An angle-improving fixture for an aspherical lens assembly

Abstract

This utility model discloses an angle-improving fixture for aspherical lens assemblies, belonging to the field of lens assembly. The fixture includes a support frame and a tubular housing for mounting the aspherical lens assembly. The support frame has a through hole in its center, and the tubular housing is inserted into the through hole. A pressure plate is detachably mounted on the top of the support frame and above the tubular housing, the pressure plate constraining the tubular housing within the through hole. A pressing component is provided on the top of the pressure plate, the pressing component including a pressing block that moves longitudinally above the inlet of the tubular housing. The pressing block can move downwards to act on the aspherical lens assembly and press the aspherical lens assembly into the tubular housing. This fixture effectively controls the tilt and eccentricity of the aspherical lens mounted in the tubular housing, is easy to operate, and is used to improve the mounting angle of the aspherical lens assembly in optical equipment, reducing angle defects and improving the product's optical performance.

Description

Technical Field

[0001] This utility model relates to the field of lens assembly, and in particular to an angle improvement fixture for aspherical lens assemblies. Background Technology

[0002] In the field of fiber optic communication, optical transceivers typically use optical elements such as spherical lenses and aspherical lenses as coupling elements for optical focusing. Simultaneously, the lenses must be mounted and fixed to supporting structures to achieve mechanical positioning and hermetic sealing. Optical window packaging technology plays a crucial role in the normal operation of optoelectronic devices, and the connection technology between the housing and the lens mainly affects the optical window sealing technology. As the requirements for the hermeticity and reliability of the sealing components in optoelectronic devices become increasingly stringent, hermetic packaging is often adopted to increase the long-term reliability of the devices.

[0003] As optoelectronic devices evolve towards higher transmission rates and greater integration, the impact of angular deviation on system performance becomes increasingly prominent. In actual packaging processes, lenses typically rely on passive assembly structures. Due to the lack of an optimization mechanism for the lens's installation angle within optical devices, alignment between the lens and the housing often depends on the experience of the assembly personnel or is achieved through rough mechanical adjustments. This traditional mounting method easily leads to angular deviations in the lens within the optical system. These deviations can cause astigmatism, decreased coupling efficiency, and spot distortion, thereby affecting image quality and performance stability. Utility Model Content

[0004] This invention provides an angle improvement fixture for aspherical lens assemblies, which can solve the problem that the traditional installation method of existing angle improvement fixtures for aspherical lens assemblies easily leads to angular deviation of the lens in the optical system, affecting imaging quality and performance stability.

[0005] An angle-improving fixture for an aspherical lens assembly includes a support frame and a housing for mounting the aspherical lens assembly. The support frame has a through hole in the middle, and the housing is inserted into the through hole. A pressure plate is detachably mounted on the top of the support frame and above the housing. The pressure plate is used to confine the housing inside the through hole.

[0006] The top of the pressure plate is provided with a pressing component, which includes a pressing block that moves longitudinally above the tube inlet. The pressing block can move downward to act on the aspherical lens assembly and press the aspherical lens assembly into the tube.

[0007] Preferably, the pressing assembly further includes a fixed frame fixed to the top of the pressure plate, a guide rod slidably connected to the fixed frame, and a pressing plate fixed to the top of the guide rod.

[0008] Preferably, the support frame has a base fixed at its bottom, and a telescopic support assembly concentrically arranged with the through hole is fixed at the top of the base. The telescopic support assembly is used to support the aspherical lens assembly at the inlet of the tube shell.

[0009] Preferably, the telescopic support assembly includes a fixed column fixed to the base, a movable column slidably connected to the fixed column, a bearing plate fixed to the top of the movable column, and a second spring sleeved on the movable column.

[0010] Preferably, a plurality of first positioning pins are evenly fixed on the top of the support frame, and a lower limiting plate is sleeved on the outer side of the tube shell, and a first positioning hole is opened on the lower limiting plate to cooperate with and connect with the first positioning pins.

[0011] Preferably, a plurality of second positioning pins are evenly fixed on the top of the support frame, and a second positioning hole is provided inside the pressure plate to cooperate with and connect with the second positioning pins.

[0012] Preferably, a plurality of third positioning pins are uniformly fixed at the bottom of the pressure plate, and an upper positioning plate is provided between the bottom of the pressure plate and the top of the tube shell. The upper positioning plate is provided with a third positioning hole that cooperates with the third positioning pins.

[0013] Preferably, the pressing assembly further includes a first spring sleeved on the guide rod and a positioning screw threaded to the pressing plate.

[0014] Preferably, the base is equipped with a level on top, and multiple adjusting screws are evenly threaded onto the base, with a support plate rotatably connected to the bottom of each adjusting screw.

