A cassegrain telescope

Abstract

This invention relates to the field of optical telescope technology and discloses a Cassegrain telescope, including a primary mirror assembly, a secondary mirror assembly, a connecting assembly, a telescope top plate, and a telescope base plate; the primary mirror assembly is located on the side of the telescope base plate, and the secondary mirror assembly is located on the side of the telescope top plate. Both the primary and secondary mirrors are made of microcrystalline glass, resulting in minimal surface deformation under environmental changes and maintaining stable optical performance. The carbon fiber support rod of the connecting assembly is made of carbon fiber, which has a low coefficient of thermal expansion and high length stability, thus preventing deformation of the primary and secondary mirror surfaces and relative position shifts caused by environmental temperature changes. The leveling triangle plate is fixed to the telescope base plate, and the secondary mirror fixing plate is fixed to the telescope top plate using locking screws. The clamps of the carbon fiber rod assembly, once locked, limit the relative distance between the primary and secondary mirrors. This multi-stage fixing structure ensures the overall stability of the telescope structure and effectively prevents position shifts during use.

Description

Technical Field

[0001] This invention relates to the field of optical telescope technology, specifically a Cassegrain telescope. Background Technology

[0002] The Cassegrain telescope is widely used in astronomical observation, space exploration and other fields due to its compact structure, long focal length and good imaging effect.

[0003] However, in practical use, traditional Cassegrain telescopes are prone to deformation of the primary and secondary mirror surfaces due to changes in environmental factors such as temperature and humidity. Furthermore, the relative positions of the primary and secondary mirrors are easily shifted, leading to changes in the telescope's focal plane and a significant decrease in image quality. Simultaneously, the adjustment mechanisms of traditional Cassegrain telescopes are relatively simple, making it difficult to achieve precise adjustments over a wide range and in multiple dimensions. Even after adjustment, it is difficult to maintain the stability of their relative positions, failing to meet the demands of high-precision observations. Therefore, developing a Cassegrain telescope with high thermal stability, high structural stability, and flexible adjustment has become an urgent need in the industry. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a Cassegrain telescope that overcomes these deficiencies and offers a highly stable Cassegrain telescope. Through material selection and structural optimization, this telescope effectively improves thermal and structural stability. Furthermore, it incorporates a multi-level adjustment structure to achieve flexible adjustment and precise fixation of the primary and secondary mirrors.

[0005] (II) Technical Solution To achieve the aforementioned goal of facilitating multi-level adjustment of optical telescopes, the present invention provides the following technical solution: a Cassegrain telescope, comprising a primary mirror assembly, a secondary mirror assembly, a connecting assembly, a telescope top plate, and a telescope bottom plate; the primary mirror assembly is disposed on the side of the telescope bottom plate, the secondary mirror assembly is disposed on the side of the telescope top plate, and the connecting assembly connects the telescope top plate and the telescope bottom plate; The primary mirror assembly includes a primary mirror, a leveling triangle, and a primary mirror optical tube. The primary mirror is made of microcrystalline glass. The primary mirror is mounted on the leveling triangle. The lower end of the primary mirror optical tube is provided with an external thread. The primary mirror optical tube and the leveling triangle are engaged by a threaded pair. The primary mirror is clamped between the primary mirror optical tube and the leveling triangle. The secondary mirror assembly includes a secondary mirror, a secondary mirror fixing plate, and a secondary mirror light shield. The secondary mirror is made of microcrystalline glass. The secondary mirror is fixed to the secondary mirror fixing plate by three secondary mirror support arms that are circumferentially and equally spaced. Three primary mirror locking screws and three primary mirror adjusting screws are provided between the leveling triangle plate and the telescope base plate. Three secondary mirror locking screws and three secondary mirror adjusting screws are provided between the secondary mirror fixing plate and the telescope top plate. The connecting assembly is a carbon fiber rod assembly, including a carbon fiber support rod, a carbon fiber rod connector, a single-head clamp, and a double-head clamp. The carbon fiber support rod is made of carbon fiber. The carbon fiber rod connector is bonded to both ends of the carbon fiber support rod. The carbon fiber rod connector has a ball-head structure, which is respectively clamped and engaged with the single-head clamp and the double-head clamp. The single-head clamp and the double-head clamp are respectively connected to the telescope base plate and the telescope top plate.

[0006] Preferably, it also includes an aperture stop, a primary mirror shading tube, an aperture stop and collimating lens mounting tube, and a collimating lens. The aperture stop is located between the secondary mirror shading tube and the primary mirror shading tube. The collimating lens is installed inside the aperture stop and collimating lens mounting tube, which is located on the side of the telescope base plate.

[0007] Preferably, it also includes a pin, which is disposed between the top plate of the telescope and the secondary mirror fixing plate.

