Microscope light collecting lens

Abstract

A microscope light collecting lens comprises a first lens group, a second lens group and a third lens group which are mutually connected in sequence, a diaphragm sheet group composed of 10 diaphragm sheets is arranged in the second lens group, compared with 12 diaphragm sheets which are conventionally used in the prior art, extrusion among the diaphragm sheets is reduced, and the diaphragm sheets are not easy to deform. Therefore, the problem of slag falling caused by friction between the diaphragm sheets is solved. A first lens group and a second lens group are respectively arranged in the first lens group and the third lens group, and by setting the center thickness of each lens in the first lens group and the second lens group and the R value of the surface of each lens, the condensation effect is improved, and the imaging definition and brightness are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of light collecting mirrors, in particular to a light collecting mirror for a microscope. Background Art

[0002] The light collector is a convex lens on the microscope, which is placed in the optical path below the objective lens and is responsible for gathering light and projecting it into the objective lens. In actual use, the clarity and brightness of the microscope imaging are usually improved by adjusting the aperture of the light bar group and cleaning the inside of the light collector. The common light bar group consists of 12 light bar pieces. When adjusted to the minimum light hole, the extrusion between the light bar pieces is large, the light hole will rebound, and the aperture of the light hole cannot be adjusted normally, affecting the imaging brightness; after a certain period of use, the friction between the light bar pieces causes the inside of the light collector to fall off, and the light collector needs to be cleaned regularly, otherwise it will affect the imaging clarity. Therefore, the number of light bar pieces plays a vital role in the quality of the light collector. At the same time, the center thickness and surface R value of each lens in the light collector are also crucial to the focusing effect of the light collector. Utility Model Content

[0003] In view of the shortcomings of the background technology, the purpose of the utility model is to provide a microscope light collecting mirror.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A microscope light collecting mirror comprises a first lens group, a second lens group and a third lens group which are connected to each other in sequence; a first lens group is arranged inside the first lens group; the second lens group comprises a first lower seat and a movable ring rotatably sleeved outside the first lower seat, a light barrier sheet group is arranged between the first lower seat and the movable ring, the light barrier sheet group consists of 10 light barrier sheets, the movable ring is transmission-connected to each of the light barrier sheets, and each of the light barrier sheets is driven by the movable ring to move and adjust the aperture of the light hole; a second lens group is arranged inside the third lens group.

[0006] Furthermore, a first lens group is provided in the first lens group, the first lens group includes an upper seat, the upper seat is provided with a first mounting hole, a first shoulder is provided on one side of the first mounting hole, the first lens group is installed in the first mounting hole, and one side of the first lens group abuts against the first shoulder; and also includes a first pressing ring, the first pressing ring presses the first lens group tightly into the first mounting hole.

[0007] Furthermore, the first lens group includes a protective glass and a first light-collecting lens, the protective glass abuts against the first shoulder, and the first pressing ring is pressed against the first light-collecting lens.

[0008] Furthermore, a first spacer is provided between the protective glass and the first light-collecting lens, and two ends of the first spacer are respectively in contact with the protective glass and the first light-collecting lens.

[0009] Furthermore, the third lens group includes a second lower seat, the second lower seat is provided with a second mounting hole, and a second shoulder is provided on one side of the second mounting hole; the second lens group is installed in the second mounting hole, and one side of the second lens group abuts against the second shoulder; and also includes a second pressing ring, which presses the second lens group tightly into the second mounting hole.

[0010] Furthermore, the second lens group includes a second light collecting lens and a third light collecting lens, the second light collecting lens abuts against the second shoulder, and the second pressing ring presses against the third light collecting lens.

[0011] Furthermore, a second spacer is provided between the protective glass and the second light collecting lens and the third light collecting lens, and two ends of the second spacer are respectively in contact with the second light collecting lens and the third light collecting lens.

[0012] Furthermore, the upper seat, the first lower seat and the second lower seat are connected to each other through threaded fitting.

[0013] Furthermore, the center thickness of the protective glass at the optical axis is 1.75-2.25 mm; the thickness of the first light collecting lens at the optical axis is 9.65-9.85 mm; the thickness of the second light collecting lens at the optical axis is 6.95-7.25 mm; and the thickness of the third light collecting lens at the optical axis is 8.80-9.05 mm.

