Mounting structure for dynamic focusing dynamic lens

Abstract

The invention relates to the technical field of optical dynamic focusing, and particularly discloses a mounting structure for a dynamic focusing dynamic lens, which comprises a focusing element module, and the focusing element module comprises a mounting seat and a mounting ring; the mounting ring is connected to the top surface of the mounting seat, the inner wall of the mounting ring is connected with a baffle ring, the inner circumferential surface of the mounting ring is used for assembling a lens, the lens is attached to the side surface of the baffle ring, and the lens is tightly pressed to the side surface of the baffle ring through three pressure reeds which are uniformly distributed along the circumference of the mounting ring. The lens has the effect of solving the problem of distortion of the lens due to thermal expansion and cold contraction.

Description

Technical Field

[0001] This invention relates to the field of optical dynamic focusing technology, and in particular to a mounting structure for dynamic focusing lenses. Background Technology

[0002] The core function of an optical dynamic focusing system is to achieve rapid and precise movement of the beam focal point by adjusting the position or optical characteristics of focusing elements (such as lenses and mirrors) in real time. This system is widely used in various technical fields such as laser processing, 3D printing, microscopic imaging, and optical communication. In an optical dynamic focusing system, the effectiveness of the installation of focusing elements (such as lenses and mirrors) directly determines the optical accuracy and operational stability of the system, and is a key structural foundation for ensuring the system achieves its core functions.

[0003] Currently, the traditional methods for fixing lenses in optical dynamic focusing systems are mainly divided into two types: adhesive fixing and copper ring threaded clamping fixing. However, both of these fixing methods have insurmountable defects and cannot meet the requirements of high-precision and high-reliability optical dynamic focusing systems. First, when using adhesive fixing, the adhesive is prone to volatilization in high-temperature environments, which not only contaminates the lens and the internal system, affecting optical performance, but also has poor thermal conductivity, failing to dissipate the heat generated by the lens during operation in a timely manner. Long-term high-temperature accumulation will further accelerate the degradation of lens performance. Second, when using copper ring threaded clamping fixing, although copper has good thermal conductivity and can solve the heat dissipation problem to some extent, the copper ring forms a rigid connection structure with the lens after being rotated and clamped. This structure cannot adapt to the thermal expansion and contraction of the lens during operation, forcibly restricting the proportional micro-deformation requirements of the lens, which leads to lens distortion, destroys the stability and accuracy of the optical path, and ultimately affects the focusing accuracy of the optical dynamic focusing system.

[0004] In summary, existing traditional lens mounting methods suffer from technical defects such as contamination, poor heat dissipation, and lens distortion, which restrict the improvement of the accuracy and reliability of optical dynamic focusing systems and cannot meet the stringent requirements of high-end applications such as laser processing and 3D printing. Therefore, developing a novel lens mounting structure that can circumvent the aforementioned traditional defects while taking into account fixation reliability, heat dissipation, and adaptation to the thermal expansion and contraction of lenses has become an urgent technical problem to be solved in the field of optical dynamic focusing technology. Based on this, this invention has emerged. Summary of the Invention

[0005] To address the technical problems of traditional lens fixing methods, such as contamination, poor heat dissipation, and lens distortion, this application provides a mounting structure for dynamic focusing lenses.

[0006] The mounting structure for a dynamic focusing lens provided in this application adopts the following technical solution: A mounting structure for a dynamic focusing lens includes a focusing element module, the focusing element module including a mounting base and a mounting ring; the mounting ring is connected to the top surface of the mounting base, a retaining ring is connected to the inner wall of the mounting ring, the inner circumferential surface of the mounting ring is used to assemble the lens, the lens is attached to the side of the retaining ring, and the lens is pressed against the side of the retaining ring by three compression springs evenly distributed along the circumference of the mounting ring.

[0007] Optionally, the mounting ring has three mounting bosses on its side for mounting the compression spring. The three mounting bosses are evenly distributed around the circumference of the mounting ring. Anti-rotation bosses are connected to both sides of the mounting bosses away from the side of the mounting ring. Two of the anti-rotation bosses are used to prevent the compression spring from rotating. The mounting bosses have a threaded hole in the middle for mounting the compression spring and fastening it with screws.