[0008] (III) Beneficial Effects Compared with the prior art, the present invention provides a Cassegrain telescope, which has the following beneficial effects: 1. Both the primary and secondary mirrors are made of microcrystalline glass, which minimizes surface changes when the environment changes, maintaining stable optical performance; the carbon fiber support rods of the connecting components are made of carbon fiber, which has a low coefficient of thermal expansion and high length stability, thus avoiding deformation of the primary and secondary mirror surfaces and relative position shifts caused by changes in ambient temperature from a material perspective.

[0009] 2. The primary mirror is fixed to the leveling triangle plate by a threaded clamp, and the secondary mirror is fixed to the secondary mirror fixing plate by adhesive bonding, ensuring a solid foundation. The leveling triangle plate is fixed to the telescope base plate, and the secondary mirror fixing plate is fixed to the telescope top plate by locking screws. After the clamp of the carbon fiber rod assembly is locked, the relative distance between the primary and secondary mirrors can be limited. The multi-level fixing structure ensures the stability of the overall telescope structure and effectively avoids positional shift during use.

[0010] 3. A multi-level adjustment structure combining wide-range adjustment and precise fine-tuning is designed. By using the ball joint and clamp of the carbon fiber rod assembly, a wide range of adjustment of the relative distance and angle between the primary and secondary mirrors can be achieved. By using the combination of three adjustment set screws and three locking screws, precise attitude fine-tuning of the primary and secondary mirrors can be achieved, meeting the high-precision adjustment requirements under different observation scenarios. Moreover, it can be quickly fixed after adjustment, making operation convenient.

[0011] 4. The surface stability and relative position stability of the primary and secondary mirrors effectively ensure the fixation of the telescope's focal plane position, avoiding problems such as image blurring and distortion caused by focal plane offset, and greatly improving the telescope's imaging quality and observation accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a Cassegrain telescope structure according to the present invention; Figure 2 This is an AA cross-sectional view of a Cassegrain telescope according to the present invention; Figure 3 This is a top view of a Cassegrain telescope according to the present invention; Figure 4 This is a bottom view of a Cassegrain telescope according to the present invention.

[0013] In the diagram: 1. Double-headed clamp; 2. Secondary mirror fixing plate; 3. Pin; 4. Telescope top plate; 5. Carbon fiber rod connector; 6. Secondary mirror; 7. Secondary mirror light shield; 8. Aperture; 9. Carbon fiber support rod; 10. Primary mirror light shield; 11. Primary mirror light tube; 12. Single-headed clamp; 13. Primary mirror; 14. Aperture and collimating lens mounting tube; 15. Telescope base plate; 16. Leveling triangle; 17. Collimating lens; 18. Secondary mirror adjusting screw; 19. Secondary mirror locking screw; 20. Primary mirror adjusting screw; 21. Primary mirror locking screw. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1-4 The present invention provides a new technical solution: a Cassegrain telescope, which is composed of a primary mirror assembly, a secondary mirror assembly, a carbon fiber rod assembly, a telescope top plate 4, a telescope base plate 15, and optical auxiliary components, including an aperture stop 8, a collimating lens 17, and an aperture stop and collimating lens mounting tube 14, etc.

[0016] The primary mirror 13 of the primary mirror assembly is made of microcrystalline glass and is mounted on the leveling triangle 16. The external thread at the lower end of the primary mirror optical tube 11 and the internal thread of the leveling triangle 16 form a threaded pair to clamp and fix the primary mirror 13. Three primary mirror locking screws 21 and three primary mirror adjusting screws 20 are provided between the leveling triangle 16 and the telescope base plate 15. Rotating the primary mirror adjusting screws 20 can adjust the relative distance and angle between the leveling triangle 16 and the telescope base plate 15 to achieve fine adjustment of the attitude of the primary mirror 13. After adjustment, tighten the primary mirror locking screws 21 to complete the fixation.

[0017] The secondary mirror 6 of the secondary mirror assembly is made of microcrystalline glass. The secondary mirror (6) is fixed to the secondary mirror fixing plate (2) by three secondary mirror support arms that are evenly distributed in the circumferential direction. Three secondary mirror locking screws 19 and three secondary mirror adjusting screws 18 are provided between the secondary mirror fixing plate 2 and the telescope top plate 4. Rotating the secondary mirror adjusting screws 18 can adjust the relative distance and angle between the secondary mirror fixing plate 2 and the telescope top plate 4, so as to achieve fine adjustment of the attitude of the secondary mirror 6. After adjustment, tighten the secondary mirror locking screws 19 to complete the fixation.

