A frequency doubling crystal holding device
By combining mechanical hard connections and thermally conductive materials, the problems of unstable position and poor heat dissipation of the frequency doubling crystal were solved, thus achieving stability and efficiency of frequency doubling laser output.
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG CHENJING PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-03
Smart Images
Figure CN224458921U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser auxiliary structure technology, and in particular to a frequency doubling crystal clamping device. Background Technology
[0002] Frequency-doubling crystals are key components in ultraviolet laser generation. They generate heat during operation, and if this heat is not dissipated promptly, it will severely impact their performance, ultimately failing to produce lasers that meet technical specifications. Furthermore, frequency-doubling crystals are highly sensitive to the incident angle of the frequency-doubled light; they can only achieve maximum frequency doubling efficiency under suitable incident angle conditions. Otherwise, the frequency doubling efficiency will decrease or even cease altogether.
[0003] Traditionally, to adjust the angle of a frequency-doubling crystal, the crystal and clamping device are fixed together on a two-dimensional angle adjustment frame. The position of the frame is adjusted by regulating the extension and retraction of springs on the frame. While this method effectively adjusts the crystal's position, fatigue defects in the springs of the two-dimensional angle adjustment frame prevent it from maintaining the crystal's positional stability over the long term. Consequently, the long-term stability of the frequency-doubling laser output cannot be guaranteed. Furthermore, this method is not conducive to heat dissipation from the crystal. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a frequency doubling crystal clamping device that fixes the position of the frequency doubling crystal by mechanical hard connection, which can well ensure the positional stability of the frequency doubling crystal.
[0005] To achieve the above objectives, this utility model provides a frequency doubling crystal clamping device, comprising: a base, an upper pressure plate, a lower pressure plate, a first screw group, a second screw group, and a third screw group;
[0006] A rotating shaft is provided at the lower part of the base, and a frequency doubling crystal is clamped between the upper pressure plate and the lower pressure plate. The upper pressure plate and the lower pressure plate are fixed by a first set of screws.
[0007] The lower pressure plate is fixedly connected to the base by a second set of screws;
[0008] The base is fixed to the bottom plate of the laser housing by a third set of screws.
[0009] More preferably, the contact surface between the base and the lower pressure plate is machined into a matching arc surface.
[0010] More preferably, the top of both the left and right ends of the lower pressure plate is provided with spherical washers, and the spherical washers have a central cavity for accommodating the second screw assembly. The spherical washers cooperate with the second screw assembly to fix the lower pressure plate on the base.
[0011] More preferably, the upper pressure plate is an L-shaped plate placed horizontally.
[0012] More preferably, the top of the center of the lower pressure plate is provided with a boss.
[0013] More preferably, the bosses on the top of the upper pressure plate and the lower pressure plate cooperate to form a cavity for accommodating the frequency doubling crystal.
[0014] Preferably, the base, upper pressure plate, and lower pressure plate are all made of pure copper material with good thermal conductivity, and the surface is polished and gold-plated.
[0015] The frequency doubling crystal clamping device disclosed in this application has at least the following advantages compared with the prior art:
[0016] The device in this application has no elastic elements; the position of the frequency doubling crystal is fixed by mechanical hard connection. Therefore, this device can effectively ensure the positional stability of the frequency doubling crystal. At the same time, the components are made of good thermally conductive materials and the surfaces of the components are precision machined and gold-plated, so this device also has good thermal conductivity and can effectively dissipate heat from the frequency doubling crystal. Attached Figure Description
[0017] Figure 1 A schematic diagram of the frequency doubling crystal clamping device provided by this utility model.
[0018] Figure 2 This is a cross-sectional view of the present invention along the horizontal central axis.
[0019] Figure 3 This is a cross-sectional view of the present invention along the vertical central axis.
[0020] In the picture:
[0021] 1-Base; 2-Lower pressure plate; 3-Upper pressure plate; 4-Spherical washer; 5-First screw group; 6-Frequency doubling crystal; 7-Second screw group; 8-Third screw group. Detailed Implementation
[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1 As shown, one embodiment of the present invention provides a frequency doubling crystal clamping device, including: a base 1, an upper pressure plate 3, a lower pressure plate 2, a first screw group 5, a second screw group 7, and a third screw group 8;
[0024] The base 1 is provided with a rotating shaft at its lower part, and the frequency doubling crystal 6 is clamped between the upper pressure plate 3 and the lower pressure plate 2. The upper pressure plate 3 and the lower pressure plate 2 are fixed by the first screw group 5.
[0025] The lower pressure plate 2 and the base 1 are fixedly connected by the second screw group 7;
[0026] The base 1 is fixed to the bottom plate of the laser housing by the third screw group 8.
