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Imaging lens and imaging apparatus

一种成像透镜、透镜的技术，应用在安装、仪器、光学等方向，能够解决像差校正不充分、难以抑制变动等问题

Active Publication Date: 2018-04-17
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to suppress fluctuations in various aberrations during focusing with a single lens
Furthermore, in the imaging lenses described in Patent Documents 1 to 3, the correction of various aberrations is insufficient.

Method used

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  • Imaging lens and imaging apparatus
  • Imaging lens and imaging apparatus
  • Imaging lens and imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0250] Example 1 Lens data

[0251] Si

Ri

Di

Ndj

νdj

1

98.0201

3.9500

1.95375

32.32

2

265.8358

0.1000

3

106.1474

5.3200

1.55032

75.50

4

-625.6445

0.3600

5

∞

1.7300

1.56732

42.81

6

49.3830

5.9800

1.88300

39.22

7

192.1886

1.4900

8

∞

1.7000

1.63980

34.49

9

30.7780

10.1000

1.55032

75.50

10

∞

6.0100

11 (aperture)

∞

DD[11]

12

-380.4254

3.0700

1.95906

17.47

13

-70.6290

1.2200

1.85150

40.78

14

51.2612

DD[14]

15

-230.3817

5.1800

1.55032

75.50

16

-39.2300

1.6300

1.68893

31.16

17

-102.2608

0.1000

18

48.4494

8.7500

1.59282

68.62

19

-82.6540

1.8000

1.76182

26.61

20

82.6540

9.9600

21

119...

Embodiment 2

[0262] Example 2 Lens data

[0263] Si

Ri

Di

Ndj

Vdj

1

106.3848

3.5384

1.95375

32.32

2

265.6927

0.1000

3

101.7009

5.4244

1.55032

75.50

4

-630.1370

0.3749

5

∞

1.7116

1.56732

42.82

6

52.8020

5.6122

1.88300

39.22

7

199.7038

1.4361

8

∞

1.7023

1.60342

38.03

9

28.8426

10.8019

1.55032

75.50

10

∞

5.9340

11 (aperture)

∞

DD[11]

12

-327.2908

3.5884

1.84666

23.88

13

-56.2879

1.2056

1.78800

47.37

14

49.3882

DD[14]

15

-438.1328

5.2541

1.55032

75.50

16

-37.9595

1.5318

1.61293

37.01

17

-154.6615

0.1000

18

48.3799

10.1945

1.59282

68.62

19

-77.7556

1.8396

1.78470

26.29

20

77.7556

9.6988

21

1...

Embodiment 4

[0279] Example 4 Lens Data

[0280] Si

Ri

Di

Ndj

νdj

1

107.3080

4.1739

1.95375

32.32

2

456.5514

0.0916

3

91.2967

6.8951

1.53775

74.70

4

-213.6548

1.7216

1.56732

42.82

5

47.0462

5.3074

1.88300

40.76

6

109.2640

1.7362

7

211.7188

1.7016

1.63980

34.47

8

31.7422

9.0693

1.53775

74.70

9

537.2566

7.3712

10(aperture)

∞

DD[10]

11

-461.3564

2.8696

1.95906

17.47

12

-82.1465

1.2980

1.85150

40.78

13

54.5189

DD[13]

14

-356.0335

4.4264

1.53775

74.70

15

-43.5657

1.5410

1.68893

31.07

16

-121.0697

0.0457

17

47.6863

12.8904

1.59522

67.73

18

-76.6387

1.9783

1.72825

28.46

19

69.6963

6.6427

20

101.0643

6.8080

...

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PUM

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Abstract

The invention provides an imaging lens and an imaging apparatus capable of high speed focusing, capable of suppressing change of aberration in focusing and enabling good correction of the aberration.The imaging lens includes, in order from the object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a third lens group G3having a positive refractive power. During focusing, only the second lens group G2 moves in the direction of the optical axis. A lens closest to the object side in the first lens group G1 and a lensadjacent to the lens on the image side have positive refractive powers, and the second lens group G2 includes two or three lenses. Further, predetermined Conditional Expressions (1), (2), (3a), and (3b) are satisfied.

Description

technical field [0001] The present invention relates to an imaging lens suitable for electronic cameras such as digital cameras and video cameras, and an imaging device equipped with the imaging lens. Background technique [0002] Conventionally, as an imaging lens used in a camera in the above-mentioned field, an imaging lens of an inner focus system that focuses is proposed by moving a part of the lens group in the middle portion of the lens system along the optical axis direction. Compared with the whole group extension method that moves the entire lens system to focus, the inner focus method has the advantages of easy focusing operation and rapid autofocus control. For example, Patent Documents 1 to 3 below propose an imaging lens of an inner focus system that includes first to third lens groups in order from the object side, and moves the whole or a part of the second lens group to focus. [0003] Patent Document 1: Japanese Patent No. 5601598 [0004] Patent Document...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/173G02B27/64G02B9/24
CPCG02B9/24G02B15/173G02B27/646G02B13/02G02B9/14G02B13/006G02B7/04
Inventor 近藤雅人
Owner FUJIFILM CORP