Multi-wavelength high-power field lens
By using a flat window mirror with detachable adjustment components and magnet connections in multi-wavelength high-power field mirrors, the problem that laser beams at different wavelengths cannot be cofocused is solved, and high-precision and efficient laser processing are achieved, reducing production costs.
Patent Information
- Application Number
- CN202510555543.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-07-08
AI Technical Summary
In the existing multi-wavelength high-power field mirror design, high-ABE optical materials are expensive and easy to scratch, the gradient refractive index lens has a narrow spectrum and insufficient compatibility with multi-wavelength lasers, resulting in laser beams at different wavelengths being unable to focus on the same focal plane, affecting processing accuracy and efficiency.
The flat window mirror connected by a detachable adjustment assembly and a magnet is used to combine high ABB number and gradient refractive index lens materials, and the adjustment assembly and magnets enable rapid replacement and adjustment of different flat window mirrors, ensuring that the laser beams at different wavelengths are focused on the same focal plane.
The focus consistency of laser beams of different wavelengths is achieved, which reduces the difficulty of hardware manufacturing, improves processing accuracy and efficiency, reduces production costs, and enhances the scope of application of equipment.
Smart Images
Figure CN120269134A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of laser processing equipment, and particularly to a multi-wavelength high-power field lens. Background Art
[0002] Multi-wavelength laser processing significantly improves processing efficiency, precision, and material adaptability by combining lasers of different wavelengths to work together, and is particularly suitable for the manufacturing of complex materials, multi-layer structures, and precision devices. However, in the application of conventional technologies, when laser beams of different wavelengths are focused by the same lens, the best focus spots of lasers with different wavelengths will not be on the same focal plane due to aberration phenomena. Especially in the application of field lens laser processing, there will be differences in the processing area, processing precision, and working distance of lasers with different wavelengths.
[0003] Currently, for the design of multi-wavelength high-power field lenses, optical systems are generally designed using optical materials with a high Abbe number (high V value), such as fluoride crystals (calcium fluoride, magnesium fluoride), or materials with a gradient refractive index (GRIN) lens that can withstand a high damage threshold; however, optical materials with a high Abbe number have problems such as high cost and easy scratching, and gradient refractive index lenses have problems such as a narrow spectrum and insufficient compatibility with multi-wavelength lasers.
[0004] In view of this, the present application proposes a multi-wavelength high-power field lens with an easily replaceable and switchable optical lens group. Summary of the Invention
[0005] To overcome the above-mentioned drawbacks, the purpose of the present invention is to provide a multi-wavelength high-power field lens.
[0006] To achieve the above object, the technical solution adopted by the present invention includes: a field lens main body, the field lens main body having an incident port and an exit port, and an optical component being accommodated in the field lens main body; an adjustment mechanism having a first adjustment component provided at the incident port of the field lens main body and a second adjustment component provided at the exit port of the field lens, the first adjustment component being capable of selectively arranging a first flat window mirror at the incident port of the field lens main body, and the second adjustment component being capable of selectively arranging a second flat window mirror or a third flat window mirror at the exit port of the field lens main body.
[0007] In the preferred technical solution of the above multi-wavelength high-power field lens, the first adjustment component includes a first lens holder detachably provided at the incident port of the field lens main body, and the first flat window mirror is placed in the first lens holder; The second adjustment component includes a second lens holder detachably provided at the exit port of the field lens main body, and the second flat window mirror or the third flat window mirror is placed in the second lens holder.
[0008] In the above preferred technical solution of the multi-wavelength high-power field lens, the first adjustment component includes a drawer lens holder having a first hole position and a second hole position. The first flat window lens is configured within the first hole position or the second hole position. The drawer lens holder is provided directly above the incident port of the field lens body, and the drawer lens holder can be translated directly above the field lens body to align the first hole position or the second hole position with the incident port. The second adjustment component includes a rotating wheel lens holder having a third hole position, a fourth hole position, and a fifth hole position. The second flat window lens and the third flat window lens are configured within any two of the third hole position, the fourth hole position, and the fifth hole position. The third hole position, the fourth hole position, and the fifth hole position are evenly distributed around the central axis of the rotating wheel lens holder. The rotating wheel lens holder is provided directly below the exit port of the field lens body and can rotate so that the third hole position, the fourth hole position, and the fifth hole position can be placed directly below the exit port.
