Laser linear cleaning device with double light sources

By combining laser light sources of different pulse widths in the laser linear cleaning device, the problem of low cleaning efficiency in the prior art is solved, and the effect of efficient removal of high threshold ink is achieved.

CN222220577UActive Publication Date: 2024-12-24GUANGDONG ZHONGKE MICROFINE PHOTONICS MFG TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202420654877.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-01
Publication Date
2024-12-24
Estimated Expiration
2034-04-01

AI Technical Summary

Technical Problem

In the prior art, when using nanosecond fiber laser or nanosecond solid laser to clean high threshold ink, the cleaning efficiency is low and there is a problem of unclear cleaning.

Method used

Design a laser linear cleaning device with dual light sources, adopting the first laser light source structure and the second laser light source structure. The two have different laser pulse widths, and the transmission directions are perpendicular to each other. Through the beam-combining structure, reflection structure, beam shaping structure and The focus structure combines the two laser light sources on the surface of the material, and uses the sustainability of the longer pulse width laser and the instantaneous explosiveness of the shorter pulse width laser to enhance the cleaning effect.

Benefits of technology

It realizes efficient removal of inks with high laser cleaning thresholds, and improves the cleaning effect of difficult-to-clean materials.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222220577U_ABST
    Figure CN222220577U_ABST
Patent Text Reader

Abstract

The utility model relates to a double-light-source laser linear cleaning device which comprises a first laser light source structure, a second laser light source structure, a beam combining structure, a reflecting structure, a beam shaping structure, a focusing structure and a material carrying structure. The transmission directions are vertical to each other; the beam combining structure is arranged at the laser intersection of the first laser light source structure and the second laser light source structure; the reflecting structure is arranged in the emergent light transmission direction of the beam combining structure; the light beam shaping structure is arranged in the emergent light transmission direction of the reflection structure; the focusing structure is arranged in the emergent light transmission direction of the light beam shaping structure. According to the laser cleaning device, the long-time continuity of the laser with the long pulse width and the instant explosiveness of the laser with the short pulse width are utilized at the same time, printing ink with the high laser cleaning threshold value can be efficiently and powerfully removed, and cleaning of materials difficult to clean is achieved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of laser processing, and in particular relates to a laser linear cleaning device with double light sources. Background Art

[0002] Laser cleaning technology can be traced back to the 1960s. It has the advantages of good cleaning effect, wide application range, high precision, non-contact and good accessibility. It has broad application prospects in industrial manufacturing, production and maintenance.

[0003] In the glass processing industry, nanosecond fiber lasers or nanosecond solid-state lasers are usually used to clean glass inks or conductive layers.

[0004] However, for inks with a higher laser cleaning threshold, the cleaning efficiency using nanosecond fiber laser or nanosecond solid laser is low, and there is a problem of incomplete cleaning. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a dual-light source laser linear cleaning device. The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A dual-light source laser linear cleaning device comprises: a first laser light source structure, a second laser light source structure, a beam combining structure, a reflection structure, a beam shaping structure, a focusing structure and a material carrying structure, wherein:

[0007] The first laser light source structure and the second laser light source structure have different laser pulse widths, and transmission directions are perpendicular to each other;

[0008] The beam combining structure is arranged at the intersection of the laser beams of the first laser light source structure and the second laser light source structure;

[0009] The reflective structure is arranged in the transmission direction of the outgoing light of the beam combining structure;

[0010] The beam shaping structure is arranged in the transmission direction of the outgoing light of the reflective structure;

[0011] The focusing structure is arranged in the transmission direction of the outgoing light of the beam shaping structure;

[0012] The material carrying structure is arranged in the outgoing light transmission direction of the focusing structure.

[0013] In a specific embodiment, the first laser light source structure includes: a first pulse fiber laser, a first beam expander and a first reflector, wherein:

[0014] The first beam expander and the first reflector are sequentially arranged in the laser transmission direction of the first pulse fiber laser.

[0015] In a specific embodiment, the first pulse fiber laser comprises a nanosecond pulse fiber laser.

[0016] In a specific embodiment, the second laser light source structure includes: a second pulse fiber laser, a second beam expander, a second reflector, a delay device and a third reflector, wherein:

[0017] The second beam expander and the second reflector are sequentially arranged in the laser transmission direction of the second pulse fiber laser;

[0018] The delay device is arranged in the transmission direction of the outgoing light of the second reflector;

[0019] The third reflector is arranged in the transmission direction of the outgoing light of the delay device.

[0020] In a specific embodiment, the second pulse fiber laser includes a picosecond pulse fiber laser or a femtosecond pulse fiber laser;

[0021] The time delay device comprises a hollow roof prism reflector.