[0008] Optionally, the compression spring includes a flat section and a curved section; the flat section fits against the side of the mounting boss and is located between two anti-rotation bosses, and the curved section is connected to the end of the flat section near the lens and bends downward to press the lens downward from a distance and maintain elasticity to accommodate the micro-deformation of the lens under thermal expansion and contraction.

[0009] Optionally, the end of the curved segment away from the planar segment curls upward, and the position in contact with the lens is a smooth curved surface.

[0010] Optionally, the compression spring is made of high-strength stainless steel with a thickness of 0.5mm, a width of 4.5mm, and a height of 2.3mm. The flat section has a through hole with a diameter of 2.1mm for screw fixing. The curved section bends downward at 110° relative to the flat section. The end of the curved section away from the flat section curls upward in a circle with a radius of 0.8mm.

[0011] Optionally, the lens is circumferentially fitted with a metal annular flat tube, which is disposed inside the mounting ring and its outer circumferential surface is tightly attached to the inner wall of the mounting ring.

[0012] Optionally, the annular flat tube is formed by winding a flat tube into an annular shape and injecting coolant inside; both ends of the annular flat tube are located at the bottom and are connected to vertically downward connecting pipes, and the bottom ends of the two connecting pipes are connected to one end of a liquid storage pipe, and the other ends of the two liquid storage pipes face opposite directions and are located on both sides of the annular flat tube; the mounting ring and mounting base are provided with mounting grooves on the side away from the retaining ring for the connecting pipes and liquid storage pipes to enter.

[0013] Optionally, a sliding block is slidably connected inside the liquid storage tube. The circumferential surface of the sliding block is in contact with the inner wall of the liquid storage tube. The sliding block is located at the end of the liquid storage tube away from the connecting tube. A spring is provided inside the liquid storage tube. One end of the spring is pressed against the inner wall of the liquid storage tube away from the connecting tube, and the other end is pressed against the end face of the sliding block.

[0014] Optionally, the end of the liquid storage tube furthest from the sliding block is threaded with a sealing plug.

[0015] Optionally, the ends of the two liquid storage tubes are attached to the side wall of the mounting groove. A limiting block is provided at the opening of the mounting groove. The limiting block is attached to the end face of the liquid storage tube near the opening of the mounting groove. A mounting plate is connected to the side of the limiting block away from the liquid storage tube. The mounting plate is detachably connected to the top surface of the mounting base.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The compression spring is made of high-strength stainless steel and has a special structural design. While ensuring the installation strength of the lens, its contact end can be slightly deformed in sync with the thermal expansion and contraction of the lens. It is a flexible connection, which can reduce lens distortion and improve optical path accuracy. 2. When the lens expands, it also expands radially. At this time, the lens applies radial pressure to the annular flat tube, and the annular flat tube will contract under pressure to resolve the effects of the lens's radial expansion. 3. By setting up an annular flat tube, on the one hand, the pressure caused by the expansion of the lens is released, and on the other hand, coolant is injected into the annular flat tube to dissipate the heat of the lens in time, and heat exchange continues through the coolant stored in the reservoir tube. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of Embodiment 1 of this application; Figure 2 This is a partial exploded view of the installation structure of Embodiment 1 of this application; Figure 3 This is a schematic diagram of the compression spring sheet in Embodiment 1 of this application; Figure 4 This is a side view of the compression spring sheet of Embodiment 1 of this application; Figure 5 This is a top view of the compression spring sheet of Embodiment 1 of this application; Figure 6 This is a schematic diagram of the installation structure of Embodiment 2 of this application; Figure 7 This is a partial exploded view of the installation structure of Embodiment 2 of this application; Figure 8 This is a cross-sectional view of the liquid storage tube in Embodiment 2 of this application.