[0009] In the above preferred technical solution of the multi-wavelength high-power field lens, first magnets are installed on both the first lens holder and the second lens holder, and second magnets that are positionally adapted and magnetically attractive to the first magnets are installed at the incident port and the exit port of the field lens body.
[0010] In the above preferred technical solution of the multi-wavelength high-power field lens, flavonoid gaskets are arranged between the first flat window lens and the incident port of the field lens body, and between the second flat window lens or the third flat window lens and the exit port of the field lens body.
[0011] In the above preferred technical solution of the multi-wavelength high-power field lens, the rotation of the rotating wheel lens holder is controlled by a driving device.
[0012] In the above preferred technical solution of the multi-wavelength high-power field lens, the first flat window lens and the third flat window lens are made of high Abbe number optical materials.
[0013] In the above preferred technical solution of the multi-wavelength high-power field lens, the second flat window lens is made of a combination of a high Abbe number optical material and a gradient refractive index lens material.
[0014] In the above preferred technical solution of the multi-wavelength high-power field lens, a cooling cavity is formed in the field lens body, and the cooling cavity has a liquid inlet and a liquid outlet that penetrate the outer side surface of the field lens body.
[0015] In the above preferred technical solution of the multi-wavelength high-power field lens, the cooling cavity is one of an annular shape and a serpentine shape. Description of the Drawings
[0016] Figure 1 Is the front view of Embodiment 1; Figure 2 Cross-sectional view of the first embodiment; Figure 3 Schematic diagram of the drawer lens holder in the second embodiment; Figure 4 Connection diagram of the rotary lens holder and the driving device in the second embodiment; Figure 5 Front view of the second embodiment Figure 1 ; Figure 6 Front view of the second embodiment Figure 2 ; Figure 7 Simulation diagram of GR laser beams at different positions passing through the field lens body and focusing on the focal plane; Figure 8 Simulation diagram of NIR laser beams at different positions passing through the field lens body and focusing on the focal plane; In the figure: field lens body 1, incident port 11, exit port 12, cooling cavity 13, liquid inlet 14, liquid outlet 15, optical component 2, first adjustment component 31, first lens holder 311, drawer lens holder 312, first hole position 3121, second hole position 3122, second adjustment component 32, second lens holder 321, rotary lens holder 322, third hole position 3221, fourth hole position 3222, fifth hole position 3223, first flat window mirror 41, second flat window mirror 42, third flat window mirror 43, first magnet 51, second magnet 52, flavonoid gasket 6, driving device 7. Detailed implementation manners
[0017] The following describes the preferred implementation manners of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.
[0018] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0019] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0020] Example 1: As Figures 1 to 2 、 Figures 7 to 8 shown, the multi-wavelength high-power field lens of the present invention includes: a field lens body 1, the field lens body 1 has an incident port 11 and an exit port 12, and an optical component 2 is accommodated in the field lens body 1; an adjusting mechanism, which has a first adjusting component 31 provided at the incident port 11 of the field lens body 1 and a second adjusting component 32 provided at the exit port 12 of the field lens. The first adjusting component 31 can selectively configure the first flat window lens 41 at the incident port 11 of the field lens body 1, and the second adjusting component 32 can selectively configure the second flat window lens 42 or the third flat window lens 43 at the exit port 12 of the field lens body 1; the first adjusting component 31 includes a first lens holder 311 detachably provided at the incident port 11 of the field lens body 1, and the first flat window lens 41 is placed in the first lens holder 311; the second adjusting component 32 includes a second lens holder 321 detachably provided at the exit port 12 of the field lens body 1, and the second flat window lens 42 or the third flat window lens 43 is placed in the second lens holder 321.
[0021] See Figure 2 , the field lens body 1 has an axially penetrating cavity, the two ends of the cavity are respectively the incident port 11 and the exit port 12, and an optical component 2 is accommodated in the cavity. The optical component 2 is composed of several lenses to focus the laser beam incident through the incident port 11.
