An optical imaging system according to an embodiment may include a lens having positive refractive power. For example, a first lens may have positive refractive power. The optical imaging system may include a lens having a significant magnitude of an Abbe number. For example, the optical imaging system may include a lens having Abbe number greater than 70. As a specific example, the Abbe number of the first lens in the optical imaging system may be greater than 70. In the optical imaging system, an air gap may be formed between lenses. For example, the plurality of lenses sequentially arranged from the object side may be arranged so as not to contact neighboring lenses. In the optical imaging system, an air gap between a first lens and a second lens may be greater than an air gap between other lenses. For example, the air gap between the first lens and the second lens (a distance from an image side surface of the first lens to an object side surface of the second lens) may be greater than 2.0 mm.

An optical imaging system according to another embodiment of the present disclosure may include a plurality of lenses sequentially arranged from an object side. For example, the optical imaging system may include a first lens, a second lens, and a third lens, sequentially arranged from the object side. A configuration of the optical imaging system is not limited to the first to third lenses. For example, the optical imaging system may include a first lens, a second lens, a third lens, and a fourth lens, sequentially arranged from the object side. As another example, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, sequentially arranged from the object side.

An optical imaging system according to another embodiment of the present disclosure may include a lens having positive refractive power. For example, the first lens may have positive refractive power. In addition, the optical imaging system may include a lens having negative refractive power. For example, the second lens may have negative refractive power. The optical imaging system may include a lens in which an object side surface is concave. For example, an object side surface of the second lens may be concave.

An optical imaging system according to this specification may include lenses of different materials. For example, the optical imaging system may include a lens formed of a glass material and a lens formed of a plastic material. The lens formed of a glass material may have a greater Abbe number, compared to a lens formed of other materials. For example, the lens formed of a glass material may have Abbe number of 70 or more. The lens formed of a glass material may be configured such that a length (or an effective radius) in a first direction, intersecting an optical axis is different from a length (or an effective radius) in a second direction, intersecting the optical axis. For example, the lens formed of a glass material may be manufactured in a form in which at least one side surface is cut (a D-cut shape). The lens formed of a glass material may be configured to have predetermined refractive power. For example, the lens formed of a glass material may have positive refractive power. The lens formed of a glass material may be disposed closest to the object side. For example, the first lens may be formed of a glass material.

An optical imaging system according to this specification may include only a D-cut lens. For example, as described above, the optical imaging system may configure only a first lens formed of a glass material in a D-cut shape while being disposed closest to an object side. Therefore, the optical imaging system according to this specification may minimize a problem of deterioration of optical performance due to X-Y imbalance of the D-cut lens.

An optical imaging system according to this specification may be configured such that an air gap is formed between a first lens and a second lens. For example, the air gap between the first lens and the second lens (a distance from an image side surface of the first lens to an object side surface of the second lens) may be 2.0 mm or more. As another example, the air gap between the first lens and the second lens may be greater than an air gap between the other lenses.

The above-described limiting conditions may enable a decrease in effective radii of lenses disposed on the image side surface of the first lens, and may minimize an effect of X-Y imbalance of the first lens on the second lens.

The optical imaging system may satisfy one or more of the following conditional expressions:

0 mm<f1

70<V1

2 mm<D12

0.5 mm<ARL1<1.0 mm

1.5<f/f1<3.0

0≤D12/f0.2

1.3Dmax1/Dmax2≤2.0

1.0|f1/f2|≤3.0

90<V1+V2

In the above conditional expressions, f is a focal length of the optical imaging system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, V1 is Abbe number of the first lens, V2 is Abbe number of the second lens, D12 is a distance from an image side surface of the first lens to an object side surface of the second lens among the plurality of lenses, ARL1 is a ratio (L1Ry/L1Rx) between an effective radius (L1Rx, or a maximum effective radius) of the first lens in a long axis direction and an effective radius (L1Ry, or a minimum effective radius) of the first lens in a short axis direction, Dmax1 is a maximum effective radius of the first lens, and Dmax2 is a maximum effective radius of the second lens.

