Laser converter and laser device

Abstract

The embodiment of the utility model provides a laser converter and a laser device. Wherein the laser converter comprises a shell, one side of the shell is provided with a laser input port, and the other side of the shell is provided with a laser output port; the nonlinear crystal is arranged in the shell and is used for converting the laser emitted from the laser input port into laser with a set wavelength; the first collecting lens is arranged in the shell and located on the side, away from the laser input port, of the nonlinear crystal, and the first collecting lens is used for focusing the laser with the set wavelength so that the laser output port can emit the focused laser. The laser converter can convert the laser, so that when the laser converter is applied to the laser device, the laser converter can be used for converting the laser originally emitted by the laser device, the laser originally emitted by the laser device is reserved, the laser device can emit the laser with the set wavelength by means of the laser converter, and the universality is good; and laser with set wavelength can be directly generated without adding a laser generator, so that the structure is simplified.

Description

Technical Field

[0001] The utility model relates to the field of laser equipment, in particular to a laser converter and a laser device. Background Art

[0002] Most current laser marking machines or laser processing equipment can only emit one type of laser, such as infrared laser, green laser, ultraviolet laser, etc., with poor versatility, or contain multiple laser generators to generate multiple lasers at the same time, with a complex structure. Utility Model Content

[0003] Therefore, an object of the present invention is to provide a laser converter and a laser device to solve at least one of the problems existing in the above-mentioned prior art or related art.

[0004] A first aspect of the utility model provides a laser converter, which includes: a shell having a laser input port on one side and a laser output port on the other side; a nonlinear crystal arranged in the shell and used to convert laser light incident from the laser input port into laser light of a set wavelength; a first condenser arranged in the shell and located on a side of the nonlinear crystal away from the laser input port, the first condenser being used to focus the laser light of the set wavelength so that the laser output port can emit the focused laser light.

[0005] The laser converter provided in this embodiment uses a nonlinear crystal to convert the input laser into a laser of a set wavelength, and then emits it after being focused by a first condenser, thereby realizing the conversion of the laser. Therefore, when the laser converter is applied to a laser device, the laser converter can be used to convert the laser originally emitted by the laser device, which not only retains the laser originally emitted by the laser device, but also enables the laser device to emit a laser of a set wavelength with the help of the laser converter. It has good versatility, and does not need to add a laser generator to directly generate laser of a set wavelength, thereby simplifying the structure.

[0006] Moreover, the laser converter of this embodiment takes into account the divergence phenomenon that the laser will appear after being converted by the nonlinear crystal. A first condensing mirror is arranged on the side of the nonlinear crystal away from the laser input port, so that the laser of the set wavelength emitted by the nonlinear crystal will be focused by the first condensing mirror and then emitted from the laser output port, which can compensate for the energy loss in the conversion process, improve the laser utilization rate, and increase the laser output power.

[0007] In addition, the laser converter provided in the above embodiments of the present application may also have the following additional technical features:

[0008] In some embodiments, the laser converter further includes: a first laser guiding mirror, which is disposed in the housing and located between the first focusing mirror and the laser output port, and is used to guide the focused laser of a set wavelength to the laser output port.

[0009] In these embodiments, the first laser guiding mirror is used to guide the laser of the set wavelength focused by the first focusing mirror to the laser output port, which can ensure that the laser of the set wavelength is output at the laser output port, thereby improving the laser utilization rate.

[0010] It should be noted that, in other embodiments, the first condenser can also be used directly to align the laser with the laser output port for emission. However, if the first condenser is used directly to align the laser with the laser output port for emission, the first condenser must not only focus the relatively divergent laser of the set wavelength, but also meet the emission route after focusing. The processing requirements of the first condenser itself are very high, which will increase the processing cost and cause the first condenser to have a low yield. Therefore, the first condenser is used in conjunction with the first laser guide mirror, and the first laser guide mirror is used to guide the focused laser to be emitted along the set path to the laser output port. The first condenser does not need to have a guiding function, and the structure is simple and the processing is convenient.

[0011] In some embodiments, the first condenser is a condenser prism or a convex lens, which has good condensing effect, simple structure and convenient processing.

[0012] In some embodiments, the first laser guiding mirror is a convex lens, which facilitates guiding the laser of a set wavelength to the laser output port.