[0022] See Figure 1 、 Figure 2 , the adjusting mechanism includes a first adjusting component 31 and a second adjusting component 32; the first adjusting component 31 at least includes a first lens holder 311 and a first flat window lens 41. The first lens holder 311 is provided with a stepped layer at one end facing the field lens body 1 to accommodate the first flat window lens 41. The first lens holder 311 can clamp the first flat window lens 41 at the incident port 11 of the field lens body 1. The first lens holder 311 is detachably provided at the incident port 11 of the field lens body 1 to facilitate the replacement of the damaged first flat window lens 41; the second adjusting component 32 at least includes a second lens holder 321 and a second flat window lens 42. The second lens holder 321 is provided with a stepped layer at one end facing the field lens body 1 to accommodate the second flat window lens 42 or the third flat window lens 43. The second lens holder 321 can clamp the second flat window lens 42 or the third flat window lens 43 at the exit port 12 of the field lens body 1. The second lens holder 321 is detachably provided at the exit port 12 of the field lens body 1 to facilitate the replacement of the damaged second flat window lens 42 or the third flat window lens 43.
[0023] It should be noted that the specific types of the first flat window lens 41, the second flat window lens 42 and the third flat window lens 43 are not limited and can be selected according to actual production needs.
[0024] In this application, the first flat window mirror 41 is disposed at the incident port 11 of the field lens main body 1 through the first lens holder 311, and the second flat window mirror 42 or the third flat window mirror 43 is disposed at the exit port 12 of the field lens main body 1 through the second lens holder 321. This enables the field lens of this application to adjust the type of the flat window mirror according to different types of laser beams, so that after the laser beam passes through the field lens and exits, the focus of the laser beam can be focused on the same focal plane. Specifically, when a GR laser beam or a NIR laser beam enters through the incident port 11 of the field lens main body 1, the first flat window mirror 41 is installed or removed at the incident port 11 of the field lens main body 1 through the first lens holder 311, and the second flat window mirror 42 or the third flat window mirror 43 is installed or removed at the exit port 12 of the field lens main body 1 through the second lens holder 321 to meet the adjustment of the focusing points of different laser beams, achieve the consistency of the processing performance of multiple-wavelength lasers, realize the rapid adjustment and adaptation when switching between different-wavelength laser beams, reduce the hardware manufacturing difficulty of multi-band laser processing technology, and improve the scope of application of the product. In addition, through this setting, when a single first flat window mirror 41 or the second flat window mirror 42 or the third flat window mirror 43 is damaged, the problem of needing to replace the entire field lens optical lens group can be avoided, and the production cost can be reduced.
[0025] In one or more embodiments, first magnets 51 are installed on both the first lens holder 311 and the second lens holder 321, and second magnets 52 that are adapted to the positions of the first magnets 51 and attractively magnetic are installed at both the incident port 11 and the exit port 12 of the field lens main body 1.
[0026] See Figure 1 、 Figure 2 , second magnets 52 are installed at both the incident port 11 and the exit port 12 of the field lens main body 1. The number of the second magnets 52 can be selected according to actual production needs, and there is no specific limitation. A first magnet 51 corresponding to the number and position of the second magnet 52 at the incident port 11 of the field lens main body 1 is installed inside one end of the first lens holder 311 facing the incident port 11 of the field lens main body 1, and a second magnet 52 corresponding to the number and position of the second magnet 52 at the exit port 12 of the field lens main body 1 is installed inside one end of the second lens holder 321 facing the exit port 12 of the field lens main body 1. When installing or removing the first lens holder 311 or the second lens holder 321, it is only necessary to snap the first lens holder 311 onto the incident port 11 of the field lens main body 1 and snap the second lens holder 321 onto the exit port 12 of the field lens main body 1, so that the first magnets 51 on the first lens holder 311 and the second lens holder 321 are attractively magnetic with the second magnets 52 at the incident port 11 and the exit port 12 of the field lens main body 1, thereby realizing the installation and replacement of the first flat window mirror 41 at the incident port 11 of the field lens main body 1 and the second flat window mirror 42 or the third flat window mirror 43 at the exit port 12 of the field lens main body 1, and further improving the efficiency of adjusting the field lens optical combination in this application.
[0027] In other possible embodiments, the first lens holder 311 and the incident port 11 of the field lens body 1 are in threaded connection, and the second lens holder 321 and the exit port 12 of the field lens body 1 are in threaded connection.