[0018] Explanation of reference numerals in the attached figures: 01. Base; 1. Lens; 2. Detector module; 3. Focusing element module; 31. Mounting base; 32. Mounting ring; 321. Retaining ring; 322. Mounting boss; 3221. Threaded hole; 323. Anti-rotation boss; 324. Screw; 33. Mounting groove; 4. Drive module; 5. Guide rail assembly; 6. Compression spring; 61. Flat section; 62. Bending section; 7. Annular flat tube; 71. Connecting tube; 8. Liquid storage tube; 81. Sliding block; 82. Spring; 83. Sealing plug; 9. Limiting block; 91. Mounting plate. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example

[0020] This application discloses a mounting structure for a dynamic focusing lens. (Refer to...) Figure 1-5 The installation structure includes a detector module 2 for monitoring the real-time position of lens 1, a focusing element module 3 capable of linear movement, and a drive module 4. The drive module 4 adopts a structure design with two symmetrically linked components, which can provide double the driving force and drive the light shield in the detector module 2 and the focusing element module 3 to move synchronously. Both the detector module 2 and the drive module 4 are fixedly installed on the base, and the focusing element module 3 is slidably connected to the base through the guide rail assembly 5.

[0021] The focusing element module 3 includes a mounting base 31 and a mounting ring 32. The mounting base 31 is slidably connected to the guide rail assembly 5. The drive module 4 is used to drive the mounting base 31. The mounting ring 32 is integrally formed on the top surface of the mounting base 31. A retaining ring 321 is integrally formed on the inner wall of the mounting ring 32. One side of the retaining ring 321 is flush with the side of the mounting ring 32. The inner circumferential surface of the mounting ring 32 is used to assemble the lens 1. The lens 1 is attached to the side of the retaining ring 321. The lens 1 is fixed to the mounting ring 32 by three compression springs 6 evenly distributed along the circumference of the mounting ring 32.

[0022] The mounting ring 32 has three mounting bosses 322 integrally formed on its side for mounting the spring 6. The three mounting bosses 322 are evenly distributed around the circumference of the mounting ring 32. The two sides of the mounting bosses 322 away from the side of the mounting ring 32 have anti-rotation bosses 323 integrally formed. The two anti-rotation bosses 323 are used to prevent the spring 6 from rotating. The mounting bosses 322 have a mounting threaded hole 3221 in the middle for mounting the spring 6 and fastening it with screws 324.

[0023] In this embodiment, the installation method of fixing the lens 1 with a spring 6 has significant advantages compared with the traditional lens 1 fixing method: the traditional adhesive method is prone to pollution due to the high temperature volatilization of the adhesive, and the heat conduction effect is generally poor; although the copper ring pressing method has a good heat conduction effect, it cannot deform synchronously with the thermal expansion and contraction of the lens 1 after the copper ring is rotated and pressed, which is a rigid connection. Its pressing method will limit the proportional micro-deformation requirement of the lens 1, thereby causing the lens 1 to be distorted and affecting the optical path.

[0024] In this embodiment, the compression spring 6 is made of high-strength stainless steel and has a special structural design. While ensuring the installation strength of the lens 1, its contact end can undergo slight deformation in sync with the thermal expansion and contraction of the lens 1. This is a flexible connection, which can reduce the distortion of the lens 1 and improve the optical path accuracy.

[0025] Specifically, the spring clip 6 has a thickness of 0.5mm, a width of 4.5mm, and a height of 2.3mm. It adopts a front-flat and rear-curved structure design. The spring clip 6 includes a flat section 61 and a curved section 62. The flat section 61 fits against the side of the mounting boss 322 and is located between the two anti-rotation bosses 323. The flat section 61 has a through hole with a diameter of 2.1mm for fixing with screws 324. The curved section 62 is integrally formed at the end of the flat section 61 near the lens 1. The curved section 62 is bent downward at 110° relative to the flat section 61, which is used to press the lens 1 downward from a distance and maintain a certain degree of elasticity to adapt to the micro-deformation requirements of the lens 1 under thermal expansion and contraction. The curved section 62 is curled upward away from the flat section 61 in a circle with a radius of 0.8mm, so that the contact position with the lens 1 is a smooth curved surface, which can effectively prevent scratching the lens 1. In addition, the spring clip 6, in conjunction with the mounting structure of the lens 1 with different design thicknesses, can realize the effective installation of dynamic lenses 1 with different thicknesses and curvatures, and has high versatility. Example

[0026] This application discloses a mounting structure for a dynamic focusing lens. The difference from Embodiment 1 is that, referring to... Figure 6-8 The lens 1 is circumferentially fitted with a metal annular flat tube 7, which is located inside the mounting ring 32, with the outer circumferential surface of the annular flat tube 7 tightly attached to the inner wall of the mounting ring 32.

