Adjustable light shield device of Grignard optical system

Abstract

The utility model discloses an adjustable light shield device of a Gridger type optical system, which comprises a force bearing cylinder, an inner light shield is assembled in the force bearing cylinder, and a secondary mirror flexible joint is assembled in the inner light shield; a secondary mirror is assembled on the secondary mirror flexible joint, and a force bearing ring is assembled at the top end of the force bearing cylinder and located outside the inner light shield; the inner light shield comprises a central carrying rod, a light shield plate a, a light shield plate b and a light shield plate c; the light shield plate a, the light shield plate b and the light shield plate c are combined and sleeved outside the central carrying rod; a connecting column is installed at the end of the center carrying rod, a connector is installed at the end of the connecting column, the connector is installed in the bearing cylinder, and a bearing hoop is connected between the center carrying rod and the connecting column in a clamped mode; the structure is simple, so that the performance of the optical system is optimized. And the whole body is cylindrical, so that the stability and the reliability of the system are improved. Further innovation and development of an optical system technology are promoted, and a high-performance and high-stability optical solution is provided for application in more fields.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape and paper tube technology, specifically to an adjustable light shield device for a Gregorian optical system. Background Technology

[0002] In space camera optical systems, lens hoods are common optical accessories used to reduce or eliminate stray light interference, prevent glare, and improve image quality. Traditional lens hoods typically have a fixed structure, making it difficult to adapt to different lighting conditions or field-of-view requirements. Especially in Gregorian optical systems, the complex optical paths and variable application environments place higher demands on the adjustability and adaptability of lens hoods.

[0003] Gregorian optical systems are specially designed optical systems widely used in astronomical observation, microscopy, and precision measurement. Due to their complex optical paths and the high image quality requirements, traditional lens hoods often cannot meet the needs of dynamic adjustment. In such cases, the adjustability of the lens hood becomes particularly important to adapt to different observation environments, avoid light interference, and optimize imaging results.

[0004] While some existing light shields offer some adjustment capabilities, they typically employ complex mechanical structures, insufficient adjustment precision, or inconvenient operation, making precise adjustment of the optical system impossible. Therefore, developing an adjustable light shield device suitable for Gregorian optical systems is a crucial technical challenge in the field of optics. It would not only improve the system's flexibility and adaptability but also enhance image quality and ease of operation.

[0005] Traditional Gregorian optical systems typically use fixed lens hoods, making dynamic adjustment difficult. This limits their adaptability to different lighting conditions and application requirements. While some high-end lens hoods offer adjustment capabilities, their complex mechanical structures and inconvenient operation can lead to difficulties in maintenance and adjustment. Furthermore, some lens hoods on the market may not be fully compatible with specific Gregorian optical system models, resulting in inconvenient installation or poor performance. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable light shield device for a Gregorian optical system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an adjustable light shield device for a Gregorian optical system, comprising a support cylinder, wherein an inner light shield is assembled inside the support cylinder, and a secondary lens flexible joint is assembled inside the inner light shield.

[0008] The secondary mirror is mounted on the flexible joint, and a load-bearing ring is mounted on the top of the load-bearing cylinder outside the inner light shield.

[0009] The inner light shield includes a central support rod, light shield plate a, light shield plate b, and light shield plate c, which are combined and sleeved on the outside of the central support rod.

[0010] A connecting column is installed at the end of the central support rod, and a connector is installed at the end of the connecting column. The connector is installed inside the load-bearing cylinder, and a load-bearing clamp is engaged between the central support rod and the connecting column.

[0011] Both ends of the opening of the bearing clamp are equipped with fastening plates, and the side walls of the two fastening plates are provided with U-shaped grooves. Bolts are installed inside the U-shaped grooves, and a snap-fit ​​structure is assembled between the bearing clamp and the central support rod.

[0012] Preferably, a gasket a is installed between the load-bearing cylinder and the load-bearing ring, and a gasket b is installed between the secondary mirror flexible joint and the load-bearing ring.

[0013] Preferably, a nut is screwed onto the outer wall of the fastening plate on the outside of the bolt. A circular groove is formed on the internal thread of the nut. A circular part is placed in the circular groove. A threaded hole is formed on the circular part. The bolt is sleeved in the threaded hole.

[0014] Preferably, the circular groove has a slot, and the circular part has a locking block installed on it, the locking block being engaged in the slot.

[0015] Preferably, the snap-fit ​​structure includes a limiting block and a limiting groove. The inner wall of the bearing clamp is provided with four limiting grooves, and the outer wall of the central support rod is provided with four limiting blocks. The positions of each limiting block and each limiting groove correspond one-to-one, and the limiting block is installed in the limiting groove.

[0016] Preferably, the inner walls of the light-shielding cover a, light-shielding cover b and light-shielding cover c are all equipped with a first support plate, and the ends of the first support plate are all connected to a central support rod.

[0017] Preferably, a second support plate is installed at the end edge of the first support plate, and the second support plate has a raised shape from one end to the other end, with one end of the second support plate extending beyond the end edge of the first support plate.

