# US 2014/0153113 A1 · Image capturing optical lens assembly

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- Number: US 2014/0153113 A1
- Document ID: US20140153113A1
- Status: Published application
- Kind: A1
- Application number: 13/747,484
- Filed: 2013-01-23
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Largan Precision Co., Ltd.
- Applicants: Largan Precision Co., Ltd.
- Inventors: Tsung-Han TSAI; Hsin-Hsuan HUANG
- Web page: https://patentgrep.com/patent/US20140153113A1

## 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 9/62: having six components only
- G02B 13/18: with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

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

## Claims

### Claim 1

An image capturing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface;
a second lens element with negative refractive power having a concave object-side surface;
a third lens element having negative refractive power;
a fourth lens element having refractive power;
a fifth lens element with positive refractive power having a convex image-side surface; and
a sixth lens element with refractive power having a concave image-side surface, wherein an object-side surface and the image-side surface of the sixth lens element are aspheric, and the sixth lens element has at least one inflection point on the image-side surface thereof;
wherein a curvature of the object-side surface of the second lens element is C3, a curvature of an image-side surface of the second lens element is C4, the image capturing optical lens assembly further comprises a stop, an axial distance between the stop and a non-axial critical point on the image-side surface of the sixth lens element is Dsc, an axial distance between the object-side surface of the first lens element and an image plane is TL, and the following relationships are satisfied:
0<(C3−C4)/(C3+C4)<5.0; and
0.5<Dsc/TL<1.0.

### Claim 2 (depends on 1)

The image capturing optical lens assembly of claim 1, wherein the sixth lens element has negative refractive power.

### Claim 3 (depends on 2)

The image capturing optical lens assembly of claim 2, wherein the curvature of the object-side surface of the second lens element is C3, the curvature of the image-side surface of the second lens element is C4, and the following relationship is satisfied:
0<(C3−C4)/(C3+C4)<2.0.

### Claim 4 (depends on 3)

The image capturing optical lens assembly of claim 3, wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and the following relationship is satisfied:
0<f2/f3<0.6.

### Claim 5 (depends on 3)

The image capturing optical lens assembly of claim 3, wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, and the following relationship is satisfied:
0.5<(V2+V3)/V1<1.0.

### Claim 6 (depends on 3)

The image capturing optical lens assembly of claim 3, wherein a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a focal length of the image capturing optical lens assembly is f, and the following relationship is satisfied:
0.08<(CT2+CT3)/f<0.16.

### Claim 7 (depends on 3)

The image capturing optical lens assembly of claim 3, wherein the object-side surface and an image-side surface of the first lens element, the object-side surface and the image-side surface of the second lens element, an object-side surface and an image-side surface of the third lens element, an object-side surface and an image-side surface of the fourth lens element, and an object-side surface and the image-side surface of the fifth lens element are aspheric.

### Claim 8 (depends on 2)

The image capturing optical lens assembly of claim 2, wherein a curvature radius of the object-side surface of the sixth lens element is R11, a curvature radius of the image-side surface of the sixth lens element is R12, and the following relationship is satisfied:
−0.85<R12/R11<0.4.

### Claim 9 (depends on 8)

The image capturing optical lens assembly of claim 8, wherein a focal length of the second lens element is f2, a curvature radius of the image-side surface of the second lens element is R4, and the following relationship is satisfied:
0<f2/R4<1.5.

### Claim 10 (depends on 8)

The image capturing optical lens assembly of claim 8, wherein a focal length of the image capturing optical lens assembly is f, 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, a focal length of the sixth lens element is f6, and the following relationship is satisfied:
0.1<(|f/f2|+|f/f3|+|f/f4|)/(|f/f5|+|f/f6|)<0.6.

### Claim 11 (depends on 8)

The image capturing optical lens assembly of claim 8, wherein a curvature of an object-side surface of the third lens element is C5, a curvature of an image-side surface of the third lens element is C6, and the following relationship is satisfied:
−0.4<(C5−C6)/(C5+C6)<0.

### Claim 12 (depends on 8)

The image capturing optical lens assembly of claim 8, wherein a maximum image height of the image capturing optical lens assembly is ImgH, a focal length of the image capturing optical lens assembly is f, and the following relationship is satisfied:
0.65<ImgH/f<0.95.

### Claim 13

An image capturing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface;
a second lens element with negative refractive power having a concave object-side surface;
a third lens element having negative refractive power;
a fourth lens element having refractive power;
a fifth lens element with positive refractive power having a convex image-side surface; and
a sixth lens element with negative refractive power having a concave image-side surface, wherein an object-side surface and the image-side surface of the sixth lens element are aspheric, and the sixth lens element has at least one inflection point on the image-side surface thereof;
wherein a curvature of the object-side surface of the second lens element is C3, a curvature of an image-side surface of the second lens element is C4, and the following relationship is satisfied:
0.3<(C3−C4)/(C3+C4)≦1.0.

### Claim 14 (depends on 13)

The image capturing optical lens assembly of claim 13, further comprising:
a stop, wherein an axial distance between the stop and a non-axial critical point on the image-side surface of the sixth lens element is Dsc, an axial distance between the object-side surface of the first lens element and an image plane is TL, and the following relationship is satisfied:
0.5<Dsc/TL<1.0.

### Claim 15 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, and the following relationship is satisfied:
0.5<(V2+V3)/V1<1.0.

### Claim 16 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and the following relationship is satisfied:
0<f2/f3<0.6.

### Claim 17 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein a curvature radius of the object-side surface of the sixth lens element is R11, a curvature radius of the image-side surface of the sixth lens element is R12, and the following relationship is satisfied:
−0.85<R12/R11<0.4.

### Claim 18 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a focal length of the image capturing optical lens assembly is f, and the following relationship is satisfied:
0.08<(CT2+CT3)/f<0.16.

### Claim 19 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein a focal length of the image capturing optical lens assembly is f, 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, a focal length of the sixth lens element is f6, and the following relationship is satisfied:
0.1<(|f/f2|+|f/f3|+|f/f4|)/(|f/f5|+|f/f6|)<0.6.

### Claim 20 (depends on 13)

The image capturing optical lens assembly of claim 13, wherein a curvature of an object-side surface of the third lens element is C5, a curvature of an image-side surface of the third lens element is C6, and the following relationship is satisfied:
−0.4<(C5−C6)/(C5+C6)<0.