[0013] In some embodiments, the first laser guiding mirror is detachably mounted in the housing, so as to facilitate replacement of the first laser guiding mirror.

[0014] In some embodiments, the laser converter also includes: a second condensing mirror, which is arranged in the shell and located between the laser input port and the nonlinear crystal, and is used to focus the laser emitted from the laser input port; a second laser guide mirror, which is arranged in the shell and located between the second condensing mirror and the nonlinear crystal, and is used to guide the focused laser to the middle of the nonlinear crystal.

[0015] In these embodiments, the laser input through the laser input port is first focused by the second condensing mirror, then emitted to the second laser guide mirror, and then guided to the nonlinear crystal by the second laser guide mirror. Since there is energy loss during laser conversion, a second condensing mirror is added to first store energy and then convert it to increase the output power.

[0016] In some embodiments, the second condenser is a condenser prism or a convex lens, which has good condensing effect, simple structure and convenient processing.

[0017] In some embodiments, the second laser guiding mirror is a convex lens, which facilitates guiding the laser toward the nonlinear crystal, for example, toward the middle of the nonlinear crystal.

[0018] In some embodiments, the nonlinear crystal can convert infrared laser light incident from the laser input port into ultraviolet laser light.

[0019] Current ultraviolet laser processing equipment uses ultraviolet laser generators to generate ultraviolet lasers. Ultraviolet lasers will generate ionization during the processing process, and will generate a magnetic field during use, which will adsorb surrounding dust into the lens and the optical path, easily leading to problems such as lens ablation and power reduction. Therefore, the current ultraviolet laser processing equipment has a low service life and has high requirements for the use environment. In these embodiments, nonlinear crystals are used to convert infrared lasers into ultraviolet lasers, eliminating the need for ultraviolet laser generators and saving costs. Moreover, the ionization generated during the processing process only has a slight impact on the laser converter, and will not affect the infrared laser generator, which can extend the service life of the laser device, and even if there is a problem with the laser converter, only the laser converter needs to be replaced, saving costs.

[0020] In some embodiments, the nonlinear crystal can convert the infrared laser light injected from the laser input port into a green laser light. Using the nonlinear crystal to convert the infrared laser light into a green laser light eliminates the need for a green laser generator, thus saving costs.

[0021] In some embodiments, a laser input side mark is provided on the side of the housing where the laser input port is located, which is helpful for the user to install the laser converter on the laser device according to the mark, and avoid the laser converter being burned due to reverse installation.

[0022] In some embodiments, an anti-reverse installation structure is provided on the housing, and the anti-reverse installation structure is used for installation and positioning of the laser converter. When installing the laser converter, the anti-reverse installation structure is used for installation. If the laser converter is installed in reverse, the anti-reverse installation structure cannot be connected to the laser device, thereby preventing the laser converter from being burned due to reverse installation.

[0023] The second aspect of the utility model provides a laser device, which includes: an infrared laser generator, on which an infrared laser emission port is provided; a laser converter as in any one of the above technical solutions, the laser converter is detachably connected to the infrared laser generator, and the infrared laser emission port is connected to the laser input port.

[0024] The laser device provided in the embodiment of this aspect has the laser converter of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0025] In addition, the laser device of this embodiment has an infrared laser generator, and can use infrared laser for processing, with high processing efficiency, low requirements for the use environment, and long service life. Of course, infrared laser processing belongs to the category of thermal processing, and the processing effect is achieved by dissolving and volatilizing the material, but there is also a certain quality control risk of thermal deformation, and it requires that the surface of the workpiece material can adsorb the heat source, and it cannot effectively process materials with good light transmittance such as glass. By matching the infrared laser generator with a laser converter, the infrared laser can be converted into a laser of a set wavelength, such as an ultraviolet laser or a green laser, and the converted laser can be used for processing, thereby overcoming the restrictions on the workpiece material and eliminating the quality control risk of thermal deformation. The laser device has good versatility. In addition, the laser converter can be detachably connected to the infrared laser generator, which is convenient for replacing the laser converter, and it is also convenient to disassemble the laser converter, so that the laser device can directly use infrared laser for processing.