[0014] Furthermore, the upper surface of the first light-collecting lens is convex, and the R value is 27.854-28.104mm, and the lower surface of the first light-collecting lens is a plane; the upper surface of the second light-collecting lens is convex, and the R value is 22.012-22.242mm, and the lower surface of the second light-collecting lens is concave, and the R value is 67.107-67.327mm; the upper surface of the third light-collecting lens is convex, and the R value is 27.897-28.097mm, and the lower surface of the third light-collecting lens is a plane.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model provides a microscope light collecting lens, comprising a first lens group, a second lens group and a third lens group which are sequentially connected to each other. A light barrier sheet group consisting of 10 light barrier sheets is arranged in the second lens group. Compared with the 12 light barrier sheets conventionally used in the prior art, the extrusion between the light barrier sheets is reduced, so that the problem of slag falling caused by friction between the light barrier sheets is solved.

[0017] 2. The utility model proposes a microscope light-collecting lens, in which the first lens group and the third lens group are respectively provided with a first lens group and a second lens group. By setting the center thickness of each lens in the first lens group and the R value of the lens surface, the focusing effect is improved to ensure the clarity and brightness of the image. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is an exploded view of a microscope light collecting mirror of the utility model;

[0020] Figure 2 It is a cross-sectional view of a microscope light collecting lens of the utility model;

[0021] Figure 3 It is an assembly diagram of a microscope light collecting mirror of the utility model;

[0022] In the figure, 10, the first lens group; 101, the upper seat; 1011, the first mounting hole; 1012, the first shoulder; 102, the first pressure ring; 103, the protective glass; 104, the first light-collecting lens; 105, the first spacer; 20, the second lens group; 201, the first lower seat; 202, the movable ring; 203, the light barrier group; 30, the third lens group; 301, the second lower seat; 3011, the second mounting hole; 3012, the second shoulder; 302, the second pressure ring; 303, the second spacer; 304, the second light-collecting lens; 305, the third light-collecting lens. DETAILED DESCRIPTION

[0023] Combine the following Figure 1-3 The utility model is described in detail.

[0024] A microscope light collecting mirror comprises a first lens group 10, a second lens group 20 and a third lens group 30 which are connected to each other in sequence; a first lens group is arranged in the first lens group 10; the second lens group 20 comprises a first lower seat 201 and a movable ring 202 which is rotatably sleeved outside the first lower seat 201, a light barrier sheet group 203 is arranged between the first lower seat 201 and the movable ring 202, the light barrier sheet group 203 is composed of 10 light barrier sheets, the movable ring 202 is transmission-connected to each light barrier sheet, and each light barrier sheet is driven to move and adjust the aperture of the light hole through the movable ring 202; a second lens group is arranged in the third lens group 30.

[0025] Therefore, compared with the conventional 12 light barrier sheets used in the prior art, the utility model adopts a light barrier sheet group 203 consisting of 10 light barrier sheets, and the extrusion between the light barrier sheets becomes smaller, so that the problem of slag falling caused by friction between the light barrier sheets is solved.

[0026] In this embodiment, the first lens group 10 includes an upper seat 101, the upper seat 101 is provided with a first mounting hole 1011, a first shoulder 1012 is provided on one side of the first mounting hole 1011, the first lens group is installed in the first mounting hole 1011, and one side of the first lens group abuts against the first shoulder 1012; and also includes a first pressing ring 102, the first pressing ring 102 presses the first lens group tightly in the first mounting hole 1011. Specifically, the first lens group includes a protective glass 103 and a first light collecting lens 104, the protective glass 103 abuts against the first shoulder 1012, and the first pressing ring 102 presses and abuts against the first light collecting lens 104. Further, a first spacer 105 is provided between the protective glass 103 and the first light collecting lens 104, and the two ends of the first spacer 105 abut against the protective glass 103 and the first light collecting lens 104 respectively.

[0027] In this embodiment, the third lens group 30 includes a second lower seat 301, the second lower seat 301 is provided with a second mounting hole 3011, a second shoulder 3012 is provided on one side of the second mounting hole 3011, the second lens group is installed in the second mounting hole 3011, and one side of the second lens group abuts against the second shoulder 3012; and also includes a second pressing ring 302, the second pressing ring 302 presses the second lens group tightly in the second mounting hole 3011. Specifically, the second lens group includes a second light collecting lens 304 and a third light collecting lens 305, the second light collecting lens 304 abuts against the second shoulder 3012, and the second pressing ring 302 presses and abuts against the third light collecting lens 305. Further, a second spacer 303 is provided between the protective glass 103 and the second light collecting lens 304 and the third light collecting lens 305, and the two ends of the second spacer 303 abut against the second light collecting lens 304 and the third light collecting lens 305, respectively.

