Flat-field apochromatic telescope system

Abstract

The flat-field apochromatic telescope system provided by the utility model comprises a lens barrel, and is characterized in that one end in the lens barrel is provided with a first lens, one side of the first lens is provided with a second lens, one side of the second lens is provided with a third lens, and the third lens is provided with a fourth lens. The first lens, the second lens and the third lens are all connected with the inner wall of the lens barrel, the other end of the interior of the lens barrel is provided with an eyepiece lens, the other end of the lens barrel is provided with sunshade cloth, and the sunshade cloth wraps the lens barrel. Through mutual cooperation of the first lens, the second lens and the third lens, the telescopic system has a relatively strong achromatic effect, the product has a good optical optimization effect when in use, and meanwhile, through arrangement of the sunshade cloth, irradiated light can be shielded, observation by a user is facilitated, and the user is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the field of telescopes, in particular to a flat-field apochromatic telescope system. Background Art

[0002] A telescope is an optical instrument that uses lenses or reflectors and other optical devices to observe distant objects. It uses the refraction of light through the lens or the reflection of light by a concave mirror to enter a small hole and converge into an image, and then pass through a magnifying eyepiece to be seen, also known as a "telescope".

[0003] Refracting telescopes are the mainstream telescopes on the market. Telescopes with this structure are simple in structure, highly reliable, and relatively temperature-resistant. However, because the refractive index of light of different wavelengths is different, white light is scattered into different colors, resulting in large chromatic aberration. In addition, most of the common telescopes on the market cannot block light, which can easily affect users' observations. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a plan-apochromatic telescope system to solve the problems of large chromatic aberration and inability to shield light in the above-mentioned prior art.

[0005] To achieve the above-mentioned object, the utility model provides a plan-apochromatic telescope system comprising: a lens barrel, characterized in that a first lens is arranged at one end inside the lens barrel, a second lens is arranged at one side of the first lens, a third lens is arranged at one side of the second lens, the first lens, the second lens and the third lens are all connected to the inner wall of the lens barrel, and an eyepiece lens is arranged at the other end inside the lens barrel;

[0006] A sunshade cloth is arranged at the other end of the lens barrel, and the sunshade cloth covers the lens barrel.

[0007] Furthermore, both sides of the first lens bulge outward to form arcuate surfaces, both sides of the second lens close to the first lens are arcuate surfaces concave inwardly, one side of the third lens close to the second lens is an arcuate surface bulging outwardly, and the other side of the third lens is an arcuate surface concave inwardly.

[0008] Furthermore, a side of the eyepiece lens close to the third lens is an outwardly convex arc surface, and the other side of the eyepiece lens is a flat surface.

[0009] Furthermore, a plurality of ribs are arranged on one side of the sunshade cloth.

[0010] Furthermore, a sliding tube is provided on the outer wall of the lens barrel, and the sliding tube can slide on the outer wall of the lens barrel, and one end of the sliding tube is connected to the umbrella rib;

[0011] A plurality of slide grooves are provided on the side wall of the sliding tube, and the slide grooves extend along the axis of the sliding tube. A rotating column is slidably provided inside the slide grooves, and the rotating column penetrates through the umbrella ribs and is connected to the umbrella ribs.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The first lens, the second lens and the third lens cooperate with each other to make the telescope system have a strong achromatic effect. This product has a good optical optimization effect when in use. At the same time, the sunshade can block the incoming light to facilitate the user's observation and prevent it from affecting the user;

[0014] Second, the sliding cylinder is provided to facilitate opening or retracting the sunshade cloth. The sliding cylinder is pushed toward the eyepiece lens, so that the sliding cylinder squeezes the umbrella ribs, and then the umbrella ribs tilt downward, thereby driving the sunshade cloth to be retracted. When in use, the sunshade cloth can be opened by pushing the sliding cylinder in the opposite direction.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of the utility model;

[0017] Figure 2 This is a second three-dimensional structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the lens barrel in the utility model;

[0019] Figure 4 It is a cross-sectional view of the sliding cylinder in the utility model.