[0015] Preferably, a soft pad is fixed to the top of the bearing plate and the bottom of the pressure block.

[0016] This utility model provides an angle-improving fixture for aspherical lens assemblies, which has the following beneficial effects:

[0017] 1. The tube housing is inserted into the through hole of the support frame for positioning and fixation. The support frame ensures the stability of the tube housing. The aspherical lens assembly is placed at the tube housing inlet. The pressing component is driven, causing the pressure block to move vertically downwards. Its bottom acts on the upper surface of the aspherical lens assembly, smoothly and vertically pressing the aspherical lens assembly into the designated position inside the tube housing. This fixture effectively controls the tilt and eccentricity of the aspherical lens during installation in the tube housing. It is easy to operate and is used to improve the installation angle of the aspherical lens assembly in optical equipment, reducing angular defects and improving the product's optical performance.

[0018] 2. Place the aspherical lens assembly to be installed above the support plate, concentrically with the inlet of the tube shell. When the pressure block acts downward on the aspherical lens assembly, it pushes the aspherical lens assembly into the tube shell. At the same time, under the support of the support plate, the aspherical lens assembly maintains stable longitudinal movement, which facilitates the vertical pressing of the aspherical lens assembly into the designated position inside the tube shell, ensuring the installation angle. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of an angle improvement fixture for an aspherical lens assembly provided by this utility model. Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of an angle improvement fixture for an aspherical lens assembly provided by this utility model. Figure 2 ;

[0021] Figure 3 An exploded view of an angle-improving fixture for an aspherical lens assembly provided by this utility model;

[0022] Figure 4 A schematic diagram of the pressure plate structure of an angle-improving fixture for an aspherical lens assembly provided by this utility model (view from below).

[0023] Figure 5 This is a cross-sectional structural schematic diagram of an angle improvement fixture for an aspherical lens assembly provided by this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Tube shell; 2. Support frame; 3. First positioning pin; 4. Lower limit plate; 5. Pressure plate; 6. Second positioning pin; 7. Third positioning pin; 8. Upper limit plate; 9. Pressure block; 10. Fixing frame; 11. Guide rod; 12. First spring; 13. Press plate; 14. Fixed column; 15. Movable column; 16. Second spring; 17. Base; 18. Positioning screw; 19. Adjusting screw; 20. Support plate; 21. Level; 22. Bearing plate; 23. Soft pad. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0027] like Figures 1 to 5As shown in the figure, the present invention provides an angle improvement fixture for an aspherical lens assembly, including a support frame 2 and a housing 1 for mounting the aspherical lens assembly. The support frame 2 has a through hole in the middle, and the housing 1 is inserted into the through hole. A pressure plate 5 is detachably installed on the top of the support frame 2 and above the housing 1. The pressure plate 5 is used to limit the housing 1 to be located inside the through hole. The pressure plate 5 has a pressing component on the top, which includes a pressing block 9 that moves longitudinally above the inlet of the housing 1. The pressing block 9 has a hollow structure inside and can move downward to act on the aspherical lens assembly and press the aspherical lens assembly into the housing 1.

[0028] The housing 1 (a ring structure with a flange and internal positioning protrusions) is inserted into the through hole of the support frame 2, achieving positioning and fixation on the support frame 2. The support frame 2 provides support and positioning, ensuring the stability of the housing 1. The aspherical lens assembly is placed at the inlet of the housing 1, and the pressing component is driven, causing the pressing block 9 to move vertically downwards. Its bottom acts on the upper surface of the aspherical lens assembly, smoothly and vertically pressing the aspherical lens assembly into the designated position inside the housing 1. This fixture effectively controls the tilt and eccentricity of the aspherical lens installed in the housing 1, improving the installation angle of the aspherical lens assembly in optical equipment, reducing angular defects, and thus improving the product's optical performance.

[0029] In some specific implementation plans, such as Figure 1 , Figure 2 and Figure 5 As shown, the pressing assembly also includes a fixed frame 10 fixed to the top of the pressure plate 5, a guide rod 11 slidably connected to the fixed frame 10, a pressing plate 13 fixed to the top of the guide rod 11, a first spring 12 sleeved on the guide rod 11, and a positioning screw 18 threadedly connected to the pressing plate 13. The first spring 12 is located between the fixed frame 10 and the pressing plate 13, and a knob is provided on the top of the positioning screw 18. A sliding groove is opened inside the fixed column 14 for the extension and retraction of the movable column 15, and a flange is provided at the bottom of the movable column 15 for limiting its position.

