Microobjective

Abstract

The utility model provides a microscope objective, which comprises a microscope body and a lens group arranged in the microscope body, the outer surface of the microscope body is symmetrically and convexly provided with two mounting parts, and the mounting parts are provided with grooves for locking the microscope objective; the lens group comprises seven lenses, the seven lenses are the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens in sequence from the object side to the image side, and the first lens has negative focal power; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has positive focal power; the seventh lens has positive focal power; the image side surface of the second lens is glued with the object side surface of the third lens. The image side surface of the fourth lens is glued with the object side surface of the fifth lens. By adopting a 7G optical structure, while the appearance of the lens is reduced, the distortion is small, the depth of field is small, the mounting part of the lens body is convenient for locking and attaching the lens, the arrangement of the lens is convenient, and the imaging is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, in particular to a microscope objective lens. Background Art

[0002] Microscopes are widely used in many fields, such as biology, medicine, physics, chemistry, geology, etc. Through microscopes, people can observe tiny organisms such as cells, bacteria, viruses, and the structure and morphology of microscopic substances such as metals and minerals. This is of great significance for research and exploration in the fields of medicine, biology, physics, and chemistry.

[0003] Currently, the microscope objectives on the market are large in size and heavy in weight, with large F-θ distortion. The imaging effect cannot effectively restore the actual shape of the object. Moreover, most of them are made of ordinary metal materials with average strength and poor stability, which limits their application scenarios. Utility Model Content

[0004] The utility model aims to provide a microscope objective lens to solve the technical problems of poor imaging, poor stability and limited application scenarios of existing microscope objective lenses.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The present application provides a microscope objective lens, comprising a lens body and a lens group arranged in the lens body, wherein the outer surface of the lens body is symmetrically convexly provided with two mounting parts, and the mounting parts are provided with a groove for locking the microscope objective lens; the lens group comprises seven lenses, and the seven lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens has a negative optical focal power; the second lens has a negative optical focal power; the third lens has a positive optical focal power; the fourth lens has a negative optical focal power; the fifth lens has a positive optical focal power; the sixth lens has a positive optical focal power; and the seventh lens has a positive optical focal power; the image side surface of the second lens is glued to the object side surface of the third lens, and the image side surface of the fourth lens is glued to the object side surface of the fifth lens.

[0007] In some embodiments of the present application, the object side surface of the first lens is concave, and the image side surface is concave; the object side surface of the second lens is concave, and the image side surface is concave; the object side surface of the third lens is convex, and the image side surface is convex; the object side surface of the fourth lens is concave, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is convex; the object side surface of the sixth lens is convex, and the image side surface is convex; the object side surface of the seventh lens is convex, and the image side surface is plano-convex.

[0008] In some embodiments of the present application, the mirror body includes a first part and a second part that are connected in sequence, the first lens, the second lens and the third lens are installed in the first part, and the fourth lens, the fifth lens, the sixth lens and the seventh lens are installed in the second part; the mounting portion is arranged in the first part.

[0009] In some embodiments of the present application, the first portion and the second portion are coaxially arranged, and a radial cross-section of the first portion is smaller than a radial cross-section of the second portion.

[0010] In some embodiments of the present application, the mounting portion is connected to the outer surface of the second portion.

[0011] In some embodiments of the present application, the mounting portion is configured as a semi-cylinder.

[0012] In some embodiments of the present application, a first pressure ring is disposed on the object side of the first lens, and a second pressure ring is disposed on the image side of the seventh lens.

[0013] In some embodiments of the present application, a first spacer is provided between the second lens and the third lens, a second spacer is provided between the fourth lens and the fifth lens, and a third spacer is provided between the sixth lens and the seventh lens.

[0014] In some embodiments of the present application, the microscope objective further includes a prism disposed on the image side of the seventh lens.

[0015] In some embodiments of the present application, the lens is a glass lens.

[0016] It can be seen from the above technical solutions that the embodiments of the utility model have at least the following advantages and positive effects:

[0017] The present application provides a microscope objective lens, comprising a lens body and a lens group arranged in the lens body, the outer surface of the lens body is symmetrically convexly provided with two mounting parts, and the mounting part is provided with a groove for locking the microscope objective lens; the lens group comprises seven lenses, and the seven lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side, wherein the first lens has a negative optical focal length; the second lens has a negative optical focal length; the third lens has a positive optical focal length; the fourth lens has a negative optical focal length; the fifth lens has a positive optical focal length; the sixth lens has a positive optical focal length; the seventh lens has a positive optical focal length; the image side surface of the second lens and the object side surface of the third lens are glued together, and the image side surface of the fourth lens and the object side surface of the fifth lens are glued together. By adopting the 7G optical structure, the assembly is simple, and while the lens shape is reduced, the distortion is small and the depth of field is small, and the mounting part of the lens body is convenient for locking the lens, which facilitates the placement of the lens and makes the imaging stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment provided by the utility model.