[0020] In the figure: 1. lens barrel; 2. sliding cylinder; 3. sunshade cloth; 4. umbrella ribs; 5. first lens; 6. second lens; 7. third lens; 8. eyepiece lens; 9. slide groove; 10. rotating column. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0022] Reference Figure 1-4As shown, a plan-apochromatic telescope system comprises: a lens barrel 1, characterized in that a first lens 5 is arranged at one end inside the lens barrel 1, a second lens 6 is arranged at one side of the first lens 5, a third lens 7 is arranged at one side of the second lens 6, the first lens 5, the second lens 6, and the third lens 7 are all connected to the inner wall of the lens barrel 1, and an eyepiece lens 8 is arranged at the other end inside the lens barrel 1;

[0023] A sunshade cloth 3 is provided at the other end of the lens barrel 1, and the sunshade cloth 3 covers the lens barrel 1;

[0024] Both sides of the first lens 5 are convex outwards to form arcuate surfaces, both sides of the second lens 6 close to the first lens 5 are arcuate surfaces concave inwards, one side of the third lens 7 close to the second lens 6 is an arcuate surface convex outwards, and the other side of the third lens 7 is an arcuate surface concave inwards;

[0025] The side of the eyepiece lens 8 close to the third lens 7 is an outwardly convex arc surface, and the other side of the eyepiece lens 8 is a flat surface.

[0026] The utility model provides a technical solution, through the cooperation of the first lens 5, the second lens 6 and the third lens 7, the telescope system has a strong achromatic effect, and the product has a good optical optimization effect when in use. At the same time, the sunshade 3 can block the irradiated light, which is convenient for users to observe and prevent the user from being affected.

[0027] Preferably: a plurality of ribs 4 are arranged on one side of the sunshade cloth 3, a sliding tube 2 is arranged on the outer wall of the lens barrel 1, the sliding tube 2 can slide on the outer wall of the lens barrel 1, and one end of the sliding tube 2 is connected to the ribs 4;

[0028] A plurality of slide grooves 9 are provided on the side wall of the slide tube 2 . The slide grooves 9 extend along the axis of the slide tube 2 . A rotating column 10 is slidably provided inside the slide grooves 9 . The rotating column 10 penetrates the umbrella ribs 4 and is connected to the umbrella ribs 4 .

[0029] Specifically, the user pushes the sliding tube 2 toward the eyepiece lens 8, so that the sliding tube 2 squeezes the umbrella ribs 4, and then the umbrella ribs 4 tilt downward, driving the sunshade cloth 3 to be retracted and released to reduce the volume. When in use, the sunshade cloth 3 can be opened by pushing the sliding tube 2 in the opposite direction.

[0030] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A plan-apochromatic telescope system, comprising: The lens barrel (1) is characterized in that a first lens (5) is arranged at one end of the lens barrel (1), a second lens (6) is arranged on one side of the first lens (5), a third lens (7) is arranged on one side of the second lens (6), the first lens (5), the second lens (6) and the third lens (7) are all connected to the inner wall of the lens barrel (1), and an eyepiece lens (8) is arranged at the other end of the lens barrel (1); The other end of the lens barrel (1) is provided with a sunshade cloth (3), and the sunshade cloth (3) covers the lens barrel (1).

2. The plan-apochromatic telephoto system according to claim 1, characterized in that: Both sides of the first lens (5) are convex outwards to form arcuate surfaces, both sides of the second lens (6) close to the first lens (5) are arcuate surfaces concave inwards, one side of the third lens (7) close to the second lens (6) is an arcuate surface convex outwards, and the other side of the third lens (7) is an arcuate surface concave inwards.

3. The plan-apochromatic telescope system according to claim 1, characterized in that: The side of the eyepiece lens (8) close to the third lens (7) is an outwardly convex arc surface, and the other side of the eyepiece lens (8) is a flat surface.

4. The plan-apochromatic telephoto system according to claim 1, characterized in that: A plurality of umbrella ribs (4) are arranged on one side of the sunshade cloth (3).

5. The plan-apochromatic telephoto system according to claim 4, characterized in that: A sliding tube (2) is arranged on the outer wall of the lens barrel (1), and the sliding tube (2) can slide on the outer wall of the lens barrel (1), and one end of the sliding tube (2) is connected to the umbrella rib (4).

6. The plan-apochromatic telescope system according to claim 5, characterized in that: A plurality of slide grooves (9) are provided on the side wall of the sliding tube (2), and the slide grooves (9) extend along the axis of the sliding tube (2). A rotating column (10) is slidably provided inside the slide grooves (9), and the rotating column (10) passes through the umbrella ribs (4) and is connected to the umbrella ribs (4).

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