Light beam adjusting part and laser equipment

Abstract

The utility model provides a light beam adjusting part and laser equipment, the light beam adjusting part is used for the laser equipment, the laser equipment comprises a light source and a focus lens, light beams generated by the light source can be emitted out of the laser equipment through the focus lens, the light beam adjusting part comprises a light expanding lens and a condensing lens, and the light expanding lens is arranged between the light source and the focus lens in the light beam direction. Light spots are expanded after the light beams pass through the light expanding lens; the condensing lens is arranged between the light expanding lens and the focusing lens in the light beam direction, light spots are reduced after light beams pass through the condensing lens, and the distance between the light expanding lens and the condensing lens in the light beam direction can be adjusted. Through the combination of the light expanding lens and the light condensing lens and the adjustability of the distance between the light expanding lens and the light condensing lens, the light spot size of the light beam can be flexibly adjusted, preliminary modulation of the light beam characteristics is achieved, and the diversified requirements for the light spot size in different application scenes are met. The problems that in traditional laser equipment, the light spot size is difficult to adjust flexibly and cannot be rapidly adjusted according to different application scenes to meet requirements are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser beam adjustment, and more particularly relates to a light beam adjustment piece and a laser device. BACKGROUND

[0002] The semiconductor laser is also called a laser diode. Through certain excitation modes such as electric injection, electron beam excitation and optical pumping, particle number inversion of non-equilibrium carriers between energy bands or between energy bands and impurity energy levels of a semiconductor substance is realized. When a large number of electrons and holes in the particle number inversion state recombine, stimulated emission occurs, and thus laser is emitted.

[0003] The light beam quality of the output spot of the semiconductor laser disclosed in the related art is generally determined by a lens. When it is required to adjust the light beam quality of the output spot according to requirements of different application scenarios, the adjustment cannot be directly and flexibly performed. If the light beam quality is to be changed, the optical material of the product must be changed, such as replacing lenses of different types, and after the material is changed, the expected light beam quality adjustment can be achieved only by debugging through a specific process. The whole process is complex, not flexible and convenient, and it is difficult to quickly respond to diversified requirements for the light beam quality in different application scenarios.

[0004] Therefore, how to flexibly change the light beam quality of the output spot needs to be solved. CONTENT OF THE INVENTION

[0005] The application provides a light beam adjustment piece capable of flexibly changing the light beam quality of the output spot.

[0006] The technical scheme adopted by the application is as follows: a light beam adjustment piece for a laser device is provided, the laser device comprises a light source and a focusing mirror, a light beam generated by the light source can be emitted out of the laser device through the focusing mirror, the light beam adjustment piece comprises a light expanding lens and a light condensing lens, the light expanding lens is arranged between the light source and the focusing mirror along a light beam direction, and the light beam is expanded after passing through the light expanding lens; the light condensing lens is arranged between the light expanding lens and the focusing mirror along the light beam direction, the light beam is contracted after passing through the light condensing lens, and the distance between the light expanding lens and the light condensing lens along the light beam direction is adjustable.

[0007] Further, the light entrance surface of the light expanding lens is a plane, the light exit surface of the light condensing lens is a plane, and the light entrance surface of the light expanding lens is parallel to the light exit surface of the light condensing lens.

[0008] Further, the light entrance surface of the light expanding lens is perpendicular to the light beam direction of the light expanding lens.

[0009] Further, the light expanding lens is a concave lens, and the light condensing lens is a convex lens.

[0010] Further, the curvature of the concave mirror surface of the light expanding lens is equal to the curvature of the convex mirror surface of the light collecting lens.

[0011] Further, the width of the concave mirror surface of the light expanding lens is equal to the width of the convex mirror surface of the light collecting lens, and can be completely attached.

[0012] Further, the concave mirror surface of the light expanding lens and the convex mirror surface of the light collecting lens are both set as prism surfaces.

[0013] Further, the light expanding lens and the light collecting lens are both center-symmetric structures.

[0014] The application also provides a laser device, which comprises a shell and the light beam adjusting piece as described above, the light source, the focusing mirror and the light beam adjusting piece are all arranged in the shell, the shell is provided with an outlet, and the light beam generated by the light source is emitted from the outlet through the light expanding lens, the light collecting lens and the focusing mirror of the light beam adjusting piece in sequence.

[0015] Further, the laser device further comprises a fast-axis collimating mirror, a slow-axis collimating mirror and a mirror, and the fast-axis collimating mirror, the slow-axis collimating mirror and the mirror are arranged between the light source and the light expanding lens in sequence along the light beam direction.

