Multi-wavelength high-power field lens

Abstract

The utility model discloses a multi-wavelength high-power field lens, which comprises a field lens main body provided with an entrance port and an exit port, and an optical assembly is accommodated in the field lens main body; the adjusting mechanism is provided with a first adjusting assembly arranged at the incident port of the field lens main body and a second adjusting assembly arranged at the emergent port of the field lens, and the first adjusting assembly can selectively configure a first flat window lens at the incident port of the field lens main body and can selectively configure a second flat window lens at the emergent port of the field lens main body; the second adjusting assembly can selectively configure the second flat plate window lens or the third flat plate window lens at the exit port of the field lens main body; the field lens for multi-band laser processing can solve the problems that a traditional field lens for multi-band laser processing is complex in structure, high in production cost and high in hardware manufacturing difficulty.

Description

Technical Field

[0001] This utility model relates to the field of laser processing equipment, specifically to a multi-wavelength high-power field lens. Background Technology

[0002] Multi-wavelength laser processing significantly improves processing efficiency, accuracy, and material adaptability by combining lasers of different wavelengths working in synergy, making it particularly suitable for manufacturing complex materials, multi-layered structures, and precision devices. However, in conventional applications, when laser beams of different wavelengths are focused by the same lens, aberrations can cause the optimal focused spots of different wavelengths to not be on the same focal plane. This is especially true in field lens laser processing applications, where the processing area, processing accuracy, and working distance will vary depending on the wavelength of the laser.

[0003] Currently, for the design of multi-wavelength high-power field lenses, optical systems are generally designed using high Abbe number (high V value) optical materials, such as fluoride crystals (calcium fluoride, magnesium fluoride), or using graded refractive index (GRIN) lenses that can withstand high damage thresholds. However, high Abbe number optical materials are expensive and easily scratched, while graded refractive index lenses have problems such as narrow spectrum and insufficient compatibility with multi-wavelength lasers.

[0004] In view of this, this application proposes a multi-wavelength high-power field lens with easily replaceable and switchable optical lens groups. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a multi-wavelength high-power field lens.

[0006] To achieve the above objectives, the technical solution adopted by this utility model includes: a field lens body having an inlet and an outlet, and an optical component housed within the field lens body; and an adjustment mechanism having a first adjustment component disposed at the inlet of the field lens body and a second adjustment component disposed at the outlet of the field lens body, wherein the first adjustment component can selectively position a first flat panel window mirror at the inlet of the field lens body, and the second adjustment component can selectively position a second flat panel window mirror or a third flat panel window mirror at the outlet of the field lens body.

[0007] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the first adjustment component includes a first mirror mount detachably disposed on the entrance port of the field lens body, and the first flat window mirror is placed inside the first mirror mount.

[0008] The second adjustment assembly includes a second mirror mount detachably disposed on the exit port of the field lens body, wherein the second or third flat panel window mirror is placed inside the second mirror mount.

[0009] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the first adjustment component includes a drawer mirror base with a first aperture and a second aperture, the first flat window mirror is disposed in the first aperture or the second aperture, the drawer mirror base is located directly above the entrance port of the field lens body, and the drawer mirror base can be moved horizontally above the field lens body so that the first aperture or the second aperture is directly opposite the entrance port.

[0010] The second adjustment assembly includes a rotating mirror mount with a third, fourth, and fifth aperture. The second and third flat plate window mirrors are configured in any two of the third, fourth, and fifth apertures. The third, fourth, and fifth apertures are evenly distributed around the central axis of the rotating mirror mount. The rotating mirror mount is located directly below the exit port of the field mirror body and is capable of rotation, allowing the third, fourth, and fifth apertures to be positioned directly below the exit port.

[0011] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, a first magnet is installed on both the first and second lens mounts, and a second magnet that is adapted to the position of the first magnet and magnetically attracted to it is installed at both the entrance and exit of the field lens body.

[0012] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, a flavonoid gasket is provided between the first flat window mirror and the entrance port of the field lens body, and between the second or third flat window mirror and the exit port of the field lens body.

