Active heat dissipation type laser beam expander mirror integrated structure

Abstract

This application discloses an integrated structure for an actively cooled laser beam expander, comprising: an integrated cylinder and two adjusting cylinders. A beam expander is positioned at the center of the inner cavity of the integrated cylinder. An input lens and an output lens are respectively positioned within the inner cavities of the two adjusting cylinders. Adjusting rings are rotatably mounted at both ends of the integrated cylinder. The two adjusting cylinders are positioned outside the two adjusting rings. An extension cylinder is located at the end of each adjusting cylinder closest to the integrated cylinder. The extension cylinder passes through the adjusting rings and extends into and communicates with the inner cavity of the integrated cylinder. The extension cylinder can move within the inner cavity of the integrated cylinder by rotating the adjusting rings. A limit ring is provided on the outer wall of the extension cylinder. The actively cooled laser beam expander integrated structure proposed in this application uses a limit ring to tighten the adjusting rings, thereby limiting the position of the adjusting cylinder after adjustment. This prevents changes in the distance between the input and output lenses due to deflection of the adjusting cylinder within the integrated cylinder, improving the stability of the beam expander's magnification and ensuring the beam expander effect.

Description

Technical Field

[0001] This utility model relates to the field of laser beam expander technology, specifically to an integrated structure of an active heat dissipation laser beam expander. Background Technology

[0002] A laser beam expander is an optical lens assembly used to change the diameter and divergence angle of a laser beam. Its core functions include expanding the beam diameter and compressing the divergence angle, thereby improving the collimation of the laser. However, with the continuous development of laser technology and the continuous improvement of laser output power, the application scenarios of beam expanders have gradually expanded. In addition to increasing power density, beam expanders can also be used to adjust the shape and direction of the laser beam to better adapt to different application needs. Furthermore, beam expanders can be combined with other optical components, such as focusing lenses and collimating lenses, to form more complex optical systems.

[0003] Chinese patent CN221406146U discloses a multi-band laser beam expander. This patent adjusts the position of the inner cylinder and lens housing by adjusting a screw-on knob, thereby changing the distance between the input and output lenses and thus adjusting the beam expansion factor to ensure the stability of the beam expander's expansion factor. However, this patent uses a screw thread to install the inner cylinder into the lens housing, which cannot limit the inner cylinder after adjustment. This makes it easy for the inner cylinder to deflect, altering the distance between the input and output lenses and affecting the stability of the beam expander's expansion factor. Therefore, there is an urgent need for a robust, actively cooled integrated structure for laser beam expanders. Utility Model Content

[0004] To overcome the aforementioned deficiencies in the prior art, this application provides an integrated structure for an active heat dissipation laser beam expander. A limiting ring is used to tighten the adjusting ring, thereby limiting the position of the adjusting cylinder after adjustment. This prevents changes in the distance between the input and output lenses due to the deflection of the adjusting cylinder within the integrated cylinder, improving the stability of the beam expander's magnification and ensuring the beam expansion effect, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated structure for an active heat dissipation laser beam expander includes an integrated cylinder and two adjusting cylinders. A beam expander is positioned at the center of the integrated cylinder's inner cavity. An input lens and an output lens are respectively positioned within the inner cavities of the two adjusting cylinders. Adjusting rings are rotatably mounted at both ends of the integrated cylinder. The two adjusting cylinders are positioned outside the two adjusting rings. An extension cylinder is positioned at the end of each adjusting cylinder closest to the integrated cylinder. The extension cylinder passes through the adjusting rings and extends into and communicates with the inner cavity of the integrated cylinder. The extension cylinder can move within the inner cavity of the integrated cylinder by rotating the adjusting rings. A limiting ring is provided on the outer wall of the extension cylinder, and the limiting ring is tightened onto the end face of the adjusting rings to define the position of the adjusting cylinder.

[0007] Preferably, the inner wall of the integrated cylinder is provided with a first threaded groove, and the extension cylinder is threadedly installed in the inner cavity of the integrated cylinder through the first threaded groove.

[0008] Preferably, the end face of the adjusting ring is provided with a second threaded groove, and the extension cylinder is threadedly installed inside the second threaded groove and extends through the adjusting ring to the inner cavity of the integrated cylinder.

[0009] Preferably, a fourth threaded groove is provided on the inner side of the limiting ring, and the limiting ring is threaded onto the outer wall of the extension cylinder through the fourth threaded groove, and the internal thread of the fourth threaded groove is opposite in direction to the internal thread of the second threaded groove.

[0010] Preferably, the end face of the limiting ring is provided with an annular lug surrounding the outside of the fourth threaded groove, and the end face of the adjusting ring is provided with a third threaded groove at the position corresponding to the limiting ring, and the annular lug is threadedly installed inside the third threaded groove.

[0011] Preferably, the end face of the integrated cylinder has a groove around the outside of its inner cavity opening, and the adjusting ring has a convex ring at one end near the integrated cylinder, with the other end of the convex ring rotatably installed inside the groove.

