# US 2014/0153115 A1 · Photographing lens and electronic device

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- Number: US 2014/0153115 A1
- Document ID: US20140153115A1
- Status: Published application
- Kind: A1
- Application number: 14/096,550
- Filed: 2013-12-04
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hiroyuki Hagiwara
- Web page: https://patentgrep.com/patent/US20140153115A1

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 1/041: {Lenses}
- G02B 9/60: having five components only
- G02B 13/0055: {employing a special optical element}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A photographing lens and an electronic device including the same are provided. The photographing lens includes a first lens, a second lens, a meniscus third lens, a meniscus fourth lens, and a fifth lens. The first lens has a positive refractive power and an object side lens surface that is convex toward the object side. The second lens has negative refractive power and an image side lens surface that is convex toward the image side. The meniscus third lens has a positive refractive power and an image side lens surface that is concave toward the image side. The meniscus fourth lens has a positive refractive power and an image side lens surface that is convex toward the image side. The fifth lens has a negative refractive power and an image side lens surface that is concave toward the image side around an optical axis.

## Claims

### Claim 1

A photographing lens comprising, sequentially from an object side to an image side:
a first lens having a positive refractive power and an object side lens surface that is convex toward the object side;
a second lens having a negative refractive power and an image side lens surface that is convex toward the image side;
a meniscus third lens having a positive refractive power and an image side lens surface that is concave toward the image side;
a meniscus fourth lens having a positive refractive power and an image side lens surface that is convex toward the image side; and
a fifth lens having a negative refractive power and an image side lens surface that is concave toward the image side around an optical axis,
wherein the photographing lens satisfies the following expressions:
−3.0<(r21+r22)/(r21−r22)<−1.0, and
−10.0<(r31+r32)/(r31−r32)<−1.5,
where, “r21” denotes a paraxial radius of curvature of the object side lens surface of the second lens, “r22” denotes a paraxial radius of curvature of the image side lens surface of the second lens, “r31” denotes a paraxial radius of curvature of the object side lens surface of the third lens, and “r32” denotes a paraxial radius of curvature of the image side lens surface of the third lens.

### Claim 2 (depends on 1)

The photographing lens of claim 1, wherein the first lens and the second lens satisfy the following expressions:
0.75<f1/f<1.4, and
−2.0<f2/f<−0.7,
where, “f” denotes a focal length of the photographing lens, “f1” denotes a focal length of the first lens, and “f2” denotes a focal length of the second lens.

### Claim 3 (depends on 1)

The photographing lens of claim 1, wherein the third lens and the fourth lens satisfy the following expressions:
1.2<f3/f<3.8, and
0.4<f4/f<1.0,
where, “f” denotes a focal length of the photographing lens, “f3” denotes a focal length of the third lens, and “f4” denotes a focal length of the fourth lens.

### Claim 4 (depends on 1)

The photographing lens of claim 1, wherein the fifth lens satisfies the following expression:
−0.85<f5/f<−0.3,
where, “f” denotes a focal length of the photographing lens, and “f5” denotes a focal length of the fifth lens.

### Claim 5 (depends on 4)

The photographing lens of claim 4, wherein the fifth lens has a biconcave shape around the optical axis.

### Claim 6 (depends on 1)

The photographing lens of claim 1, wherein the image side lens surface of the second lens has no inflection point.

### Claim 7 (depends on 1)

The photographing lens of claim 1, wherein the image side lens surface of the fifth lens has at least one inflection point that is not an intersection point of the fifth lens and the optical axis.

### Claim 8 (depends on 1)

The photographing lens of claim 1, wherein the first lens, the third lens, the fourth lens, and the fifth lens are formed of the same material.

### Claim 9 (depends on 1)

The photographing lens of claim 1, wherein the photographing lens satisfies the following expression:
vd1345>50.0,
where, “vd1345” denotes an Abbe's number with respect to a d-line of the first lens, the third lens, the fourth lens, and the fifth lens.

### Claim 10 (depends on 1)

The photographing lens of claim 1, wherein the photographing lens satisfies the following expression:
vd2<25.0,
where, “vd2” denotes an Abbe's number with respect to a d-line of the second lens.

### Claim 11 (depends on 1)

The photographing lens of claim 1, wherein the photographing lens satisfies the following expression:
D34t<D3t,
where, “D34t” denotes an air-gap on the optical axis between the third lens and the fourth lens, and “D3t” denotes a thickness of the third lens on the optical axis.

### Claim 12 (depends on 1)

The photographing lens of claim 1, wherein the photographing lens satisfies the following expression:
1.0<(r41+r42)/(r41−r42)<3.0,
where, “r41” denotes a paraxial radius of curvature of the object side lens surface of the fourth lens, and “r42” denotes a paraxial radius of curvature of the image side lens surface of the fourth lens.

### Claim 13 (depends on 1)

The photographing lens of claim 1, wherein the photographing lens satisfies the following expression:
−0.8<(r51+r52)/(r51−r52)<3.0,
where, “r51” denotes a paraxial radius of curvature of the object side lens surface of the fifth lens, and “r52” denotes a paraxial radius of curvature of the image side lens surface of the fifth lens.

### Claim 14

An electronic device comprising:
a photographing lens; and
an imaging element that receives an optical image formed by the photographing lens and converts the optical image into an electrical image signal,
wherein the photographing lens comprises, sequentially from an object side to an image side,
a first lens having a positive power and a object side lens surface that is convex toward the object side,
a second lens having a negative refractive power and an image side lens surface that is convex toward the image side,
a meniscus third lens having a positive refractive power and an image side lens surface that is concave toward the image side,
a meniscus fourth lens having a positive refractive power and an image side lens surface that is convex toward the image side, and
a fifth lens having a negative refractive power and an image side lens surface that is concave toward the image side around an optical axis, and
wherein the photographing lens satisfies the following expressions:
−3.0<(r21+r22)/(r21−r22)<−1.0, and
−10.0<(r31+r32)/(r31−r32)<−1.5,
where, “r21” denotes a paraxial radius of curvature of the object side lens surface of the second lens, “r22” denotes a paraxial radius of curvature of the image side lens surface of the second lens, “r31” denotes a paraxial radius of curvature of the object side lens surface of the third lens, and “r32” denotes a paraxial radius of curvature of the image side lens surface of the third lens.

### Claim 15 (depends on 14)

The electronic device of claim 14, wherein the first lens and the second lens satisfy the following expressions:
0.75<f1/f<1.4, and
−2.0<f2/f<−0.7,
where, “f” denotes a focal length of the photographing lens, “f1” denotes a focal length of the first lens, and “f2” denotes a focal length of the second lens.

### Claim 16 (depends on 14)

The electronic device of claim 14, wherein the third lens and the fourth lens satisfy the following expressions:
1.2<f3/f<3.8, and
0.4<f4/f<1.0,
where, “f” denotes a focal length of the photographing lens, “f3” denotes a focal length of the third lens, and “f4” denotes a focal length of the fourth lens.