Large-aperture high-precision Cassegrain catadioptric astronomical telescope

Abstract

The utility model relates to the technical field of astronomical telescopes, in particular to a large-aperture high-precision Cassegrain catadioptric astronomical telescope, which comprises a lens cone, a primary reflector, a secondary reflector and a light-transmitting tube, the primary reflector and the secondary reflector are respectively arranged on two sides in the lens cone, the light-transmitting tube is arranged along the axial direction of the lens cone, the light-transmitting tube and the secondary reflector are coaxially arranged, and the primary reflector and the secondary reflector are coaxially arranged. The light-transmitting pipe is provided with a light path channel which is through along the axial direction of the light-transmitting pipe; and the focusing tube is arranged on the light transmission tube in a sleeving manner, and the focusing tube can slide in the axial direction relative to the light transmission tube. According to the large-aperture high-precision Cassegrain catadioptric astronomical telescope provided by the utility model, the axial movement of the main reflector is realized by driving the focusing screw shafts which are symmetrical on the two sides through the synchronous belt, so that the stress is balanced, and the inner wall of the focusing tube is attached to the outer wall of the light-transmitting tube, so that the focusing tube linearly moves by taking the light-transmitting tube as a guide, and the focusing effect is improved. And imaging drift is not easy to occur during focusing.

Description

TECHNICAL FIELD

[0001] The utility model relates to astronomical telescope technical field especially relates to large aperture high precision cassegrainian catadioptric astronomical telescope. BACKGROUND

[0002] An astronomical telescope is an optical instrument used for observing distant celestial bodies such as stars, planets, and galaxies. It helps astronomers and stargazers to make astronomical observations and research by collecting and magnifying light from celestial bodies. The core principle of an astronomical telescope is to use optical elements such as lenses or mirrors to focus light, making distant celestial bodies appear brighter and clearer.

[0003] However, existing large-aperture astronomical telescopes have large volume and heavy weight, making it difficult to move forward and backward for focusing. Traditional focusing methods cannot guarantee stability, and unbalanced forces during focusing can cause image drift. Additionally, the atmosphere is full of small temperature changes, which can amplify weather effects when using the telescope for observation. Without certain measures, temperature can reduce the accuracy and efficiency of telescope observation. Therefore, the utility model provides a large-aperture high-precision cassegrainian catadioptric astronomical telescope to solve the above technical problems. SUMMARY

[0004] To overcome the technical problems mentioned in the background art, the utility model provides a large-aperture high-precision cassegrainian catadioptric astronomical telescope.

[0005] The technical solution of the utility model is as follows: a large-aperture high-precision cassegrainian catadioptric astronomical telescope includes a lens barrel, a primary mirror, and a secondary mirror. The primary mirror and the secondary mirror are arranged on both sides of the lens barrel.

[0006] A light pipe is arranged along the axial direction of the lens barrel. The light pipe is coaxially arranged with the secondary mirror, and the light pipe has a light path channel passing through its axial direction.

[0007] A focusing tube is sleeved on the light pipe. The focusing tube can slide axially relative to the light pipe.

[0008] Focusing screw shafts are uniformly distributed around the focusing tube. The focusing screw shafts are fixedly connected to the focusing tube along the axial direction of the light pipe.

[0009] A driving member is threadedly connected to the focusing screw shafts. The driving member is powered by a power member to rotate, thereby moving the focusing screw shafts and driving the focusing tube to move axially.

[0010] The ventilation device is arranged on the rear collar, the rear collar is provided with ventilation holes on the side wall, the ventilation holes are uniformly distributed around the lens barrel, and the rear collar is also provided with a through groove.

[0011] The main reflector is sleeved on the light pipe and fixedly connected with the focusing tube, and the main reflector and the focusing tube move along the axial direction of the light pipe under the action of the driving member.

[0012] Further, the light pipe extends into the lens barrel from one end of the lens barrel and is coaxially arranged with the lens barrel.