[0018] Preferably, the first support plate has a chamfer at its starting end and is inclined. The sidewall of the first support plate has heat dissipation holes.

[0019] Compared with existing technologies, this solution designs an adjustable light shield device for a Gregorian optical system, which has the following advantages: Its simple structure allows users to adjust the position of the light shield according to actual needs and environmental conditions, thereby optimizing the performance of the optical system. Its modular, cylindrical shape improves the stability and reliability of the system. This promotes further innovation and development in optical system technology, providing high-performance, high-stability optical solutions for applications in more fields. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the inner light shield of this utility model;

[0023] Figure 4 This is a schematic diagram of the central support rod, load-bearing clamp, and connecting column of this utility model.

[0024] Figure 5 This is a schematic diagram of the bolt of this utility model;

[0025] Figure 6 This is a schematic diagram of the first support plate of this utility model.

[0026] In the diagram: 1 Inner light shield, 2 Load-bearing ring, 3 Gasket a, 4 Load-bearing cylinder, 5 Gasket b, 6 Secondary mirror flexible joint, 7 Secondary mirror, 8 Light shield plate a, 9 Light shield plate b, 10 Light shield plate c, 11 First support plate, 12 Central support rod, 13 Load-bearing clamp, 14 Connecting column, 15 Connecting head, 16 Limiting block, 17 Limiting groove, 18 Fastening plate, 19 U-shaped groove, 20 Bolt, 21 Nut, 22 Circular groove, 23 Circular part, 24 Threaded hole, 25 Slot, 26 Locking block, 27 Heat dissipation hole, 28 One end of the second support plate, 29 Second support plate, 30 The other end of the second support plate, 31 Chamfer. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 6The present invention provides a technical solution: an adjustable light shield device for a Gregorian optical system, comprising a support cylinder 4, an inner light shield 1 assembled inside the support cylinder 4, a secondary mirror flexible joint 6 assembled inside the inner light shield 1; a secondary mirror 7 assembled on the secondary mirror flexible joint 6; a support ring 2 assembled at the top of the support cylinder 4 outside the inner light shield 1; the inner light shield 1 includes a central support rod 12, a light shield plate a8, a light shield plate b9, and a light shield plate c10, the light shield plate a8, the light shield plate b9, and the light shield plate c10, the light shield plate b9 ... Plate b9 and light shield plate c10 are combined and fitted around the outside of the central support rod 12. Based on the coaxial RC+ compensating mirror structure used in the Gregorian optical system, the connection relationship between the secondary mirror light shield and the main supporting thin-walled cylinder connector is given here. The secondary mirror 7 is mounted on the secondary mirror flexible joint 6, which is mounted on the load-bearing ring 2 with a gasket 5 in between. The inner light shield 1 is also mounted on the load-bearing ring 2, located outside the secondary mirror 7 and wrapping it around it. The load-bearing ring 2 is mounted on the load-bearing cylinder 4 with a gasket 3 in between. The inner light shield 1 is divided into three parts: 8, 9, and 10. Each part has two mounting holes that are fixed to the upper waist holes of the load-bearing ring with screws. A connecting post 14 is installed at the end of the central support rod 12, and a connector 15 is installed at the end of the connecting post 14. The connector 15 is installed inside the load-bearing cylinder 4, and a load-bearing clamp 13 is snapped between the central support rod 12 and the connecting post 14.

[0029] Both ends of the opening of the bearing clamp 13 are equipped with fastening plates 18. The side walls of the two fastening plates 18 are provided with U-shaped grooves 19. Bolts 20 are installed inside the U-shaped grooves 19. A snap-fit ​​structure is assembled between the bearing clamp 13 and the central support rod 12. The bearing clamp 13 is fastened by the two fastening plates 18, and the two fastening plates 18 are fastened by the bolts 20.

[0030] A gasket a3 is installed between the load-bearing cylinder 4 and the load-bearing ring 2, and a gasket b5 is installed between the secondary mirror flexible joint 6 and the load-bearing ring 2.

[0031] A nut 21 is screwed onto the outer wall of the fastening plate 18 of the bolt 20. A circular groove 22 is formed on the internal thread of the nut 21. A circular part 23 is placed in the circular groove 22. A threaded hole 24 is formed on the circular part 23. The bolt 20 is fitted into the threaded hole 24. A retaining groove 25 is formed on the circular groove 22. A retaining block 26 is installed on the circular part 23. The retaining block 26 is engaged in the retaining groove 25. After the bolt 20 is installed into the U-shaped groove 19, the nut 21 is screwed onto the bolt 20. The circular part 23 is placed into the circular groove 22. At the same time, the retaining block 26 is engaged in the retaining groove 25, so that the bolt 20 passes through the U-shaped groove 10 on the bearing clamp 13. The nut 21 is screwed onto the bolt 20, so that the bolt 20 is screwed into the threaded hole 24 on the circular part 23, so that the nut 21 and the bolt 20 are doubly secured.