[0028] In this embodiment, the upper seat 101, the first lower seat 201 and the second lower seat 301 are connected to each other through threaded fitting.

[0029] In this embodiment, the center thickness of the protective glass 103 at the optical axis is 1.75-2.25 mm; the thickness of the first light collecting lens 104 at the optical axis is 9.65-9.85 mm; the thickness of the second light collecting lens 304 at the optical axis is 6.95-7.25 mm; the thickness of the third light collecting lens 305 at the optical axis is 8.80-9.05 mm. Furthermore, the upper surface of the first light-collecting lens 104 is convex, and its R value is 27.854-28.104mm, and the lower surface of the first light-collecting lens 104 is flat; the upper surface of the second light-collecting lens 304 is convex, and its R value is 22.012-22.242mm, and the lower surface of the second light-collecting lens 304 is concave, and its R value is 67.107-67.327mmmm; the upper surface of the third light-collecting lens 305 is convex, and its R value is 27.897-28.097mm, and the lower surface of the third light-collecting lens 305 is flat.

[0030] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A microscope light collecting lens, characterized in that: It includes a first lens group, a second lens group and a third lens group which are connected in sequence; the second lens group includes a first lower seat and a movable ring rotatably sleeved outside the first lower seat, a light barrier sheet group is arranged between the first lower seat and the movable ring, the light barrier sheet group is composed of 10 light barrier sheets, the movable ring is transmission-connected to each of the light barrier sheets, and each of the light barrier sheets is driven by the movable ring to move and adjust the aperture of the light hole.

2. A microscope light collecting lens as claimed in claim 1, characterized in that: A first lens group is provided in the first lens group, and the first lens group includes an upper seat, the upper seat is provided with a first mounting hole, a first shoulder is provided on one side of the first mounting hole, the first lens group is installed in the first mounting hole, and one side of the first lens group abuts against the first shoulder; and also includes a first pressing ring, which presses the first lens group tightly into the first mounting hole.

3. A microscope light collecting lens as claimed in claim 2, characterized in that: The first lens group includes a protective glass and a first light-collecting lens. The protective glass abuts against the first shoulder, and the first pressing ring presses against the first light-collecting lens.

4. A microscope light collecting lens as claimed in claim 3, characterized in that: A first spacer is provided between the protective glass and the first light-collecting lens, and two ends of the first spacer are respectively in contact with the protective glass and the first light-collecting lens.

5. A microscope light collecting lens as claimed in claim 3, characterized in that: The third lens group includes a second lower seat, the second lower seat is provided with a second mounting hole, and a second shoulder is provided on one side of the second mounting hole; the second lens group is installed in the second mounting hole, and one side of the second lens group abuts against the second shoulder; and also includes a second pressing ring, which presses the second lens group tightly into the second mounting hole.

6. A microscope light collecting lens as claimed in claim 5, characterized in that: The second lens group includes a second light collecting lens and a third light collecting lens. The second light collecting lens abuts against the second shoulder, and the second pressing ring presses against the third light collecting lens.

7. A microscope light collecting lens as claimed in claim 6, characterized in that: A second spacer is provided between the protective glass and the second light collecting lens and the third light collecting lens, and two ends of the second spacer are respectively in contact with the second light collecting lens and the third light collecting lens.

8. A microscope light collecting lens as claimed in claim 5, characterized in that: The upper seat, the first lower seat and the second lower seat are connected to each other through threaded fitting.

9. A microscope light collecting lens as claimed in claim 6, characterized in that: The center thickness of the protective glass at the optical axis is 1.75-2.25mm; the thickness of the first light collecting lens at the optical axis is 9.65-9.85mm; the thickness of the second light collecting lens at the optical axis is 6.95-7.25mm; the thickness of the third light collecting lens at the optical axis is 8.80-9.05mm.

10. A microscope light collecting lens as claimed in claim 6, characterized in that: The upper surface of the first light-collecting lens is convex, and the R value is 27.854-28.104mm, and the lower surface of the first light-collecting lens is flat; the upper surface of the second light-collecting lens is convex, and the R value is 22.012-22.242mm, and the lower surface of the second light-collecting lens is concave, and the R value is 67.107-67.327mm; the upper surface of the third light-collecting lens is convex, and the R value is 27.897-28.097mm, and the lower surface of the third light-collecting lens is flat.

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