[0027] When lens 1 expands, lens 1 will also expand in the radial direction. At this time, the radial pressure of lens 1 is applied to the annular flat tube 7. The annular flat tube 7 will contract under pressure to resolve the impact of the radial expansion of lens 1.

[0028] The annular flat tube 7 is formed by winding a flat tube into an annular shape, and coolant is injected into the annular flat tube 7. Both ends of the annular flat tube 7 are located at the bottom and are connected to connecting pipes 71, with the connecting pipes 71 facing vertically downwards. The bottom ends of the two connecting pipes 71 are connected to one end of a liquid storage pipe 8, and the other ends of the two liquid storage pipes 8 face opposite directions and are located on both sides of the annular flat tube 7. The mounting ring 32 and the mounting base 31 are provided with mounting grooves 33 on the side away from the retaining ring 321 for the connecting pipes 71 and the liquid storage pipes 8 to enter.

[0029] By setting up the annular flat tube 7, on the one hand, the pressure caused by the expansion of the lens 1 is released, and on the other hand, coolant is injected into the annular flat tube 7 so that the heat generated by the lens 1 can be dissipated in time, and heat exchange can continue through the coolant stored in the liquid storage tube 8.

[0030] A sliding block 81 is installed inside the liquid storage tube 8. The circumferential surface of the sliding block 81 is in contact with the inner wall of the liquid storage tube 8. The sliding block 81 is located at the end of the liquid storage tube 8 away from the connecting tube 71. A spring 82 is installed inside the liquid storage tube 8. One end of the spring 82 is pressed against the inner wall of the liquid storage tube 8 away from the connecting tube 71, and the other end of the spring 82 is pressed against the end face of the sliding block 81.

[0031] A sliding block 81 and a spring 82 are provided. The spring 82 pushes the sliding block 81, and the two sliding blocks 81 push the coolant into the annular flat tube 7, so that the annular flat tube 7 is filled with coolant. When the mounting base 31 moves back and forth quickly on the guide rail assembly 5, due to the sliding of the sliding block 81 in the liquid storage tube 8, the sliding block 81 will push the coolant in one of the liquid storage tubes 8 into the annular flat tube 7 during the rapid movement. The coolant in the annular flat tube 7 is pushed into the other liquid storage tube 8, and then the process is repeated in the opposite way, so that the coolant in the annular flat tube 7 is circulated and heat dissipation is accelerated.

[0032] The end of the reservoir tube 8 away from the sliding block 81 is threadedly sealed with a sealing plug 83; by unscrewing the sealing plug 83, the sliding block 81 and the spring 82 can be disassembled and the coolant replaced.

[0033] The ends of the two liquid storage tubes 8 are attached to the end side wall of the mounting groove 33. A limiting block 9 is provided at the opening of the mounting groove 33. The limiting block 9 is attached to the end face of the liquid storage tube 8 near the opening of the mounting groove 33. A mounting plate 91 is connected to the side of the limiting block 9 away from the liquid storage tube 8. The mounting plate 91 is detachably connected to the top surface of the mounting base 31.

[0034] The liquid storage tube 8 is confined within the mounting groove 33 by the limiting block 9, thus fixing the liquid storage tube 8 and preventing it from shaking when the mounting base 31 moves rapidly.

[0035] The two liquid storage tubes 8 are connected on the side walls, so that the annular flat tube 7 is in the shape of a ring, which can better clamp the lens 1.

[0036] The implementation principle of the mounting structure for a dynamic focusing lens in this application embodiment is as follows: the pressure spring 6 is made of high-strength stainless steel and has a special structural design. While ensuring the mounting strength of the lens 1, its contact end can be slightly deformed in sync with the thermal expansion and contraction of the lens 1. It is a flexible connection, which can reduce the distortion of the lens 1 and improve the optical path accuracy.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mounting structure for a dynamic focusing lens, characterized in that, The system includes a focusing element module (3), which includes a mounting base (31) and a mounting ring (32). The mounting ring (32) is connected to the top surface of the mounting base (31), and a retaining ring (321) is connected to the inner wall of the mounting ring (32). The inner circumferential surface of the mounting ring (32) is used to assemble a lens (1). The lens (1) is attached to the side of the retaining ring (321). The lens (1) is pressed to the side of the retaining ring (321) by three compression springs (6) evenly distributed along the circumference of the mounting ring (32).

