Flat-field apochromatic microscope objective

An apochromatic, microscopic objective lens technology, applied in the optical field, can solve the problems such as the inability to meet the requirements of high imaging quality and large numerical aperture of microscopic objective lenses, and the small numerical aperture of microscopic objective lenses, so as to meet the requirements of mass production, structural Simple, well-designed effects

Inactive Publication Date: 2017-12-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a plan apochromatic microscope aiming at the problem that the numerical aperture of the microscopic objective lens in the prior art is small and cannot meet the requirements of high imaging quality and large numerical aperture of the microscopic objective lens in various fields. Objective lens, the large-aperture plan apochromatic microscopic objective lens proposed by the present invention can meet the requirements for microscopic objective lenses in various fields

Method used

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  • Flat-field apochromatic microscope objective
  • Flat-field apochromatic microscope objective
  • Flat-field apochromatic microscope objective

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0039] As a specific implementation, the doublet lens group G2 satisfies the following relationship:

[0040] 0.8G2 / f obj <2.5

[0041] Among them, f G2 is the focal length of the doublet lens group G2, f obj is the focal length of the plan apochromatic microscope objective.

[0042] As a specific implementation manner, the ninth lens L9 satisfies the following relationship:

[0043] -3L9 / f obj <-2.1

[0044] Among them, f L9 is the focal length of the ninth lens L9, f obj is the focal length of the plan apochromatic microscope objective.

[0045] As a specific implementation manner, the tenth lens L10 satisfies the following relational expression:

[0046] 2.44L10 / f obj <4.1

[0047] Among them, f L10 is the focal length of the tenth lens L10, f obj is the focal length of the plan apochromatic microscope objective.

[0048] By implementing the above specific implementation methods, the optimization of the plan apochromat microscope objective lens can be reali...

example 1

[0050] Example 1: Starting from the image space of the tenth lens L10, the surfaces of each lens or lens group arranged in sequence from the image space to the object space are numbered. The specific structural parameters are shown in Table 1.

[0051] Table 1

[0052] face number

Radius of curvature / mm

Thickness / mm

Refractive index

Abbe number

1

11.9308

3.4693

1.75

27.58

2

36.1812

0.4449

3

16.9237

2

1.68

31.18

4

7.3102

5.0796

5

-8.1232

1.8

1.73

28.25

6

29.7912

3.893

1.43

95.16

7

-10.1394

0.0996

8

22.4724

2.66

1.75

27.58

9

-149.0062

0.1

10

14.8331

4.7229

1.43

95.16

11

-13.1687

1.5

1.61

44.09

12

13

3.8663

1.43

95.16

13

-19.9569

0.1

14

9.2056

3.594

1.52

76.98

15

55.3775

0.1

...

example 2

[0064] Example 2: Starting from the image space of the tenth lens L10, the surfaces of each lens or lens group arranged in sequence from the image space to the object space are numbered. The specific structural parameters are shown in Table 2.

[0065] Table 2

[0066] face number

Radius of curvature / mm

Thickness / mm

Refractive index

Abbe number

1

14.8203

3.2988

1.75

27.58

2

118.6351

0.1

3

15.0857

2

1.68

31.11

4

7.7327

5.0115

5

-8.2178

1.8

1.73

28.25

6

58

3.6156

1.43

95.16

7

-9.5534

0.9936

8

15.8585

3.132

1.75

27.58

9

31.575

0.5

10

15.1442

5

1.43

95.16

11

-11.7758

1.5

1.61

44.09

12

13

3.4705

1.43

95.16

13

-20.6979

0.1

14

9.7224

2.8077

1.52

76.98

15

94.0141

0.1

16

7.008...

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Abstract

The invention relates to a flat-field apochromatic microscope objective, and belongs to the field of optical technologies. The flat-field apochromatic microscope objective comprises first to tenth lenses which are coaxially arranged in sequence from an object side to an image side, and is characterized in that the first lens is a hemispherical lens with positive focal power; the second lens is a concave-convex lens with positive focal power; the third lens and the fifth lens are biconvex lenses, the fourth lens is a biconcave lens, and the third lens, the fourth lens and the fifth lens form a three-cemented-lens group with positive focal power; the sixth lens is a biconvex lens with positive focal power; the seventh lens is a biconvex lens, the eighth lens is a biconcave lens, and the seventh lens and the eighth lens form a double-cemented-lens group with negative focal power; the ninth lens is a meniscus lens with negative focal power; and the tenth lens is a concave-convex lens with negative focal power. The flat-field apochromatic microscope objective has a large numerical aperture and a large field range, realizes a flat-field apochromatic design in a more strict sense, and is simple in structure, reasonable in design and easy to manufacture.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a plan apochromat microscope objective lens. Background technique [0002] Microscopic objective lens is an important part of optical microscope, and also the main decisive part of microscope imaging performance. At present, large-aperture and high-resolution microscopic objective lens plays an important role in biological fluorescence microscope, total internal reflection fluorescence microscope and confocal microscope. Applications, and the development trend of today's microscopic imaging technology requires a larger field of view and higher image quality for microscopic objectives. At present, there are various types of microscopic objective lenses in the world, but the numerical aperture of the dry lens that can be achieved technically is generally around 0.65, which cannot meet the requirements of high imaging quality and large numerical aperture of microscopic objective le...

Claims

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Application Information

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IPC IPC(8): G02B21/02
CPCG02B21/02
Inventor 薛金来陈长征张星祥聂婷毕国玲任建岳
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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