Additionally, the optical imaging system may satisfy one or more of the following conditional expressions:

8.0 mm<f1<16 mm

70<V1<96

2.0 mm<D12<4.0 mm

0.10≤D12/f≤0.20

90<V1+V2<120

0.3<BFL/TTL<0.7

8.0 mm<BFL<18.0 mm

0.5<CT1/D12<0.9

48<NminV−NmaxV<76

43<V1/Nd1<65

10<V2/Nd2<38

10<V3/Nd3<38

0.8<TTL/f<1.0

In the above conditional expressions, BFL is a distance from an image side surface of a lens closest to an image plane to the image plane, TTL is a distance from an object side surface of the first lens to the image plane, CT1 is a thickness at a center of the first lens along an optical axis, NminV is Abbe number of a lens having the smallest refractive index, NmaxV is Abbe number of a lens having the largest refractive index, Nd1 is a refractive index of the first lens, Nd2 is a refractive index of the second lens, Nd3 is a refractive index of the third lens, V2 is Abbe number of the second lens, and V3 is Abbe number of the third lens.

Hereinafter, an embodiment of the present disclosure will be described in detail based on the accompanying illustrative drawings.

First, an optical imaging system according to a first embodiment will be described with reference to FIG. 1.

An optical imaging system 100 may include a first lens 110, a second lens 120, a third lens 130, and a fourth lens 140, sequentially arranged from an object side. The first lens 110 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 120 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 130 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The fourth lens 140 may have negative refractive power, and may have a shape in which an object side surface is convex, and an image side surface is concave.

The optical imaging system 100 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 110 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 100 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 1 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 2 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 1

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.5081
2.005
1.497
81.6
3.0
2.2

3

−310.2280
2.985

2.8
2.2

4
2nd Lens
−5.5588
0.890
1.639
23.5
1.9

5

6.9643
0.640

1.8

6
3rd Lens
11.5227
0.970
1.661
20.4
1.9

7

−11.3370
0.394

1.9

8
4th Lens
13.3793
0.750
1.544
56.0
1.8

9

11.8607
5.000

1.8

10
Filter
Infinity
0.210
1.518
64.2
2.1

11

Infinity
10.286

2.1

12
Image
Infinity
0.003

2.9

Plane

TABLE 2

Surface No.

2
3
4
5
6
7
8
9

K
0.000E+00
0.000E+00
−9.528E−01
−3.10E+00
0.000E+00
0.000E+00
4.005E−01
7.832E−01

A
0.000E+00
0.000E+00
3.277E−04
1.950E−04
−1.157E−03
−1.357E−03
−3.300E−03
−1.519E−03

B
0.000E+00
0.000E+00
1.257E−04
7.398E−04
1.511E−03
7.943E−04
−6.406E−04
−4.171E−04

C
0.000E+00
0.000E+00
1.648E−05
−1.509E−04
−8.219E−04
−5.222E−04
2.869E−05
−2.190E−04

D
0.000E+00
0.000E+00
−1.073E−05
4.045E−06
3.815E−04
3.042E−04
5.377E−06
1.371E−04

E
0.000E+00
0.000E+00
1.437E−06
4.971E−06
−1.246E−04
−1.192E−04
3.333E−06
−2.483E−05

F
0.000E+00
0.000E+00
0.000E+00
−4.709E−07
2.304E−05
2.593E−05
−7.272E−07
−6.995E−07

G
0.000E+00
0.000E+00
0.000E+00
5.484E−08
−1.198E−06
−1.968E−06
−2.002E−07
3.776E−07

H
0.000E+00
0.000E+00
0.000E+00
0.000E+00
−1.720E−07
−1.401E−07
1.310E−07
1.273E−07

J
0.000E+00
0.000E+00
0.000E+00
0.000E+00
1.959E−08
2.531E−08
−1.540E−08
−2.443E−08

An optical imaging system according to a second embodiment will be described with reference to FIG. 3.

An optical imaging system 200 may include a first lens 210, a second lens 220, and a third lens 230, sequentially arranged from an object side. The first lens 210 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is concave. The second lens 220 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 230 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex.