[0013] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the rotating mirror mount is controlled to rotate by a driving device.

[0014] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the first flat plate window lens and the third flat plate window lens are made of high Abbe number optical materials.

[0015] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the second flat window lens is made of a combination of high Abbe number optical material and gradient refractive index lens material.

[0016] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, a cooling cavity is provided inside the field lens body, and the cooling cavity has a liquid inlet and a liquid outlet that penetrate the outer side of the field lens body.

[0017] In the preferred technical solution of the above-mentioned multi-wavelength high-power field lens, the cooling cavity is either annular or serpentine. Attached Figure Description

[0018] Figure 1 This is the front view of Embodiment 1;

[0019] Figure 2 This is a cross-sectional view of Embodiment 1;

[0020] Figure 3 This is a schematic diagram of the drawer mirror mount in Example 2;

[0021] Figure 4 This is a connection diagram of the rotating mirror mount and the drive device in Embodiment 2;

[0022] Figure 5 The main view of Example 2 Figure 1 ;

[0023] Figure 6 The main view of Example 2 Figure 2 ;

[0024] Figure 7 Simulation diagram of GR laser beams at different positions passing through the field mirror body and focusing on the focal plane;

[0025] Figure 8 Simulation diagram of NIR laser beams at different positions passing through the field mirror body and focusing on the focal plane;

[0026] In the figure: Field lens body 1, entrance port 11, exit port 12, cooling chamber 13, liquid inlet 14, liquid outlet 15, optical component 2, first adjustment component 31, first lens mount 311, drawer lens mount 312, first hole 3121, second hole 3122, second adjustment component 32, second lens mount 321, rotating lens mount 322, third hole 3221, fourth hole 3222, fifth hole 3223, first flat window lens 41, second flat window lens 42, third flat window lens 43, first magnet 51, second magnet 52, flavonoid gasket 6, driving device 7. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1:

[0031] like Figures 1 to 2 , Figures 7 to 8 As shown, the multi-wavelength high-power field lens of this utility model includes: a field lens body 1, which has an inlet 11 and an outlet 12, and an optical component 2 is housed within the field lens body 1; an adjustment mechanism having a first adjustment component 31 disposed at the inlet 11 of the field lens body 1 and a second adjustment component 32 disposed at the outlet 12 of the field lens, wherein the first adjustment component 31 can selectively place a first flat plate window mirror 41 at the inlet 11 of the field lens body 1, and the second adjustment component 32 can selectively place a second flat plate window mirror 42 or a third flat plate window mirror 43 at the outlet 12 of the field lens body 1; the first adjustment component 31 includes a first mirror mount 311 detachably disposed on the inlet 11 of the field lens body 1, and the first flat plate window mirror 41 is placed inside the first mirror mount 311; the second adjustment component 32 includes a second mirror mount 321 detachably disposed on the outlet 12 of the field lens body 1, and the second flat plate window mirror 42 or the third flat plate window mirror 43 is placed inside the second mirror mount 321.

[0032] See Figure 2 The field lens body 1 has a cavity that runs through the axis. The two ends of the cavity are an inlet 11 and an outlet 12, respectively. The cavity contains an optical component 2, which consists of several lenses to focus the laser light entering through the inlet 11.

[0033] See Figure 1 , Figure 2The adjustment mechanism includes a first adjustment component 31 and a second adjustment component 32. The first adjustment component 31 includes at least a first lens mount 311 and a first flat panel window lens 41. The first lens mount 311 has a stepped layer at one end facing the field lens body 1 to accommodate the first flat panel window lens 41. The first lens mount 311 can secure the first flat panel window lens 41 to the entrance port 11 of the field lens body 1. The first lens mount 311 is detachably located at the entrance port 11 of the field lens body 1 to facilitate replacement of the damaged first flat panel window lens 41. The second adjustment component 32... The adjustment assembly 32 includes at least a second mirror mount 321 and a second flat panel window mirror 42. The second mirror mount 321 has a stepped layer at one end facing the field lens body 1 to accommodate the second flat panel window mirror 42 or the third flat panel window mirror 43. The second mirror mount 321 can lock the second flat panel window mirror 42 or the third flat panel window mirror 43 into the outlet 12 of the field lens body 1. The second mirror mount 321 is detachably provided at the outlet 12 of the field lens body 1 to facilitate the replacement of the damaged second flat panel window mirror 42 or the third flat panel window mirror 43.