2. The mounting structure for a dynamic focusing lens according to claim 1, characterized in that, The mounting ring (32) has three mounting bosses (322) connected to its side for mounting the spring sheet (6). The three mounting bosses (322) are evenly distributed around the circumference of the mounting ring (32). The mounting bosses (322) are connected to anti-rotation bosses (323) on both sides away from the mounting ring (32). The two anti-rotation bosses (323) are used to prevent the spring sheet (6) from rotating. The mounting bosses (322) have a mounting threaded hole (3221) in the middle for mounting the spring sheet (6) and fastening it with screws (324).

3. The mounting structure for a dynamic focusing lens according to claim 1, characterized in that, The compression spring (6) includes a flat section (61) and a curved section (62); the flat section (61) fits against the side of the mounting boss (322) and is located between two anti-rotation bosses (323); the curved section (62) is connected to the end of the flat section (61) near the lens (1) and bends downward to press the lens (1) downward from a distance and maintain elasticity to adapt to the micro-deformation of the lens (1) under thermal expansion and contraction.

4. The mounting structure for a dynamic focusing lens according to claim 3, characterized in that, The end of the curved section (62) away from the planar section (61) curls upwards, and the position in contact with the lens (1) is a smooth curved surface.

5. The mounting structure for a dynamic focusing lens according to claim 4, characterized in that, The compression spring (6) is made of high-strength stainless steel with a thickness of 0.5 mm, a width of 4.5 mm, and a height of 2.3 mm. The flat section (61) has a through hole with a diameter of 2.1 mm for screw (324) fixing. The curved section (62) is bent downward at 110° relative to the flat section (61). The end of the curved section (62) away from the flat section (61) is curled upward in a circle with a radius of 0.8 mm.

6. The mounting structure for a dynamic focusing lens according to claim 1, characterized in that, The lens (1) is circumferentially fitted with a metal annular flat tube (7), which is located inside the mounting ring (32) and its outer circumferential surface is tightly attached to the inner wall of the mounting ring (32).

7. The mounting structure for a dynamic focusing lens according to claim 6, characterized in that, The annular flat tube (7) is formed by winding a flat tube into an annular shape and injecting coolant inside; both ends of the annular flat tube (7) are located at the bottom and are connected to vertically downward connecting pipes (71), and the bottom ends of the two connecting pipes (71) are connected to one end of a liquid storage pipe (8), and the other ends of the two liquid storage pipes (8) face opposite directions and are located on both sides of the annular flat tube (7); the mounting ring (32) and the mounting base (31) are provided with mounting grooves (33) on the side away from the retaining ring (321) for the connecting pipes (71) and the liquid storage pipes (8) to enter.

8. The mounting structure for a dynamic focusing lens according to claim 7, characterized in that, A sliding block (81) is slidably connected inside the liquid storage tube (8). The circumferential surface of the sliding block (81) is in contact with the inner wall of the liquid storage tube (8). The sliding block (81) is located at the end of the liquid storage tube (8) away from the connecting tube (71). A spring (82) is provided inside the liquid storage tube (8). One end of the spring (82) is pressed against the inner wall of the liquid storage tube (8) away from the connecting tube (71), and the other end is pressed against the end face of the sliding block (81).

9. The mounting structure for a dynamic focusing lens according to claim 8, characterized in that, The end of the liquid storage tube (8) away from the sliding block (81) is threadedly sealed with a sealing plug (83).

10. The mounting structure for a dynamic focusing lens according to claim 7, characterized in that, The ends of the two liquid storage tubes (8) are attached to the end sidewall of the mounting groove (33). A limiting block (9) is provided at the opening of the mounting groove (33). The limiting block (9) is attached to the end face of the liquid storage tube (8) near the opening of the mounting groove (33). A mounting plate (91) is connected to the side of the limiting block (9) away from the liquid storage tube (8). The mounting plate (91) is detachably connected to the top surface of the mounting base (31).

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