[0016] The light beam adjusting piece provided by the application is used in a laser device, the laser device comprises a light source and a focusing mirror, the light beam adjusting piece comprises a light expanding lens and a light collecting lens, and is arranged between the light source and the focusing mirror in sequence along the light beam direction, the light expanding lens expands the light spot, the light collecting lens shrinks the light spot, and the distance between the light expanding lens and the light collecting lens is adjustable. The light source emits a light beam, which first passes through the light expanding lens, is expanded due to the characteristics of the light expanding lens, and then passes through the light collecting lens, which shrinks the light spot by using its characteristics, and the adjustable distance can change the propagation state of the light beam between the two lenses, i.e. adjusting the distance between the light expanding lens and the light collecting lens to increase the distance can expand the size of the light spot of the light beam passing through the light beam adjusting piece, and vice versa, adjusting the distance between the light expanding lens and the light collecting lens to decrease the distance can shrink the size of the light spot of the light beam passing through the light beam adjusting piece.

[0017] Through the combination of the light expanding lens and the light collecting lens and the adjustability of the distance between the light expanding lens and the light collecting lens, the size of the light spot of the light beam can be flexibly adjusted, the characteristics of the light beam can be preliminarily modulated, and the diversified requirements for the size of the light spot in different application scenarios can be met. The problem that the size of the light spot in the traditional laser device is difficult to flexibly adjust and cannot be quickly adjusted according to different application scenarios to meet the requirements is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 The structural schematic diagram of the laser device provided by the embodiments of the present application is shown in the figure.

[0020] Figure 2 The structural schematic diagram of the light beam adjusting member provided by the embodiments of the present application is shown in the figure.

[0021] In the figure, various reference signs are as follows:

[0022] 10, light beam adjusting member; 11, light expanding lens; 12, light converging lens; 20, laser device; 21, light source; 22, focusing mirror; 23, shell; 24, fast axis collimating mirror; 25, slow axis collimating mirror; 26, reflecting mirror. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] Please refer to Figure 1 and Figure 2The light beam adjusting member 10 provided by the embodiment of the present application is described as follows. The light beam adjusting member 10 provided by the embodiment of the present application is used in a laser device 20, the laser device 20 includes a light source 21 and a focusing mirror 22, a light beam generated by the light source 21 can be emitted out of the laser device 20 through the focusing mirror 22, the light beam adjusting member 10 includes a light expanding lens 11 and a light condensing lens 12, the light expanding lens 11 is arranged between the light source 21 and the focusing mirror 22 along a direction of the light beam, and the light beam is expanded after passing through the light expanding lens 11; the light condensing lens 12 is arranged between the light expanding lens 11 and the focusing mirror 22 along the direction of the light beam, and the light beam is contracted after passing through the light condensing lens 12, and the distance between the light expanding lens 11 and the light condensing lens 12 is adjustable.

[0027] The light beam adjusting member 10 provided by the embodiment of the present application is used in a laser device 20, the laser device 20 includes a light source 21 and a focusing mirror 22, a light beam adjusting member 10 includes a light expanding lens 11 and a light condensing lens 12, and the light expanding lens 11 and the light condensing lens 12 are arranged between the light source 21 and the focusing mirror 22 along a direction of the light beam in sequence, the light expanding lens 11 expands a light spot, the light condensing lens 12 contracts the light spot, and the distance between the light expanding lens 11 and the light condensing lens 12 is adjustable. The light source 21 emits a light beam, the light beam first passes through the light expanding lens 11, the light spot is expanded due to the characteristics of the light expanding lens 11, then the light beam passes through the light condensing lens 12, the light spot is contracted by using the characteristics of the light condensing lens 12, and the distance between the light expanding lens 11 and the light condensing lens 12 is adjustable, so that the propagation state of the light beam between the two lenses can be changed, that is, the distance between the light expanding lens 11 and the light condensing lens 12 is increased, so that the size of the light spot of the light beam passing through the light beam adjusting member 10 is expanded, and vice versa, the distance between the light expanding lens 11 and the light condensing lens 12 is reduced, so that the size of the light spot of the light beam passing through the light beam adjusting member 10 is contracted.

