A focus-adjustable high-power laser alignment system

Abstract

The present invention relates to a focus-adjustable high-power laser collimation system, which includes a standard adapter for optical fiber connector, a sealing bracket, a transition bracket, a moving tube, a fixed bracket, a threaded adjustment ring, a collimation bracket and a collimation lens; the standard adapter for optical fiber connector is connected to the sealing bracket, the sealing bracket cooperates with and is fixed to the transition bracket, and the whole is coaxially matched with the moving tube; the collimation lens is installed on the collimation bracket and is fixed to the fixed bracket as a whole; the threaded adjustment ring and the collimation bracket are installed by threaded matching; the fixed bracket and the collimation bracket are threadedly connected, and both have a rotational limiting function, and the rotating threaded adjustment ring controls the linear movement of the collimation bracket to realize continuous adjustment of the collimation lens to the optical fiber position. Compared with the prior art, the present invention has the advantage of realizing free adjustment of focal length.

Description

Technical Field

[0001] The invention relates to the field of laser technology, and in particular to a focus-adjustable high-power laser alignment system. Background Art

[0002] Since the birth of the first ruby ​​laser, laser technology has developed rapidly. High-power fiber lasers have the advantages of high power density, good directionality, and good beam quality. They have developed rapidly in recent years and are widely used in military, communication, medical and other fields. Since the light beam emitted by the fiber laser has a certain divergence angle, the laser energy density will decay and the spot area will increase after propagating over a certain distance. Therefore, in practical applications, the beam needs to be collimated to ensure that the laser parameters such as energy and spot shape meet the requirements.

[0003] At present, the commonly used laser lens systems on the market mainly realize the collimation of lasers through the combination of multiple lenses or aspherical mirrors in optical design. For example, Chinese invention patent application CN107991788A discloses a structure through a three-lens combination, and Chinese utility model patent CN209281092U discloses a four-lens collimation structure. However, this type of collimating lens system has the following disadvantages: first, it cannot focus; second, under high-power use, the aberration caused by the lens deformation due to the thermal effect will seriously affect the laser collimation effect, resulting in a significant reduction in the function of the instrument, and even damage the lens, making the equipment unable to work.

[0004] Therefore, it is urgent to design a laser alignment system that can realize free adjustment of focal length and solve the thermal effect problem caused by high power. Summary of the invention

[0005] The purpose of the present invention is to provide a focus-adjustable high-power laser alignment system in order to overcome the defects of the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a focus-adjustable high-power laser alignment system, which comprises a standard adapter for an optical fiber joint, a sealing bracket, a transition bracket, a moving tube, a fixed bracket, a threaded adjustment ring, a alignment bracket and a collimating lens;

[0008] The optical fiber connector standard adapter is connected to the sealing bracket, and the sealing bracket cooperates with and is fixed to the transition bracket, and is integrally coaxial with the moving tube; the collimating lens is mounted on the collimating bracket and is integrally fixed to the fixed bracket; the threaded adjustment ring and the collimating bracket are installed by threaded cooperation; the fixed bracket and the collimating bracket are threadedly connected, and both have a rotation limiting function, and the rotating threaded adjustment ring controls the linear movement of the collimating bracket to realize continuous adjustment of the collimating lens to the optical fiber position;

[0009] The high-power laser is connected to the laser collimation system through a standard optical fiber connector adapter and output through a collimating lens.

[0010] Preferably, the sealing bracket and the transition bracket are fixed together by bolts.

[0011] Preferably, the collimating lens is mounted on a collimating bracket, and the lens is pressed by a fixed pressure ring and a gasket.

[0012] Preferably, sliding pads are installed in the fixing bracket and the collimating bracket to prevent the threaded adjustment ring from getting stuck when rotating to adjust the focal length.

[0013] Preferably, the sliding pad is made of polytetrafluoroethylene.

[0014] Preferably, the laser alignment system further includes a water cooling module.

[0015] Preferably, the water cooling module connects the cooling water to the cooling water channel provided in the collimating bracket through the collimating bracket water cooling joint to cool the collimating lens.

[0016] Preferably, the water cooling module connects the cooling water to the cooling water channel provided in the moving cylinder through the moving cylinder water cooling joint to cool the moving cylinder.

[0017] Preferably, the water cooling module connects cooling water to a cooling water channel provided in the sealing bracket through a sealing bracket water cooling joint for water cooling.

[0018] Preferably, the water-cooling joint includes a water-cooling joint input end and a water-cooling joint output end. The cooling water output by the external water cooling system is connected through the water-cooling joint input end and input back into the external water cooling system through the water-cooling joint output end to form a cooling circuit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The present invention can freely realize the focusing of the collimation system by rotating the focusing component;

[0021] 3) The collimation system designed by the present invention has the advantages of simple structure, convenient operation and wide application range, and can realize the collimation of high-power laser;

[0022] 2) The present invention achieves temperature control of the collimation system by connecting a water cooling module, thereby solving the thermal effect problem caused by high-power lasers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the adjustable focus high-power laser alignment system of the present invention;

[0024] Figure 2 is a cross-sectional view of a fixed bracket;

[0025] Figure 3 is a cross-sectional view of the collimating bracket;

[0026] Figure 4 The spot morphology of the high-power laser before (a) and after (b) collimation by the collimation system;

[0027] Figure markings: 1- optical fiber connector standard adapter, 2- sealing bracket, 3- transition bracket, 4- moving cylinder, 5- fixed bracket, 51- threaded hole, 6- threaded adjustment ring, 7- sliding pad, 8- collimating bracket, 81- cooling water channel, 9- collimating lens, 10- collimating pressure ring, 11- sealing bracket water-cooling joint, 12- moving cylinder water-cooling joint, 13- collimating bracket water-cooling joint, 14- gasket. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] Example