[0027] like Figure 3 As shown, the contact surfaces of the base 1 and the lower pressure plate 2 are machined into matching arc surfaces.
[0028] The top of both the left and right ends of the lower pressure plate 2 is provided with spherical washers 4. The spherical washers 4 have a central cavity, which is used to accommodate the second screw group 7. The spherical washers 4 cooperate with the second screw group 7 to fix the lower pressure plate 2 on the base 1.
[0029] The upper pressure plate 3 is an L-shaped plate placed horizontally.
[0030] The top of the center of the lower pressure plate 2 is provided with a boss.
[0031] The upper pressure plate 3 and the boss on the top of the lower pressure plate 2 cooperate to form a cavity to accommodate the frequency doubling crystal 6.
[0032] The base 1, upper pressure plate 3, and lower pressure plate 2 are all made of pure copper material with good thermal conductivity, and the surface is polished and plated with gold.
[0033] The base functions to transfer heat and support the lower pressure plate. A rotating shaft is machined at the bottom of the base, allowing it to rotate around the vertical Z-axis. The upper and lower pressure plates are combined by the first screw group 5, which both clamps the frequency doubling crystal and transfers the heat generated during its operation. The contact surfaces between the base and the lower pressure plate are machined into matching arc surfaces, enabling the rotation of the other axis of the frequency doubling crystal during debugging. After the angle is adjusted, the base and the lower pressure plate are fixed by the second screw group 7. It is important to note that the contact surface between the spherical washer and the lower pressure plate is machined into a matching spherical surface. This is because when the lower pressure plate rotates a certain angle relative to the base around the X-axis, if a regular flat washer is used, the result is that the second screw group 7 and the fixed part are in line contact rather than surface contact, which can easily cause unstable connection. Therefore, the spherical washer ensures the stability of the relative position of the lower pressure plate and the base. The third screw group 8 fixes the base to the laser housing base plate, ensuring the stability of the relative position of the base.
[0034] To achieve good heat dissipation for the frequency doubling crystal, the base, upper pressure plate, and lower pressure plate in this device are all made of pure copper, which has good thermal conductivity, and all require surface polishing and gold plating. All mating surfaces between the components of this device require precision machining. The surface roughness Ra value of the contact surfaces between the upper and lower pressure plates and the frequency doubling crystal, the arc-shaped mating surface between the lower pressure plate and the base, and the mating surface between the base and the housing are designed to be Ra=0.8.
[0035] The device is characterized by the absence of elastic elements; the position of the frequency doubling crystal is fixed by mechanical rigid connections, thus ensuring the positional stability of the frequency doubling crystal. Furthermore, the components are made of high-quality thermally conductive materials, and their surfaces are precision-machined and gold-plated, resulting in excellent thermal conductivity and effective heat dissipation for the frequency doubling crystal.
[0036] Tests have proven that the device fully meets the usage requirements, and the temperature control accuracy of the frequency doubling crystal can reach 0.1β, which effectively ensures the stability of the frequency doubling laser output parameters.
[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A frequency doubling crystal holding device, characterized by include: Base, upper pressure plate, lower pressure plate, first screw group, second screw group and third screw group; A rotating shaft is provided at the lower part of the base, and a frequency doubling crystal is clamped between the upper pressure plate and the lower pressure plate. The upper pressure plate and the lower pressure plate are fixed by a first set of screws. The lower pressure plate is fixedly connected to the base by a second set of screws; The base is fixed to the bottom plate of the laser housing by a third set of screws.
2. The frequency doubling crystal clamping device of claim 1, wherein, The contact surfaces of the base and the lower pressure plate are machined into matching arc surfaces.
3. The frequency doubling crystal clamping device of claim 1, wherein, The lower pressure plate is provided with spherical washers at the top of both the left and right ends. The spherical washers have a central cavity for accommodating the second screw assembly. The spherical washers cooperate with the second screw assembly to fix the lower pressure plate on the base.
4. The frequency doubling crystal clamping device according to claim 1, characterized in that, The upper pressure plate is an L-shaped plate placed horizontally.
5. The frequency doubling crystal clamping device according to claim 4, characterized in that, The top of the center of the lower pressure plate is provided with a boss.
6. The frequency doubling crystal clamping device of claim 5, wherein, The upper pressure plate and the boss on the top of the lower pressure plate cooperate to form a cavity to accommodate the frequency doubling crystal.
7. The frequency doubling crystal clamping device of claim 1, wherein, The base, upper pressure plate, and lower pressure plate are all made of pure copper material with good thermal conductivity, and the surface is polished and plated with gold.