[0026] In some embodiments, the infrared laser generator is further provided with a laser galvanometer, the laser converter is provided between the laser galvanometer and the infrared laser emission port, and the laser output port faces the laser galvanometer, so as to facilitate marking with the emitted laser.

[0027] Other aspects and / or advantages of the general inventive concept will be partially set forth in the following description, and some will be clear from the description or may be learned through implementation of the general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects and features of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 A schematic diagram showing the structure of a laser converter according to an embodiment of the present application is shown;

[0030] Figure 2 Shows Figure 1 Schematic cross-sectional view along the AA direction;

[0031] Figure 3 A schematic side view of a laser converter according to an embodiment of the present application is shown;

[0032] Figure 4 Another schematic side view of a laser converter according to an embodiment of the present application is shown;

[0033] Figure 5 A schematic diagram of a laser conversion route of a laser converter according to an embodiment of the present application is shown.

[0034] Figures 1 to 5 Description of Figure Numbers:

[0035] 100 housing; 110 laser input port; 120 laser output port; 130 concave-convex heat dissipation surface; 140 laser input side logo; 150 anti-reverse installation structure;

[0036] 200 nonlinear crystals;

[0037] 300 first condenser;

[0038] 400 a first laser guiding mirror;

[0039] 500 second condenser;

[0040] 600 second laser guide mirror. DETAILED DESCRIPTION

[0041] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0042] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0043] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0044] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

[0045] In the specification, when an element such as a layer, a region or a substrate is described as being “on”, “connected to” or “coupled to” another element, the element may be directly “on”, “connected to” or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to” or “directly coupled to” another element, other elements may not be present therebetween.

[0046] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof. The term "plurality" represents any number of two and more than two.

[0047] The definitions of directional terms such as "above", "below", "top" and "bottom" in this application are based on the orientation of the product in normal use, unless otherwise specified.

[0048] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant field and the present invention, and should not be interpreted in an idealized or overly formal way.

[0049] Laser marking machines or laser processing equipment are usually distinguished by light source and wavelength. The light source is a laser of different intensities generated by a laser generator, such as carbon dioxide, optical fiber, etc. The wavelengths are mainly infrared laser, green laser, ultraviolet laser, etc. Laser marking machines or laser processing equipment usually choose different combinations of light sources and wavelengths according to their uses, such as carbon dioxide ultraviolet laser, optical fiber infrared laser, etc.

[0050] Infrared laser processing equipment belongs to the category of thermal processing. It achieves the processing effect by dissolving and volatilizing the material. There is a quality control risk of thermal deformation. In addition, it requires the surface of the workpiece material to be able to absorb the heat source. It cannot effectively process materials with good light transmittance such as glass. Of course, high processing efficiency, low requirements for the use environment, and long service life are the advantages of infrared laser processing equipment.

[0051] UV laser processing equipment belongs to the category of cold processing. There are basically no restrictions on the material of the workpiece. It can produce molecular separation on any surface, without the quality risk of thermal deformation, good safety, and high processing quality. However, ionization will occur during the UV processing process, and a magnetic field will be generated during use, which will adsorb the surrounding dust into the lens and optical path, easily leading to problems such as lens ablation and power reduction. Therefore, UV laser processing equipment has high requirements for the use environment, and its service life is lower than that of infrared processing equipment. The service life of infrared laser processing equipment is basically 100,000 hours, while the service life of UV laser processing equipment with the same power is basically 20,000 hours, which is a big difference between the two. In addition, UV laser processing equipment has a high unit price and a high failure rate. At the same time, UV laser processing equipment has higher requirements for the production and assembly environment than infrared laser processing equipment.

[0052] Based on this, the first embodiment of the present application proposes a laser converter. The laser converter converts infrared laser into ultraviolet laser and is used in conjunction with a laser device with an infrared laser generator. In this way, the corresponding functions of the original laser device are retained when the two are separated, and when the two cooperate with each other, the laser converter can be used to convert the infrared laser into ultraviolet laser, overcoming the original laser device's requirements for the surface material of the workpiece. In addition, during ultraviolet laser processing, the ionizing magnetic field is isolated outside the main device of the laser device, away from the infrared laser generator, solving the problem of short service life of ultraviolet laser processing equipment in related technologies. In addition, the laser device cooperates with the laser converter to achieve flexible switching between hot processing and cold processing for the workpiece, and the processing effect is good.