[0013] Further, the inner wall of the focusing tube is attached to the outer wall of the light pipe, so that the focusing tube moves linearly guided by the light pipe.

[0014] Further, the focusing screw shaft is symmetrically provided with two focusing screw shafts, the driving member includes a first synchronous wheel, the first synchronous wheel is threadedly connected with the focusing screw shaft, the power member includes a second synchronous wheel, a synchronous belt and a focusing hand wheel, the second synchronous wheel is fixedly connected with the focusing hand wheel, and the first synchronous wheel and the second synchronous wheel are connected through the synchronous belt.

[0015] Further, the power member further includes a tensioning wheel and an adjusting component for adjusting the tensioning wheel, the tensioning wheel, the two first synchronous wheels and the second synchronous wheel are distributed around the focusing tube to form a prismatic shape, the tensioning wheel, the two first synchronous wheels and the second synchronous wheel are connected through the synchronous belt, and the adjusting component includes a fixed block, a movable block, a guide rod, a threaded rod and an adjusting nut.

[0016] Further, the correcting mirror is installed on one end of the lens barrel through a front collar, the focusing mirror group is installed on the other end of the lens barrel through a rear collar and is sleeved in the light pipe, the correcting mirror allows external light to pass through and be incident on the main reflector, and the light path channel of the light pipe points to the center of the correcting mirror.

[0017] Further, the ventilation device is specifically an air guiding fan.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. The large-aperture, high-precision Cassegrain catadioptric telescope provided by this utility model achieves axial movement of the main mirror by driving the dual symmetrical focusing screw shafts with a synchronous belt, thus balancing the forces. Furthermore, the inner wall of the focusing tube is in contact with the outer wall of the light-transmitting tube, allowing the focusing tube to move linearly guided by the light-transmitting tube, making it less prone to image drift during focusing.

[0020] 2. The large-aperture, high-precision Cassegrain catadioptric telescope provided by this utility model has a rear ring installed at one end of the focusing tube. Ventilation holes are provided on the side wall of the rear ring, and the ventilation holes are evenly distributed around the telescope tube to form a "through airflow" to reduce the heat generated in the optical system. This has the advantages of fast heat dissipation and low cost. A through groove is also provided on the rear ring, and a ventilation device is installed in the through groove. The ventilation device is specifically an exhaust fan. When natural ventilation is ineffective in the absence of wind or when the wind speed is low, or when there are no natural ventilation holes or the external natural wind is weak, the exhaust fan is activated to expel the hot air in the telescope tube, thereby controlling the airflow and temperature in the telescope tube to ensure the accuracy and stability of the observation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional view of the lens barrel and other components of this utility model.

[0023] Figure 3 This is a cross-sectional view of the focusing tube and light transmission tube components of this utility model.

[0024] Figure 4 This is a schematic diagram of the first and second synchronous pulleys and other components of this utility model.

[0025] Figure 5 This is another schematic diagram of the first and second synchronous pulleys and other components of this utility model.

[0026] Figure 6 This is a schematic diagram of the adjustment component of this utility model.

[0027] Reference numerals: 101, Lens tube; 102, Primary mirror; 103, Secondary mirror; 104, Front collar; 105, Correction mirror; 106, Focusing tube; 107, Light tube; 1071, Optical path channel; 108, Focusing lens group; 109, Rear collar; 1091, Ventilation hole; 1092, Through groove; 201, First synchronous pulley; 202, Tensioner pulley; 203, Adjusting nut; 204, Focusing handwheel; 205, Synchronous belt; 206, Focusing screw shaft; 207, Second synchronous pulley; 301, Fan; 401, Fixed block; 402, Movable block; 403, Guide rod; 404, Threaded rod. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings.

