Four-piece type refraction telescope

Abstract

The utility model discloses a four-piece type refraction telescope, which comprises a lens barrel, a front objective lens group and a rear objective lens group, and is characterized in that the front objective lens group is arranged at one end in the lens barrel along the axial direction of the lens barrel and comprises a first lens and a second lens which are coaxially arranged; and the rear objective lens group is arranged at the other end in the lens barrel along the axial direction of the lens and comprises a third lens and a fourth lens which are coaxially arranged, and the distance between the third lens and the fourth lens is greater than the distance between the first lens and the second lens. According to the four-piece type refraction telescope, the distance between the two lenses on the image side is far larger than the distance between the two lenses on the object side, so that the hardware sensitivity of the rear objective lens group is reduced, although the overall precision is not changed, the processing requirement is reduced, the yield and the yield are improved, and the production efficiency is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of telescope technology, specifically relating to an improved four-element refracting telescope. Background Technology

[0002] A refracting telescope is a type of telescope that uses lenses as objectives and employs refractive imaging. It offers a wide field of view, high contrast, and good clarity. The thin-walled, long tube structure of a refracting telescope is not significantly different in appearance from that of Galileo a century ago. For those who desire a simple mechanical design, high reliability, and ease of use, the refracting telescope is a popular choice. Multiple lenses are arranged in a lens group within the refracting telescope. However, the distance between adjacent lenses in the lens group is usually small, which places high demands on the manufacturing process and increases production costs.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an improved four-element refracting telescope to solve the problem of excessively high production costs.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a four-element refracting telescope, including a telescope tube, a front objective lens group, and a rear objective lens group. The front objective lens group is disposed along the axial direction of the telescope tube at one end and includes a first lens and a second lens coaxially arranged. The rear objective lens group is disposed along the axial direction of the lens at the other end of the telescope tube and includes a third lens and a fourth lens coaxially arranged, and the distance between the third lens and the fourth lens is greater than the distance between the first lens and the second lens.

[0006] In one or more embodiments of this utility model, the front objective lens group and the rear objective lens assembly respectively include a front lens mount and a rear lens mount, the first lens and the second lens are fixed on the front lens mount, and the third lens and the fourth lens are fixed on the rear lens mount.

[0007] In one or more embodiments of the present invention, the lens barrel includes a main lens barrel and a connecting barrel, the connecting barrel being coaxial with and movably connected to the main lens barrel, and the front objective lens group and the rear objective lens group being respectively installed in the connecting barrel and the main lens barrel.

[0008] In one or more embodiments of this utility model, a star finder mount is provided on the outer wall of the main mirror tube.

[0009] In one or more embodiments of this utility model, a plurality of the aforementioned star-finding mirror mounts are provided on the outer wall of the main mirror tube.

[0010] In one or more embodiments of this utility model, a field plan lens is provided inside the main lens barrel, and the field plan lens is located on the side of the rear objective lens mount opposite to the front objective lens mount.

[0011] In one or more embodiments of the present invention, the lens barrel further includes a corner mirror or camera connector mounted to the end of the main lens barrel opposite to the connecting barrel.

[0012] In one or more embodiments of this utility model, the angle of the end of the camera lens connected to the camera is adjustable.

[0013] In one or more embodiments of this utility model, the fixed positions of the camera connector and the corner mirror are adjustable.

[0014] In one or more embodiments of this utility model, the main lens barrel and the connecting lens barrel are connected by a rack and pinion, and a knob is fixed on the outer wall of the main lens barrel to connect to and drive the rack and pinion.

[0015] Compared with the prior art, in the four-element refracting telescope of this invention, the distance between the two lenses on the image side is much greater than the distance between the two lenses on the object side. Therefore, the sensitivity of the rear objective lens hardware is reduced. Although the overall accuracy remains unchanged, the processing requirements are reduced, thereby improving the yield and output, and thus improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a four-piece refracting telescope in one embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of a four-piece refracting telescope with a camera connector in one embodiment of the present invention.

[0019] Figure 3 This is a cross-sectional view of a four-piece refracting telescope equipped with a corner mirror in one embodiment of the present invention.

[0020] Figure 4 This is an axial view of a four-piece refracting telescope in one embodiment of the present invention.

[0021] Explanation of key figure labels:

[0022] 100-Four-element refracting telescope, 10-Telescope tube, 11-Main telescope tube, 12-Connecting tube, 13-Finder lens mount, 14-Angle mirror, 15-Camera connector, 16-Knob, 17-Rack, 20-Front objective lens mount, 21-First lens, 22-Second lens, 23-Front objective lens mount, 30-Rear objective lens mount, 31-Third lens, 32-Fourth lens, 33-Rear objective lens mount. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0024] like Figure 1-4 As shown, a four-element refracting telescope 100 in one embodiment of the present invention includes a telescope tube 10, a front objective lens group 20, and a rear objective lens group 30. The front objective lens group 20 and the rear objective lens group 30 are arranged at both ends of the telescope tube 10 along its axial direction. The former includes a first lens 21 and a second lens 22 arranged coaxially, and the latter also includes a third lens 31 and a fourth lens 32 arranged coaxially. The four lenses constitute the optical lens system of the four-element refracting telescope 100 in this embodiment.