[0020] Figure 2 yes Figure 1 Sectional view in .

[0021] The following are the descriptions of the reference numerals:

[0022] 10. Mirror body; 11. Mounting part; 12. Groove; 20. Lens group; 21. First lens; 22. Second lens; 23. Third lens; 24. Fourth lens; 25. Fifth lens; 26. Sixth lens; 27. Seventh lens; 30. First pressure ring; 40. Second pressure ring; 50. First spacer ring; 60. Second spacer ring; 70. Third spacer ring; 80. Prism. DETAILED DESCRIPTION

[0023] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and described in detail in this specification. It should be understood that this description should be regarded as an exemplary description of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0024] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0025] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the utility model are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0026] See also Figure 1 and Figure 2The present application provides a microscope objective lens, which is used in combination with a lens on a microscope to achieve 8 to 10 times magnification, including a lens body 10 and a lens group 20 arranged in the lens body 10.

[0027] The mirror body 10 includes a first part and a second part which are connected in sequence. The first part and the second part are coaxially arranged, and a radial cross section of the first part is smaller than a radial cross section of the second part.

[0028] The outer surface of the mirror body 10 is symmetrically provided with two mounting parts 11. Specifically, the mounting part 11 is provided on the first part and connected to the outer surface of the second part. The mounting part 11 is a semi-cylindrical body and is provided with a groove 12 for locking the microscope objective lens, so as to facilitate locking the microscope objective lens to the microscope. It can be understood that the position and shape of the mounting part 11 are not limited thereto, as long as the setting of the mounting part 11 can achieve locking the microscope objective lens to the microscope.

[0029] The mirror body 10 is made of high-strength material that can withstand higher loads than other metal parts, so that the microscope objective lens can work stably at 0°~45° and has waterproof performance. The lens is safer and more reliable, thereby ensuring stable imaging of the lens group 20 installed in the mirror.

[0030] The lens group 20 includes seven lenses, which are the first lens 21, the second lens 22, the third lens 23, the fourth lens 24, the fifth lens 25, the sixth lens 26 and the seventh lens 27 from the object side to the image side. The first lens 21, the second lens 22 and the third lens 23 are installed in the first part of the mirror body 10, and the fourth lens 24, the fifth lens 25, the sixth lens 26 and the seventh lens 27 are installed in the second part of the mirror body 10. The lens group 20 adopts a two-head assembly design, which divides the seven lenses into two parts, and is assembled through the first part and the second part of the mirror body 10 respectively, which can more effectively control the sensitivity of the lens.

[0031] Among them, the first lens 21 has negative focal power; the second lens 22 has negative focal power; the third lens 23 has positive focal power; the fourth lens 24 has negative focal power; the fifth lens 25 has positive focal power; the sixth lens 26 has positive focal power; the seventh lens 27 has positive focal power; the image side surface of the second lens 22 is cemented with the object side surface of the third lens 23, and the image side surface of the fourth lens 24 is cemented with the object side surface of the fifth lens 25. In this way, the F-θ distortion of the microscope objective lens is small, <0.3%, and the actual shape of the object can be well restored; the depth of field is small, the chromatic aberration is small, and the visual range of the objective lens is clear and has no difference.

[0032] Specifically, the object side surface of the first lens 21 is concave, and the image side surface is concave; the object side surface of the second lens 22 is concave, and the image side surface is concave; the object side surface of the third lens 23 is convex, and the image side surface is convex; the object side surface of the fourth lens 24 is concave, and the image side surface is concave; the object side surface of the fifth lens 25 is convex, and the image side surface is convex; the object side surface of the sixth lens 26 is convex, and the image side surface is convex; the object side surface of the seventh lens 27 is convex, and the image side surface is plano-convex. A first spacer 50 is provided between the second lens 22 and the third lens 23, a second spacer 60 is provided between the fourth lens 24 and the fifth lens 25, and a third spacer 70 is provided between the sixth lens 26 and the seventh lens 27. All lenses are made of full glass material, which can achieve low distortion and large light transmission effects.

