Lens and lens group for adjusting rectangular light spots

Abstract

The utility model discloses a lens and a lens group used for adjusting rectangular light spots, comprising at least two linear light spot lens groups, each linear light spot lens group comprises two mutually superposed lenses; a plurality of parallel cylindrical structures are designed on the surface of the lens to form a sub-lens; the two linear light spot lens sets are overlapped and are arranged in a 90-degree crossed mode to form a rectangular light spot lens set capable of being independently adjusted in the X direction and the Y direction, the problems that in the prior art, a rectangular light spot lens is not adjustable, large in size, tedious to replace and the like can be solved, the lens and the lens set are flexibly adjusted, frequent disassembly and assembly of the lens are not needed, and the multi-scene dynamic light spot requirement is met.

Description

Technical Field

[0001] The utility model relates to the field of optics, in particular to a lens and a lens assembly for an adjustable rectangular light spot. Background Art

[0002] In the laser industry, rectangular light spots, as a flat-top light with a uniform beam, are widely used in laser lighting, laser medical treatment, 3D imaging, laser processing, and other fields. Currently, existing technologies mainly use reflective integrators or DOE diffractive optical elements to achieve rectangular light spots, but these have the following drawbacks:

[0003] Reflective integrator: It is large in size, with a fixed spot size and shape that cannot be adjusted, making it difficult to adapt to diverse application requirements.

[0004] DOE lens: low light efficiency, severe heat generation when used at high power, and the light spot is also fixed.

[0005] Common defects: In automated production processes that require diversified light spots, such as laser furniture edge sealing, chip welding, metal quenching, etc., lenses need to be frequently replaced to adjust the light spots. The replacement process is cumbersome, and high-energy optical components have high environmental requirements, high operating costs, and low efficiency.

[0006] Therefore, the existing optical field needs to be further improved. Utility Model Content

[0007] The purpose of this utility model is to provide a lens and lens assembly for an adjustable rectangular light spot, which can solve the problems of rectangular light spot lenses in the existing technology, such as "non-adjustability, large size, and cumbersome replacement". The flexibly adjustable lens and lens assembly do not require frequent disassembly and assembly of the lenses, and can meet the dynamic light spot requirements of multiple scenes.

[0008] In order to achieve the above purpose, the present invention adopts the following scheme:

[0009] A lens and lens assembly for an adjustable rectangular light spot, comprising at least two linear light spot lens assemblies, each of which comprises two superimposed lenses; the lens surface is designed with multiple parallel cylindrical structures to form sub-lenses;

[0010] The two linear spot mirror groups are superimposed and arranged at a 90-degree angle to form a rectangular spot mirror group that can be independently adjusted in the X and Y directions;

[0011] It also includes a base, on which is provided a moving component connected to one of the lenses, on which is provided a transmission gear component and an adjustment component, on which is provided a screw control component for adjusting the position of the moving component, and on which is provided a transmission gear component connected to the screw control component and the adjustment component.

[0012] Furthermore, the lens is made of high-transmittance glass or fused quartz.

[0013] Furthermore, the surface of the lens is coated with an antireflection film.

[0014] Furthermore, the moving assembly includes a linear guide groove provided on the base, and an adjusting slider is movably provided in the linear guide groove.

[0015] Furthermore, one of the lenses is fixed on the base, and the other lens is installed on the adjusting slider.

[0016] Furthermore, the adjustment component includes an adjustment knob arranged on the base, a scale is provided around the circumferential outer wall of the adjustment knob, the scale is fixedly provided on the surface of the base, and a pointer is provided on the circumferential outer wall of the adjustment knob.

[0017] Furthermore, the screw control assembly includes a rotating screw arranged in the linear guide groove, and the adjusting slider is provided with an adjusting screw hole. The rotating screw is inserted into the adjusting screw hole and is threadedly connected to the adjusting screw hole.

