region thereof; there is at least one inflection point on at least one of the object-side surface and the image-side surface of the third lens element.

### Claim 5 (depends on 1)

The photographing optical lens assembly of claim 1, wherein there is at least one inflection point on at least one of the object-side surface and the image-side surface of the fifth lens element; an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the fourth lens element and the fifth lens element is T45, and the following relationship is satisfied:
0<T12<T45<T23,

### Claim 6 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the focal length of the photographing optical lens assembly is f, the maximum image height of the photographing optical lens assembly is ImgH, the half of a maximal field of view of the photographing optical lens assembly is HFOV, and the following relationships are satisfied:
2.98≤f/ImgH; and
HFOV≤18.4 degrees.

### Claim 7 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, the Abbe number of the second lens element is V2, the Abbe number of the fourth lens element is V4, and the following relationships are satisfied:
|R4|<|R9|;
|R4|<|R10|; and
20<V2+V4≤47.00.

### Claim 8 (depends on 1)

The photographing optical lens assembly of claim 1, further comprising:
an aperture stop, wherein an axial distance between the aperture stop and the image-side surface of the fifth lens element is SD, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationships are satisfied:
0.75<SD/TD<1.2; and
|R10/R9|<0.9.

### Claim 9 (depends on 1)

The photographing optical lens assembly of claim 1, wherein the focal length of the photographing optical lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, and the following relationships are satisfied:
|f/f1|>|f/f2|>|f/f3|;
|f/f1|>|f/f2|>|f/f4|; and
|f/f1|>|f/f2|>|f/f5|.

### Claim 10 (depends on 1)

The photographing optical lens assembly of claim 1, wherein there is an air gap between each of adjacent lens elements of the five lens elements; the photographing optical lens assembly further comprises an aperture stop disposed on an object side of the first lens element.

### Claim 11 (depends on 1)

The photographing optical lens assembly of claim 1, wherein curvature radii of the object-side surface and the image-side surface of the fifth lens element have the same sign.

### Claim 12

A photographing optical lens assembly comprising five lens elements, the five lens elements being, 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; each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the fourth lens element has positive refractive power; a refractive power of the first lens element is stronger than refractive powers of the second lens element, the third lens element, the fourth lens element and the fifth lens element;
wherein an Abbe number of the second lens element is V2, an Abbe number of the fourth len element is V4, a focal length of the photographing optical lens assembly is f, a maximum image height of the photographing optical lens assembly is ImgH, a half of a maximal field of view of the photographing optical lens assembly is HFOV, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the image-side surface of the fourth lens element is R8, and the following relationships are satisfied:
20<V2+V4≤47.00;
2.00<f/ImgH;
HFOV<25 degrees; and
|R4|<|R8|.

### Claim 13 (depends on 12)

The photographing optical lens assembly of claim 12, wherein the first lens element has positive refractive power; the second lens element with negative refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof.

### Claim 14 (depends on 12)

The photographing optical lens assembly of claim 12, wherein the fourth lens element has the object-side surface being concave in a paraxial region thereof and the image-side surface being convex in a paraxial region thereof.

### Claim 15 (depends on 12)

The photographing optical lens assembly of claim 12, wherein the third lens element has the image-side surface being concave in a paraxial region thereof; a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationship is satisfied:
|R10/R9|<0.9.

### Claim 16 (depends on 12)

The photographing optical lens assembly of claim 12, wherein there is at least one inflection point on at least one of the object-side surface and the image-side surface of the third lens element; the photographing optical lens assembly further comprises an aperture stop disposed on an object side of the first lens element.

### Claim 17 (depends on 12)

The photographing optical lens assembly of claim 12, wherein the focal length of the photographing optical lens assembly is f, the maximum image height of the photographing optical lens assembly is ImgH, the half of a maximal field of view of the photographing optical lens assembly is HFOV, and the following relationships are satisfied:
2.98≤f/ImgH; and
HFOV≤18.4 degrees.

### Claim 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:
a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element; each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element has positive refractive power; the third lens element has negative refractive power; at least one of the object-side surfaces and the image-side surfaces of the five lens elements is aspheric;
wherein an Abbe number of the second lens element is V2, an Abbe number of the fourth lens element is V4, a focal length of the photographing optical lens assembly is f, a maximum image height of the photographing optical lens assembly is ImgH, a half of a maximal field of view of the photographing optical lens assembly is HFOV, and the following relationships are satisfied:
20<V2+V4≤42.80;
2.00<f/ImgH; and
HFOV<25 degrees.

### Claim 19 (depends on 18)

The photographing optical lens assembly of claim 18, wherein the second lens element with negative refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof.

### Claim 20 (depends on 18)

The photographing optical lens assembly of claim 18, wherein the third lens element has the image-side surface being concave in a paraxial region thereof; there is at least one inflection point on at least one of the object-side surface and the image-side surface of the third lens element.

### Claim 21 (depends on 18)

The photographing optical lens assembly of claim 18, wherein a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationship is satisfied:
|R10/R9|<0.9.

### Claim 22 (depends on 18)

The photographing optical lens assembly of claim 18, wherein a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationships are satisfied:
|R4|<|R8|;
|R4|<|R9|; and
|R4|<|R10|.

### Claim 23 (depends on 18)

The photographing optical lens assembly of claim 18, wherein the focal length of the photographing optical lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, and the following relationships are satisfied:
|f/f1|>|f/f2|>|f/f3|;
|f/f1|>|f/f2|>|f/f4|; and
|f/f1|>|f/f2|>|f/f5|.

### Claim 24 (depends on 18)

The photographing optical lens assembly of claim 18, wherein there is an air gap between each of adjacent lens elements of the five lens elements;
the photographing optical lens assembly further comprises an aperture stop, an axial distance between the aperture stop and the image-side surface of the fifth lens element is SD, an 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 relationship is satisfied:
0.75<SD/TD<1.2.

### Claim 25 (depends on 18)

The photographing optical lens assembly of claim 18, wherein curvature radii of the object-side surface and the image-side surface of the fifth lens element have the same sign.

### Claim 26 (depends on 18)

An image capturing device, comprising:
the photographing optical lens assembly of claim 18; and
an image sensor disposed on an image surface of the photographing optical lens assembly.

### Claim 27 (depends on 26)

An electronic device, comprising:
the image capturing device of claim 26.