[0028] In one or more embodiments, a flavonoid gasket 6 is disposed between the first flat window lens 41 and the incident port 11 of the field lens body 1, and between the second flat window lens 42 or the third flat window lens 43 and the exit port 12 of the field lens body 1. Refer to Figure 1 、 Figure 2 , the flavonoid gasket 6 between the first flat window lens 41 and the incident port 11 of the field lens body 1 can improve the stability of the fixation of the first flat window lens 41 and reduce the possibility of loosening of the first flat window lens 41; the flavonoid gasket 6 between the second flat window lens 42 or the third flat window lens 43 and the exit port 12 of the field lens body 1 can improve the stability when the second flat window lens 42 or the third flat window lens 43 is fixed, reduce the possibility of its loosening, and ensure the stability of the laser processing performance of the workpiece.
[0029] In one or more embodiments, the first flat window lens 41 and the third flat window lens 43 are made of high Abbe number optical materials. The high Abbe number optical material can be a fluoride crystal, specifically calcium fluoride or magnesium fluoride material.
[0030] In one or more embodiments, the second flat window lens 42 is made of a combination of a high Abbe number optical material and a gradient refractive index lens material. The gradient refractive index lens material can withstand a high damage threshold and is compatible with lasers of multiple wavelengths, improving the application scope of the present application.
[0031] In one or more embodiments, a cooling cavity 13 is formed in the field lens body 1. The cooling cavity 13 has a liquid inlet 14 and a liquid outlet 15 that penetrate the outer side surface of the field lens body 1; the cooling cavity 13 is one of an annular shape and a serpentine shape.
[0032] Refer to Figure 2, a cooling cavity 13 is formed in the field lens body 1. The shape of the cooling cavity 13 can be annular or serpentine. The cooling cavity 13 has a liquid inlet 14 and a liquid outlet 15 that penetrate the outer side surface of the field lens body 1. The liquid inlet 14 is connected to an external pump body through a first quick-connect rotary elbow and a pipeline, and the liquid outlet 15 is communicated with an external tank through a second quick-connect rotary elbow and a pipeline. When the field lens is working, the laser beam will conduct heat to the optical lens when passing through the optical lens. To ensure the stability of the optical lens during operation, it is necessary to cool and dissipate heat from the optical lens. At this time, the pump body is used to pump the coolant into the cooling cavity 13 through the pipeline and the first quick-connect rotary elbow. The coolant flows in the cooling cavity 13 to exchange heat with the field lens body 1 and the optical lens. The heat-exchanged coolant flows out through the liquid outlet 15 and the second quick-connect rotary elbow, and this cycle is repeated to achieve rapid cooling of the optical lens and improve the stability of laser processing.
[0033] Embodiment 2: See Figures 3 to 8 , as the second embodiment of the present invention, the same or corresponding components as those in the first embodiment adopt the corresponding reference numerals in the first embodiment. Only the differences between the second embodiment and the first embodiment will be described below.
[0034] Figure 5 Shown as the same as Figure 2 The field lens body 1 and the optical component 2 with the same design as shown. The difference between the second embodiment and the first embodiment lies in the different structures of the first adjustment component 31 and the second adjustment component 32. In the second embodiment, the first adjustment component 31 for placing the first flat window lens 41 at the incident port 11 of the field lens body 1 and the second adjustment component 32 for placing the second flat window lens 42 or the third flat window lens 43 at the exit port 12 of the field lens body 1 are changed.
[0035] In the second embodiment, the first adjustment component 31 is a drawer mirror base 312 having a first hole position 3121 and a second hole position 3122. The first flat window mirror 41 is installed in the first hole position 3121 or the second hole position 3122 of the drawer mirror base 312. The second adjustment component 32 is a rotating wheel mirror base 322 having a third hole position 3221, a fourth hole position 3222, and a fifth hole position 3223. The second flat window mirror 42 and the third flat window mirror 43 are respectively installed in any two hole positions of the rotating wheel mirror base 322. Specifically, the drawer mirror base 312 adopts a translational movement method to selectively place the first hole position 3121 or the second hole position 3122 directly above the incident port 11 of the field lens body 1, and then a first flat window mirror 41 is provided or no optical lens is provided directly above the incident port 11 of the field lens body 1. The third hole position 3221, the fourth hole position 3222, and the fifth hole position 3223 are evenly arranged on the rotating wheel mirror base centered on the central axis of the rotating wheel mirror base. By rotating the rotating wheel mirror base, the third hole position 3221, the fourth hole position 3222, or the fifth hole position 3223 can be selectively placed directly below the exit port 12 of the field lens body 1, so that the second flat window mirror 42 and the third flat window mirror 43 can be selectively placed directly below the exit port 12 of the field lens body 1, or an optical lens is provided at the exit port 12 of the field lens body 1. Through this kind of setting, when the field lens of the present application faces laser beams of different wavelengths, timely adjustment of the optical lens group can be made, further realizing the consistency of the processing performance of multiple-wavelength lasers, reducing the hardware manufacturing difficulty of multi-band laser processing technology, and increasing the applicable range of the present application. Compared with the first embodiment, in the second embodiment, it is not necessary to disassemble the drawer mirror base 312 from the incident port 11 of the field lens body 1, nor to disassemble the rotating wheel mirror base from the exit port 12 of the field lens body 1. Only by moving the drawer mirror base 312 or rotating the rotating wheel mirror base, the adjustment of the positions of the first flat window mirror 41, the second flat window mirror 42, or the third flat window mirror 43 can be realized, further improving the adjustment efficiency of the field lens optical lens group of the present application and the processing efficiency of laser processing of workpieces.