[0029] Large-aperture, high-precision Cassegrain catadioptric telescopes, such as Figures 1-6 As shown, the lens includes a lens barrel 101, a primary mirror 102, and a secondary mirror 103. The primary mirror 102 and secondary mirror 103 are respectively arranged on both sides of the lens barrel 101 along its axial direction. A light-transmitting tube 107 is coaxially arranged with the secondary mirror 103, and the light-transmitting tube 107 has an axially extending optical path channel 1071. A focusing tube 106 is sleeved on the light-transmitting tube 107 and can slide axially relative to the light-transmitting tube 107. Focusing screw shafts 206 are evenly distributed around the focusing tube 106 and are fixedly connected to the focusing tube 106 along the axial direction of the light-transmitting tube 107. A driving component is threadedly connected to the focusing screw shafts 206, and the driving component is powered by a power component to achieve rotation. A rear collar 109 is installed at one end of the lens barrel 101 located at the focusing tube 106. The side wall of the rear collar 109... Ventilation holes 1091 are provided, which are evenly distributed around the lens tube 101 to form a "through breeze" to reduce the heat generated in the optical system. This has the advantages of fast heat dissipation and low cost. A through groove 1092 is also provided on the rear ring 109, and a ventilation device is installed in the through groove 1092. The ventilation device is a fan 301. When natural ventilation is ineffective in the absence of wind or when the wind speed is low, or when there are no natural ventilation holes or the outside natural wind is weak, the fan 301 is activated to expel the hot air in the lens tube 101, thereby controlling the airflow and temperature in the lens tube 101 to ensure the accuracy and stability of observation. The main mirror 102 is sleeved on the light tube 107 and fixedly connected to the focusing tube 106. The main mirror 102 and the focusing tube 106 move along the axial direction of the light tube 107 under the action of the driving component.

[0030] Therefore, the power member drives the driving member to rotate, and then the focusing screw shaft 206 moves in the axial direction of the light pipe 107, and then the focusing screw shaft 206 drives the focusing tube 106 to move along the axial direction of the light pipe 107, and then drives the main reflector 102 to move to realize the focusing function. Since the focusing screw shaft 206 is uniformly distributed around the focusing tube 106, the force applied by the focusing screw shaft 206 to the focusing tube 106 is balanced, avoiding the problem of instability or deviation caused by uneven force on the focusing tube 106. Since the driving member is threadedly connected with the focusing screw shaft 206, when the driving member rotates, the meshing action of the threads can make the focusing screw shaft 206 move accurately along the axial direction, avoiding errors caused by uneven sliding. At the same time, the threaded connection has certain self-locking properties. During long-term observation, the focusing screw shaft 206 and the driving member will remain fixed, avoiding unnecessary adjustment or position change.

[0031] Further, the light pipe 107 extends from the left end of the lens barrel 101 into the lens barrel 101 and is coaxially arranged with the lens barrel 101. The inner wall of the focusing tube 106 is attached to the outer wall of the light pipe 107, so that the focusing tube 106 moves with the light pipe 107 as a guide. The outer wall of the light pipe 107 and the inner wall of the focusing tube 106 are smooth and coated with a lubricant to reduce friction and improve the smoothness of focusing.

[0032] Further, the corrector lens 105 is installed at the right end of the lens barrel 101 through the front collar 104. The corrector lens 105 allows external light to pass through and be incident on the main reflector 102. The light path channel 1071 of the light pipe 107 points to the center of the corrector lens 105. Therefore, the corrector lens 105 can correct optical aberration and also provide support for the secondary reflector 103.

[0033] Further, the focusing mirror group 108 is installed at the left end of the lens barrel 101 through the rear collar 109 and is sleeved on the left end of the light pipe 107. The focusing mirror group 108 can change the path of the light beam to improve the aberration performance of the optical system to a certain extent.

