# US 12,000,989 B2 · Imaging lens assembly

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,000,989 B2
- Document ID: US12000989B2
- Status: Granted
- Kind: B2
- Application number: 17/352,397
- Filed: 2021-06-21
- Published: 2022-01-06
- Granted: 2024-06-04
- Earliest claimed: 2020-07-03
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd.
- Inventors: Yi Zhang; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12000989B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 5/005: {Diaphragms (for cameras G03B9/02)}
- G02B 9/60: having five components only
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The disclosure provides an imaging lens assembly, which sequentially includes, a movable diaphragm, a first lens, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a positive refractive power and a fifth lens with a refractive power, wherein an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens meet 1.0<f4/f1<2.3; and TSmin, a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax, a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis and CT1, a center thickness of the first lens on the optical axis meet 1.0<(|TSmin|+|TSmax|)/CT1<1.5.

## Claims

### Claim 1

An imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:
a movable diaphragm,
a first lens with a positive refractive power,
a second lens with a refractive power,
a third lens with a refractive power,
a fourth lens with a positive refractive power and
a fifth lens with a refractive power,
wherein an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens meet 1.0<f4/f1<2.3; and
TSmin, a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax, a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis and CT1, a center thickness of the first lens on the optical axis meet 1.0<(|TSmin|+|TSmax|)/CT1<1.5.

### Claim 2 (depends on 1)

The imaging lens assembly according to claim 1, wherein SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis, SAG42, a distance from an intersection point of an image-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fourth lens on the optical axis and DT42, a maximum effective radius of the image-side surface of the fourth lens meet 0.7<(SAG41+SAG42)/DT42<1.0.

### Claim 3 (depends on 1)

The imaging lens assembly according to claim 1, wherein SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis and SAG42, a distance from an intersection point of an image-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fourth lens on the optical axis meet 0.8<SAG42/SAG41≤1.3.

### Claim 4 (depends on 1)

The imaging lens according assembly to claim 1, wherein SAG22, a distance from an intersection point of an image-side surface of the second lens and the optical axis to a maximum effective radius vertex of the image-side surface of the second lens on the optical axis and CT2, a center thickness of the second lens on the optical axis meet 1.0<SAG22/CT2<1.5.

### Claim 5 (depends on 1)

The imaging lens assembly according to claim 1, wherein SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis, T45, a spacing distance of the fourth lens and the fifth lens on the optical axis and CT4, a center thickness of the fourth lens on the optical axis meet 1.0<(T45−SAG41)/CT4<1.5.

### Claim 6 (depends on 1)

The imaging lens assembly according to claim 1, wherein the effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens meet 1.0<f4/(R7+R8)<4.0.

### Claim 7 (depends on 1)

The imaging lens assembly according to claim 1, wherein a total effective focal length f of the imaging lens assembly, a radius of curvature R5 of an object-side surface of the third lens and a radius of curvature R6 of an image-side surface of the third lens meet 2.0<f/R5+f/R6<3.5.

### Claim 8 (depends on 7)

The imaging lens assembly according to claim 7, wherein CT3, a center thickness of the third lens on the optical axis and CT1, the center thickness of the first lens on the optical axis meet 0.5<CT3/CT1<1.0.

### Claim 9 (depends on 1)

The imaging lens assembly according to claim 1, wherein DT11, a maximum effective radius of the object-side surface of the first lens and DT52, a maximum effective radius of an image-side surface of the fifth lens meet 1.0<DT11/DT52<1.3.

### Claim 10 (depends on 1)

The imaging lens assembly according to claim 1, wherein DT42, a maximum effective radius of an image-side surface of the fourth lens and DT52, a maximum effective radius of an image-side surface of the fifth lens meet 0.9<DT42/DT52<1.1.

### Claim 11 (depends on 1)

The imaging lens assembly according to claim 1, wherein EPDmax, a maximum entrance pupil diameter (EPD) of the imaging lens assembly and ImgH, a half of a diagonal length of an effective pixel region on the imaging surface of the imaging lens assembly meet EPDmax/ImgH<2.5.

### Claim 12

An imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:
a movable diaphragm,
a first lens with a positive refractive power,
a second lens with a refractive power,
a third lens with a refractive power,
a fourth lens with a positive refractive power and
a fifth lens with a refractive power,
wherein TSmin, a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax, a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis and CT1, a center thickness of the first lens on the optical axis meet 1.0<(|TSmin|+|TSmax|)/CT1<1.5; and
SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis, SAG42, a distance from an intersection point of an image-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fourth lens on the optical axis and DT42, a maximum effective radius of the image-side surface of the fourth lens meet 0.7<(SAG41+SAG42)/DT42<1.0.

### Claim 13 (depends on 12)

The imaging lens assembly according to claim 12, wherein DT42, a maximum effective radius of an image-side surface of the fourth lens and DT52, a maximum effective radius of an image-side surface of the fifth lens meet 0.9<DT42/DT52<1.1.

### Claim 14 (depends on 12)

The imaging lens assembly according to claim 12, wherein SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis and SAG42, a distance from an intersection point of an image-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fourth lens on the optical axis meet 0.8<SAG42/SAG41≤1.3.

### Claim 15 (depends on 12)

The imaging lens assembly according to claim 12, wherein SAG22, a distance from an intersection point of an image-side surface of the second lens and the optical axis to a maximum effective radius vertex of the image-side surface of the second lens on the optical axis and CT2, a center thickness of the second lens on the optical axis meet 1.0<SAG22/CT2<1.5.

### Claim 16 (depends on 12)

The imaging lens assembly according to claim 12, wherein SAG41, a distance from an intersection point of an object-side surface of the fourth lens and the optical axis to a maximum effective radius vertex of the object-side surface of the fourth lens on the optical axis, T45, a spacing distance of the fourth lens and the fifth lens on the optical axis and CT4, a center thickness of the fourth lens on the optical axis meet 1.0<(T45−SAG41)/CT4<1.5.

### Claim 17 (depends on 12)

The imaging lens assembly according to claim 12, wherein the effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens meet 1.0<f4/(R7+R8)<4.0.

### Claim 18 (depends on 12)

The imaging lens assembly according to claim 12, wherein a total effective focal length f of the imaging lens assembly, a radius of curvature R5 of an object-side surface of the third lens and a radius of curvature R6 of an image-side surface of the third lens meet 2.0<f/R5+f/R6<3.5.

### Claim 19 (depends on 12)

The imaging lens assembly according to claim 12, wherein CT3, a center thickness of the third lens on the optical axis and CT1, the center thickness of the first lens on the optical axis meet 0.5<CT3/CT1<1.0.

### Claim 20 (depends on 12)

The imaging lens assembly according to claim 12, wherein DT11, a maximum effective radius of the object-side surface of the first lens and DT52, a maximum effective radius of an image-side surface of the fifth lens meet 1.0<DT11/DT52<1.3.