[0012] Preferably, an annular step is provided at the middle position of the inner cavity of the integrated tube, and an opening is provided at the middle position of the annular step. The beam expander is embedded in the inner wall of the opening, and the diameter of the inner cavity opening of the integrated tube is larger than that of the opening.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] By setting a limiting ring on the extension tube, and screwing the limiting ring to one side of the adjusting ring, the annular support on the end face of the limiting ring is installed into the third threaded groove. The limiting ring and the adjusting ring are then tightened to limit the adjusting tube after adjustment, preventing the distance between the input lens and the output lens from changing due to the deflection of the adjusting tube on the integrated tube. This improves the stability of the beam expander's magnification and ensures the beam expansion effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of an integrated structure of an active heat dissipation laser beam expander according to an embodiment of the present invention;

[0017] Figure 2This is a split schematic diagram of an integrated structure of an active heat dissipation laser beam expander according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of an integrated structure of an active heat dissipation laser beam expander according to an embodiment of the present invention.

[0019] Figure 4 This is a three-dimensional schematic diagram of a limiting ring according to an embodiment of the present invention;

[0020] Figure 5 This is a perspective view of an adjusting ring according to an embodiment of the present invention.

[0021] In the figure: 1. Integrated cylinder; 101. First threaded groove; 102. Groove; 11. Adjusting ring; 111. Second threaded groove; 112. Third threaded groove; 113. Protruding ring; 2. Adjusting cylinder; 21. Extension cylinder; 22. Limiting ring; 221. Fourth threaded groove; 222. Annular support lug. Detailed Implementation

[0022] Combination Figures 1-5 As shown in this embodiment, an active heat dissipation laser beam expander integrated structure includes: an integrated cylinder 1 and two adjusting cylinders 2. A beam expander is disposed at the center of the inner cavity of the integrated cylinder 1. An input lens and an output lens are respectively disposed within the inner cavities of the two adjusting cylinders 2. An annular step is disposed at the center of the inner cavity of the integrated cylinder 1, and an opening is formed at the center of the annular step. The beam expander is embedded in the inner wall of the opening, and the diameter of the opening in the inner cavity of the integrated cylinder 1 is larger than the diameter of the opening. By installing the beam expander, input lens, and output lens on the integrated cylinder 1 and adjusting cylinders 2 respectively, the beam expander, input lens, and output lens are assembled into a whole. The beam expander achieves precise magnification of the beam diameter and efficient compression of the divergence angle through the virtual confocal linkage of the input negative lens and the output positive lens.

[0023] In this embodiment, both ends of the integrated cylinder 1 are rotatably mounted with adjusting rings 11, and two adjusting cylinders 2 are respectively disposed on the outer sides of the two adjusting rings 11. An extension cylinder 21 is provided at the end of the adjusting cylinder 2 near the integrated cylinder 1. The extension cylinder 21 passes through the adjusting ring 11 and extends into the inner cavity of the integrated cylinder 1, communicating with the inner cavity. The extension cylinder 21 can move in the inner cavity of the integrated cylinder 1 by rotating the adjusting ring 11. By turning the adjusting ring 11 at the end of the integrated cylinder 1, the extension cylinder 21, which is installed inside the adjusting ring 11 through the second threaded groove 111, is driven to move into the inner cavity of the integrated cylinder 1 and is threaded into the first threaded groove 101 of the inner cavity of the integrated cylinder 1, thereby realizing the installation and position adjustment of the extension cylinder 21.

[0024] In this embodiment, a limiting ring 22 is provided on the outer wall of the extension tube 21, and a fourth threaded groove 221 is provided on the inner side of the limiting ring 22. The limiting ring 22 is threaded onto the outer wall of the extension tube 21 through the fourth threaded groove 221, and the internal thread of the fourth threaded groove 221 is opposite in direction to the internal thread of the second threaded groove 111. By turning the limiting ring 22 on the outer wall of the extension tube 21 through the fourth threaded groove 221, which is opposite in direction to the internal thread of the second threaded groove 111, the position of the limiting ring 22 is adjusted, and the limiting ring 22 is moved to one side of the adjusting ring 11. The limiting ring 22 and the adjusting ring 11 are tightened to limit the adjusting ring 11 and the adjusting tube 2, preventing the distance between the input lens and the output lens from changing due to the deflection of the extension tube 21 in the integrated tube 1, and improving the stability of the beam expansion magnification of the beam expander.

[0025] In this embodiment, the end face of the limiting ring 22 is provided with an annular lug 222 around the outside of the fourth threaded groove 221, and the end face of the adjusting ring 11 is provided with a third threaded groove 112 at the position corresponding to the limiting ring 22. The annular lug 222 is threadedly installed inside the third threaded groove 112. By installing the annular lug 222 into the inside of the third threaded groove 112, the limiting ring 22 is tightly attached to the end face of the adjusting ring 11, which further improves the stability of the limiting ring 22 and the adjusting ring 11 after tightening.