The optical imaging system 200 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 210 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 200 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 3 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 4 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 3

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.2024
2.000
1.459
90.2
3.0
2.1

3

48.6076
3.147

2.8
2.1

4
2nd Lens
−45.2111
0.873
1.639
23.5
1.9

5

3.8985
0.627

1.8

6
3rd Lens
23.0942
0.820
1.661
20.4
1.8

7

−8.9267
0.435

1.9

8
Filter
Infinity
0.110
1.518
64.2
1.9

9

Infinity
16.091

1.9

10
Image
Infinity
−0.003

2.9

Plane

TABLE 4

Surface No.
2
3
4
5
6
7

K
0.000E+00
0.000E+00
0.000E+00
2.509E+00
2.355E+01
2.794E-01

A
0.000E+00
0.000E+00
−7.811E-03
−1.064E-02
9.035E-04
−1.896E-03

B
0.000E+00
0.000E+00
7.713E-04
4.821E-04
7.809E-04
5.057E-04

C
0.000E+00
0.000E+00
−2.147E-05
−2.791E-04
−7.714E-04
−6.543E-04

D
0.000E+00
0.000E+00
−1.754E-05
−1.808E-05
3.735E-04
3.166E-04

E
0.000E+00
0.000E+00
2.741E-06
2.871E-06
−1.320E-04
−1.165E-04

F
0.000E+00
0.000E+00
9.233E-07
−1.943E-06
2.241E-05
2.455E-05

G
0.000E+00
0.000E+00
−1.510E-07
−3.862E-07
−7.071E-07
−2.582E-06

H
0.000E+00
0.000E+00
−6.197E-08
1.904E-07
−2.663E-07
−1.449E-08

J
0.000E+00
0.000E+00
1.164E-08
−6.499E-08
−6.562E-09
1.228E-08

An optical imaging system according to a third embodiment will be described with reference to FIG. 5.

An optical imaging system 300 may include a first lens 310, a second lens 320, a third lens 330, and a fourth lens 340, sequentially arranged from an object side. The first lens 310 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 320 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 330 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The fourth lens 340 may have positive refractive power, and may have a shape in which an object side surface is concave, and an image side surface is convex.

The optical imaging system 300 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 310 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 300 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 5 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 6 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 5

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.0260
1.982
1.497
81.6
3.2
2.2

3

−594.7929
3.210

3.0
2.2

4
2nd Lens
−12.2767
0.841
1.650
21.5
1.8

5

3.7447
1.573

1.6

6
3rd Lens
11.8280
0.694
1.661
20.4
1.8

7

−16.2362
0.282

1.6

8
Filter
−13.2916
1.069
1.518
55.7
1.6

9

−11.2048
5.000

1.6

10
Filter
Infinity
0.210
1.518
64.2
2.1

11

Infinity
8.903

2.1

12
Image
Infinity
0.000

2.8

Plane

TABLE 6

Surface No.
2
3
4
5
6
7
8
9

K
4.93E−01
0.00E+00
7.57E+00
6.33E−01
−1.62E+01
4.29E+00
−9.50E−01
4.97E+00

A
−5.04E-04
−1.69E-04
−1.42E-03
−3.84E-03
2.35E-03
1.95E-03
3.86E-04
−7.81E-04

B
3.24E-05
6.42E-04
1.92E-03
2.46E-03
5.25E-04
4.99E-06
4.19E-04
4.70E-04

C
−3.09E-06
−2.02E-04
−1.07E-03
−1.13E-03
−8.00E-04
−5.71E-04
7.75E-05
8.21E-05

D
−3.71E-07
3.49E-05
3.00E-04
3.76E-04
4.19E-04
3.75E-04
2.28E-05
−6.06E-07

E
−1.58E-08
−3.30E-06
−3.80E-05
−5.43E-05
−1.30E-04
−1.40E-04
2.91E-06
−8.33E-07

F
1.15E-08
1.56E-07
1.60E-06
−5.02E-06
2.06E-05
3.03E-05
−4.89E-07
2.22E-07

G
−6.03E-10
−2.67E-09
−6.41E-07
−5.58E-07
−1.52E-06
−3.48E-06
−1.93E-07
1.20E-08

H
−3.14E-11
−4.97E-12
−2.99E-08
4.41E-08
−2.40E-09
1.57E-07
−4.00E-08
−1.82E-08

J
1.86E-12
−8.67E-13
3.62E-08
1.37E-07
0.00E+00
−1.40E-08
2.46E-09
1.94E-10

An optical imaging system according to a fourth embodiment will be described with reference to FIG. 7.

An optical imaging system 400 may include a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, and a fifth lens 450, sequentially arranged from an object side. The first lens 410 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is concave. The second lens 420 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 430 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The fourth lens 440 may have positive refractive power, and may have a shape in which an object side surface is concave, and an image side surface is convex. The fifth lens 450 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is convex.

