Accurate micro-motion manual focusing device for astronomical photography

Abstract

The utility model relates to the technical field of focalizers, and discloses a precise micro-motion astronomical photography manual focalizer which comprises an installation box, a micrometer head is fixedly connected in the installation box, a micrometer screw is arranged in the micrometer head, and an adjusting assembly is installed on the inner wall of the installation box. The adjusting assembly comprises a fixing seat, the lower surface of the fixing seat is fixedly connected to the bottom of the inner wall of the mounting box, a sliding block is fixedly connected to the upper surface of the fixing seat, a sliding rail is slidably connected into the sliding block, a rack is fixedly connected to the upper surface of the sliding rail, and a connecting plate is fixedly connected to one side of the outer wall of the rack. According to the utility model, through linkage of the micrometer head and the slide rail, micron-order linear displacement can be realized through high-precision position identification of the micrometer head and the slide rail; the rack is matched with the lens focusing wheel, so that the micro linear displacement of the micrometer head is accurately converted into the rotation of the focusing wheel, and accurate focusing is realized; compared with traditional manual focusing, the device reduces personal errors and improves the star point focusing stability.

Description

Technical Field

[0001] This utility model relates to the field of focusing technology, and in particular to a precise micro-motion manual focusing device for astrophotography. Background Technology

[0002] A manual focuser for astrophotography is an auxiliary tool used with astrophotography equipment (such as telescopes). It is typically mounted on the telescope's focusing mechanism and allows for precise adjustment of the telescope's focal length by manual rotation or operation, ensuring the clearest possible image of the celestial object on the camera's imaging plane. The reason for using a precise manual focuser is that in astrophotography, celestial objects are vast, and even slight deviations in focus can result in blurry images. A precise focuser allows photographers to fine-tune the focal length to capture clear details and structure of celestial objects, ensuring high-quality astrophotography.

[0003] Existing focusing methods mainly include manual focusing and motorized focusing. Manual focusing is simple to operate, but requires experienced operators to accurately adjust the focus, and is prone to focus shift due to lens weight or external interference. Motorized focusing can achieve precise focusing through software, but its installation is complex, and belt tension may affect the lens optical axis. Furthermore, motorized focusing requires an external power supply and computer connection when used outdoors, increasing operational complexity. Therefore, a precise micro-motion manual focusing device for astrophotography is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a precise micro-motion manual focuser for astrophotography, aiming to improve the problem that the focusing methods used in the prior art are relatively complex and difficult to operate, which leads to a decline in photographic quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precise micro-motion astrophotography manual focuser, including a mounting box, a micrometer head fixedly connected inside the mounting box, a micrometer screw installed inside the micrometer head, and an adjustment component installed on the inner wall of the mounting box;

[0006] The adjustment assembly includes a fixed base, the lower surface of which is fixedly connected to the bottom of the inner wall of the mounting box, a slider fixedly connected to the upper surface of the fixed base, a slide rail slidably connected inside the slider, a rack fixedly connected to the upper surface of the slide rail, a connecting plate fixedly connected to one side of the outer wall of the rack, and a connecting sleeve fixedly connected to one side of the outer wall of the connecting plate.

[0007] Furthermore, the rack is internally threaded with a fixing bolt, and the outer wall of the fixing bolt is rotatably connected to the inside of the connecting plate.

[0008] Furthermore, an elastic element is engaged on one side of the outer wall of the fixing bolt, and the outer wall of the fixing bolt is rotatably connected to the inside of the fixing plate.

[0009] Furthermore, one end of the elastic element is engaged with a fixing piece two, and the fixing piece two is rotatably connected to a fixing bolt two inside.

[0010] Furthermore, the outer wall of the second fixing bolt is threaded into the inside of the mounting box, and the second fixing bolt is used to connect and fix the elastic element.

[0011] Furthermore, the outer wall of the micrometer screw is disposed through the connecting plate and the connecting sleeve, and the micrometer screw is used to drive the rack to move.

[0012] Furthermore, the toothed end of the rack is higher than the opening on the mounting box, and the rack is used to drive the focusing ring of the photographic equipment.