[0030] During press-fitting, the operator can fine-tune the initial distance between the lower end of the positioning screw 18 and the fixing frame 10 by rotating the knob, thereby achieving the preset pressing stroke and preventing excessive pressing from damaging the non-installed aspherical lens assembly. Subsequently, the pressing plate 13 is pressed down, simultaneously controlling the alignment of the aspherical lens assembly with the opening of the tube shell 1. The guide rod 11 slides smoothly down in the fixing frame 10, and the pressing block 9 moves down to transfer pressure to the aspherical lens assembly, completing the press-fitting. The first spring 12 is compressed. After press-fitting is completed, the pressing plate 13 is released, and the pressing plate 13 is reset under the action of the first spring 12.

[0031] In some specific implementation plans, such as Figure 1 , Figure 3 and Figure 5As shown, a plurality of second positioning pins 6 are evenly fixed on the top of the support frame 2, and a second positioning hole is opened inside the pressure plate 5 to cooperate with and connect with the second positioning pins 6.

[0032] When the pressure plate 5 is placed on top of the tube shell 1, it is positioned on the support frame 2 by the cooperation of the positioning hole and the second positioning pin 6, ensuring the pressing and positioning effect on the tube shell 1. When the pressing block 9 moves downward, the pressure plate 5 is pressed simultaneously to maintain a stable positioning state.

[0033] In some specific implementation plans, such as Figure 3 and Figure 5 As shown, a base 17 is fixedly mounted at the bottom of the support frame 2, and a telescopic support assembly concentrically arranged with the through hole is fixedly mounted on the top of the base 17. The telescopic support assembly is used to support the aspherical lens assembly at the inlet of the tube shell 1. The telescopic support assembly includes a fixed column 14 fixed on the base 17, a movable column 15 slidably connected to the fixed column 14, a support plate 22 fixed on the top of the movable column 15, and a second spring 16 sleeved on the movable column 15. Soft pads 23 are fixedly mounted on the top of the support plate 22 and the bottom of the pressure block 9 to protect the surface of the aspherical lens assembly and prevent indentations or scratches on the optical surface.

[0034] The aspherical lens assembly to be installed is placed above the support plate 22, concentrically with the inlet of the housing 1. When the pressure block 9 acts downward on the aspherical lens assembly, it pushes the aspherical lens assembly into the housing 1. Simultaneously, under the support of the support plate 22, the aspherical lens assembly maintains stable longitudinal movement and is vertically pressed into the designated position inside the housing 1. After assembly, the pressure applied to the pressure block 9 is removed, and the second spring 16 pushes the support plate 22 upward to reset it.

[0035] In some specific implementation plans, such as Figure 3 , Figure 4 and Figure 5 As shown, the top of the support frame 2 is also uniformly fixed with multiple first positioning pins 3, and the outer side of the tube shell 1 is fitted with a lower limiting plate 4, which has a first positioning hole that mates with the first positioning pins 3. The bottom of the pressure plate 5 is uniformly fixed with multiple third positioning pins 7, and an upper limiting plate 8 is provided between the bottom of the pressure plate 5 and the top of the tube shell 1, which has a third positioning hole that mates with the third positioning pins 7. The first positioning hole and the first positioning pin 3, as well as the third positioning hole and the third positioning pin 7, maintain an interference fit to ensure the stability of the connection. The ends of the first positioning pin 3, the second positioning pin 6, and the third positioning pin 7 are all hemispherical structures, which serve as guides and facilitate insertion into the positioning holes.

[0036] Both the lower limit plate 4 and the upper limit plate 8 are circular ring structures, used to support the tube shell 1. They also clamp the flange of the tube shell 1 to ensure its stability. Both the lower limit plate 4 and the upper limit plate 8 are installed using a movable connection between locating pins and locating holes, facilitating the disassembly and replacement of the lower limit plate 4 and upper limit plate 8 with different ring diameters. This allows for adjustments based on different inner diameters of the tube shell 1, ensuring its stability.

[0037] In some specific implementation plans, such as Figure 2 and Figure 3 As shown, in order to ensure the overall levelness of the fixture, a level 21 is provided on the top of the base 17. The level 21 is a bubble level. Multiple adjusting screws 19 are evenly threaded on the base 17, and a support plate 20 is rotatably connected to the bottom of each adjusting screw 19.

[0038] Place the fixture on the workbench and observe the position of the bubble in the level 21. If the bubble deviates from the center, it indicates that the base 17 is not level. The operator can adjust the support height at the corresponding angle by rotating each adjusting screw 19 to mechanically calibrate the entire base 17, which can effectively ensure the reference level for the subsequent installation of the aspherical lens assembly.