The optical imaging system 400 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 410 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 400 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 7 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 8 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 7

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
4.7768
2.000
1.497
81.6
3.0
2.3

3

34.5280
2.870

2.7
2.3

4
2nd Lens
−8.0313
1.322
1.639
23.5
1.9

5

15.0265
0.500

1.7

6
3rd Lens
−30.1374
1.000
1.544
56.0
1.7

7

55.3761
1.044

1.7

8
4th Lens
−89.2355
0.800
1.661
20.4
1.8

9

−9.2015
0.139

1.7

10
5th Lens
−13.8374
1.000
1.535
55.7
1.7

11

−15.4629
10.000

1.8

12
Filter
Infinity
0.210
1.518
64.2
2.3

13

Infinity
3.975

2.3

14
Image
Infinity
0.008

2.6

Plane

TABLE 8

Surface No.
2
3
4
5
6

K
0.00E+00
0.00E+00
3.28E+00
1.04E+01
8.71E+00

A
0.00E+00
0.00E+00
6.71E−04
−6.01E−04
−4.20E−05

B
0.00E+00
0.00E+00
7.14E−05
6.67E−04
1.35E−05

C
0.00E+00
0.00E+00
2.56E−05
−2.28E−05
3.84E−06

D
0.00E+00
0.00E+00
3.37E−06
2.86E−06
3.28E−08

E
0.00E+00
0.00E+00
−6.74E−07
4.38E−06
−1.37E−08

F
0.00E+00
0.00E+00
−1.65E−07
1.09E−06
−4.37E−08

G
0.00E+00
0.00E+00
2.56E−08
−2.43E−07
0.00E+00

H
0.00E+00
0.00E+00
−4.41E−09
−2.36E−07
0.00E+00

J
0.00E+00
0.00E+00
5.40E−10
4.27E−08
0.00E+00

Surface No.
7
8
9
10
11

K
−6.10E+01
0.00E+00
1.88E+01
4.56E+01
0.00E+00

A
−4.18E−05
−2.06E−03
−5.19E−04
−1.12E−02
−8.87E−03

B
1.42E−05
2.82E−03
1.80E−03
−3.82E−04
4.61E−04

C
3.39E−06
−9.11E−04
−7.19E−05
4.70E−04
−5.30E−04

D
6.46E−07
4.60E−04
3.02E−04
−8.75E−05
2.23E−04

E
−1.66E−07
−1.16E−04
−1.37E−04
1.50E−05
−2.67E−05

F
−4.15E−08
1.66E−05
3.02E−05
−5.86E−06
−5.36E−06

G
0.00E+00
−6.94E−07
−2.02E−06
−4.42E−07
9.39E−07

H
0.00E+00
−1.22E−07
−8.31E−08
4.68E−07
1.55E−07

J
0.00E+00
7.56E−09
2.39E−08
−1.05E−08
−2.65E−08

An optical imaging system according to a fifth embodiment will be described with reference to FIG. 9.

An optical imaging system 500 may include a first lens 510, a second lens 520, and a third lens 530, sequentially arranged from an object side. The first lens 510 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 520 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is convex. The third lens 530 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex.

The optical imaging system 500 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 510 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 500 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 9 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 10 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 9

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
6.8430
2.646
1.459
90.2
3.0
2.4

3

−82.1055
3.752

2.7
2.4

4
2nd Lens
−4.9166
1.155
1.639
23.5
1.9

5

−49.5389
0.343

2.0

6
3rd Lens
112.7187
1.323
1.661
20.4
2.0

7

−11.2769
0.575

2.0

8
Filter
Infinity
0.210
1.518
64.2
1.9

9

Infinity
14.496

2.0

10
Image
Infinity
0.000

2.9

Plane

TABLE 10

Surface No.
2
3
4
5
6
7

K
0.000E+00
0.000E+00
2.139E+00
0.000E+00
0.000E+00
−1.93E+01

A
0.000E+00
0.000E+00
4.117E-03
−2.629E-04
8.107E-04
3.976E-04

B
0.000E+00
0.000E+00
2.203E-04
−1.703E-05
1.663E-04
2.564E-04

C
0.000E+00
0.000E+00
4.423E-05
1.888E-05
−1.091E-04
−8.718E-05

D
0.000E+00
0.000E+00
−1.226E-06
1.990E-06
3.540E-05
2.624E-05

E
0.000E+00
0.000E+00
−3.830E-07
1.631E-07
−4.746E-06
−4.965E-06

F
0.000E+00
0.000E+00
1.320E-07
1.137E-07
8.162E-07
7.533E-07

G
0.000E+00
0.000E+00
2.687E-08
7.319E-08
−3.187E-09
−3.884E-08

H
0.000E+00
0.000E+00
−1.996E-09
0.000E+00
−2.132E-09
1.293E-10

J
0.000E+00
0.000E+00
4.672E-10
0.000E+00
−8.327E-11
4.167E-11

An optical imaging system according to a sixth embodiment will be described with reference to FIG. 11.

