An angle-adjustable frequency-doubling crystal fixing device

Abstract

This invention provides an angle-adjustable frequency doubling crystal fixing device, relating to the technical field of optical frequency doubling crystal installation and fixing, and angle adjustment devices. It includes a frequency doubling crystal base, a pressure block, a spring, a cover plate, a rotating base, and a locking block connected in sequence. The frequency doubling crystal base is rotatably mounted on a rotating base, with the frequency doubling crystal installed in the center of the base. The pressure block is mounted on the base, and one end of the spring abuts against the pressure block, while the other end abuts against the cover plate. The rotating base and the frequency doubling crystal base are locked together by the locking block. This invention's frequency doubling crystal fixing device can adjust the horizontal rotation and vertical pitch angle of the frequency doubling crystal, achieving precise laser incident angle. All connecting parts are fixed with screws, ensuring strong fastening and preventing displacement of the frequency doubling crystal during long-term operation. This invention also incorporates a heating rod and a thermistor to form a thermal control module, enabling precise temperature control of the frequency doubling crystal.

Description

Technical Field

[0001] This utility model relates to the technical field of mounting and fixing optical frequency doubling crystals and angle adjustment devices, and in particular to a frequency doubling crystal fixing device with adjustable angle. Background Technology

[0002] The core function of a frequency-doubling crystal is to double the frequency of the fundamental light output by a laser using nonlinear optical effects, thereby obtaining a shorter wavelength laser output. This wavelength conversion capability not only greatly expands the spectral coverage and application scenarios of lasers—for example, infrared lasers, which are originally good at processing certain materials, can be converted into green or ultraviolet light through frequency doubling, enabling efficient processing of highly reflective metals such as copper and gold for precision micromachining, photolithography, and spectral analysis—but also significantly increases the energy of the output photons, improving the efficiency of laser-machining interactions with matter and meeting the stringent requirements for high-energy, high-photon energy in applications such as high-precision ablation, initiation of specific photochemical reactions, and selective action on biological tissues. The core physical condition for the efficient occurrence of the frequency doubling process is phase matching (wave vector matching), which is usually achieved through the birefringence properties of the crystal (angle tuning matching). The receiving angle of a frequency-doubling crystal is on the order of milliradians. Conventional frequency-doubling crystal fixing devices have non-adjustable angles, and even a small deviation (usually ≤0.1°) leads to a sharp drop in conversion efficiency, failing to meet the fine angle control requirements of high-energy lasers. Utility Model Content

[0003] To address the above technical problems, this utility model provides an angle-adjustable frequency doubling crystal fixing device. The frequency doubling crystal is fixed to a frequency doubling crystal base. A pressure block is installed above the crystal, and a spring can be installed on the pressure block. A cover plate is installed above the spring and fixed to the frequency doubling crystal mounting base with screws. The spring force provides pre-tightening force to the frequency doubling crystal, preventing displacement. Rotating shafts are provided on both sides of the frequency doubling crystal mounting base, allowing the mounting base to be mounted on a rotating base. Rotating the shafts allows for adjustment of the frequency doubling crystal's pitch angle. The rotating base is mounted on an operating plane and fixed with four screws. The screw holes are arc-shaped, allowing for a certain rotational adjustment angle. Adjusting the angles of the frequency doubling crystal base and the rotating base ensures accurate laser incident angle. A heating rod and a thermistor can be installed in the frequency doubling crystal base to achieve real-time temperature control of the frequency doubling crystal, improving its operational stability.

[0004] This utility model has the following beneficial effects:

[0005] This invention relates to a frequency doubling crystal fixing device that allows adjustment of the horizontal rotation and vertical pitch angles of the frequency doubling crystal, achieving precision in laser incident angle. All connecting parts are secured with screws, ensuring strong fastness and preventing displacement of the frequency doubling crystal during prolonged operation. The device also incorporates a heating rod and a thermistor to form a thermal control module, enabling precise temperature control of the frequency doubling crystal. Attached Figure Description

[0006] Figure 1 This is an overall view of the device of this utility model;

[0007] Figure 2 This is an assembly structure diagram of the frequency doubling crystal base;

[0008] Figure 3 This is a structural diagram of the frequency doubling crystal base;

[0009] Figure 4 This is a diagram of the compaction block structure;

[0010] Figure 5 This is a schematic diagram of a spring;

[0011] Figure 6 This is a structural diagram of the cover plate;

[0012] Figure 7 This is a structural diagram of the rotating base;

[0013] Figure 8 This is a diagram of the lock block structure. Detailed Implementation

[0014] A specific example of this utility model discloses an angle-adjustable frequency doubling crystal fixing device, such as... Figures 1 to 8 As shown, it includes a frequency doubling crystal base 100, a pressure block 200, a spring 300, a cover plate 400, a rotating base 500, and a locking block 600 connected in sequence.