[0018] Furthermore, the transmission gear assembly includes a first transmission gear provided at the end of the rotating screw, and a second transmission gear is provided on the adjusting knob, and the first transmission gear and the second transmission gear are engaged for transmission. In summary, the present invention has the following beneficial effects compared with the prior art:

[0019] This utility model solves the shortcomings existing in the existing optical field. Through the structural setting of this utility model, it has the following advantages: by adjusting the lens spacing through the mechanical structure, the length, width and aspect ratio of the rectangular light spot can be independently controlled, which is suitable for the dynamic light spot requirements of multiple scenes such as laser furniture edge sealing and chip welding, without the need to replace the lens; the adjustment knob is combined with the scale to achieve precise adjustment, and supports manual or digital control such as motor-driven knobs, which reduces the difficulty of operation and improves production efficiency. Based on the design of cylindrical sub-lenses and orthogonal lens groups, it is smaller in size than traditional reflective integrators, and the lenses are made of high-transmittance materials, which improves light transmittance and reduces energy loss. It is suitable for industrial environments and has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the lens of the present invention;

[0021] Figure 2 This is a right side view of the lens of the present invention;

[0022] Figure 3 for Figure 2 A local enlarged view of point A;

[0023] Figure 4 This is a three-dimensional diagram of the spacing adjustment device of the present utility model;

[0024] Figure 5 This is one of the cross-sectional views of the distance adjustment device of the present utility model;

[0025] Figure 6 This is the second cross-sectional view of the distance adjustment device of the present utility model. DETAILED DESCRIPTION

[0026] 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 embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1-6 The present invention provides a lens and lens assembly for an adjustable rectangular light spot, comprising at least two linear light spot lens assemblies, each of which comprises two lenses 2 superimposed on each other; the surface of the lens 2 is designed with a plurality of parallel cylindrical structures to form a sub-lens;

[0028] The two linear spot mirror groups are superimposed and arranged at a 90-degree angle to form a rectangular spot mirror group that can be independently adjusted in the X and Y directions;

[0029] The lens assembly 3 further comprises a base 3, on which is provided a moving assembly 4 connected to one of the lenses 2, a transmission gear assembly 5 and an adjustment assembly, and a screw control assembly 7 for adjusting the position of the moving assembly 4. The transmission gear assembly 5 is connected to the screw control assembly 7 and the adjustment assembly. After the collimated laser is incident, the sub-lens splits the light beam and refracts it to form a line spot. After the two line spot lens groups are orthogonally superimposed, the screw control assembly 7 and the transmission gear assembly 5 on the base drive the moving assembly 4 to adjust the spacing between the lenses 2, thereby achieving independent control of the spot size in the X and Y directions, and ultimately forming an adjustable rectangular spot.

[0030] Working principle of lens and line spot lens assembly

[0031] The lens 2 is made of high-transmittance glass or fused quartz, and the surface is designed with a parallel cylindrical structure to form a sub-lens. The pitch of the sub-lens is 0.5-2mm, and the curvature radius R is 2-10. Each line spot lens group is composed of two superimposed lenses 2.

[0032] Principle: When a collimated laser is incident on lens 2, the sub-cylindrical lens splits the incident light and causes it to diverge in a single direction, forming a straight line spot in the far field and another line spot at a 90° angle to the sub-cylindrical lens. Adjusting the spacing between the two lenses 2 in the same line spot lens group can change the width of the line spot.

[0033] Working principle of rectangular spot lens group

[0034] Structural composition: Two line spot lens groups are superimposed and cross-set at 90 degrees, combined with a focusing lens group.

[0035] Principle: Two orthogonal line spot mirror groups control the spot size in the X and Y directions respectively to form a rectangular spot. By adjusting the lens spacing of the two line spot mirror groups, the length, width and aspect ratio of the rectangular spot can be independently controlled. In conjunction with the focusing lens group, a uniform and adjustable rectangular spot is formed on the working plane of 50-100mm.

[0036] The lens 2 of the present invention is made of high-transmittance glass or fused quartz.

[0037] The surface of the lens 2 described in the present invention is coated with an anti-reflection film; the high-transmittance material has the characteristics of low absorption and high transmittance with a transmittance of >92%, which can reduce laser energy loss. At the same time, it is resistant to high temperatures and has strong chemical stability, ensuring the uniformity of the light spot and the service life of the lens in high-energy laser scenes; the anti-reflection film reduces the reflectivity of the lens surface through the interference effect, reduces the reflected light, further improves the laser transmittance, avoids the light spot energy distortion caused by reflected light, and ensures the energy uniformity of the rectangular light spot is >90%.

[0038] The movable assembly 4 of the present invention includes a linear guide groove 401 provided on the base 3 , and an adjusting slider 402 is movably provided in the linear guide groove 401 .

[0039] In the present invention, one of the lenses 2 is fixedly mounted on the base 3 , and the other lens 2 is mounted on the adjusting slider 402 ;

[0040] One lens 2 is fixed to the base 3 , and the other lens 2 is mounted on the adjusting slider 402 ; when the adjusting slider 402 slides in the linear guide groove 401 , the distance between the two lenses 2 is changed, thereby adjusting the width of the linear spot.