[0033] A first pressing ring 30 is provided on the object side of the first lens 21, and a second pressing ring 40 is provided on the image side of the seventh lens 27. Glue dispensing grooves for accommodating glue are respectively provided at the matching places of the first pressing ring 30, the second pressing ring 40 and the lens body 10, and the first pressing ring 30 and the second pressing ring 40 are installed by using a glue dispensing process. By adopting the inner pressing ring design, the lens as a whole is more beautiful and simple.

[0034] The microscope objective also includes a prism 80 disposed on the image side of the seventh lens 27 for redirecting or splitting light. The lens group 20 can focus and magnify light, while the prism 80 can redirect and split light without changing the focus and magnification of the light.

[0035] The present application provides a microscope objective lens, comprising a lens body 10 and a lens group 20 arranged in the lens body 10, wherein the outer surface of the lens body 10 is symmetrically provided with two mounting portions 11, and the mounting portions 11 are provided with a groove 12 for locking the microscope objective lens; the lens group 20 comprises seven lenses, and the seven lenses are, from the object side to the image side, a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26 and a seventh lens 27, wherein the first lens 21 has a negative focal power; the second lens 22 has a negative focal power; the third lens 23 has a positive focal power; the fourth lens 24 has a negative focal power; the fifth lens 25 has a positive focal power; the sixth lens 26 has a positive focal power; and the seventh lens 27 has a positive focal power; the image side surface of the second lens 22 is glued to the object side surface of the third lens 23, and the image side surface of the fourth lens 24 is glued to the object side surface of the fifth lens 25. By adopting the 7G optical structure, the assembly is simple, and while reducing the lens shape, the distortion and depth of field are small. When combined with the prism 80, 8-10 times magnification can be achieved, and the mounting portion 11 of the lens body 10 is convenient for locking the lens, which facilitates the placement of the lens and makes the imaging stable.

[0036] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A microscope objective lens, comprising a lens body and a lens group arranged in the lens body, characterized in that: The outer surface of the lens body is symmetrically provided with two mounting parts, and the mounting parts are provided with a groove for locking the microscope objective lens; the lens group includes seven lenses, and the seven lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens has a negative optical focal power; the second lens has a negative optical focal power; the third lens has a positive optical focal power; the fourth lens has a negative optical focal power; the fifth lens has a positive optical focal power; the sixth lens has a positive optical focal power; and the seventh lens has a positive optical focal power; the image side surface of the second lens is glued to the object side surface of the third lens, and the image side surface of the fourth lens is glued to the object side surface of the fifth lens.

2. The microscope objective lens according to claim 1, characterized in that The object side surface of the first lens is concave, and the image side surface is concave; the object side surface of the second lens is concave, and the image side surface is concave; the object side surface of the third lens is convex, and the image side surface is convex; the object side surface of the fourth lens is concave, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is convex; the object side surface of the sixth lens is convex, and the image side surface is convex; the object side surface of the seventh lens is convex, and the image side surface is plano-convex.

3. The microscope objective lens according to claim 2, characterized in that: The mirror body includes a first part and a second part which are connected in sequence, the first lens, the second lens and the third lens are installed in the first part, and the fourth lens, the fifth lens, the sixth lens and the seventh lens are installed in the second part; the mounting portion is arranged in the first part.

4. The microscope objective lens according to claim 3, characterized in that: The first portion and the second portion are coaxially arranged, and a radial cross section of the first portion is smaller than a radial cross section of the second portion.

5. The microscope objective lens according to claim 4, characterized in that: The mounting portion is connected to the outer surface of the second portion.

6. The microscope objective lens according to claim 5, characterized in that: The mounting portion is configured as a semi-cylinder.

7. The microscope objective lens according to claim 1, characterized in that: A first pressing ring is disposed on the object side of the first lens, and a second pressing ring is disposed on the image side of the seventh lens.

8. The microscope objective lens according to claim 1, characterized in that: A first spacer is disposed between the second lens and the third lens, a second spacer is disposed between the fourth lens and the fifth lens, and a third spacer is disposed between the sixth lens and the seventh lens.

9. The microscope objective lens according to claim 1, characterized in that: It also includes a prism arranged on the image side of the seventh lens.

10. The microscope objective lens according to claim 1, characterized in that: The lens material is glass.

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