[0034] It should be noted that the specific types of the first flat window mirror 41, the second flat window mirror 42, and the third flat window mirror 43 are not limited and can be selected according to actual production needs.

[0035] This application places a first flat panel window mirror 41 at the inlet 11 of the field lens body 1 via a first mirror mount 311, and a second flat panel window mirror 42 or a third flat panel window mirror 43 at the outlet 12 of the field lens body 1 via a second mirror mount 321. This allows the field lens of this application to adjust the type of the flat panel window mirror according to different types of laser beams, so that the focal point of the laser beam can be focused on the same focal plane after it exits the field lens. Specifically, when a GR laser beam or a NIR laser beam enters through the inlet 11 of the field lens body 1, the first flat panel window mirror 41 is installed or removed from the inlet of the field lens body 1 via the first mirror mount 311. 11. The field mirror body 1's outlet 12 is installed or removed via the second mirror mount 321 to accommodate the second flat window mirror 42 or the third flat window mirror 43. This allows for adjustments to the focal point of different laser beams, ensuring consistent processing performance across multiple wavelengths of laser light, enabling rapid adjustment and adaptation when switching between different wavelength laser beams, reducing the hardware manufacturing difficulty of multi-band laser processing technology, and expanding the product's applicability. Furthermore, this configuration avoids the need to replace the entire field mirror optical assembly when a single first flat window mirror 41, second flat window mirror 42, or third flat window mirror 43 is damaged, thus reducing production costs.

[0036] In one or more embodiments, a first magnet 51 is installed on both the first mirror mount 311 and the second mirror mount 321, and a second magnet 52 is installed on both the inlet 11 and the outlet 12 of the field lens body 1, which are adapted to the position of the first magnet 51 and are magnetically attracted to it.

[0037] See Figure 1 , Figure 2 A second magnet 52 is installed at both the inlet 11 and outlet 12 of the field lens body 1. The number of second magnets 52 can be selected according to actual production needs and is not limited. A first lens mount 311 has first magnets 51 installed at the end facing the inlet 11 of the field lens body 1, with the number and position corresponding to the second magnets 52 at the inlet 11. A second lens mount 321 has second magnets 52 installed at the end facing the outlet 12 of the field lens body 1, with the number and position corresponding to the second magnets 52 at the outlet 12. The first lens mount 311 can be installed and removed. When using the second lens mount 321, it is only necessary to fasten the first lens mount 311 to the entrance port 11 of the field lens body 1 and the second lens mount 321 to the exit port 12 of the field lens body 1, so that the first magnet 51 on the first lens mount 311 and the second lens mount 321 is magnetically attracted to the second magnet 52 on the entrance port 11 and the exit port 12 of the field lens body 1. This enables the installation and replacement of the first flat plate window mirror 41 at the entrance port 11 of the field lens body 1, the second flat plate window mirror 42 or the third flat plate window mirror 43 at the exit port 12 of the field lens body 1, further improving the efficiency of field lens optical assembly adjustment in this application.

[0038] In other possible implementations, the first mirror mount 311 is threadedly connected to the inlet 11 of the field lens body 1, and the second mirror mount 321 is threadedly connected to the outlet 12 of the field lens body 1.