[0036] In one or more embodiments, the rotating wheel mirror base 322 is controlled to rotate by a driving device 7. The driving device 7 can be a micro servo reduction gear.
[0037] In one or more embodiments, the drawer mirror base 312 is controlled to move by a cylinder.
[0038] The above embodiments are only for explaining the technical concept and features of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.
Claims
1. A multi-wavelength high-power field lens, characterized in that, Comprising: A field lens body having an incident port and an exit port, and an optical component is accommodated in the field lens body; An adjusting mechanism having a first adjusting component disposed at the incident port of the field lens body and a second adjusting component disposed at the exit port of the field lens. The first adjusting component can selectively configure a first flat window lens at the incident port of the field lens body, and the second adjusting component can selectively configure a second flat window lens or a third flat window lens at the exit port of the field lens body.
2. The multi-wavelength high-power field lens according to claim 1, wherein: The first adjusting component includes a first lens holder detachably disposed at the incident port of the field lens body, and the first flat window lens is placed within the first lens holder; The second adjusting component includes a second lens holder detachably disposed at the exit port of the field lens body, and the second flat window lens or the third flat window lens is placed within the second lens holder.
3. The multi-wavelength high-power field lens according to claim 1, wherein: The first adjusting component includes a drawer lens holder having a first hole position and a second hole position. The first flat window lens is configured within the first hole position or the second hole position. The drawer lens holder is disposed directly above the incident port of the field lens body, and the drawer lens holder can translate directly above the field lens body so that the first hole position or the second hole position is directly opposite the incident port; The second adjusting component includes a rotary lens holder having a third hole position, a fourth hole position, and a fifth hole position. The second flat window lens and the third flat window lens are configured within any two of the third hole position, the fourth hole position, and the fifth hole position. The third hole position, the fourth hole position, and the fifth hole position are evenly distributed around the central axis of the rotary lens holder. The rotary lens holder is disposed directly below the exit port of the field lens body and can rotate so that the third hole position, the fourth hole position, and the fifth hole position can be placed directly below the exit port.
4. The multi-wavelength high-power field lens according to claim 2, wherein: First magnets are installed on both the first lens holder and the second lens holder, and second magnets adapted to the positions of the first magnets and magnetically attracting are installed at the incident port and the exit port of the field lens body.
5. The multi-wavelength high-power field lens according to claim 2, characterized in that: Flavone gaskets are configured between the first flat window lens and the incident port of the field lens body, and between the second flat window lens or the third flat window lens and the exit port of the field lens body.
6. The multi-wavelength high-power field lens according to claim 3, characterized in that: The rotary lens holder is controlled to rotate by a driving device.
7. The multi-wavelength high-power field lens according to claim 1, wherein: The first flat window lens and the third flat window lens are made of high Abbe number optical materials.
8. The multi-wavelength high-power field lens according to claim 1, characterized in that: The second flat window lens is made of a combination of a high Abbe number optical material and a gradient refractive index lens material.
9. The multi-wavelength high-power field lens according to any one of claims 1-8, characterized in that: A cooling cavity is formed within the field lens body, and the cooling cavity has a liquid inlet and a liquid outlet penetrating the outer side surface of the field lens body.
10. The multi-wavelength high-power field lens according to claim 9, characterized in that: The cooling cavity is one of an annular shape and a serpentine shape.