[0030] like Figure 1 As shown, this embodiment provides a focus-adjustable high-power laser alignment system, which includes a standard adapter 1 for an optical fiber connector, a sealing bracket 2, a transition bracket 3, a moving tube 4, a fixed bracket 5, a threaded adjustment ring 6, a collimation bracket 8 and a collimation lens 9; the standard adapter 1 for an optical fiber connector is connected to the sealing bracket 2, the sealing bracket 2 cooperates with the transition bracket 3 and is fixed together by bolts, and the whole is coaxially matched with the moving tube 4; the collimation lens 9 is installed on the collimation bracket 8 and is fixed on the fixed bracket 5 as a whole; the threaded adjustment ring 6 and the collimation bracket 8 are installed by threaded matching; the fixed bracket 5 and the collimation bracket 8 are threadedly connected (the threaded hole 51 is as shown in FIG. Figure 2As shown), both have a rotation limiting function, and the rotating threaded adjustment ring 6 controls the linear movement of the collimating bracket 8 to achieve continuous adjustment of the collimating lens 9 to the optical fiber position; the high-power laser is connected to the laser collimation system through the optical fiber connector standard adapter 1 and output through the collimating lens 9.

[0031] The collimating lens 9 is mounted on the collimating bracket 8 , and the lens is pressed by a fixed pressing ring 10 and a gasket 14 .

[0032] Sliding pads 7 are installed in the fixed bracket 5 and the collimating bracket 8 to prevent the threaded adjustment ring 6 from getting stuck when rotating to adjust the focal length. The sliding pads 7 are generally made of lubricating materials such as polytetrafluoroethylene.

[0033] As another preferred solution, the laser alignment system in this embodiment further includes a water cooling module, as follows:

[0034] The water cooling module connects the cooling water to the cooling water channel provided in the collimating bracket 8 through the collimating bracket water cooling joint 13 to cool the collimating lens 9. Figure 3 As shown, there is a cooling water channel 81 to cool the lens, control the temperature rise of the lens 9, and prevent the high-power laser from causing thermal effects on the lens.

[0035] And / or, the water cooling module connects the cooling water to the cooling water channel provided in the moving cylinder 4 through the moving cylinder water cooling joint 12 to cool the moving cylinder 4. That is, the moving cylinder 4 has the functions of water cooling and blocking stray light to prevent the danger of high-power laser scattering.

[0036] And / or, the water cooling module connects the cooling water to the cooling water channel provided in the sealing bracket 2 through the sealing bracket water cooling joint 11 for water cooling.

[0037] The water cooling joint includes a water cooling joint input end and a water cooling joint output end. The cooling water output by the external water cooling system is connected through the water cooling joint input end and input back to the external water cooling system through the water cooling joint output end to form a cooling loop.

[0038] like Figure 4 The spot morphology image reflects the good collimation effect of the collimation system for high-power lasers. The spot morphology is divergent before collimation, and after collimation, it is a Gaussian spot with good spot morphology in the far field.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A focus-adjustable high-power laser alignment system, characterized in that: The laser collimation system comprises a standard optical fiber joint adapter (1), a sealing bracket (2), a transition bracket (3), a moving cylinder (4), a fixed bracket (5), a threaded adjustment ring (6), a collimation bracket (8) and a collimation lens (9); The optical fiber connector standard adapter (1) is connected to the sealing bracket (2), and the sealing bracket (2) and the transition bracket (3) are matched and fixed together, and the whole is coaxially matched with the moving cylinder (4); the collimating lens (9) is installed on the collimating bracket (8) and is fixed on the fixed bracket (5) as a whole; the threaded adjustment ring (6) and the collimating bracket (8) are installed by threaded matching; the fixed bracket (5) and the collimating bracket (8) are threadedly connected, and both have a rotation limiting function, and the rotating threaded adjustment ring (6) controls the linear movement of the collimating bracket (8) to realize continuous adjustment of the collimating lens (9) to the optical fiber position; The high-power laser is connected to the laser collimation system via a standard optical fiber connector adapter (1) and outputted via a collimating lens (9); The laser alignment system also includes a water cooling module; the water cooling module connects cooling water to a cooling water channel provided in the collimating bracket (8) through a collimating bracket water cooling joint (13) to cool the collimating lens (9); the water cooling module connects cooling water to a cooling water channel provided in the moving barrel (4) through a moving barrel water cooling joint (12) to cool the moving barrel (4); the water cooling module connects cooling water to a cooling water channel provided in the sealing bracket (2) through a sealing bracket water cooling joint (11) to perform water cooling.

2. The focus-adjustable high-power laser alignment system according to claim 1, characterized in that: The sealing bracket (2) and the transition bracket (3) are fixed together by bolts.

3. The focus-adjustable high-power laser alignment system according to claim 1, characterized in that: The collimating lens (9) is mounted on a collimating bracket (8), and the lens is pressed tightly by a fixed pressing ring (10) and a gasket (14).

4. The adjustable focus high-power laser alignment system according to claim 1 is characterized in that: Sliding pads (7) are installed inside the fixed bracket (5) and the collimating bracket (8) to prevent the threaded adjustment ring (6) from getting stuck when rotating to adjust the focal length.

5. The focus-adjustable high-power laser alignment system according to claim 4, characterized in that: The sliding pad (7) is made of polytetrafluoroethylene.

6. The focus-adjustable high-power laser alignment system according to claim 1, characterized in that: The water cooling joint comprises a water cooling joint input end and a water cooling joint output end. The cooling water output by the external water cooling system is connected via the water cooling joint input end and input back into the external water cooling system via the water cooling joint output end to form a cooling loop.

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