[0028] Through the combination of the light expanding lens 11 and the light condensing lens 12 and the adjustability of the distance between the light expanding lens 11 and the light condensing lens 12, the size of the light spot of the light beam can be flexibly adjusted, the preliminary modulation of the characteristics of the light beam is realized, and the diversified requirements for the size of the light spot in different application scenarios are met. The problem that the size of the light spot in the traditional laser device 20 is difficult to flexibly adjust and cannot be quickly adjusted according to different application scenarios to meet the requirements is solved.

[0029] The distance adjustment between the light expanding lens 11 and the light condensing lens 12 can be realized by moving any one of them, and of course both of them can be moved and adjusted.

[0030] Further, the light entrance surface of the light expanding lens 11 is a plane, the light exit surface of the light condensing lens 12 is also a plane, and the light entrance surface of the light expanding lens 11 is parallel to the light exit surface of the light condensing lens 12.

[0031] The light-incident surface and the light-emitting surface are flat, which can make the refraction of light more regular when the light enters and exits the lens. The parallel arrangement ensures the stability of the light beam when it propagates between the two lenses, reduces the light beam interference caused by the problems such as light beam deviation and distortion due to the non-parallel interface, improves the accuracy and reliability of the light beam adjustment, and helps to more accurately control the spot size and light beam quality.

[0032] Further, the light-incident surface of the light-expanding lens 11 in the above embodiment is taken as an example, which is perpendicular to the direction of the light beam entering the light-expanding lens 11.

[0033] This arrangement ensures that the light beam is perpendicular to the light-expanding lens 11. According to the law of refraction, the propagation direction of the light beam does not change when the light is perpendicular to the incident, which can make the light beam enter the light-expanding lens 11 uniformly and avoid problems such as light beam asymmetry and uneven energy distribution caused by oblique incidence. Further, it ensures the adjustment effect of the light-converging lens 12 on the light beam and improves the stability and consistency of the entire light beam adjustment process.

[0034] Further, the light-expanding lens 11 in the above embodiment is a concave lens, and the light-converging lens 12 is a convex lens.

[0035] The concave lens has a diverging effect on light, which can expand the cross-section of the light beam and achieve spot expansion. The convex lens has a converging effect on light, which can re-converge the diverging light beam and achieve spot reduction. The structure is simple and the adjustment principle is clear, which can meet the demand for preliminary modulation of the light beam. The combination of the two characteristics can achieve the adjustment of the size of the light beam spot.

[0036] Further, in the above embodiment, the curvature of the concave mirror surface of the light-expanding lens 11 is equal to the curvature of the convex mirror surface of the light-converging lens 12.

[0037] The equal curvature means that the degree of action of the two lenses on light is matched to some extent. In the process of first diverging the light beam by the concave lens and then converging the light beam by the convex lens, the degree of divergence and convergence of the light beam can be better controlled, the adjustment of the light beam is more accurate and predictable, and it is beneficial to achieve more stable light beam quality.

[0038] Specifically, the curvature of the concave mirror surface of the light-expanding lens 11 in the above embodiment is equal to the curvature of the convex mirror surface of the light-converging lens 12, and the two lenses can be completely attached.

[0039] The equal curvature ensures that the action area of the light beam on the two lenses is consistent, avoiding the problem of inconsistent adjustment of the edge of the light beam due to different action areas. The completely attachable shape can reduce the energy loss and scattering of the light beam when it propagates between the two lenses to some extent, and also facilitates the installation and adjustment of the two lenses in practical applications, which is beneficial to improve the performance and reliability of the entire laser device 20.

[0040] In an embodiment, the concave mirror surface of the light expanding lens 11 and the convex mirror surface of the light converging lens 12 can also be prismatic surfaces.

[0041] The prismatic surface can cause more angle changes and dispersion effects in the refraction process, increase the adjustment dimension of the light beam, not only adjust the spot size, but also make more precise adjustments to the angle distribution, energy distribution and other characteristics of the light beam, and meet the needs of some high-precision light beam adjustment in some application scenarios such as laser processing and laser communication.

[0042] Further, the light expanding lens 11 and the light converging lens 12 in any of the above embodiments are center-symmetric structures.

[0043] The center-symmetric structure ensures that the optical characteristics in all directions are consistent when the light beam passes through the lens, avoids the problem that the adjustment effects of the light beam in different directions are inconsistent due to the asymmetric structure of the lens, makes the adjustment of the light beam more uniform and stable, is conducive to obtaining high-quality and symmetrical light beam output, and meets the requirements of the application scenarios that require symmetrical light beams.