[0022] In a specific embodiment, the beam combining structure includes a beam combining mirror; and the reflection structure includes a reflection mirror.

[0023] In a specific embodiment, the beam shaping structure includes a beam shaping mirror and a driving assembly;

[0024] The beam shaping mirror is arranged in the transmission direction of the outgoing light of the reflective structure;

[0025] The driving assembly is fixedly connected to the beam shaping mirror to drive the beam shaping mirror to rotate.

[0026] In a specific embodiment, the focusing structure includes a focusing lens; the focusing lens is arranged in the outgoing light transmission direction of the beam shaping mirror.

[0027] In a specific embodiment, it also includes a first motion platform, wherein:

[0028] The beam shaping structure and the focusing structure are connected to the first motion platform to move along with the movement of the first motion platform.

[0029] In a specific embodiment, it also includes a second motion platform, wherein:

[0030] The material carrying structure is connected to the second motion platform to move along with the movement of the second motion platform.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] By setting a first laser light source structure and a second laser light source structure, and compounding two laser light sources with different pulse widths in the optical path, the two laser light sources are triggered at the same time during the cleaning process, and the two laser light sources are injected into the material surface at the same time. At the same time, the long-term persistence of the laser with a longer pulse width and the instantaneous burst of the laser with a shorter pulse width are utilized. The laser with the shorter pulse width tears the surface of the material, and the laser with the longer pulse width injects high energy at the same position, so that the thermal effect of the laser with the longer pulse width and the impact of the instantaneous burst of the laser with the shorter pulse width are greatly enhanced, and the ink with a high laser cleaning threshold can be removed efficiently and effectively, thereby achieving the cleaning of difficult-to-clean materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a dual-light source laser linear cleaning device in an embodiment of the utility model;

[0034] Figure 2 It is a structural schematic diagram of a dual-light source laser linear cleaning device in an embodiment of the utility model.

[0035] Reference numerals:

[0036] 1: first laser light source structure; 2: second laser light source structure; 3: beam combining structure; 4: reflection structure; 5: beam shaping structure; 6: focusing structure; 7: material carrying structure; 101: first pulse fiber laser; 102: first beam expander; 103: first reflector; 201: second pulse fiber laser; 202: second beam expander; 203: second reflector; 204: delay device; 205: third reflector. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with specific embodiments, but the implementation methods of the present invention are not limited thereto.

[0038] Embodiment 1

[0039] See also Figure 1 , Figure 1 It is a structural schematic diagram of a dual-light source laser linear cleaning device in an embodiment of the utility model.

[0040] The present embodiment provides a dual-light source laser linear cleaning device comprising: a first laser light source structure 1, a second laser light source structure 2, a beam combining structure 3, a reflection structure 4, a beam shaping structure 5, a focusing structure 6 and a material carrying structure 7, wherein the first laser light source structure 1 and the second laser light source structure 2 have different laser pulse widths, and the transmission directions are perpendicular to each other. The beam combining structure 3 is arranged at the laser intersection of the first laser light source structure 1 and the second laser light source structure 2, the reflection structure 4 is arranged in the transmission direction of the outgoing light of the beam combining structure 3, the beam shaping structure 5 is arranged in the transmission direction of the outgoing light of the reflection structure 4, the focusing structure 6 is arranged in the transmission direction of the outgoing light of the beam shaping structure 5, and the material carrying structure 7 is arranged in the transmission direction of the outgoing light of the focusing structure 6.

[0041] Specifically, the laser of the first laser light source structure 1 is transmitted to the beam combining structure 3 along a first direction, and the laser of the second laser light source structure 2 is transmitted to the beam combining structure 3 along a second direction perpendicular to the first direction. The beam combining structure 3 combines the laser of the first laser light source structure 1 and the laser of the second laser light source structure 2 in one optical path to generate a combined beam, which is reflected to the beam shaping structure 5 by the reflection structure 4. According to the scanning processing requirements, the beam shaping structure 5 shapes the combined beam reflected by the reflection structure 4 into a circular flat top light or a square flat top light or a linear light spot. The focusing structure 6 focuses the beam shaped by the beam shaping structure 5 and irradiates it on the material carrying structure 7.

[0042] Specifically, see Figure 2 The first laser light source structure 1 includes: a first pulse fiber laser 101, a first beam expander 102 and a first reflector 103, wherein the first beam expander 102 and the first reflector 103 are sequentially arranged in the laser transmission direction of the first pulse fiber laser 101. The first pulse fiber laser 101 includes a nanosecond pulse fiber laser.