[0018] The top plate 4 and the bottom plate 15 of the telescope are connected by a carbon fiber rod assembly. The carbon fiber rod assembly includes a carbon fiber support rod 9, a carbon fiber rod connector 5, a single-head clamp 12, and a double-head clamp 1. The carbon fiber support rod 9 is made of carbon fiber, and its two ends are bonded with carbon fiber rod connectors 5. The carbon fiber rod connectors 5 are ball-head structures, which clamp and cooperate with the single-head clamp 12 and the double-head clamp 1 respectively. There are four groups of carbon fiber support rods 9, which are evenly distributed in the circumference. Each group has two carbon fiber support rods, and the two carbon fiber support rods 9 in the same group are arranged in a triangle. By loosening the single-head clamp 12 and the double-head clamp 1, the relative position and angle of the top plate 4 and the bottom plate 15 of the telescope can be adjusted over a wide range by utilizing the rotation characteristics of the ball head, thereby realizing a wide range of attitude adjustment of the primary mirror 13 and the secondary mirror 6. After adjusting to the target position, tighten the single-head clamp 12 and the double-head clamp 1 to fix the ball head structure. At this time, the relative distance between the primary mirror 13 and the secondary mirror 6 is limited by the length of the carbon fiber support rod 9. Relying on the length stability of the carbon fiber support rod 9, the relative distance between the primary and secondary mirrors remains basically unchanged.

[0019] The aperture 8 is positioned between the secondary mirror shading tube 7 and the primary mirror shading tube 10 to control the amount of light transmitted. The collimating lens 17 is fixed to the side of the telescope base plate 15 via the aperture and the collimating lens mounting tube 14 to collimate the incident light, optimize the optical transmission path, and improve the imaging quality.

[0020] Working principle: During assembly and use, the Cassegrain telescope can first achieve a wide range of coarse attitude adjustments to the primary and secondary mirrors through the carbon fiber rod assembly, and then achieve precise fine adjustments through the combination of adjusting the set screws and locking screws. After the adjustments are in place, all components are locked and fixed. During use, the microcrystalline glass primary and secondary mirrors and the carbon fiber support rods can effectively resist the influence of environmental changes, ensuring the stability of the primary and secondary mirror surfaces and their relative positions, thereby maintaining the stability of the telescope's imaging quality.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Cassegrain telescope, characterized in that It includes a primary mirror assembly, a secondary mirror assembly, a connecting assembly, a telescope top plate (4), and a telescope base plate (15); the primary mirror assembly is located on the side of the telescope base plate (15), the secondary mirror assembly is located on the side of the telescope top plate (4), and the connecting assembly is connected between the telescope top plate (4) and the telescope base plate (15); The main mirror assembly includes a main mirror (13), a leveling triangle (16), and a main mirror optical tube (11). The main mirror (13) is made of microcrystalline glass. The main mirror (13) is mounted on the leveling triangle (16). The lower end of the main mirror optical tube (11) is provided with an external thread. The main mirror optical tube (11) and the leveling triangle (16) are engaged by a threaded pair. The main mirror (13) is clamped between the main mirror optical tube (11) and the leveling triangle (16). The secondary mirror assembly includes a secondary mirror (6), a secondary mirror fixing plate (2), and a secondary mirror light shield (7). The secondary mirror (6) is made of microcrystalline glass. The secondary mirror (6) is fixed to the secondary mirror fixing plate (2) by three secondary mirror arms that are circumferentially and equally spaced. Three primary mirror locking screws (21) and three primary mirror adjusting screws (20) are provided between the leveling triangle plate (16) and the telescope base plate (15). Three secondary mirror locking screws (19) and three secondary mirror adjusting screws (18) are provided between the secondary mirror fixing plate (2) and the telescope top plate (4). The connecting component is a carbon fiber rod assembly, including a carbon fiber support rod (9), a carbon fiber rod connector (5), a single-head clamp (12), and a double-head clamp (1). The carbon fiber support rod (9) is made of carbon fiber. The carbon fiber rod connector (5) is bonded to both ends of the carbon fiber support rod (9). The carbon fiber rod connector (5) is a ball head structure. The ball head structure is clamped and engaged with the single-head clamp (12) and the double-head clamp (1) respectively. The single-head clamp (12) and the double-head clamp (1) are connected to the telescope base plate (15) and the telescope top plate (4) respectively.

2. A Cassegrain telescope according to claim 1, characterized in that: It also includes an aperture stop (8), a primary mirror shading tube (10), an aperture stop and collimating lens mounting tube (14), and a collimating lens (17). The aperture stop (8) is located between the secondary mirror shading tube (7) and the primary mirror shading tube (10). The collimating lens (17) is installed inside the aperture stop and collimating lens mounting tube (14). The aperture stop and collimating lens mounting tube (14) is located on the side of the telescope base plate (15).

3. A Cassegrain telescope according to claim 1, wherein: It also includes a pin (3), which is located between the top plate (4) of the telescope and the secondary mirror fixing plate (2).

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