[0032] The snap-fit ​​structure includes a limiting block 16 and a limiting groove 17. The inner wall of the bearing clamp 13 is provided with four limiting grooves 17, and the outer wall of the central support rod 12 is provided with four limiting blocks 16. The positions of each limiting block 16 and each limiting groove 17 correspond one-to-one, and the limiting block 16 is installed in the limiting groove 17. When the bearing clamp 13 and the central support rod 12 are installed, the limiting block 16 can be installed in the limiting groove 17 for limiting.

[0033] The inner walls of the light-shielding covers a8, b9 and c10 are all equipped with first support plates 11, and the ends of the first support plates 11 are all connected to the central support rod 12.

[0034] A second support plate 29 is installed at the end edge of the first support plate 11. One end 28 of the second support plate and the other end 30 of the second support plate form a raised shape from low to high. One end 28 of the second support plate extends beyond one end of the end edge of the first support plate 11.

[0035] The first support plate 11 has a chamfer 31 at its starting end and is inclined. The side wall of the first support plate 11 has heat dissipation holes 27.

[0036] Working principle: 1. It adopts a segmented installation on the connecting frame between the load-bearing ring and the internal secondary mirror, which is easy to install and highly versatile. The number of segments can be adjusted according to the number of connecting frames. 2. The light shield is made of carbon fiber, which is lightweight and the fundamental frequency of the overall modal simulation results is above 100Hz, ensuring that the overall stiffness meets the vibration requirements and is not easily damaged. The segmented light shield can be adjusted to a non-circular distribution. When there is a difference between the theoretical result and the actual result, it can be adjusted according to the angle of the actual light to better suppress stray light and provide flexibility.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] 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. Gregorian optical system adjustable baffle device, comprising a force bearing cylinder (4), characterized in that: The inner force cylinder (4) is internally provided with an inner light shield (1), and the inner light shield (1) is internally provided with a secondary mirror flexible joint (6); The secondary mirror flexible joint (6) is provided with a secondary mirror (7), and the top end of the force cylinder (4) is externally provided with a force ring (2) outside the inner light shield (1); The inner light shield (1) comprises a center carrier (12), a light shield plate a (8), a light shield plate b (9) and a light shield plate c (10), and the light shield plate a (8), the light shield plate b (9) and the light shield plate c (10) are combined and knotted outside the center carrier (12); The end of the center carrier (12) is provided with a connecting column (14), the end of the connecting column (14) is provided with a connecting head (15), the connecting head (15) is installed inside the force cylinder (4), and the center carrier (12) and the connecting column (14) are clamped with a bearing clamp (13); The opening of the bearing clamp (13) is provided with a fastening plate (18) at both ends, the sidewall of the two fastening plates (18) is provided with a U-shaped groove (19), the inside of the U-shaped groove (19) is provided with a bolt (20), and the bearing clamp (13) and the center carrier (12) are provided with a clamping structure.

2. A Gregorian optical system adjustable baffle device according to claim 1, characterized in that: The force cylinder (4) and the force ring (2) are provided with a gasket a (3), and the secondary mirror flexible joint (6) and the force ring (2) are provided with a gasket b (5).

3. A Gregorian optical system adjustable baffle device according to claim 1, characterized in that: The outside of the bolt (20) is externally threaded with a nut (21) on the outer wall of the fastening plate (18), the inner thread on the nut (21) is provided with a circular groove (22), the circular groove (22) is placed with a circular part (23), the circular part (23) is provided with a threaded hole (24), and the bolt (20) is sleeved in the threaded hole (24).

4. A Gregorian optical system adjustable baffle device according to claim 3, characterized in that: The circular groove (22) is provided with a clamping groove (25), the circular part (23) is provided with a clamping block (26), and the clamping block (26) is clamped in the clamping groove (25).

5. The Gregorian optical system adjustable baffle device according to claim 1, characterized in that: The clamping structure comprises a limiting block (16) and a limiting groove (17), the inner wall of the bearing clamp (13) is provided with four limiting grooves (17), the outer wall of the center carrier (12) is provided with four limiting blocks (16), the position of each limiting block (16) and each limiting groove (17) corresponds one by one, and the limiting block (16) is installed in the limiting groove (17).

6. A Gregorian optical system adjustable baffle device according to claim 1, characterized in that: The inner wall of the light shield plate a (8), the light shield plate b (9) and the light shield plate c (10) is provided with a first support plate (11), and the end of the first support plate (11) is connected with the center carrier (12).

7. A Gregorian optical system adjustable baffle device according to claim 6, characterized in that: The end edge of the first support plate (11) is provided with a second support plate (29), one end (28) of the second support plate to the other end (30) of the second support plate is formed in a convex shape from low to high, and one end (28) of the second support plate exceeds one end of the end edge of the first support plate (11).

8. A Gregorian optical system adjustable baffle device according to claim 7, characterized in that: The beginning of the first support plate (11) is provided with a chamfer (31), the first support plate (11) is inclined, and the sidewall of the first support plate (11) is provided with a heat dissipation hole (27).

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