[0025] In this embodiment, the front objective lens group 20 and the rear objective lens group 30 employ different designs. The front objective lens group 20 is relatively small in volume, with a small distance between the first lens 21 and the second lens 22. The rear objective lens group 30, however, is much larger than the front objective lens group 20, resulting in a larger distance between the third lens 31 and the fourth lens 32. This allows for an increase in the volume of the rear objective lens group 30 and the corresponding distance between the two lenses while maintaining a relatively small overall volume of the four-element refracting telescope 100. The distance between the third lens 31 and the fourth lens 32 is significantly greater than the distance between the first lens 21 and the second lens 22 (the ratio of the two distances is greater than 10:1). By increasing the overall volume of the rear objective lens group 30, the distance between the second lens 31 and the fourth lens 32 increases, thus reducing the hardware sensitivity of the rear objective lens group 30. Although the overall precision remains unchanged, the processing requirements are reduced, thereby improving yield and output, and ultimately increasing production efficiency.

[0026] Specifically, the front objective lens group 20 and the rear objective lens group 30 respectively include a front lens mount 23 and a rear lens mount 33 installed in the lens barrel 10. The first lens 21 and the second lens 22 are fixed at both ends of the front lens mount 23 in the axial direction, while the third lens 31 and the fourth lens 32 are fixed at both ends of the rear objective lens mount 33 in the axial direction. The axial length of the rear lens mount 33 is much greater than the length of the front lens mount 23, so that the distance between the third lens 31 and the fourth lens 32 is much greater than the distance between the first lens 21 and the second lens 22.

[0027] Furthermore, the lens barrel 10 includes a main lens barrel 11 and a connecting tube 12. The front objective lens group 20 is installed in the connecting tube 12, and the rear objective lens group 30 is installed in the main lens barrel 11. The connecting tube 12 is coaxial with the main lens barrel 11 and is movably connected to the main lens barrel 11. The direction of movement is the axial direction of the main lens barrel 11.

[0028] In one embodiment, a finder scope mount 13 is provided on the main lens barrel 11 for mounting a finder scope or guide scope, etc., to meet usage requirements.

[0029] Preferably, multiple finder mirror mounts 13 are provided on the main mirror tube 11. For example Figure 1 As shown, two star-finding mounts 13 are provided on the main mirror tube 11, which can be used to install two matching mirrors, further meeting the expansion needs. At the same time, it can be used with different equatorial mounts or theodolites, thereby improving ease of use.

[0030] In one embodiment, a field-planar lens (not shown) is also provided inside the main lens barrel 11 to eliminate chromatic aberration and correct defects in the field area, improve the imaging quality at the edge of the field of view, thereby improving the photography (deep space photography, camera photography) effect and meeting the high requirements of some users.

[0031] To meet the needs of observation and photography, the telescope tube 10 also includes a corner mirror 14 or a camera connector 15 connected to the end of the main telescope tube 11 away from the connecting tube 12. The former is used for direct observation by the human eye, and the latter is used for taking pictures with an external camera.

[0032] Preferably, to improve the convenience of connecting an external camera, the angle of the camera connector 15 connected to the camera end is adjustable. By adjusting the camera connection angle, it is even more convenient for the user to connect an external camera.

[0033] Furthermore, the fixed positions of the corner mirror 14 and the camera connector 15 are adjustable, thereby further expanding the observation and external camera positions of the four-element refracting telescope 100 and further improving ease of use.

[0034] Preferably, the main lens barrel 11 and the connecting tube 12 are connected by a rack 17. A knob 16 is provided on the outer wall of the main lens barrel 11 and is connected to the rack 17. Rotating the knob 16 can drive the rack 17 to move. The rack 17 is connected to the connecting tube 12, and when it moves, it drives the connecting tube 12 to move. This driving method makes the movement of the connecting tube 12 and the front objective lens mount 20 more delicate and the adjustment accuracy higher, thereby reducing the need for repeated adjustments and the probability of such adjustments.

[0035] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A four-element refracting telescope, characterized in that, include: Lens tube; The front objective lens group is disposed at one end of the lens barrel along the axial direction of the lens barrel, and includes a first lens and a second lens coaxially disposed. The rear objective lens group is disposed at the other end of the lens barrel along the lens axis, and includes a third lens and a fourth lens arranged coaxially, wherein the distance between the third lens and the fourth lens is greater than the distance between the first lens and the second lens.

2. The four-element refracting telescope according to claim 1, characterized in that, The front objective lens group and the rear objective lens assembly each include a front lens mount and a rear lens mount, the first lens and the second lens are fixed on the front lens mount, and the third lens and the fourth lens are fixed on the rear lens mount.

3. The four-element refracting telescope according to claim 1, characterized in that, The microscope tube includes a main microscope tube and a connecting tube. The connecting tube is coaxial with the main microscope tube and movably connected to the main microscope tube. The front objective lens group and the rear objective lens group are respectively installed in the connecting tube and the main microscope tube.

4. The four-element refracting telescope according to claim 3, characterized in that, A finder's mirror mount is provided on the outer wall of the main mirror tube.

5. The four-element refracting telescope according to claim 4, characterized in that, The outer wall of the main mirror tube is provided with multiple star-finding mirror mounts.

6. The four-element refracting telescope according to claim 3, characterized in that, A field-planar lens is installed inside the main lens barrel. The field-planar lens is located on the side of the rear objective lens mount that is away from the front objective lens mount.

7. The four-element refracting telescope according to claim 3, characterized in that, The lens barrel also includes a corner mirror or camera connector installed on the end of the main lens barrel opposite to the connecting tube.

8. The four-element refracting telescope according to claim 7, characterized in that, The angle of the end of the camera connector that connects to the camera is adjustable.

9. The four-element refracting telescope according to claim 7, characterized in that, The fixed positions of the camera connector and the corner mirror are adjustable.

10. The four-element refracting telescope according to claim 3, characterized in that, The main lens barrel and the connecting lens barrel are connected by a rack and pinion, and a knob is fixed on the outer wall of the main lens barrel to connect to and drive the rack and pinion.

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