[0043] Specifically, the first beam expander 102 is used to expand and shape the nanosecond fiber laser spot generated by the nanosecond pulse fiber laser. The first beam expander 102 includes a fixed-magnification beam expander or a variable-magnification beam expander. In this embodiment, a 1.5-fold fixed-magnification beam expander is preferred. The nanosecond pulse fiber laser of this embodiment is preferably a 1-4000KHZ@600W@1064nm fiber laser. It should be noted that the light source selection of the nanosecond pulse fiber laser is not limited to a nanosecond infrared light source, but can also be a continuous light source in other bands or a quasi-continuous light source in other bands, a continuous or MOPA type light source, and the power is not limited to the 600W level, but can also include different levels such as tens of watts to several kilowatts.

[0044] Specifically, the second laser light source structure 2 includes: a second pulse fiber laser 201, a second beam expander 202, a second reflector 203, a delay device 204 and a third reflector 205, wherein the second beam expander 202 and the second reflector 203 are sequentially arranged in the laser transmission direction of the second pulse fiber laser 201, the delay device 204 is arranged in the output light transmission direction of the second reflector 203, and the third reflector 205 is arranged in the output light transmission direction of the delay device 204. The second pulse fiber laser 201 includes a picosecond pulse fiber laser or a femtosecond pulse fiber laser, and the delay device 204 includes a hollow roof prism reflector.

[0045] Specifically, the light source of the picosecond pulse fiber laser includes a picosecond light source of infrared, ultraviolet, green light or other wavelengths, and the femtosecond pulse fiber laser includes a femtosecond light source of infrared, ultraviolet, green light or other wavelengths. In this embodiment, a 1000KHZ@30W@1064nm laser is preferred. The second beam expander 202 is used to expand and shape the picosecond or femtosecond fiber laser spot generated by the second pulse fiber laser 201. The second beam expander 202 includes a fixed-magnification beam expander or a variable-magnification beam expander. In this embodiment, a 3.5-fold fixed-magnification beam expander is preferred. The delay device 204 is used to ensure the consistency of the time when the two laser beams of the first laser light source structure 1 and the second laser light source structure 2 reach the material surface on the material carrying structure 7. Due to the problem of optical path, the light beams will reach the material surface in sequence. In order to enhance the absorption characteristics, the delay device 204 is used in this embodiment to compensate for the spatial delay of the light so that the two light sources reach the material surface at the same time. The time delay device 204 of this embodiment is preferably a hollow roof prism reflector, which controls the translation of the hollow roof prism reflector to extend the spatial transit time of the light beam, thereby achieving optical time delay. The laser generated by the second pulse fiber laser 201 is expanded and shaped by the second beam expander 202, and then reflected to the hollow roof prism reflector by the third reflector 205. After the laser beam is reflected twice inside the hollow roof prism reflector, it reaches the third reflector 205, and then is reflected to the beam combining structure 3 by the third reflector 205. Changing the distance between the hollow roof prism reflector and the second reflector 203 can control the time for the light beam to be transmitted between the second reflector 203, the time delay device 204 and the third reflector 205, thereby achieving optical time delay.

[0046] Specifically, the beam combining structure 3 includes a beam combining mirror; the reflecting structure 4 includes a reflecting mirror. The beam shaping structure 5 includes a beam shaping mirror and a driving component, the beam shaping mirror is arranged in the outgoing light transmission direction of the reflecting structure 4, and the driving component is fixedly connected to the beam shaping mirror to drive the beam shaping mirror to rotate. The focusing structure 6 includes a focusing lens, which is arranged in the outgoing light transmission direction of the beam shaping mirror.

[0047] Specifically, the beam combiner combines the light sources generated by the first laser light source structure 1 and the second laser light source structure 2 into a complex light source of different wavelengths or a monochromatic light source or a complex light source composed of multiple groups of light beams. The combined light source is reflected to the beam shaping mirror by a reflector. According to the scanning processing requirements, the beam shaping mirror shapes the combined light beam reflected by the reflector into a circular flat top light or a square flat top light or a linear light spot. The focusing lens focuses the light shaped by the beam shaping mirror and irradiates it on the material carrying structure 7. The driving component in this embodiment includes a DD motor, and the beam shaping mirror is arranged on the DD motor. The beam shaping mirror is used to shape the light beam into a linear light spot, and the angle of the beam shaping mirror is adjusted by rotating the DD motor to adjust the morphology distribution of the light spot. The focal length of the focusing lens is 60~330.

[0048] In an achievable manner, the laser linear cleaning device further comprises a first motion platform, wherein the beam shaping structure 5 and the focusing structure 6 are connected to the first motion platform to move along with the movement of the first motion platform.

[0049] Specifically, the first motion platform includes a gantry motion platform, and the beam shaping structure 5 and the focusing structure 6 are mounted on the gantry motion platform, and the gantry motion platform drives the beam shaping structure 5 and the focusing structure 6 to perform flight scanning.

