# US 11,307,388 B2 · Camera optical lens including six lenses of ++−+−+ refractive powers

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- Number: US 11,307,388 B2
- Document ID: US11307388B2
- Status: Granted
- Kind: B2
- Application number: 16/677,578
- Filed: 2019-11-07
- Published: 2020-12-31
- Granted: 2022-04-19
- Earliest claimed: 2019-06-30
- Assignees: AAC Optics Solutions Pte. Ltd.
- Applicants: AAC Optics Solutions Pte. Ltd.
- Inventors: Takaaki Teranishi; Lei Zhang
- Web page: https://patentgrep.com/patent/US11307388B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/62: having six components only
- G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens and a sixth lens. The camera optical lens satisfies following conditions: 4.50≤f1/f2≤8.00 and −19.00≤(R1+R2)/(R1−R2)≤−13.00, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; R1 denotes a curvature radius of an object-side surface of the first lens; and R2 denotes a curvature radius of an image-side surface of the first lens. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

## Claims

### Claim 1

A camera optical lens comprising, from an object side to an image side:
a first lens;
a second lens having a positive refractive power;
a third lens having a negative refractive power;
a fourth lens;
a fifth lens; and
a sixth lens;
wherein the camera optical lens satisfies following conditions:
4.50≤f1/f2≤8.00;
0.97≤f12/f≤1.66; and
−19.00≤(R1+R2)/(R1−R2)≤−13.00;
where
f1 denotes a focal length of the first lens;
f2 denotes a focal length of the second lens;
f denotes a focal length of the camera optical lens;
f12 denotes a combined focal length of the first lens and the second lens;
R1 denotes a curvature radius of an object-side surface of the first lens; and
R2 denotes a curvature radius of an image-side surface of the first lens.

### Claim 2 (depends on 1)

The camera optical lens according to claim 1 further satisfying following conditions:
4.55≤f1/f2≤7.93; and
−19.00≤(R1+R2)/(R1−R2)≤−13.03.

### Claim 3 (depends on 1)

The camera optical lens according to claim 1, wherein the first lens has a positive refractive power, the object-side surface of the first lens is convex in a paraxial region and the image-side surface of the first lens is concave in the paraxial region; and
the camera optical lens further satisfies following conditions:
3.70≤f1/f≤15.64; and
0.03≤d1/TTL≤0.13;
where
f denotes a focal length of the camera optical lens;
d1 denotes an on-axis thickness of the first lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 4 (depends on 3)

The camera optical lens according to claim 3 further satisfying following conditions:
5.92≤f1/f≤12.51; and
0.05≤d1/TTL≤0.10.

### Claim 5 (depends on 1)

The camera optical lens according to claim 1, wherein the second lens comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region; and
the camera optical lens further satisfies following conditions:
0.66≤f2/f≤2.41;
−3.61≤(R3+R4)/(R3−R4)≤−0.91; and
0.04≤d3/TTL≤0.15;
where
f denotes a focal length of the camera optical lens;
R3 denotes a curvature radius of the object-side surface of the second lens;
R4 denotes a curvature radius of the image-side surface of the second lens;
d3 denotes an on-axis thickness of the second lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 6 (depends on 5)

The camera optical lens according to claim 5 further satisfying following conditions:
1.06≤f2/f≤1.93;
−2.25≤(R3+R4)/(R3−R4)≤−1.14; and
0.07≤d3/TTL≤0.12.

### Claim 7 (depends on 1)

The camera optical lens according to claim 1, wherein the third lens comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region, and
the camera optical lens further satisfies following conditions:
−34.82≤f3/f≤−4.60;
2.05≤(R5+R6)/(R5−R6)≤13.77; and
0.02≤d5/TTL≤0.07;
where
f denotes a focal length of the camera optical lens;
f3 denotes a focal length of the third lens;
R5 denotes a curvature radius of the object-side surface of the third lens;
R6 denotes a curvature radius of the image-side surface of the third lens;
d5 denotes an on-axis thickness of the third lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 8 (depends on 7)

The camera optical lens according to claim 7 further satisfying following conditions:
−21.76≤f3/f≤−5.74;
3.28≤(R5+R6)/(R5−R6)≤11.02; and
0.04≤d5/TTL≤0.06.

### Claim 9 (depends on 1)

The camera optical lens according to claim 1, wherein the fourth lens has a positive refractive power, and comprises an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region, and the camera optical lens further satisfies following conditions:
0.89≤f4/f≤3.00;
1.15≤(R7+R8)/(R7−R8)≤4.15; and
0.04≤d7/TTL≤0.13;
where
f denotes a focal length of the camera optical lens;
f4 denotes a focal length of the fourth lens;
R7 denotes a curvature radius of the object-side surface of the fourth lens;
R8 denotes a curvature radius of the image-side surface of the fourth lens;
d7 denotes an on-axis thickness of the fourth lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 10 (depends on 9)

The camera optical lens according to claim 9 further satisfying following conditions:
1.42≤f4/f≤2.40;
1.84≤(R7+R8)/(R7−R8)≤3.32; and
0.07≤d7/TTL≤0.10.

### Claim 11 (depends on 1)

The camera optical lens according to claim 1, wherein the fifth lens has a negative refractive power, and comprises an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region, and
the camera optical lens further satisfies following conditions:
−3.34≤f5/f≤−1.01;
−10.42≤(R9+R10)/(R9−R10)≤−3.32; and
0.03≤d9/TTL≤0.10;
where
f denotes a focal length of the camera optical lens;
f5 denotes a focal length of the fifth lens;
R9 denotes a curvature radius of the object-side surface of the fifth lens;
R10 denotes a curvature radius of the image-side surface of the fifth lens;
d9 denotes an on-axis thickness of the fifth lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 12 (depends on 11)

The camera optical lens according to claim 11 further satisfying following conditions:
−2.09≤f5/f≤−1.26;
−6.51≤(R9+R10)/(R9−R10)≤−4.14; and
0.05≤d9/TTL≤0.08.

### Claim 13 (depends on 1)

The camera optical lens according to claim 1, wherein the sixth lens has a positive refractive power, and comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region, and
the camera optical lens further satisfies following conditions:
0.97≤f6/f≤3.36;
−443.13≤(R11+R12)/(R11−R12)≤−31.00; and
0.09≤d11/TTL≤0.29;
where
f denotes a focal length of the camera optical lens;
f6 denotes a focal length of the sixth lens;
R11 denotes a curvature radius of the object-side surface of the sixth lens;
R12 denotes a curvature radius of the image-side surface of the sixth lens;
d11 denotes an on-axis thickness of the sixth lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.

### Claim 14 (depends on 13)

The camera optical lens according to claim 13 further satisfying following conditions:
1.56≤f6/f≤2.69;
−276.96≤(R11+R12)/(R11−R12)≤−38.75; and
0.15≤d11/TTL≤0.24.

### Claim 15 (depends on 1)

The camera optical lens according to claim 1, where a total optical length TTL from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis is less than or equal to 5.05 mm.

### Claim 16 (depends on 15)

The camera optical lens according to claim 15, wherein the total optical length TTL of the camera optical lens is less than or equal to 4.82 mm.

### Claim 17 (depends on 1)

The camera optical lens according to claim 1, wherein an F number of the camera optical lens is less than or equal to 2.11.

### Claim 18 (depends on 17)

The camera optical lens according to claim 17, wherein the F number of the camera optical lens is less than or equal to 2.07.