An optical imaging system 600 may include a first lens 610, a second lens 620, and a third lens 630, sequentially arranged from an object side. The first lens 610 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 620 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 630 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex.

The optical imaging system 600 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 610 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 600 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 11 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 12 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 11

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
6.6210
2.646
1.487
70.4
3.0
2.0

3

−30.5636
3.146

2.7
2.0

4
2nd Lens
−5.4199
1.155
1.639
23.5
2.0

5

13.5840
1.091

1.9

6
3rd Lens
28.0795
1.323
1.661
20.4
2.0

7

−11.8054
0.575

2.0

8
Filter
Infinity
0.210
1.518
64.2
2.0

9

Infinity
15.187

2.0

10
Image
Infinity
0.000

2.9

Plane

TABLE 12

Surface No.
2
3
4
5
6
7

K
0.000E+00
0.000E+00
1.943E+00
0.000E+00
0.000E+00
−6.62E+00

A
−3.585E-05
1.423E-04
5.415E-03
2.062E-03
−4.541E-04
−2.285E-04

B
4.347E-07
9.174E-06
1.034E-04
1.651E-04
2.930E-04
1.630E-04

C
1.068E-07
1.754E-07
2.831E-05
3.966E-05
−8.245E-05
−7.753E-05

D
9.851E-09
−7.300E-09
−1.106E-06
6.346E-06
3.775E-05
2.877E-05

E
2.089E-10
−5.664E-10
4.297E-08
5.052E-07
−4.889E-06
−4.739E-06

F
−3.781E-11
−1.538E-11
1.091E-07
3.101E-08
6.676E-07
7.175E-07

G
−4.293E-12
3.128E-11
−3.164E-08
−1.994E-08
−6.085E-08
−5.345E-08

H
−5.507E-15
1.755E-12
6.134E-10
0.000E+00
1.273E-10
−7.297E-11

J
7.087E-14
−1.071E-13
4.672E-10
0.000E+00
−8.327E-11
4.167E-11

An optical imaging system according to a seventh embodiment will be described with reference to FIG. 13.

An optical imaging system 700 may include a first lens 710, a second lens 720, a third lens 730, and a fourth lens 740, sequentially arranged from an object side. The first lens 710 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 720 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 730 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The fourth lens 740 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave.

The optical imaging system 700 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 710 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 700 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 13 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 14 illustrates aspherical surface values of the optical imaging system according to the present embodiment.

TABLE 13

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.3995
2.005
1.497
81.6
3.0
2.3