[0015] In this embodiment, the frequency doubling crystal base 100 has rotating shafts 130 on both sides, which can be placed on the grooves 520 of the rotating base 500 to adjust the pitch angle of the frequency doubling crystal. The frequency doubling crystal base 100 has a central placement position for the frequency doubling crystal, with a support platform 150 in the middle to support the pressure block 200. Heating rod 110 mounting holes and thermistor 120 mounting holes are provided below the frequency doubling crystal base to achieve temperature control of the frequency doubling crystal. Four threaded holes 140 are provided above the frequency doubling crystal base 100 to accommodate the installation of a cover plate.

[0016] Two spring holes 210 are provided on the top of the pressure block 200 for holding the spring 300. The spring 300 is placed vertically in the spring holes, with one end of the spring 300 abutting against the pressure block 200 and the other end abutting against the cover plate 400. The spring force provides preload force for the frequency doubling crystal. The cover plate 400 is installed on the upper part of the spring 300, and four mounting holes 410 are provided at its four corners. It is fixed to the frequency doubling crystal base 100 with screws, while simultaneously pressing the spring 300.

[0017] The rotating base 500 is used to mount the optical platform. Four screw holes 510 are provided at the bottom; these holes are arc-shaped, allowing for some horizontal rotation adjustment. A rotating shaft 130 and mounting groove 520 are provided at the top for mounting the frequency doubling crystal base 100. A cable channel 530 and cable fixing holes 540 are provided on one side. The cables for the heating rod 110 and thermistor 120 pass through the cable channel 530 and are secured with screws in the cable fixing holes 540, ensuring a stable installation and preventing obstruction of the laser path. Optical apertures 550 are provided at the front and rear of the rotating base 500 to ensure the front and rear surfaces of the frequency doubling crystal are fully exposed. Four locking quick-mount holes 560 are provided at the top of the rotating base 500 for mounting locking blocks 600.

[0018] The locking blocks 600 are a pair, which are centrally symmetrical during installation. They are provided with two threaded holes 610 to be installed on the rotating base 500. A protrusion 620 is provided at the front of the locking block 600 to fix the frequency doubling crystal base 100. When the locking block 600 is installed on the rotating base 500, the protrusion 620 is located in front of and behind the frequency doubling crystal base 100, which hinders the adjustment of the pitch angle of the frequency doubling crystal base and realizes the locking of the pitch angle.

[0019] In this embodiment, after the frequency doubling crystal is installed, the heating rod 110 is first set to the theoretically optimal temperature of the frequency doubling crystal. The rotating base is then adjusted by 500 degrees to allow the laser to enter the center of the frequency doubling crystal. Next, the base of the frequency doubling crystal is adjusted by 100 degrees to maximize the frequency doubling efficiency. The temperature setting of the heating rod 110 is then finely adjusted until the frequency doubling efficiency reaches its maximum.

Claims

1. An angle adjustable frequency doubling crystal fixing device, characterized in that, It includes a frequency doubling crystal base, a pressure block, a spring, a cover plate, a rotating base, and a locking block connected in sequence; the frequency doubling crystal base is rotatably mounted on the rotating base, the frequency doubling crystal is installed in the middle of the frequency doubling crystal base, the pressure block is mounted on the frequency doubling crystal base, one end of the spring abuts against the pressure block, and the other end abuts against the cover plate, and the rotating base and the frequency doubling crystal base are locked together by the locking block.

2. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, A heating rod mounting hole and a thermistor mounting hole are provided below the frequency doubling crystal base.

3. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, A spring hole is provided above the pressure block to hold the spring. The spring is placed vertically in the spring hole, and the spring force is used to provide the preload force for the frequency doubling crystal.

4. An angle adjustable frequency doubling crystal fixing device according to claim 3, characterized in that, The cover plate is installed on the upper part of the spring and fixed to the frequency doubling crystal base with screws, while simultaneously pressing the spring.

5. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, The bottom of the rotating base has screw holes, which are arc-shaped, allowing the rotating base to rotate horizontally.

6. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, The upper part of the rotating base is provided with a mounting groove for mounting the rotating shaft of the frequency doubling crystal base.

7. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, The rotating base has a cable channel and a cable fixing hole on one side. The cables of the heating rod and thermistor pass through the cable channel and are fixed with screws in the cable fixing hole.

8. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, Optical apertures are set at the front and back of the rotating base to ensure that the front and back surfaces of the frequency doubling crystal are fully exposed.

9. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, Four locking quick-installation holes are provided above the rotating base for installing locking blocks.

10. The angle adjustable frequency doubling crystal fixing device according to claim 1, characterized in that, The locking blocks are a pair, which are centrally symmetrical during installation. They are equipped with two threaded holes to be installed on the rotating base. A protrusion is provided on the front of the locking block to fix the frequency doubling crystal base.

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