[0053] The following will be combined Figures 1 to 5 The laser converter provided in this embodiment is introduced. Of course, those skilled in the art should know that the laser converter can also convert infrared laser into other lasers, such as green laser, or convert other lasers into ultraviolet laser, green laser, etc., and be used in conjunction with a laser device with a corresponding laser generator, which will not be listed in detail here.

[0054] like Figure 1 and Figure 2 As shown, the laser converter includes a housing 100 , a nonlinear crystal 200 disposed in the housing 100 , and a first condensing lens 300 .

[0055] The housing 100 has a laser input port 110 on one side and a laser output port 120 on the other side. The housing 100 encloses the nonlinear crystal 200 and the first condenser 300 therein, thereby preventing dust and other impurities from interfering with the nonlinear crystal 200 and the first condenser 300.

[0056] The nonlinear crystal 200 is used to convert the infrared laser light input from the laser input port 110 into ultraviolet laser light.

[0057] The first condenser 300 is located at a side of the nonlinear crystal 200 away from the laser input port 110 . The first condenser 300 is used to focus the laser light of a set wavelength so that the laser output port 120 can emit the focused laser light.

[0058] The laser converter provided in this embodiment converts the input infrared laser into ultraviolet laser by using the nonlinear crystal 200, and then emits the ultraviolet laser after being focused by the first condenser 300, so as to realize the conversion of laser. Therefore, when the laser converter is applied to a laser device with an infrared laser generator, the original function of the laser device to emit infrared laser can be retained, and the laser device can emit ultraviolet laser with the help of the laser converter, thereby improving the versatility of the laser device, and there is no need to add an ultraviolet laser generator, simplifying the structure and saving costs.

[0059] Moreover, since the laser will diverge after being converted by the nonlinear crystal 200, resulting in energy loss, a first condenser 300 is arranged on the side of the nonlinear crystal 200 away from the laser input port 110, so that the laser of a set wavelength emitted by the nonlinear crystal 200 can be focused by the first condenser 300 first and then emitted from the laser output port 120, which can compensate for the energy loss in the conversion process, improve the laser utilization rate, and increase the laser output power.

[0060] In specific applications, nonlinear optical crystals, i.e., nonlinear crystals 200 in this embodiment, are crystals whose optical properties depend on the optical part of the light intensity, resulting in a phenomenon of deviation from the linear optical law. The infrared laser (1064nm) of the laser is emitted in a band shape when it is emitted by the generator. The wavelength is changed by adding the nonlinear crystal 200 in the laser emission path (the amount of adjustment of the wavelength of the light is determined according to the thickness of the nonlinear crystal 200). After being converted to the expected set wavelength, it is refocused by the first condenser 300 (ultraviolet laser generally uses 355nm) to compensate for the energy loss in the conversion process, and then focused to the surface of the workpiece to be processed by the first laser guide mirror 400 for processing.

[0061] In a specific example, if the first condenser 300 is not used for focusing, but the ultraviolet laser converted by the nonlinear crystal 200 is directly emitted from the laser output port 120, since the light emitted by the nonlinear crystal 200 is relatively scattered, the utilization rate is low, and can only reach about 12%. However, this embodiment uses the first condenser 300 to focus and then output from the laser output port 120, which can increase the laser utilization rate to about 30%, increase the laser output power, and thus help improve the processing or marking effect.

[0062] As an example, the first condenser 300 is a condenser prism or a convex lens, which has a good condensing effect, a simple structure, and is easy to manufacture.

[0063] To improve the utilization rate of laser, further, in some embodiments, as Figure 2 and Figure 5 As shown, the laser converter also includes: a first laser guide mirror 400, which is arranged in the housing 100 and located between the first focusing mirror 300 and the laser output port 120, and the first laser guide mirror 400 is used to guide the focused laser of the set wavelength to the laser output port 120.

[0064] In these embodiments, the first laser guiding mirror 400 is used to guide the laser of the set wavelength focused by the first focusing mirror 300 to the laser output port 120, which can ensure that the laser of the set wavelength is outputted toward the laser output port 120, thereby improving the laser utilization rate.

