Precise fine-tuning laser collimator with calibration function

Abstract

According to the technical scheme, the laser collimator is characterized in that the laser collimator comprises an output flange, and a fine adjustment lower base body is fixedly installed on the top face of the output flange; during calibration, the fine adjustment rotating ring is rotated to the middle position, the scale indicating machine meter screw of the lens mounting base body indicates that the middle scale is the initial position, then the calibration adjusting ring is loosened and rotated to adjust the position of the optical fiber interface, the light beam output by the laser collimator reaches the calibrated collimated parallel light beam state, and finally the fine adjustment rotating ring is locked again to complete calibration. During precise fine adjustment, firstly, a screw on the side face of the lower fine adjustment base body is loosened to release the fixing state of the lower fine adjustment base body, then the fine adjustment rotating ring is rotated, the position of the lens installation base body is adjusted to find the needed focal plane and the needed light spot size, the quality and stability of laser beams are optimized, and finally, after adjustment is completed, the lens installation base body is fixed to the lens installation base body. And the screw on the side surface of the fine-tuning lower base body is re-locked to ensure stable adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber lasers, and particularly relates to a laser collimator with calibration and precise fine-tuning. Background Technique

[0002] Laser additive manufacturing with free manufacturing characteristics has become one of the most important processing and manufacturing technologies at present, especially for precision parts with relatively complex structures and parts with low material utilization rates. As an important part of the laser processing system, the laser collimator directly affects the characteristics and quality of the laser beam. Currently, laser 3D printing (SLM) basically uses single-mode fiber lasers, and the output beam is a typical Gaussian beam with a beam quality M^2 < 1.2. The quality and stability of the beam quality after collimation output directly affect the surface roughness and surface quality stability of the final printed product. If the collimation effect is poor or the stability is poor, it will lead to a decline in the quality of the printed parts, and even the scrapping of the printed parts.

[0003] Therefore, it is necessary to solve the problems of different deviations and divergence angles of the QBH output focus of fiber lasers in the market, eliminate the deviation of the QBH output focus of fiber lasers, and achieve high consistency of the output beam. To solve the above problems, we propose a laser collimator with calibration and precise fine-tuning to achieve the precision consistency and stability of the quality of laser 3D printing. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a laser collimator with calibration and precise fine-tuning to solve the problems raised in the background technique.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A laser collimator with calibration and precise fine-tuning includes: an output flange, a fine-tuning lower base is fixedly installed on the top surface of the output flange, a fine-tuning rotating ring is arranged outside the fine-tuning lower base, a lens mounting base is arranged inside the fine-tuning rotating ring, a composite laser collimating lens is fixedly installed inside the lens mounting base, a lens retaining ring is arranged on the top surface of the composite laser collimating lens, a clearance-eliminating compression spring is arranged on the top surface of the lens retaining ring, a fine-tuning upper base is arranged inside the fine-tuning rotating ring, a focal length adjustment connecting member is arranged inside the fine-tuning upper base, a calibration guiding base is arranged inside the focal length adjustment connecting member, a calibration adjustment ring is arranged inside the calibration guiding base, an optical fiber interface is arranged inside the calibration adjustment ring, and an optical fiber plug is arranged inside the optical fiber interface.

[0007] Preferably, the fiber optic plug is inserted into the fiber optic interface and connected through a locking mechanism, and the fiber optic interface is moved up and down in the calibration guide body by adjusting the calibration adjustment ring.

[0008] By adopting the above technical solution, the stable connection between the laser and the collimator is ensured by inserting and locking the fiber optic plug into the fiber optic interface. At the same time, adjusting the calibration adjustment ring can move the fiber optic interface up and down in the calibration guide body, so as to achieve precise calibration of the laser beam and make up for the manufacturing deviation of the plug and the focal length deviation of the lens.

[0009] Preferably, the designed length of the focal length adjustment connecting piece is adjustable to adapt to the designs of laser collimators with different focal lengths.

[0010] By adopting the above technical solution, the designed length of the focal length adjustment connecting piece can be adjusted to adapt to the designs of laser collimators with different focal lengths, which enables the laser collimator to be used in different applications and meet various focal length requirements.

[0011] Preferably, a composite laser collimating lens is fixedly installed inside the lens mounting base body and pressed tightly by a lens retaining ring. The lens mounting base body and the fine-tuning lower base body are matched through the external threads and grooves to ensure the coaxiality of the laser beam and the lens.

[0012] By adopting the above technical solution, the composite laser collimating lens is fixedly installed inside the lens mounting base body, the stability of the lens is ensured by the lens retaining ring, and the coaxiality of the lens and the fine-tuning lower base body is ensured by the external thread and groove design, so as to maintain the consistency and stability of the laser beam.

[0013] Preferably, the inside of the fine-tuning rotating ring is connected to the lens mounting base body through threads, and adjusting the fine-tuning rotating ring realizes the up and down movement of the lens mounting base body.

[0014] By adopting the above technical solution, the fine-tuning rotating ring is connected to the lens mounting base body through threads, and adjusting the fine-tuning rotating ring can realize the up and down movement of the lens mounting base body, which allows for fine adjustment of the lens position and thus optimizes the collimation effect of the laser beam.