[0034] Further, the focusing screw shafts 206 are symmetrically arranged with two focusing tubes 106 as the center, the driving member comprises a first synchronous wheel 201, the first synchronous wheel 201 is rotationally connected to the rear collar 109, the first synchronous wheel 201 is threadedly connected with the focusing screw shaft 206, the power member comprises a second synchronous wheel 207, a synchronous belt 205 and a focusing hand wheel 204, the second synchronous wheel 207 is rotationally connected to the rear collar 109, the second synchronous wheel 207 is fixedly connected with the focusing hand wheel 204, the focusing hand wheel 204 penetrates through the rear collar 109 and extends to the outside of the rear collar 109, the first synchronous wheel 201 and the second synchronous wheel 207 are connected through the synchronous belt 205, the power member further comprises a tension pulley 202 and an adjusting component for adjusting the tension pulley 202, the tension pulley 202, the two first synchronous wheels 201 and the second synchronous wheel 207 are distributed to form a prismatic shape with the focusing tube 106 as the center, and the tension pulley 202, the two first synchronous wheels 201 and the second synchronous wheel 207 are connected through the synchronous belt 205.

[0035] The adjusting component comprises a fixed block 401, a movable block 402, a guide rod 403, a threaded rod 404 and an adjusting nut 203, the tension pulley 202 is fixedly connected to the movable block 402, the movable block 402 is fixedly connected to the rear collar 109, the fixed block 401 is fixedly connected with the guide rod 403 and the threaded rod 404, the movable block 402 is slidingly connected with the guide rod 403, the adjusting nut 203 is in abutment with the movable block 402, in use, the adjusting nut 203 is rotated, and then the adjusting nut 203 presses the movable block 402, so that the movable block 402 slides on the guide rod 403, and then the tension pulley 202 moves, and then the tension of the synchronous belt 205 can be adjusted.

[0036] Therefore, by rotating the focusing hand wheel 204, the second synchronous wheel 207 is rotated, the second synchronous wheel 207 drives the first synchronous wheel 201 to rotate through the synchronous belt 205, and then the focusing screw shaft 206 moves in the axial direction of the light passing tube 107, and then the focusing screw shaft 206 drives the focusing tube 106 to move along the axial direction of the light passing tube 107, and then drives the primary mirror 102 to move to realize the focusing function, since the focusing screw shafts 206 are symmetrically distributed with the focusing tube 106 as the center, the force applied by the focusing screw shafts 206 to the focusing tube 106 is balanced, avoiding the problem of instability or deviation caused by uneven force on the focusing tube 106, and since the first synchronous wheel 201 is threadedly connected with the focusing screw shaft 206, when the first synchronous wheel 201 rotates, the meshing effect of the threads can make the focusing screw shaft 206 accurately move in the axial direction, avoiding the error caused by uneven sliding, and at the same time, the threaded connection has certain self-locking property, the focusing screw shaft 206 and the first synchronous wheel 201 will remain fixed during a long observation process, avoiding unnecessary adjustment or position change.

[0037] The utility model makes further illustration in combination with specific use scene:

[0038] In use, the telescope is aimed at a target object, light is transmitted to the primary mirror 102 through the corrector 105, then the light is reflected to the secondary mirror 103 by the primary mirror 102, then the light is reflected to the light path channel 1071 of the light pipe 107 by the secondary mirror 103, then the path of the light beam is changed by the focusing mirror group 108, and the aberration performance of the optical system is improved to a certain extent. During use, the user can rotate the focusing hand wheel 204 to realize axial movement of the primary mirror 102, so as to realize focusing.

[0039] To sum up, the large-aperture high-precision Cassegrain catadioptric astronomical telescope provided by the utility model realizes axial movement of the primary mirror 102 by driving the double-side symmetrical focusing screw shaft 206 through the synchronous belt 205, so that the force is balanced, and the inner wall of the focusing tube 106 is attached to the outer wall of the light pipe 107, so that the focusing tube 106 moves linearly with the light pipe 107 as a guide, and imaging drift is not prone to occur during focusing.

[0040] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be the protection scope of the claims.