[0065] It should be noted that, in other embodiments, the first condenser 300 may be directly used to align the laser with the laser output port 120 for emission. However, if the first condenser 300 is directly used to align the laser with the laser output port 120 for emission, the first condenser 300 must not only focus the relatively divergent laser of the set wavelength, but also meet the emission route after focusing, which places high demands on the processing of the first condenser 300 itself, increases the processing cost, and causes a low yield of the first condenser 300. Therefore, the first condenser 300 is used in conjunction with the first laser guide mirror 400, and the first laser guide mirror 400 is used to guide the focused laser to be emitted toward the laser output port 120 along the set path, without the first condenser 300 having the guiding function, and the structure is simple and the processing is convenient.

[0066] As an example, the first laser guiding mirror 400 is a convex lens, which facilitates guiding the laser light of a set wavelength toward the laser output port 120 .

[0067] Furthermore, the first laser guide mirror 400 is detachably mounted in the housing 100 to facilitate replacement of the first laser guide mirror 400. In this way, even if surrounding dust is adsorbed onto the first laser guide mirror 400 during ultraviolet laser processing, the first laser guide mirror 400 can be replaced. In addition, the angle or focus of laser emission can be adjusted by replacing the first laser guide mirror 400 with different parameters, thereby meeting different processing requirements.

[0068] Of course, the housing 100 may have an openable cover, so that the housing 100 can be opened to facilitate replacement of components inside the housing 100. Of course, in other embodiments, the housing 100 may not be opened to ensure sealing.

[0069] To increase the laser output power, further, in some embodiments, as Figure 2 and Figure 5As shown, the laser converter further includes a second condenser 500 , which is disposed in the housing 100 and located between the laser input port 110 and the nonlinear crystal 200 . The second condenser 500 is used to focus the laser light incident from the laser input port 110 .

[0070] In these embodiments, the laser input through the laser input port 110 is first focused by the second condenser 500 and then converted by the nonlinear crystal 200. Since there is energy loss during laser conversion, adding a second condenser 500 to first store energy and then convert it can increase the output power.

[0071] In a specific example, the infrared laser enters the laser input port 110 in parallel with a power of 50W, and after being focused by the second condenser 500, it can be increased to 56W, and then converted by the nonlinear crystal 200, and after being focused by the first condenser 300, a 12W laser can be output. If the second condenser 500 is not provided, only about 10W of laser can be output. Therefore, the provision of the second laser mirror can reduce the loss and increase the output power.

[0072] As an example, the second condenser 500 is a condenser prism or a convex lens, which has a good condensing effect, a simple structure, and is easy to manufacture.

[0073] Furthermore, if Figure 2 and Figure 5 As shown, the laser converter further includes a second laser guiding mirror 600, which is disposed in the housing 100 and between the second condensing mirror 500 and the nonlinear crystal 200. The second laser guiding mirror 600 is used to guide the focused laser to the middle of the nonlinear crystal 200. The second laser guiding mirror 600 can concentrate the laser so that the laser passes through the middle of the nonlinear crystal 200 and is converted, thereby improving the utilization rate of the laser.

[0074] As an example, the second laser guiding mirror 600 is a convex lens, which facilitates guiding the laser toward the nonlinear crystal 200 .

[0075] Furthermore, in some embodiments, Figure 1 and Figure 3 As shown, a laser input side mark 140 is provided on the side of the housing 100 where the laser input port 110 is located, which is helpful for the user to install the laser converter on the laser device according to the mark, and avoid the laser converter being burned due to reverse installation.

[0076] As an example, the laser input side mark 140 is a sticker or an engraved mark, or may be a protruding mark on the housing 100 .

[0077] Furthermore, if Figure 1 , Figure 3 and Figure 4As shown, the housing 100 is provided with an anti-reverse installation structure 150, which is used for the installation and positioning of the laser converter. When installing the laser converter, the anti-reverse installation structure 150 is used for installation. If the laser converter is installed in reverse, the anti-reverse installation structure 150 cannot be connected to the laser device, which can prevent the laser converter from being burned due to reverse installation.