[0013] Furthermore, one end of the elastic element abuts against one side of the outer wall of the connecting plate, and the other end of the elastic element abuts against one side of the inner wall of the mounting box.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the focusing accuracy is significantly improved by the linkage between the micrometer head and the slide rail. The micrometer head has a high-precision position mark and can achieve linear displacement at the micrometer level. Through the cooperation of the rack and the lens focusing wheel, the tiny linear displacement of the micrometer head is accurately converted into the rotation of the focusing wheel, thus achieving precise focusing. Compared with traditional manual focusing, this device reduces human error and improves the stability of star point focusing.

[0016] 2. This invention employs a mechanical focusing method, avoiding the dependence on power supply and computer connection required by electric focusing, making focusing more flexible and particularly suitable for outdoor astrophotography. The simple installation structure allows for quick mounting on various astronomical lenses or starscopes, eliminating the need for additional complex components such as motors and pulleys, thus reducing the impact of the focusing system on the lens's optical axis. Furthermore, the device features a built-in focus-locking function, fixing the focus position after focusing to prevent focus drift caused by external forces or lens weight, thereby improving the stability of long-exposure photography. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of a precision micro-motion manual focuser for astrophotography proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the slide rail structure of a precision micro-motion manual focuser for astrophotography proposed in this utility model.

[0019] Figure 3This is a schematic diagram of the elastic component of a precision micro-motion manual focuser for astrophotography proposed in this utility model.

[0020] Legend:

[0021] 1. Mounting box; 2. Micrometer head; 3. Micrometer screw; 4. Fixing base; 5. Slider; 6. Slide rail; 7. Rack; 8. Connecting plate; 9. Connecting sleeve; 10. Fixing bolt one; 11. Fixing plate one; 12. Elastic element; 13. Fixing plate two; 14. Fixing bolt two. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 3 The present invention provides an embodiment of a precision micro-motion astrophotography manual focuser, comprising a mounting box 1, a micrometer head 2 fixedly connected inside the mounting box 1, a micrometer screw 3 disposed inside the micrometer head 2, and an adjustment component installed on the inner wall of the mounting box 1.

[0024] The adjustment assembly includes a fixed base 4, the lower surface of which is fixedly connected to the bottom of the inner wall of the mounting box 1. A slider 5 is fixedly connected to the upper surface of the fixed base 4. A slide rail 6 is slidably connected inside the slider 5. A rack 7 is fixedly connected to the upper surface of the slide rail 6. A connecting plate 8 is fixedly connected to one side of the outer wall of the rack 7. A connecting sleeve 9 is fixedly connected to one side of the outer wall of the connecting plate 8.

[0025] Specifically, the mounting box 1 provides the overall support structure for the focusing device, ensuring the stable installation of each component. A micrometer head 2 is fixedly connected inside the mounting box 1. The micrometer head 2 is used for high-precision micro-motion focusing, improving the stability and accuracy of focusing. A micrometer screw 3 is installed inside the micrometer head 2. Driven by the micrometer head 2, the micrometer screw 3 moves axially and drives the focusing mechanism for fine-tuning via an adjustment component. An adjustment component is installed on the inner wall of the mounting box 1. This component transmits and adjusts the movement of the micrometer screw 3 to ensure focusing accuracy. The adjustment component includes a fixed base 4, which provides stable support for the slider 5, allowing it to slide smoothly along a predetermined trajectory. The lower surface of the fixed base 4 is fixedly connected to the bottom of the inner wall of the mounting box 1, ensuring stable fixation of the fixed base 4 inside the mounting box 1 and improving the overall stability of the adjustment component. A sliding... Block 5 and slider 5 are used for sliding adjustment on the fixed base 4, making the focusing movement more stable and controllable. The slider 5 is internally connected to a slide rail 6, which guides the slider 5 to maintain linear movement during adjustment and avoids movement deviation that could lead to inaccurate focusing. A rack 7 is fixedly connected to the upper surface of the slide rail 6. The rack 7 meshes with the gear of the lens focusing ring to ensure that the small displacement of the micrometer screw 3 can be accurately converted into the rotational adjustment of the lens focusing ring. A connecting plate 8 is fixedly connected to one side of the outer wall of the rack 7. The connecting plate 8 supports and fixes the rack 7 to keep it stable during adjustment and ensure the accuracy of the focusing movement. A connecting sleeve 9 is fixedly connected to one side of the outer wall of the connecting plate 8. The connecting sleeve 9 cooperates with the micrometer screw 3 to effectively transmit the linear movement of the micrometer screw 3 to the rack 7, thereby achieving fine focusing and improving the focusing accuracy in astrophotography.