Claims

1. A large-aperture high-precision Cassegrain catadioptric astronomical telescope, comprising a lens barrel (101), a primary mirror (102) and a secondary mirror (103), the primary mirror (102) and the secondary mirror (103) are arranged on both sides of the lens barrel (101), characterized in that: a light pipe (107) is arranged along the axial direction of the lens barrel (101), the light pipe (107) is coaxially arranged with the secondary mirror (103), and the light pipe (107) has a light path channel (1071) extending through the axial direction thereof; a focusing tube (106) is sleeved on the light pipe (107), the focusing tube (106) can slide along the axial direction relative to the light pipe (107); focusing screw shafts (206) are uniformly distributed around the focusing tube (106), the focusing screw shafts (206) are fixedly connected with the focusing tube (106) along the axial direction of the light pipe (107); a driving member is threadedly connected with the focusing screw shafts (206), the driving member is powered by a power member to rotate, thereby moving the focusing screw shafts (206) to drive the focusing tube (106) to move axially; a ventilation device is installed in a through groove (1092) of a rear collar (109) installed at one end of the focusing tube (106), the rear collar (109) is provided with ventilation holes (1091) on the side wall thereof, the ventilation holes (1091) are uniformly distributed around the lens barrel (101), and the rear collar (109) is provided with the through groove (1092); wherein the primary mirror (102) is sleeved on the light pipe (107) and fixedly connected with the focusing tube (106), and the primary mirror (102) and the focusing tube (106) move along the axial direction of the light pipe (107) under the action of the driving member. The light pipe (107) extends from one end of the lens barrel (101) into the lens barrel (101) and is coaxially arranged with the lens barrel (101).

2. The large aperture high precision Cassegrainian catadioptric astronomical telescope according to claim 1, characterized in that: The inner wall of the focusing tube (106) is attached to the outer wall of the light pipe (107), so that the focusing tube (106) moves linearly along the light pipe (107) as a guide.

3. The large aperture high precision Cassegrainian catadioptric astronomical telescope according to claim 2, characterized in that: The focusing screw shafts (206) are symmetrically arranged around the focusing tube (106), the driving member comprises a first synchronous wheel (201), the first synchronous wheel (201) is threadedly connected with the focusing screw shafts (206), the power member comprises a second synchronous wheel (207), a synchronous belt (205) and a focusing hand wheel (204), the second synchronous wheel (207) is fixedly connected with the focusing hand wheel (204), and the first synchronous wheel (201) and the second synchronous wheel (207) are connected by the synchronous belt (205).

4. The large aperture high precision Cassegrainian catadioptric astronomical telescope according to claim 1, characterized in that: ​ 5. The large aperture high precision Cassegrainian catadioptric astronomical telescope according to claim 4, characterized in that: The power component further comprises a tensioning wheel (202) and an adjusting component for adjusting the tensioning wheel (202), the tensioning wheel (202), the two first synchronous wheels (201) and the second synchronous wheel (207) are distributed in a prismatic shape with the focusing tube (106) as the center, the tensioning wheel (202), the two first synchronous wheels (201) and the second synchronous wheel (207) are connected through a synchronous belt (205), the adjusting component comprises a fixed block (401), a movable block (402), a guide rod (403), a threaded rod (404) and an adjusting nut (203), the tensioning wheel (202) is fixedly connected to the movable block (402), the guide rod (403) and the threaded rod (404) are connected between the fixed block (401), the movable block (402) is slidably connected to the guide rod (403), and the adjusting nut (203) is abutted to the movable block (402).

6. The large aperture high precision Cassegrainian catadioptric astronomical telescope according to claim 1, characterized in that: Further comprising a correcting mirror (105) and a defocusing mirror group (108), the correcting mirror (105) is installed at one end of the lens barrel (101) through a front collar (104), the defocusing mirror group (108) is installed at the other end of the lens barrel (101) and is sleeved in the light pipe (107) through a rear collar (109), the correcting mirror (105) allows external light to pass through and be incident on the main mirror (102), and the light path channel (1071) of the light pipe (107) points to the center of the correcting mirror (105).

7. The large-aperture, high-precision Cassegrainian catadioptric astronomical telescope according to claim 6, characterized in that: The ventilation device is specifically an air suction fan (301).

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