3

−300.7225
2.837

2.8
2.3

4
2nd Lens
−7.3685
0.890
1.671
19.4
1.9

5

6.6287
0.835

1.8

6
3rd Lens
10.5231
0.970
1.535
56.1
1.8

7

−7.1894
0.150

1.9

8
4th Lens
−12.7341
0.800
1.671
19.4
2.0

9

34.8754
5.000

2.0

10
Filter
Infinity
0.110
1.518
64.2
2.3

11

Infinity
10.057

2.3

12
Image
Infinity
0.002

2.9

Plane

TABLE 14

Surface No.
2
3
4
5
6
7
8
9

K
0.00E+00
0.00E+00
−2.18E-01
−7.72E-01
0.00E+00
0.00E+00
−1.72E+01
1.07E+02

A
0.00E+00
0.00E+00
5.40E-06
1.25E-03
−1.94E-03
−1.88E-03
8.50E-04
2.05E-03

B
0.00E+00
0.00E+00
1.12E-04
7.44E-04
1.12E-03
7.37E-04
1.34E-04
1.13E-04

C
0.00E+00
0.00E+00
−2.63E-05
−1.57E-04
−8.07E-04
−6.00E-04
4.28E-06
−2.26E-04

D
0.00E+00
0.00E+00
2.28E-07
3.03E-06
3.70E-04
3.06E-04
−8.53E-07
1.40E-04

E
0.00E+00
0.00E+00
3.25E-07
4.14E-07
−1.28E-04
−1.19E-04
−4.40E-07
−3.00E-05

F
0.00E+00
0.00E+00
0.00E+00
1.77E-07
2.27E-05
2.53E-05
−1.18E-07
−2.01E-06

G
0.00E+00
0.00E+00
0.00E+00
3.02E-08
−1.16E-06
−2.08E-06
3.18E-08
1.01E-06

H
0.00E+00
0.00E+00
0.00E+00
0.00E+00
−1.78E-07
−1.23E-07
4.20E-09
1.12E-07

J
0.00E+00
0.00E+00
0.00E+00
0.00E+00
2.10E-08
2.50E-08
−5.47E-11
−3.45E-08

An optical imaging system according to an eighth embodiment will be described with reference to FIG. 15.

An optical imaging system 800 may include a first lens 810, a second lens 820, a third lens 830, and a fourth lens 840, sequentially arranged from an object side. The first lens 810 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The second lens 820 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 830 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The fourth lens 840 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex.

The optical imaging system 800 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 810 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 800 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 15 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 16 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 15

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.3995
2.005
1.497
81.6
3.0
2.0

3

−300.7225
2.837

2.8
2.0

4
2nd Lens
−7.3685
0.890
1.639
23.5
1.9

5

6.6287
0.835

1.8

6
3rd Lens
−34.8754
0.800
1.635
23.9
1.8

7

12.7341
0.150

1.9

8
4th Lens
7.1894
0.970
1.661
20.4
2.0

9

−10.5231
5.000

2.0

10
Filter
Infinity
0.110
1.518
64.2
2.3

11

Infinity
11.091

2.3

12
Image
Infinity
0.002

2.9

Plane

TABLE 16

Surface No.
2
3
4
5
6
7
8
9

K
0.00E+00
0.00E+00
−2.18E-01
−7.72E-01
0.00E+00
−1.72E+01
0.00E+00
0.00E+00

A
0.00E+00
0.00E+00
5.40E-06
4.70E-04
−3.89E-03
−1.24E-02
−7.56E-03
1.94E-03

B
0.00E+00
0.00E+00
1.12E-04
5.66E-04
−4.30E-04
−4.20E-03
−5.72E-03
−1.12E-03

C
0.00E+00
0.00E+00
−2.63E-05
−2.15E-04
1.49E-04
3.43E-03
5.84E-03
8.07E-04

D
0.00E+00
0.00E+00
2.28E-07
−9.60E-06
−1.52E-04
−8.86E-04
−2.84E-03
−3.70E-04

E
0.00E+00
0.00E+00
3.25E-07
−1.94E-07
2.89E-05
−1.40E-04
7.96E-04
1.28E-04

F
0.00E+00
0.00E+00
0.00E+00
1.99E-07
1.67E-06
1.71E-04
−7.15E-05
−2.27E-05

G
0.00E+00
0.00E+00
0.00E+00
−5.02E-08
−1.23E-06
−4.44E-05
−1.78E-05
1.16E-06

H
0.00E+00
0.00E+00
0.00E+00
−1.25E-17
−1.12E-07
3.88E-06
4.67E-06
1.78E-07

J
0.00E+00
0.00E+00
0.00E+00
−3.92E-19
3.45E-08
5.47E-11
−2.99E-07
−2.10E-08

An optical imaging system according to a ninth embodiment will be described with reference to FIG. 17.

An optical imaging system 900 may include a first lens 910, a second lens 920, a third lens 930, and a fourth lens 940, sequentially arranged from an object side. The first lens 910 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is concave. The second lens 920 may have negative refractive power, and may have a shape in which an object side surface is concave, and an image side surface is concave. The third lens 930 may have positive refractive power, and may have a shape in which an object side surface is convex, and an image side surface is convex. The fourth lens 940 may have negative refractive power, and may have a shape in which an object side surface is convex, and an image side surface is concave.

The optical imaging system 900 may include a lens formed of a plastic material and a lens formed of a glass material. For example, the first lens 910 may be formed of a glass material, and remaining lenses may be formed of a plastic material.

The optical imaging system 900 may further include a filter IF and an image plane IP.