[0026] In this embodiment, the end face of the integrated cylinder 1 is provided with a groove 102 around the outside of its inner cavity opening. The adjusting ring 11 is provided with a protruding ring 113 at one end near the integrated cylinder 1, and the other end of the protruding ring 113 is rotatably installed inside the groove 102. The adjusting ring 11 rotates on the end face of the integrated cylinder 1 through the cooperation of the protruding ring 113 and the groove 102, which can ensure the operation of the position adjustment of the adjusting cylinder 2.

[0027] The working principle of this utility model is as follows: The active heat dissipation laser beam expander integrated structure proposed in this application, by setting an integrated cylinder 1 and an adjusting cylinder 2, installs a beam expander, an input lens, and an output lens respectively, assembling the beam expander, input lens, and output lens into a whole. The beam expander achieves precise magnification of the beam diameter and efficient compression of the divergence angle through the virtual confocal linkage of the input negative lens and the output positive lens. Simultaneously, rotating the adjusting ring 11 at the end of the adjusting cylinder 2 drives the extension cylinder 21, which is installed inside the adjusting ring 11 through the second threaded groove 111, to move into the inner cavity of the integrated cylinder 1 and be threaded into the beam expander. In the first threaded groove 101 inside the integrated cylinder 1, the extension cylinder 21 is installed and its position is adjusted, changing the distance between the input lens and the output lens, thereby adjusting the beam expansion factor of the laser beam. Finally, the limiting ring 22 is moved to one side of the adjusting ring 11, and the annular lug 222 on the end face of the limiting ring 22 is installed into the third threaded groove 112. The limiting ring 22 and the adjusting ring 11 are tightened to limit the adjustment ring 11 and the adjusting cylinder 2, preventing the distance between the input lens and the output lens from changing due to the deflection of the extension cylinder 21 on the integrated cylinder 1, improving the stability of the beam expansion factor of the beam expander, and ensuring the beam expansion effect.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated structure for an actively cooled laser beam expander, comprising: An integrated cylinder (1) and two adjusting cylinders (2) are provided, wherein a beam expander is provided at the middle position of the inner cavity of the integrated cylinder (1), and an input lens and an output lens are respectively provided in the inner cavities of the two adjusting cylinders (2). The integrated cylinder (1) is rotatably mounted with adjusting rings (11) at both ends, and the two adjusting cylinders (2) are respectively located on the outer sides of the two adjusting rings (11). Furthermore, an extension cylinder (21) is provided at one end of the adjusting cylinder (2) near the integrated cylinder (1). The extension cylinder (21) passes through the adjusting ring (11) and extends into the inner cavity of the integrated cylinder (1) and communicates with its inner cavity. The extension cylinder (21) can move in the inner cavity of the integrated cylinder (1) by rotating the adjusting ring (11). A limiting ring (22) is provided on the outer wall of the extension cylinder (21). The limiting ring (22) is screwed on the end face of the adjusting ring (11) to limit the position of the adjusting cylinder (2).

2. The active heat dissipation laser beam expander integrated structure according to claim 1, characterized in that, The inner wall of the integrated cylinder (1) is provided with a first threaded groove (101), and the extension cylinder (21) is threadedly installed in the inner cavity of the integrated cylinder (1) through the first threaded groove (101).

3. The integrated structure of an active heat dissipation laser beam expander according to claim 1, characterized in that, The end face of the adjusting ring (11) is provided with a second threaded groove (111), and the extension cylinder (21) is threaded inside the second threaded groove (111) and extends through the adjusting ring (11) to the inner cavity of the integrated cylinder (1).

4. The active heat dissipation laser beam expander integrated structure according to claim 3, characterized in that, The inner side of the limiting ring (22) is provided with a fourth threaded groove (221). The limiting ring (22) is threaded onto the outer wall of the extension cylinder (21) through the fourth threaded groove (221), and the internal thread of the fourth threaded groove (221) is opposite to the internal thread of the second threaded groove (111).

5. The active heat dissipation laser beam expander integrated structure according to claim 4, characterized in that, The end face of the limiting ring (22) is provided with an annular lug (222) around the outside of the fourth threaded groove (221). The end face of the adjusting ring (11) is provided with a third threaded groove (112) at the position corresponding to the limiting ring (22). The annular lug (222) is threadedly installed inside the third threaded groove (112).

6. The integrated structure of an active heat dissipation laser beam expander according to claim 1, characterized in that, The end face of the integrated cylinder (1) is provided with a groove (102) around the outside of its inner cavity opening. The adjusting ring (11) is provided with a protruding ring (113) at one end near the integrated cylinder (1), and the other end of the protruding ring (113) is rotatably installed inside the groove (102).

7. The integrated structure of an active heat dissipation laser beam expander according to claim 1, characterized in that, An annular step is provided at the middle position of the inner cavity of the integrated tube (1), and an opening is provided at the middle position of the annular step. The beam expander is embedded in the inner wall of the opening, and the diameter of the inner cavity opening of the integrated tube (1) is larger than the diameter of the opening.

Images