# US 2022/0035136 A1 · Optical Imaging Lens Assembly

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- Number: US 2022/0035136 A1
- Document ID: US20220035136A1
- Status: Published application
- Kind: A1
- Application number: 17/333,023
- Filed: 2021-05-28
- Published: 2022-02-03
- Earliest claimed: 2020-07-29
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd.
- Inventors: Yanping LI; Lingbo HE; Fujian DAI; Liefeng ZHAO
- Web page: https://patentgrep.com/patent/US20220035136A1

## CPC

- G02B 13/0045: {having five or more lenses}
- G01D 5/26: characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G02B 5/20: Filters (polarising elements G02B5/30)
- G02B 9/62: having six components only
- G02B 15/14: by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR

## Abstract

The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens group with a positive refractive power, including a first lens with a refractive power; a second lens group, sequentially including from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with refractive power respectively; an optical filter; and a photosensitive element; wherein at least one of the first lens to the sixth lens is arranged to be movable relative to the photosensitive element in a direction of the optical axis; a maximum effective semi-diameter DT51 of an object-side surface of the fifth lens and a maximum effective semi-diameter DT32 of an image-side surface of the third lens satisfy 1.5<DT51/DT32<2.5.

## Claims

### Claim 1

An optical imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis:
a first lens group with a positive refractive power, comprising a first lens with a refractive power;
a second lens group, sequentially comprising from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with refractive power respectively;
an optical filter; and
a photosensitive element;
wherein at least one of the first lens to the sixth lens is arranged to be movable relative to the photosensitive element in a direction of the optical axis; effective semi-diameters of each lens in the second lens to the sixth lens progressively increase in sequence; and
a maximum effective semi-diameter DT51 of an object-side surface of the fifth lens and a maximum effective semi-diameter DT32 of an image-side surface of the third lens may satisfy: 1.5<DT51/DT32<2.5.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a sum ΣCT of center thicknesses of each lens in the first lens group and the second lens group on the optical axis satisfy: 0.1<CT1/ΣCT<0.5.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a total effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy: 1.6<f/EPD<2.6.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy: −2<f5/f6<−0.5.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein ImgH is a half the diagonal length of an effective pixel region on the photosensitive element, TTL is a spacing distance from an object-side surface of the first lens to the effective pixel region on the photosensitive element on the optical axis, and ImgH and TTL satisfy: TTL/ImgH<1.5.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximum effective semi-diameter DT41 of an object-side surface of the fourth lens and the maximum effective semi-diameter DT51 of the object-side surface of the fifth lens satisfy: 0.5<DT41/DT51<1.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, further comprising a diaphragm arranged on the object side of the first lens, wherein
a distance ST from the diaphragm to an object-side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis satisfy: −1<ST/CT1<0.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a curvature radius R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens satisfy: 0.5<R9/f5<1.5.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 0.5<CT2/CT3<1.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.8<CT2/CT4<1.2.

### Claim 11 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f5 of the fifth lens satisfy: 0.7<f1/f5<1.3.

### Claim 12 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a maximum effective semi-diameter DT52 of the image-side surface of the fifth lens satisfy: −0.3<SAG52/DT52<0.

### Claim 13 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an Abbe number V3 of the third lens satisfies: 30<V3<50.

### Claim 14 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an object-side surface of the first lens is a convex surface and an image-side surface of the second lens is a concave surface.

### Claim 15 (depends on 14)

The optical imaging lens assembly according to claim 14, wherein a curvature radius R1 of the object-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens satisfy: −0.5<(R1-R4)/(R1+R4)<0.

### Claim 16

An optical imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis:
a first lens group with a positive refractive power, comprising a first lens with a refractive power;
a second lens group, sequentially comprising from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with refractive power respectively;
an optical filter; and
a photosensitive element;
wherein at least one of the first lens to the sixth lens is arranged to move relative to the photosensitive element in a direction of the optical axis; and
an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a maximum effective semi-diameter DT52 of the image-side surface of the fifth lens satisfy: −0.3<SAG52/DT52<0.

### Claim 17 (depends on 16)

The optical imaging lens assembly according to claim 16, wherein a center thickness CT1 of the first lens on the optical axis and a sum ΣCT of center thicknesses of each lens in the first lens group and the second lens group on the optical axis satisfy: 0.1<CT1/ΣCT<0.5.

### Claim 18 (depends on 16)

The optical imaging lens assembly according to claim 16, wherein a total effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy: 1.6<f/EPD<2.6.

### Claim 19 (depends on 16)

The optical imaging lens assembly according to claim 16, wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy: −2<f5/f6<−0.5.

### Claim 20 (depends on 16)

The optical imaging lens assembly according to claim 16, wherein ImgH is a half the diagonal length of an effective pixel region on the photosensitive element, TTL is a spacing distance from an object-side surface of the first lens to the effective pixel region on the photosensitive element on the optical axis, and ImgH and TTL satisfy: TTL/ImgH<1.5.