[0026] Reference Figure 1 , Figure 2 and Figure 3 The rack 7 has a threaded connection to a fixing bolt 10, the outer wall of which is rotatably connected to the inside of the connecting plate 8. An elastic element 12 is engaged on one side of the outer wall of the fixing bolt 10, and the outer wall of the fixing bolt 10 is rotatably connected to the inside of a fixing plate 11. One end of the elastic element 12 is engaged with a fixing plate 13, and a fixing bolt 14 is rotatably connected inside the fixing plate 13. The outer wall of the fixing bolt 14 is threaded to the inside of the mounting box 1, and the fixing bolt 14 is used to connect and fix the elastic element 12. The outer wall of the micrometer screw 3 is inserted through the inside of the connecting plate 8 and the connecting sleeve 9, and the micrometer screw 3 is used to drive the rack 7 to move. The tooth end of the rack 7 is higher than the opening on the mounting box 1, and the rack 7 is used to drive the focusing ring of the photographic equipment. One end of the elastic element 12 abuts against one side of the outer wall of the connecting plate 8, and the other end of the elastic element 12 abuts against one side of the inner wall of the mounting box 1.

[0027] Specifically, the rack 7 has a threaded connection to a fixing bolt 10, which provides a stable connection, allowing the rack 7 to move precisely during adjustment. The outer wall of the fixing bolt 10 is rotatably connected to the inside of the connecting plate 8, allowing it to rotate freely within the plate. This ensures smooth movement of the rack 7 during fine-tuning, preventing jamming and improving the stability and accuracy of focusing. An elastic element 12 is engaged on one side of the outer wall of the fixing bolt 10, providing elastic support and effectively buffering the impact of movement during adjustment. This prevents focusing errors caused by inertia and improves the stability of the focusing process. The outer wall of the fixing bolt 10 is rotatably connected to a fixing plate 1. Inside, the fixing plate 11 supports the fixing bolt 10, ensuring it doesn't wobble during rotation, making the rack 7 move more smoothly and improving focusing accuracy. One end of the elastic element 12 is engaged with the fixing plate 13, which provides additional support to keep the elastic element 12 stable during operation and ensures the connection strength of the fixing bolt 14. The fixing plate 13 is internally connected to the fixing bolt 14, which secures the overall structure, ensuring the adjustment mechanism remains stable even after prolonged use, preventing loosening from affecting the focusing effect, and improving the device's durability. The outer wall of the fixing bolt 14 is threaded into the inside of the mounting box 1, allowing the fixing bolt 14 to be securely fastened. The device is fixedly installed inside to ensure that the overall adjustment mechanism will not shift its position due to vibration or external force during operation. Fixing bolt 214 is used to connect and fix the elastic element 12, ensuring that the elastic element 12 maintains appropriate elastic rebound under stress, thereby guaranteeing the stability of the focusing process. The outer wall of the micrometer screw 3 is inserted through the connecting plate 8 and the connecting sleeve 9, allowing the micrometer screw 3 to move axially within the mounting box 1 and drive the rack 7 to move precisely via the connecting plate 8. The micrometer screw 3 drives the rack 7 to move, making the focusing adjustment more precise, achieving micron-level focal length adjustment, and improving the focusing accuracy of astrophotography. The tooth tip of the rack 7 is higher than the opening on the mounting box 1, allowing the rack 7 to... The focusing ring of the photographic equipment is tightly fitted to ensure that the minute displacement of the micrometer screw 3 can be accurately converted into the rotational adjustment of the focusing ring. The rack 7 is used to drive the focusing ring of the photographic equipment, so that the user can accurately control the movement of the focusing ring when rotating the micrometer head 2, thereby achieving fine-tuning of the focus and improving the photographic quality. One end of the elastic element 12 abuts against one side of the outer wall of the connecting plate 8, so that the elastic element 12 provides additional elastic support when the connecting plate 8 moves, ensuring that the rack 7 can remain stable during the movement and avoiding the impact of backlash on the focusing accuracy. The other end of the elastic element 12 abuts against one side of the inner wall of the mounting box 1, so that it can remain fixed under force, thereby ensuring the stable operation of the entire adjustment system and improving the reliability of the focusing process.