The filter IF may be disposed in front of the image plane IP to block infrared rays included in incident light. The image plane IP may provide a space for imaging light refracted by lenses. The image plane IP may be formed on an image sensor IS. For example, the image plane IP may be formed on one surface of the image sensor IS. The image plane IP may not be necessarily formed on the image sensor IS. For example, the image plane IP may be formed on any type of member or device capable of converging an optical signal, such as an image film or the like.

Table 17 illustrates properties of lenses of the optical imaging system according to the present embodiment, and Table 18 illustrates aspheric surface values of the optical imaging system according to the present embodiment.

TABLE 17

Effective

Radius

Surface

Curvature
Thickness/
Refractive

(Long Axis
Short Axis

No.
Component
Radius
Distance
Index
Abbe No.
Radius)
Radius

1

Infinity
0.000

2
1st Lens
5.3597
1.930
1.497
81.6
3.0
2.2

3

334.1444
3.247

2.8
2.2

4
2nd Lens
−7.8458
0.800
1.639
23.5
1.9

5

5.7002
0.552

1.8

6
3rd Lens
11.5227
0.970
1.661
20.4
1.9

7

−11.3370
0.394

1.9

8
4th Lens
13.3793
0.750
1.544
56.0
1.8

9

11.8607
5.000

1.8

10
Filter
Infinity
0.210
1.518
64.2
2.1

11

Infinity
10.275

2.1

12
Image
Infinity
0.005

2.9

Plane

TABLE 19

Surface No.
2
3
4
5
6
7
8
9

K
0.00E+00
0.00E+00
0.00E+00
0.00E+00
0.00E+00
0.00E+00
4.00E-01
7.83E-01

A
0.00E+00
0.00E+00
−5.01E-03
−6.64E-03
−1.16E-03
−1.36E-03
−3.30E-03
−1.52E-03

B
0.00E+00
0.00E+00
7.89E-04
1.50E-03
1.51E-03
7.94E-04
−6.41E-04
−4.17E-04

C
0.00E+00
0.00E+00
9.71E-05
−1.50E-04
−8.22E-04
−5.22E-04
2.87E-05
−2.19E-04

D
0.00E+00
0.00E+00
−7.19E-05
−1.74E-05
3.82E-04
3.04E-04
5.38E-06
1.37E-04

E
0.00E+00
0.00E+00
1.33E-05
6.09E-06
−1.25E-04
−1.19E-04
3.33E-06
−2.48E-05

F
0.00E+00
0.00E+00
−8.27E-07
0.00E+00
2.30E-05
2.59E-05
−7.27E-07
−7.00E-07

G
0.00E+00
0.00E+00
0.00E+00
0.00E+00
−1.20E-06
−1.97E-06
−2.00E-07
3.78E-07

H
0.00E+00
0.00E+00
0.00E+00
0.00E+00
−1.72E-07
−1.40E-07
1.31E-07
1.27E-07

J
0.00E+00
0.00E+00
0.00E+00
0.00E+00
1.96E-08
2.53E-08
−1.54E-08
−2.44E-08

Tables 19 and 20 illustrate optical characteristic values of the optical imaging systems according to the first to ninth embodiments. For reference, in Table 18, ih is a diagonal length of the upper surface.

TABLE 19

1^st
2^nd
3^rd
4^th
5^th

Embodiment
Embodiment
Embodiment
Embodiment
Embodiment

f
27.200
27.200
27.000
27.000
25.000

f1
10.912
12.511
10.039
10.911
13.891

f2
−4.707
−5.578
−4.325
−8.012
−8.629

f3
8.794
9.840
10.455
−35.728
15.575

f4
−232.555
—
113.181
15.459
—

f5
—
—
—
−313.183
—

TTL
24.133
24.100
23.765
24.867
24.500

ih
5.800
5.800
5.540
5.120
5.800

BFL
10.289
16.632
8.903
15.331
15.281

6^th
7^th
8^th
9^th

Embodiment
Embodiment
Embodiment
Embodiment

f
27.000
27.200
25.800
27.200

f1
11.441
10.696
10.696
10.939

f2
−5.922
−5.068
−5.329
−5.050

f3
12.742
8.139
−14.595
8.794

f4
—
−13.800
6.606
−232.555

f5
—
—
—
—

TTL
25.333
23.657
24.691
24.133

ih
5.800
5.800
5.800
5.800

BFL
15.972
10.059
11.093
10.280

Tables 20 and 21 illustrate conditional expression values of the optical imaging systems according to the first to ninth embodiments.