[0039] In one or more embodiments, a flavonoid gasket 6 is disposed between the first flat panel window mirror 41 and the entrance port 11 of the field lens body 1, and between the second flat panel window mirror 42 or the third flat panel window mirror 43 and the exit port 12 of the field lens body 1. See Figure 1 , Figure 2 The flavonoid gasket 6 between the first flat window mirror 41 and the entrance port 11 of the field mirror body 1 can improve the stability of the first flat window mirror 41 being fixed and reduce the possibility of the first flat window mirror 41 loosening; the flavonoid gasket 6 between the second flat window mirror 42 or the third flat window mirror 43 and the exit port 12 of the field mirror body 1 can improve the stability of the second flat window mirror 42 or the third flat window mirror 43 when it is fixed and reduce the possibility of it loosening, thus ensuring the stability of the laser processing performance of the workpiece.

[0040] In one or more embodiments, the first flat plate window mirror 41 and the third flat plate window mirror 43 are made of high Abbe number optical materials. High Abbe number optical materials can be fluoride crystals, specifically calcium fluoride or magnesium fluoride.

[0041] In one or more embodiments, the second flat window mirror 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 a wide range of laser wavelengths, thus improving the applicability of this application.

[0042] In one or more embodiments, a cooling cavity 13 is provided inside the field lens body 1. The cooling cavity 13 has a liquid inlet 14 and a liquid outlet 15 that penetrate the outer side of the field lens body 1. The cooling cavity 13 is either annular or serpentine.

[0043] See Figure 2 The cooling chamber 13 is located inside the field lens body 1. The shape of the cooling chamber 13 can be annular or serpentine. The cooling chamber 13 has a liquid inlet 14 and a liquid outlet 15 that penetrate the outer side 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 pipeline, and the liquid outlet 15 is connected to an external tank through a second quick-connect rotary elbow and pipeline. When the field lens is working, the laser beam will conduct heat to the optical lens when it passes through the optical lens. In order to ensure the stability of the optical lens during operation, the optical lens needs to be cooled and dissipated. At this time, the pump body draws the coolant into the cooling chamber 13 through pipeline and the first quick-connect rotary elbow. The coolant flows in the cooling chamber 13 to exchange heat with the field lens body 1 and the optical lens. After heat exchange, the coolant flows out through the liquid outlet 15 and the second quick-connect rotary elbow. This cycle is repeated to achieve rapid cooling of the optical lens and improve the stability of laser processing.

[0044] Example 2:

[0045] See Figures 3 to 8 As a second embodiment of the present invention, the same or corresponding parts as those in the first embodiment are referred to by the same reference numerals as those in the first embodiment. The following only describes the differences between the second embodiment and the first embodiment.

[0046] Figure 5 The image shown is related to Figure 2 The field lens body 1 and optical components 2 are designed identically. 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, which is used to place the first flat plate window mirror 41 at the entrance port 11 of the field lens body 1, and the second adjustment component 32, which is used to place the second flat plate window mirror 42 or the third flat plate window mirror 43 at the exit port 12 of the field lens body 1, have been modified.

[0047] In the second embodiment, the first adjustment component 31 is a drawer mirror base 312 with a first hole 3121 and a second hole 3122. The first flat window mirror 41 is installed in the first hole 3121 or the second hole 3122 of the drawer mirror base 312. The second adjustment component 32 is a rotating mirror base 322 with a third hole 3221, a fourth hole 3222, and a fifth hole 3223. The second flat window mirror 42 and the third flat window mirror 43 are respectively installed in any two holes of the rotating mirror base 322. Specifically, the drawer mirror base 312 is moved by a translational method, selectively placing the first hole 3121 or the second hole 3122 directly above the entrance 11 of the field lens body 1, thereby setting the first flat window mirror 41 or not setting a light source directly above the entrance 11 of the field lens body 1. The optical lens is arranged such that the third aperture 3221, the fourth aperture 3222, and the fifth aperture 3223 are evenly arranged on the rotating mirror base with the central axis of the rotating mirror base as the center. By rotating the rotating mirror base, the third aperture 3221, the fourth aperture 3222, or the fifth aperture 3223 can be selectively placed directly below the exit port 12 of the field lens body 1, and the second flat plate window mirror 42 and the third flat plate window mirror 43 can be selectively placed directly below the exit port 12 of the field lens body 1, or optical lenses can be set at the exit port 12 of the field lens body 1. Through this arrangement, the field lens of this application can make timely adjustments to the optical lens group when facing laser beams of different wavelengths, further achieving the consistency of laser processing performance of multiple wavelengths, reducing the hardware manufacturing difficulty of multi-band laser processing technology, and improving the applicability of this application. Compared to the first embodiment, in the second embodiment, it is not necessary to disassemble the drawer mirror mount 312 from the inlet 11 of the field lens body 1 or the rotary mirror mount from the outlet 12 of the field lens body 1. Only by moving the drawer mirror mount 312 or rotating the rotary mirror mount can the position of the first flat window mirror 41, the second flat window mirror 42 or the third flat window mirror 43 be adjusted, which further improves the adjustment efficiency of the field lens optical assembly and the efficiency of laser processing of workpieces.