[0028] Working principle: When using this manual focuser for focusing, the micrometer head 2 is rotated by the user, causing the micrometer screw 3 to move axially. This movement, via the connecting plate 8 and connecting sleeve 9, drives the rack 7 to move. The rack 7 meshes with the gear of the lens focusing ring, thereby driving the focusing ring to rotate precisely, achieving fine-tuning of the focus. Because the micrometer head 2 has a 50:1 reduction ratio, the focus adjustment accuracy of the lens can be improved to the level of 0.01mm, significantly improving focusing accuracy and avoiding focusing deviations caused by hand tremors or lack of experience in traditional manual focusing methods. Furthermore, to solve the backlash problem during focusing, this device incorporates an elastic element 12 and a fixed... The fixed bolt 10 ensures that the micrometer screw 3 provides stable tension during both forward and reverse rotation, eliminating backlash caused by the reverse movement of the rack 7, thus achieving zero-backlash focusing. Simultaneously, the slider 5 slides on the fixed base 4 and is precisely guided by the slide rail 6, making the movement of the rack 7 smoother and improving the stability and consistency of the focusing process. Its installation is simple, allowing for quick fixation to various astronomical lenses or star-guided telescopes, and it can be disassembled at any time without affecting the stability of the lens's optical axis. Furthermore, this focuser has a self-locking function, allowing the user to directly fix the movement position of the rack 7 after focusing, preventing focus drift caused by equipment vibration or lens weight, and ensuring stability during long-exposure shooting.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision micro-actuated manual focus for astrophotography, comprising a mounting box (1), characterized in that: Micro head (2) is fixedly connected inside the installation box (1), the micro head (2) is provided with micro screw rod (3) inside, the adjusting assembly is installed on the inner wall of the installation box (1); The adjusting assembly includes a fixed seat (4), the lower surface of the fixed seat (4) is fixedly connected to the inner wall bottom of the installation box (1), the upper surface of the fixed seat (4) is fixedly connected with a sliding block (5), the sliding block (5) is slidably connected with a slide rail (6) inside, the slide rail (6) upper surface is fixedly connected with a rack (7), the rack (7) outer wall one side is fixedly connected with a connecting plate (8), the connecting plate (8) outer wall one side is fixedly connected with a connecting sleeve (9).

2. A precision micro-actuated manual focus for astrophotography according to claim 1, characterized in that: The fixed bolt one (10) is screwedly connected in the rack (7), and the fixed bolt one (10) is rotatably connected in the connecting plate (8).

3. A precision micro- focus astronomical photography manual focuser according to claim 2, characterized in that: The elastic piece (12) is clamped on one side of the outer wall of the fixed bolt one (10), and the fixed bolt one (10) is rotatably connected in the fixed sheet one (11).

4. A precision micro- focus astronomical photography manual focuser according to claim 3, characterized in that: The fixed sheet two (13) is clamped on one end of the elastic piece (12), and the fixed screw two (14) is rotatably connected in the fixed sheet two (13).

5. A precision micro- focus astronomical photography manual focuser according to claim 4, characterized in that: The fixed screw two (14) is screwedly connected in the installation box (1), and the fixed screw two (14) is used for connecting the elastic piece (12).

6. A precision micro- focus astronomical photography manual focuser according to claim 1, characterized in that: The micro screw rod (3) is provided in the connecting plate (8) and the connecting sleeve (9) inside, and the micro screw rod (3) is used for driving the rack (7) to move.

7. A precision micro- focus astronomical photography manual focuser according to claim 1, characterized in that: The tooth end of the rack (7) is higher than the upper opening of the installation box (1), and the rack (7) is used for driving the focusing ring of the photographic equipment.

8. A precision micro- focus astronomical photography manual focuser according to claim 3, characterized in that: One end of the elastic piece (12) abuts against one side of the outer wall of the connecting plate (8), and the other end of the elastic piece (12) abuts against one side of the inner wall of the installation box (1).

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