[0015] Preferably, the mating surfaces at the upper and lower ends of the inner circle of the fine-tuning rotating ring are matched with the fine-tuning upper base body and the fine-tuning lower base body, and sealing grooves are machined on the mating surfaces and O-rings are installed to prevent dust. The lower end of the outer circular surface of the fine-tuning rotating ring is marked with scales.

[0016] By adopting the above technical solution, the mating surfaces at the upper and lower ends of the inner circle of the fine-tuning rotating ring are matched with the fine-tuning upper base body and the fine-tuning lower base body, and sealing grooves and O-rings are installed to prevent dust from entering. This improves the durability of the collimator and maintains the long-term stability of the internal components. The scale markings on the lower end of the outer circular surface of the rotating ring facilitate recording the results of fine adjustments.

[0017] In summary, the main beneficial effects of the present utility model are as follows:

[0018] 1. By adjusting the up-and-down movement of the calibration adjustment ring and the fiber optic interface, the manufacturing deviation of the fiber optic plug and the focal length deviation of the lens are effectively compensated, thereby achieving a high degree of consistency and precise output of the laser beam. The designed length of the focal length adjustment connecting member is adjustable, allowing the laser collimator to adapt to the requirements of different focal lengths and meet the requirements of various application scenarios.

[0019] 2. Through the lens retaining ring and the backlash elimination compression spring, it is ensured that the lens will not loosen during the adjustment process, thereby maintaining the stability and consistency of the laser beam. The fine-tuning rotating ring can achieve precise up-and-down movement of the lens mounting base, optimize the collimation effect of the laser beam, and maintain the stability of the beam quality, thus providing a laser collimator with high precision, flexible adjustment, stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 is a sectional structural schematic diagram of the fine-tuning upper base of the present utility model.

[0022] Reference numerals: 1. Fiber optic plug; 2. Fiber optic interface; 3. Calibration adjustment ring; 4. Calibration guide base; 5. Focal length adjustment connecting member; 6. Fine-tuning upper base; 7. Backlash elimination compression spring; 8. Lens retaining ring; 9. Composite laser collimation lens; 10. Lens mounting base; 11. Fine-tuning rotating ring; 12. Fine-tuning lower base; 13. Output flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present utility model under the premise of the concept of the present utility model all fall within the protection scope required by the present utility model.

[0025] Refer to Figure 1 - Figure 2 , a laser collimator with calibration and precise fine-tuning, comprising:

[0026] Output flange 13, on the top surface of the output flange 13, a fine-tuning lower base 12 is fixedly installed. Outside the fine-tuning lower base 12, a fine-tuning rotating ring 11 is provided. Inside the fine-tuning rotating ring 11, a lens mounting base 10 is provided. Inside the lens mounting base 10, a composite laser collimating lens 9 is fixedly installed. On the top surface of the composite laser collimating lens 9, a lens retaining ring 8 is provided. On the top surface of the lens retaining ring 8, a clearance-eliminating compression spring 7 is provided. Inside the fine-tuning rotating ring 11, a fine-tuning upper base 6 is provided. Inside the fine-tuning upper base 6, a focal length adjustment connecting member 5 is provided. Inside the focal length adjustment connecting member 5, a calibration guiding base 4 is provided. Inside the calibration guiding base 4, a calibration adjustment ring 3 is provided. Inside the calibration adjustment ring 3, an optical fiber interface 2 is provided. Inside the optical fiber interface 2, an optical fiber plug 1 is provided.

[0027] Reference Figure 1 - Figure 2 The optical fiber plug 1 is inserted into the optical fiber interface 2 and connected through a locking mechanism. By adjusting the calibration adjustment ring 3, the optical fiber interface 2 can move up and down within the calibration guiding base 4. By inserting and locking the optical fiber plug 1 into the optical fiber interface 2, the stable connection between the laser and the collimator is ensured. At the same time, adjusting the calibration adjustment ring 3 can move the optical fiber interface 2 up and down within the calibration guiding base 4, thereby realizing the precise calibration of the laser beam, compensating for the manufacturing deviation of the plug and the focal length deviation of the lens. The designed length of the focal length adjustment connecting member 5 is adjustable to adapt to the designs of laser collimators with different focal lengths. By the adjustable designed length of the focal length adjustment connecting member 5, it can adapt to the designs of laser collimators with different focal lengths, which enables the laser collimator to be used in different applications and meet various focal length requirements.