[0044] Please refer to Figure 1 The embodiment of the present application also provides a laser device 20, which comprises a shell 23 and the light beam adjusting part 10 in any of the above embodiments, a light source 21 and a focusing mirror 22, and the light beam adjusting part 10, the light source 21 and the focusing mirror 22 are arranged in the shell 23, the shell 23 is provided with an outlet, and the light beam generated by the light source 21 is emitted from the outlet of the laser device 20 through the light expanding lens 11, the light converging lens 12 and the focusing mirror 22 of the light beam adjusting part 10 in sequence.

[0045] The shell 23 protects and fixes the internal components, ensures the stability of the relative positions of the components, makes the light beam pass through the optical elements in sequence according to the predetermined path for adjustment and emission, realizes the modulation and output functions of the laser device 20 on the light beam, and meets the actual application requirements.

[0046] The laser device 20 of the embodiment of the present application comprises the light beam adjusting part 10 in any of the above embodiments, so it has the beneficial effects brought by the light beam adjusting part 10 in any of the above embodiments, which will not be repeated here.

[0047] Further, the laser device 20 of the above embodiment further comprises a fast-axis collimating mirror 24, a slow-axis collimating mirror 25 and a reflecting mirror 26, which are arranged between the light source 21 and the light expanding lens 11 in sequence along the direction of the light beam.

[0048] The fast-axis collimating mirror 24 and the slow-axis collimating mirror 25 collimate the laser emitted by the light source 21 in the fast-axis and slow-axis directions respectively, to improve the parallelism of the light beam; the mirror 26 changes the propagation direction of the light beam, so that the light beam can be reasonably propagated inside the device to reach the subsequent light-expanding lens 11 and other components. Through the arrangement of the fast-axis collimating mirror 24, the slow-axis collimating mirror 25 and the mirror 26, the light beam emitted by the light source 21 is preprocessed to improve the parallelism of the light beam and reasonably layout the light path, to provide better basic conditions for the further adjustment of the light beam by the subsequent light beam adjusting member 10, thereby improving the quality and performance of the output light beam of the entire laser device 20.

[0049] It should be noted that the light beam adjusting member 10 in the embodiments of the present application can also be used in other light paths, and is applicable.

[0050] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A beam adjustment device for a laser apparatus, the laser apparatus comprising a light source and a focusing lens, wherein a beam generated by the light source can exit the laser apparatus through the focusing lens, characterized in that, The beam adjustment component includes: A beam-expanding lens is disposed between the light source and the focusing lens along the direction of the light beam, thereby enlarging the light spot after the light beam passes through the beam-expanding lens; and A condensing lens is disposed between the expanding lens and the focusing lens along the direction of the light beam. The light beam is reduced in size after passing through the condensing lens, and the distance between the expanding lens and the condensing lens along the direction of the light beam is adjustable.

2. The beam adjustment component according to claim 1, characterized in that, The light-inlet surface of the light-expanding lens is a plane, the light-outlet surface of the light-condensing lens is a plane, and the light-inlet surface of the light-expanding lens is parallel to the light-outlet surface of the light-condensing lens.

3. The beam adjustment component according to claim 2, characterized in that, The light-incident surface of the light-expanding lens is perpendicular to the direction of the light beam incident on the light-expanding lens.

4. The beam adjustment element according to claim 2, characterized in that, The light-expanding lens is a concave lens, and the light-condensing lens is a convex lens.

5. The beam adjustment element according to claim 4, characterized in that, The curvature of the concave surface of the expanding lens is equal to the curvature of the convex surface of the concentrating lens.

6. The beam adjustment member according to claim 5, characterized in that, The concave surface of the expanding lens is equal in size to the convex surface of the concentrating lens, and they can fit together perfectly.

7. The beam adjustment member according to claim 4, characterized in that, Both the concave surface of the light-expanding lens and the convex surface of the light-condensing lens are configured as prism surfaces.

8. The beam adjustment member according to any one of claims 1-7, characterized in that, Both the expanding lens and the concentrating lens have a centrally symmetrical structure.

9. A laser device, characterized in that, The laser device includes a housing and a beam adjustment component as described in any one of claims 1-8. The light source, the focusing lens, and the beam adjustment component are all disposed within the housing. The housing has a light outlet. The light beam generated by the light source passes sequentially through the beam expanding lens, the beam converging lens, and the focusing lens of the beam adjustment component and exits the laser device from the light outlet.

10. The laser device according to claim 9, characterized in that, The laser device further includes a fast-axis collimating lens, a slow-axis collimating lens, and a reflector, which are sequentially arranged between the light source and the beam amplifying lens along the beam direction.

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