[0050] In one achievable manner, the laser linear cleaning device further includes a second motion platform, wherein the material carrying structure 7 is connected to the second motion platform to move along with the movement of the second motion platform.

[0051] Specifically, the second motion platform includes a cross-slide motion platform, and the material carrying structure 7 is carried on the cross-slide motion platform. The cross-slide motion platform drives the material carrying structure 7 and the material arranged on the material carrying structure 7 to perform two-dimensional or multi-dimensional space trajectory motion.

[0052] The present embodiment provides a dual-light source laser linear cleaning device, which provides a first laser light source structure 1 and a second laser light source structure 2, and compounds two laser light sources with different pulse widths in an optical path, triggers the two laser light sources simultaneously during the cleaning process, and injects the two laser light sources into the material surface simultaneously. The long-term persistence of the laser with a longer pulse width and the instantaneous burst of the laser with a shorter pulse width are utilized simultaneously, so that the laser with the shorter pulse width tears the material surface, and the laser with the longer pulse width injects high energy at the same position, so that the thermal effect of the laser with the longer pulse width and the impact of the instantaneous burst of the laser with the shorter pulse width are greatly enhanced, and the ink with a higher laser cleaning threshold can be removed efficiently and effectively, thereby achieving the cleaning of difficult-to-clean materials.

[0053] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A dual-light source laser linear cleaning device, characterized in that: include: A first laser light source structure (1), a second laser light source structure (2), a beam combining structure (3), a reflection structure (4), a beam shaping structure (5), a focusing structure (6) and a material carrying structure (7), wherein: The first laser light source structure (1) and the second laser light source structure (2) have different laser pulse widths, and their transmission directions are perpendicular to each other; The beam combining structure (3) is arranged at the intersection of the laser beams of the first laser light source structure (1) and the second laser light source structure (2); The reflection structure (4) is arranged in the transmission direction of the outgoing light of the beam combining structure (3); The beam shaping structure (5) is arranged in the transmission direction of the outgoing light of the reflective structure (4); The focusing structure (6) is arranged in the transmission direction of the outgoing light of the beam shaping structure (5); The material carrying structure (7) is arranged in the outgoing light transmission direction of the focusing structure (6).

2. The dual-light source laser linear cleaning device according to claim 1, characterized in that: The first laser light source structure (1) comprises: a first pulse fiber laser (101), a first beam expander (102) and a first reflector (103), wherein: The first beam expander (102) and the first reflector (103) are sequentially arranged in the laser transmission direction of the first pulse fiber laser (101).

3. The dual-light source laser linear cleaning device according to claim 2, characterized in that: The first pulse fiber laser (101) comprises a nanosecond pulse fiber laser.

4. The dual-light source laser linear cleaning device according to claim 1, characterized in that: The second laser light source structure (2) comprises: a second pulse fiber laser (201), a second beam expander (202), a second reflector (203), a delay device (204) and a third reflector (205), wherein: The second beam expander (202) and the second reflector (203) are sequentially arranged in the laser transmission direction of the second pulse fiber laser (201); The delay device (204) is arranged in the transmission direction of the outgoing light of the second reflector (203); The third reflector (205) is arranged in the transmission direction of the outgoing light of the delay device (204).

5. The dual-light source laser linear cleaning device according to claim 4, characterized in that: The second pulse fiber laser (201) comprises a picosecond pulse fiber laser or a femtosecond pulse fiber laser; The time delay device (204) comprises a hollow roof prism reflector.

6. The dual-light source laser linear cleaning device according to claim 1, characterized in that: The beam combining structure (3) comprises a beam combining mirror; and the reflection structure (4) comprises a reflection mirror.

7. The dual-light source laser linear cleaning device according to claim 1, characterized in that: The beam shaping structure (5) comprises a beam shaping mirror and a driving component; The beam shaping mirror is arranged in the transmission direction of the outgoing light of the reflective structure (4); The driving assembly is fixedly connected to the beam shaping mirror to drive the beam shaping mirror to rotate.

8. The dual-light source laser linear cleaning device according to claim 7, characterized in that: The focusing structure (6) comprises a focusing lens; the focusing lens is arranged in the transmission direction of the outgoing light of the beam shaping mirror.

9. The dual-light source laser linear cleaning device according to claim 1, characterized in that: Also included is a first motion platform, wherein The beam shaping structure (5) and the focusing structure (6) are connected to the first motion platform so as to move along with the movement of the first motion platform.

10. The dual-light source laser linear cleaning device according to claim 1, characterized in that: Also includes a second motion platform, wherein The material carrying structure (7) is connected to the second motion platform so as to move along with the movement of the second motion platform.