[0078] In a specific example, Figure 1 , Figure 3 and Figure 4 As shown, the anti-reverse installation structure 150 includes a plurality of protrusions, each of which is provided with a mounting hole for inserting a bolt (not shown in the figure), and the plurality of protrusions are distributed on opposite sides of the housing 100. When the laser converter is mounted on the laser device, the bolt passes through the connection structure on the laser device and is inserted into the mounting hole on the anti-reverse installation structure 150. Here, the protrusion spacing on one side of the housing 100 can be designed to be different from the protrusion spacing on the other side of the housing 100. Therefore, if the laser converter is mounted reversely, the bolt cannot be inserted into the corresponding mounting hole, thereby preventing the user from mounting it reversely.

[0079] Of course, there can be many specific structures and installation positions of the anti-reverse installation structure 150, which need to match the connection structure on the laser device, and are not listed here one by one.

[0080] Furthermore, in some embodiments, Figure 1 and Figure 2 As shown, the surface of the housing 100 is provided with a concave-convex heat dissipation surface 130 for heat dissipation. The concave-convex heat dissipation surface 130 can be made of metal, and the housing 100 can also be a metal housing 100, such as an aluminum-magnesium alloy housing 100, for convenient heat dissipation.

[0081] Here, it is considered that if the nonlinear crystal 200 is used to convert infrared laser, and the temperature of infrared laser is relatively high, therefore, the surface of the housing 100 is provided with a heat dissipation surface to avoid damage caused by excessive temperature inside the housing 100.

[0082] Furthermore, in some embodiments, the laser converter further includes a first protective mirror (not shown in the figure) and a second protective mirror (not shown in the figure), the first protective mirror is arranged at the laser input port 110, and the second protective mirror is arranged at the laser output port 120. The laser is input through the first protective mirror, and the laser of the set wavelength is output through the second protective mirror. The first protective mirror and the second protective mirror can seal the laser input port 110 and the laser output port 120 to prevent dust and other impurities from entering the laser converter.

[0083] As an example, the first protective mirror and the second protective mirror are high-transmittance mirrors.

[0084] The laser converter provided in the embodiment of the present application can also convert infrared laser into other lasers, such as green laser. In this case, the nonlinear crystal 200 converts the infrared laser injected from the laser input port 110 into green laser.

[0085] The second aspect of the utility model provides a laser device, which includes: an infrared laser generator (not shown in the figure), on which an infrared laser emission port is provided; a laser converter such as any one of the above embodiments, which is detachably connected to the infrared laser generator, and the infrared laser emission port is connected to the laser input port 110.

[0086] The laser device provided in the embodiment of this aspect has the laser converter of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0087] In addition, the laser device of this embodiment has an infrared laser generator, and can use infrared laser for processing, with high processing efficiency, low requirements for the use environment, and long service life. Of course, infrared laser processing belongs to the category of thermal processing, and the processing effect is achieved by dissolving and volatilizing the material, but there is also a certain quality control risk of thermal deformation, and it requires that the surface of the workpiece material can adsorb the heat source, and it cannot effectively process materials with good light transmittance such as glass. By matching the infrared laser generator with a laser converter, the infrared laser can be converted into a laser of a set wavelength, such as an ultraviolet laser or a green laser, and the converted laser is used for processing, which can overcome the restrictions on the workpiece material and eliminate the quality control risk of thermal deformation. The laser device has good versatility. In addition, the laser converter can be detachably connected to the infrared laser generator, which is convenient for replacing the laser converter, and it is also convenient to disassemble the laser converter, so that the laser device can directly use infrared laser for processing.

[0088] Furthermore, the laser converter can convert infrared laser into ultraviolet laser. The infrared thermal laser is converted into ultraviolet cold laser processing through an external device, and the adsorption problem of the ionized magnetic field generated by the reaction of ultraviolet laser with air impurities is transferred to the laser converter, which can increase the service life and function of the whole machine. Here, the infrared laser is converted after it is generated, and the problem of dust adsorption by the optical path and laser is transferred to the output end of the laser converter, which is isolated from the host device and the optical path, avoiding the impact on the whole machine and the optical path, and at the same time improving the service life of the laser device. In addition, the maintenance plan is simplified. After the external laser converter is replaced, the ultraviolet laser can continue to be generated, and the laser converter can also be changed to generate green laser. The maintenance is convenient and there is no need to repair the whole machine in a 100,000-level workshop. Moreover, after removing the laser converter, it can be restored to an infrared laser processing device. Moreover, setting a long-life light source as the main light source and isolating the ultraviolet ionized magnetic field that produces an impact externally can reduce the difficulty of selecting the laser device and the difficulty of subsequent maintenance (only the external wavelength conversion device, that is, the laser converter, needs to be repaired), and at the same time increase the range of workpieces to be processed.