[0041] The adjustment assembly of the present invention includes an adjustment knob 601 arranged on the base 3, a scale 602 is arranged around the outer wall of the adjustment knob 601, the scale 602 is fixedly arranged on the surface of the base 3, and a pointer 603 is arranged on the outer wall of the adjustment knob 601.

[0042] The screw control assembly 7 of the present invention includes a rotating screw 701 disposed in the linear guide groove 401, and an adjusting screw hole 702 is provided on the adjusting slider 402. The rotating screw 701 is inserted into the adjusting screw hole 702 and is threadedly connected to the adjusting screw hole 702; the rotating screw 701 penetrates the adjusting screw hole 702 of the adjusting slider 402 and is threadedly connected; when the rotating screw 701 rotates, the adjusting slider 402 is driven to move along the linear guide groove 401 through thread transmission, thereby achieving precise adjustment of the distance between the lenses 2;

[0043] The fixed lens and the movable lens form a combination with an adjustable distance. When the adjustment slider 402 moves, the distance between the two lenses 2 changes, thereby adjusting the divergence angle of the linear light spot and realizing dynamic adjustment of the light spot width.

[0044] The first transmission gear 501 at the end of the rotating screw 701 is engaged with the second transmission gear 502 of the adjusting knob 601 ; when the adjusting knob 601 is rotated, the rotating screw 701 is driven to rotate through the gear transmission, converting the rotational motion into the linear motion of the adjusting slider 402 .

[0045] The transmission gear assembly 5 of the present invention includes a first transmission gear 501 provided at the end of the rotating screw 701 , and a second transmission gear 502 is provided on the adjusting knob 601 . The first transmission gear 501 and the second transmission gear 502 are engaged for transmission.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A lens and lens assembly for an adjustable rectangular light spot, comprising at least two linear light spot lens assemblies, each of the linear light spot lens assemblies comprising two lenses (2) superimposed on each other; the surface of the lens (2) is designed with a plurality of parallel cylindrical structures to form sub-lenses; characterized in that: The two linear spot mirror groups are superimposed and arranged at a 90-degree angle to form a rectangular spot mirror group that can be independently adjusted in the X and Y directions; The invention also includes a base (3), wherein a moving assembly (4) connected to one of the lenses (2) is provided on the base (3), a transmission gear assembly (5) and an adjustment assembly are provided on the base (3), a screw control assembly (7) for adjusting the position of the moving assembly (4) is provided on the base (3), and the transmission gear assembly (5) is connected to the screw control assembly (7) and the adjustment assembly.

2. The lens and lens assembly for an adjustable rectangular light spot according to claim 1, characterized in that: The lens (2) is made of high-transmittance glass or fused quartz.

3. The lens and lens assembly for an adjustable rectangular light spot according to claim 1, characterized in that: The surface of the lens (2) is coated with an antireflection film.

4. The lens and lens assembly for an adjustable rectangular light spot according to claim 1, characterized in that: The moving assembly (4) comprises a linear guide groove (401) provided on the base (3), and an adjusting slider (402) is movably provided in the linear guide groove (401).

5. The lens and lens assembly for an adjustable rectangular light spot according to claim 4, characterized in that: One of the lenses (2) is fixedly mounted on the base (3), and the other lens (2) is mounted on the adjustment slider (402).

6. The lens and lens assembly for an adjustable rectangular light spot according to claim 5, characterized in that: The adjustment component comprises an adjustment knob (601) arranged on the base (3), a scale (602) is arranged around the circumferential outer wall of the adjustment knob (601), the scale (602) is fixedly arranged on the surface of the base (3), and a pointer (603) is arranged on the circumferential outer wall of the adjustment knob (601).

7. The lens and lens assembly for an adjustable rectangular light spot according to claim 6, characterized in that: The screw control assembly (7) includes a rotating screw (701) arranged in the linear guide groove (401), an adjusting screw hole (702) is provided on the adjusting slider (402), and the rotating screw (701) is inserted into the adjusting screw hole (702) and is threadedly connected to the adjusting screw hole (702).

8. The lens and lens assembly for an adjustable rectangular light spot according to claim 7, characterized in that: The transmission gear assembly (5) comprises a first transmission gear (501) arranged at the end of the rotating screw (701), a second transmission gear (502) is arranged on the adjusting knob (601), and the first transmission gear (501) and the second transmission gear (502) are meshed for transmission.

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