[0048] In one or more embodiments, the rotating mirror mount 322 is controlled to rotate by the drive device 7. The drive device 7 may be a miniature servo reducer.

[0049] In one or more embodiments, the drawer mirror mount 312 is moved by a cylinder.

[0050] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-wavelength high-power field mirror, characterized in that, include: A field lens body, the field lens body having an entrance port and an exit port, and the field lens body housing optical components; The adjustment mechanism has a first adjustment component located at the entrance of the field lens body and a second adjustment component located at the exit of the field lens body. The first adjustment component can selectively arrange a first flat panel window lens at the entrance of the field lens body, and the second adjustment component can selectively arrange a second flat panel window lens or a third flat panel window lens at the exit of the field lens body.

2. The multi-wavelength high-power field mirror according to claim 1, characterized in that: The first adjustment assembly includes a first mirror mount detachably disposed on the entrance port of the field lens body, and the first flat window mirror is placed inside the first mirror mount; The second adjustment assembly includes a second mirror mount detachably disposed on the exit port of the field lens body, wherein the second or third flat panel window mirror is placed inside the second mirror mount.

3. The multi-wavelength high-power field mirror according to claim 1, characterized in that: The first adjustment component includes a drawer mirror holder with a first hole and a second hole. The first flat window mirror is disposed in the first hole or the second hole. The drawer mirror holder is located directly above the entrance of the field lens body. The drawer mirror holder can be moved horizontally above the field lens body so that the first hole or the second hole is directly opposite the entrance. The second adjustment assembly includes a rotating mirror mount with a third, fourth, and fifth aperture. The second and third flat plate window mirrors are configured in any two of the third, fourth, and fifth apertures. The third, fourth, and fifth apertures are evenly distributed around the central axis of the rotating mirror mount. The rotating mirror mount is located directly below the exit port of the field mirror body and is capable of rotation, allowing the third, fourth, and fifth apertures to be positioned directly below the exit port.

4. The multi-wavelength high-power field mirror according to claim 2, characterized in that: Both the first and second mirror mounts are equipped with a first magnet, and the entrance and exit ports of the field lens body are equipped with a second magnet that is adapted to the position of the first magnet and is magnetically attracted to it.

5. The multi-wavelength high-power field mirror according to claim 2, characterized in that: A flavonoid gasket is disposed between the first flat panel window mirror and the entrance port of the field lens body, and between the second or third flat panel window mirror and the exit port of the field lens body.

6. The multi-wavelength high-power field mirror according to claim 3, characterized in that: The rotating mirror mount is controlled to rotate by a drive device.

7. The multi-wavelength high-power field mirror according to claim 1, characterized in that: The first and third flat plate window mirrors are made of high Abbe number optical materials.

8. The multi-wavelength high-power field mirror according to claim 1, characterized in that: The second flat window mirror is made of a combination of high Abbe number optical material and gradient refractive index lens material.

9. The multi-wavelength high-power field mirror according to any one of claims 1-8, characterized in that: The field lens body has a cooling cavity inside, and the cooling cavity has a liquid inlet and a liquid outlet that penetrate the outer side of the field lens body.

10. The multi-wavelength high-power field mirror according to claim 9, characterized in that: The cooling cavity is either annular or serpentine.

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