[0028] Reference Figure 1 - Figure 2 Inside the lens mounting base 10, a composite laser collimating lens 9 is fixedly installed and tightened by the lens retaining ring 8. The lens mounting base 10 and the fine-tuning lower base 12 are matched through the external threads and grooves to ensure the coaxiality of the laser beam and the lens. By fixedly installing the composite laser collimating lens 9 inside the lens mounting base 10 and ensuring the stability of the lens through the lens retaining ring 8, the external thread and groove design ensure the coaxiality of the lens and the fine-tuning lower base 12, thereby maintaining the consistency and stability of the laser beam. The fine-tuning rotating ring 11 is connected to the lens mounting base 10 through threads inside. Adjusting the fine-tuning rotating ring 11 realizes the up and down movement of the lens mounting base 10. By connecting the fine-tuning rotating ring 11 to the lens mounting base 10 through threads and adjusting the fine-tuning rotating ring 11, the up and down movement of the lens mounting base 10 can be achieved, which allows for fine adjustment of the lens position, thereby optimizing the collimation effect of the laser beam.

[0029] Reference Figure 1 - Figure 2, the upper and lower mating surfaces of the inner circle of the fine-tuning rotating ring 11 are matched with the fine-tuning upper base 6 and the fine-tuning lower base 12. Sealing grooves are machined on the mating surfaces, and O-rings are installed to prevent dust. The lower end of the outer circle surface of the fine-tuning rotating ring 11 is marked with scales. By matching the upper and lower mating surfaces of the inner circle of the fine-tuning rotating ring 11 with the fine-tuning upper base 6 and the fine-tuning lower base 12, and installing sealing grooves and O-rings, dust entry is prevented, which improves the durability of the collimator and maintains the long-term stability of the internal components. The scale markings at the lower end of the outer circle surface of the rotating ring facilitate recording the results of fine adjustments.

[0030] Working principle: Please refer to Figure 1 - Figure 2 As shown, when calibrating, rotate the fine-tuning rotating ring 11 to the middle position so that the scale of the lens mounting base 10 indicates the middle scale zero scale. Taking this as the initial position, then loosen the calibration guiding base 4 and rotate the calibration adjustment ring 3 to adjust the position of the fiber optic interface 2 so that the beam output by the laser collimator reaches the calibrated collimated parallel beam state. Finally, re-lock to complete the calibration to ensure the consistency and accuracy of the laser output. When making precise fine-tuning, first, loosen the screw on the side of the fine-tuning lower base 12 to release the fixed state of the fine-tuning lower base 12, and then rotate the fine-tuning rotating ring 11 to adjust the position of the lens mounting base 10 to find the desired focal plane and spot size, optimizing the quality and stability of the laser beam. After the adjustment is completed, re-lock the screw on the side of the fine-tuning lower base 12 to ensure the stability of all adjustment settings.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those with ordinary skills in the field to which the present invention belongs. The words such as "including" or "comprising" used in the present invention mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" do not limit to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The "upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser collimator with calibration and fine adjustment, characterized in that: include: An output flange (13) is fixedly mounted on the top surface of the output flange (13), a fine-tuning lower base (12) is arranged outside the fine-tuning lower base (12), a lens mounting base (10) is arranged inside the fine-tuning rotating ring (11), a composite laser collimating lens (9) is fixedly mounted inside the lens mounting base (10), a lens pressing ring (8) is arranged on the top surface of the composite laser collimating lens (9), and a lens pressing ring (8) is arranged on the top surface of the lens pressing ring (8). A clearance eliminating compression spring (7) is arranged, a fine-adjusting upper base (6) is arranged inside the fine-adjusting rotating ring (11), a focus adjustment connecting piece (5) is arranged inside the fine-adjusting upper base (6), a calibration guide base (4) is arranged inside the focus adjustment connecting piece (5), a calibration adjustment ring (3) is arranged inside the calibration guide base (4), an optical fiber interface (2) is arranged inside the calibration adjustment ring (3), and an optical fiber plug (1) is arranged inside the optical fiber interface (2).

2. The laser collimator with calibration and fine adjustment according to claim 1, characterized in that: The optical fiber plug (1) is inserted into the optical fiber interface (2) and connected via a locking mechanism, and the optical fiber interface (2) is moved up and down within the calibration guide base (4) by adjusting the calibration adjustment ring (3).

3. The laser collimator with calibration and fine adjustment according to claim 1, characterized in that: The design length of the focal length adjustment connecting piece (5) can be adjusted to adapt to the design of laser collimators with different focal lengths.

4. The laser collimator with calibration and fine adjustment according to claim 1, characterized in that: A composite laser collimating lens (9) is fixedly mounted inside the lens mounting base (10) and is pressed by a lens pressing ring (8). The lens mounting base (10) cooperates with a fine-tuning lower base (12) through external threads and grooves thereof to ensure the coaxiality of the laser beam and the lens.

5. The laser collimator with calibration and fine adjustment according to claim 1, characterized in that: The interior of the fine-tuning rotating ring (11) is connected to the lens mounting base (10) via a thread, and the lens mounting base (10) can be moved up and down by adjusting the fine-tuning rotating ring (11).

6. The laser collimator with calibration and fine adjustment according to claim 1, characterized in that: The matching surfaces at the upper and lower ends of the inner circle of the fine-tuning rotating ring (11) match with the fine-tuning upper base (6) and the fine-tuning lower base (12), and sealing grooves are processed on the matching surfaces and O-rings are installed to prevent dust. The lower end of the outer circle of the fine-tuning rotating ring (11) is engraved with scales.

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