[0089] Furthermore, the laser device can be equipped with a variety of laser generators, and one can be selected and installed to achieve processing using different types of lasers. For example, an infrared laser marking machine can be switched to ultraviolet laser or green laser for processing using different laser converters, which can comprehensively improve the overall service life and use value of the laser marking machine.

[0090] Furthermore, in some embodiments, the laser device is a laser marking machine, the infrared laser generator is further provided with a laser galvanometer, the laser converter is provided between the laser galvanometer and the infrared laser emission port, and the laser output port 120 faces the laser galvanometer, so as to facilitate marking with the emitted laser.

[0091] In other embodiments, the laser device is a laser processing and engraving device. In this case, the laser converter can be directly installed on the upper part of the processing head to directly process the workpiece.

[0092] The laser device provided in this embodiment can increase the service life of the host device because the laser converter can be used as a detachable external device. Moreover, it realizes the non-destructive upgrade of existing infrared processing equipment. Moreover, it can improve the application of the laser device, reduce the purchase cost of the laser device, and can be upgraded in stages.

[0093] Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A laser converter, characterized in that: The laser converter comprises: A housing (100), wherein one side of the housing (100) has a laser input port (110) and the other side of the housing (100) has a laser output port (120); A nonlinear crystal (200), arranged in the housing (100), used for converting laser light incident from the laser input port (110) into laser light of a set wavelength; A first condenser (300) is arranged in the housing (100) and is located on a side of the nonlinear crystal (200) away from the laser input port (110), and the first condenser (300) is used to focus the laser light of the set wavelength so that the laser output port (120) emits the focused laser light.

2. The laser converter according to claim 1, characterized in that The laser converter further comprises: The first laser guiding mirror (400) is arranged in the housing (100) and located between the first condensing mirror (300) and the laser output port (120), and is used for guiding the focused laser of the set wavelength to the laser output port (120).

3. The laser converter according to claim 2, characterized in that The first condensing mirror (300) is a condensing prism or a convex lens, and / or the first laser guiding mirror (400) is a convex lens.

4. The laser converter according to claim 2, characterized in that: The first laser guiding mirror (400) is detachably mounted in the housing (100).

5. The laser converter according to any one of claims 1 to 4, characterized in that: The laser converter further comprises: A second condenser lens (500) is disposed in the housing (100) and located between the laser input port (110) and the nonlinear crystal (200), and is used to focus the laser light incident from the laser input port (110); The second laser guiding mirror (600) is arranged in the housing (100) and located between the second condensing mirror (500) and the nonlinear crystal (200), and is used to guide the focused laser to the middle of the nonlinear crystal (200).

6. The laser converter according to claim 5, characterized in that The second condensing mirror (500) is a condensing prism or a convex lens, and / or the second laser guiding mirror (600) is a convex lens.

7. The laser converter according to any one of claims 1 to 4, characterized in that: The nonlinear crystal (200) is capable of converting infrared laser light injected from the laser input port (110) into ultraviolet laser light; or The nonlinear crystal (200) can convert infrared laser light injected from the laser input port (110) into green laser light.

8. The laser converter according to any one of claims 1 to 4, characterized in that: A laser input side mark (140) is provided on the side of the housing (100) where the laser input port (110) is located; and / or An anti-reverse installation structure (150) is provided on the housing (100), and the anti-reverse installation structure (150) is used for installation and positioning of the laser converter.

9. A laser device, characterized in that: The laser device comprises: An infrared laser generator, wherein the infrared laser generator is provided with an infrared laser emitting port; The laser converter according to any one of claims 1 to 8, wherein the laser converter is detachably connected to the infrared laser generator, and the infrared laser emission port is connected to the laser input port (110).

10. The laser device according to claim 9, characterized in that The infrared laser generator is also provided with a laser galvanometer, the laser converter is arranged between the laser galvanometer and the infrared laser emission port, and the laser output port (120) faces the laser galvanometer.

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