[0039] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:

[0040] The tube shell 1 is inserted into the lower limit plate 4, and the pressure plate 5 is placed on the top of the tube shell 1. It is positioned on the support frame 2 by the cooperation of the positioning hole and the second positioning pin 6 to ensure the pressing and positioning effect of the tube shell 1. When the pressing block 9 moves downward, the pressing plate 5 is pressed simultaneously to maintain a stable positioning state.

[0041] The aspherical lens assembly to be installed is placed above the support plate 22, concentrically with the inlet of the housing 1. During press-fitting, the operator can fine-tune the initial distance of its lower end relative to the fixing bracket 10 by rotating the positioning screw 18 with a knob, thereby achieving the preset pressing stroke and preventing excessive pressing from damaging the non-installed aspherical lens assembly.

[0042] Subsequently, pressing down on the pressing plate 13 simultaneously aligns the aspherical lens assembly with the opening of the tube shell 1. The guide rod 11 slides smoothly down in the fixing frame 10, and the pressure block 9 moves down to transmit pressure to the aspherical lens assembly, pushing the aspherical lens assembly into the tube shell 1. At the same time, under the support of the bearing plate 22, the aspherical lens assembly maintains stable longitudinal movement, vertically pressing into the designated position inside the tube shell 1, completing the press-fitting. The first spring 12 is compressed. After the press-fitting is completed, the pressing plate 13 is released, and the pressing plate 13 is reset under the action of the first spring 12. The second spring 16 is used to push the bearing plate 22 upward to reset.

[0043] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An angle improvement jig for aspherical lens assembly, comprising a support frame (2) and a tube housing (1) for mounting an aspherical lens assembly, characterized in that, The support frame (2) has a through hole in the middle, and the tube shell (1) is inserted into the through hole. A pressure plate (5) is detachably installed on the top of the support frame (2) and above the tube shell (1). The pressure plate (5) is used to limit the tube shell (1) to be located inside the through hole. The pressure plate (5) is provided with a pressing component at the top. The pressing component includes a pressing block (9) that moves longitudinally above the inlet of the tube shell (1). The pressing block (9) can move downward to act on the aspherical lens assembly and press the aspherical lens assembly into the tube shell (1).

2. The angle improvement jig for aspherical lens assembly according to claim 1, wherein The pressing assembly also includes a fixed frame (10) fixed to the top of the pressure plate (5), a guide rod (11) slidably connected to the fixed frame (10), and a pressing plate (13) fixed to the top of the guide rod (11).

3. The angle improvement jig for aspherical lens assembly according to claim 2, wherein The support frame (2) has a base (17) fixed at its bottom, and a telescopic support assembly is fixed at the top of the base (17) and is concentrically arranged with the through hole. The telescopic support assembly is used to support the aspherical lens assembly at the inlet of the tube shell (1).

4. The angle improvement jig for aspherical lens assembly according to claim 3, wherein The telescopic support assembly includes a fixed column (14) fixed on the base (17), a movable column (15) slidably connected to the fixed column (14), a bearing plate (22) fixed on the top of the movable column (15), and a second spring (16) sleeved on the movable column (15).

5. The angle-improving fixture for an aspherical lens assembly as described in claim 1, characterized in that, The top of the support frame (2) is also uniformly fixed with a plurality of first positioning pins (3), and the outer side of the tube shell (1) is fitted with a lower limiting plate (4), and the lower limiting plate (4) is provided with a first positioning hole that cooperates with the first positioning pins (3).

6. The angle improvement fixture for an aspherical lens assembly as described in claim 5, characterized in that, The support frame (2) is uniformly fixed with a plurality of second positioning pins (6) on its top, and the pressure plate (5) has a second positioning hole inside that cooperates with the second positioning pins (6).

7. The angle-improving fixture for an aspherical lens assembly as described in claim 6, characterized in that, The bottom of the pressure plate (5) is uniformly fixed with a plurality of third positioning pins (7), and an upper limit plate (8) is provided between the bottom of the pressure plate (5) and the top of the tube shell (1). The upper limit plate (8) is provided with a third positioning hole that cooperates with the third positioning pins (7).

8. The angle improvement fixture for an aspherical lens assembly as described in claim 2, characterized in that, The pressing assembly also includes a first spring (12) sleeved on the guide rod (11) and a positioning screw (18) threaded onto the pressing plate (13).

9. The angle-improving fixture for an aspherical lens assembly as described in claim 3, characterized in that, The base (17) is equipped with a level (21) on top, and multiple adjusting screws (19) are evenly threaded on the base (17). Each adjusting screw (19) is rotatably connected to a support plate (20) at its bottom.

10. The angle-improving fixture for an aspherical lens assembly as described in claim 4, characterized in that, The top of the bearing plate (22) and the bottom of the pressure block (9) are both fixed with soft pads (23).

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