Dual-wavelength laser focal length difference compensation device and method, medium and equipment

Abstract

The embodiment of the invention discloses a dual-wavelength laser focal length difference compensation device and method, a medium and equipment. The device comprises a first laser used for emitting first wavelength laser; the second laser is used for emitting second wavelength laser; the confocal assembly coincides with the optical axis of the first laser device and is used for adjusting the divergence angle of the first wavelength laser and focusing the first wavelength laser and the second wavelength laser to the same focus position, it is guaranteed that the double-wavelength laser can be accurately focused, and under the condition that the distance of the laser devices is not changed, the lasers of the two wavelengths are in the optimal engraving and cutting state at the same time; performance and precision of the laser are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser engraving, and in particular to a dual-wavelength laser focal length difference compensation device, method, medium and equipment. Background Art

[0002] When the dual-wavelength lasers currently available on the market for engraving or cutting emit lasers of two different wavelengths, the optimal focal lengths of the two wavelengths of laser light may be different due to axial chromatic aberration of the focusing lens or deviation in the divergence angles of the two laser output beams.

[0003] The most common compensation methods currently rely on mechanical adjustment, such as adjusting the original focal length of the laser, but this method is bulky, inefficient, and has limited adjustment accuracy. In addition, the method of using optical elements for focal length compensation also has limitations, such as the need for multiple complex devices and precise optical design, high cost, and complex operation, which is not convenient for practical application. Summary of the invention

[0004] Based on this, it is necessary to propose a dual-wavelength laser focal length difference compensation device, method, medium and equipment to address the above problems.

[0005] A dual-wavelength laser focal length difference compensation device, characterized in that the device comprises:

[0006] The first laser is used to emit laser light of a first wavelength.

[0007] The second laser is used to emit laser light of a second wavelength.

[0008] The confocal component coincides with the optical axis of the first laser and is used to adjust the divergence angle of the first wavelength laser and focus the first wavelength laser and the second wavelength laser to the same focal position.

[0009] The confocal component includes: a concave lens and a convex lens, the optical axis of the concave lens coincides with the optical axis of the convex lens, and the divergence angle of the first wavelength laser is changed by adjusting the principal point distance between the convex lens and the concave lens, so that the first wavelength laser and the second wavelength laser are focused to the same focal position.

[0010] The device further comprises: a wavelength combining element and a focusing lens sequentially arranged along the optical path of the first wavelength laser,

[0011] The wavelength combining element is used to combine the first wavelength laser and the second wavelength laser adjusted by the confocal component into a composite laser beam.

[0012] The focusing mirror is used to focus the composite laser to a predetermined focal position.

[0013] A dual-wavelength laser focal length difference compensation method, the method comprising:

[0014] A first wavelength laser is emitted.

[0015] Emitting a second wavelength laser.

[0016] The divergence angle of the first wavelength laser is adjusted to focus the first wavelength laser and the second wavelength laser to the same focal position.

[0017] The step of adjusting the divergence angle of the first wavelength laser to focus the first wavelength laser and the second wavelength laser to the same focal position specifically includes:

[0018] The divergence angle of the first wavelength laser is changed by adjusting the principal point distance between the convex lens and the concave lens.

[0019] The adjusted first wavelength laser and second wavelength laser are combined into a composite laser beam.

[0020] The composite laser is focused to a predetermined focal position.

[0021] The step of adjusting the distance between the convex lens and the concave lens to change the divergence angle of the laser with the first wavelength specifically includes:

[0022] The focal length difference formula of the dual-wavelength laser is determined according to the principal point distance between the convex lens and the concave lens, the focal length of the convex lens and the focal length of the concave lens.

[0023] If the focal length difference in the focal length difference formula is zero, a focal length difference compensation formula is determined.

[0024] The compensation distance is determined by the focal length difference compensation formula.

[0025] The divergence angle of the first wavelength laser is changed according to the compensation distance.

[0026] Wherein, if the focal length difference in the focal length difference formula is zero, determining the focal length difference compensation formula specifically includes:

[0027] The focal length difference compensation formula is:

[0028]

[0029] Wherein, G[F(λ1)] is the focal length of the first laser, G[F(λ2)] is the focal length of the second laser, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, d is the principal point distance between the convex lens and the concave lens, d2 is the principal point distance between the combination of the convex lens and the concave lens and the focusing mirror, g1 is the amount by which the focal position of the first laser deviates from the standard value after focusing due to production errors, and g2 is the amount by which the focal position of the second laser deviates from the standard value after focusing due to production errors.

[0030] Wherein, changing the divergence angle of the first wavelength laser according to the compensation distance specifically includes:

[0031] Determine that the compensation distance of the principal point between the convex lens and the concave lens satisfies f1+f2=d, where f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, and d is the principal point distance between the convex lens and the concave lens.

[0032] By adjusting d<f1+f2, the divergence angle of the laser with the first wavelength is enlarged.

[0033] By adjusting d>f1+f2, the divergence angle of the laser with the first wavelength decreases.

[0034] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the steps of the method described above.

[0035] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0036] The embodiments of the present invention have the following beneficial effects:

[0037] The present invention adjusts the principal point distance between the concave lens and the convex lens to change the divergence angle of the first wavelength laser, so that the first wavelength laser and the second wavelength laser are focused to the same focal position, thereby achieving precise adjustment of the divergence angle of the first wavelength laser, making the focal lengths of the two wavelength lasers the same, ensuring that the dual-wavelength lasers can be precisely focused, and when the laser distance remains unchanged, the two wavelength lasers are simultaneously in the best engraving and cutting state, thereby improving the performance and precision of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] in:

[0040] Figure 1 A schematic structural diagram of an embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention;

[0041] Figure 2 A schematic structural diagram of another embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention;

[0042] Figure 3 A schematic structural diagram of another embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention;

[0043] Figure 4 A schematic structural diagram of another embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention;

[0044] Figure 5 A schematic flow chart of an embodiment of a dual-wavelength laser focal length difference compensation method provided by the present invention;

[0045] Figure 6 A schematic flow chart of another embodiment of a dual-wavelength laser focal length difference compensation method provided by the present invention;

[0046] Figure 7 A schematic structural diagram of an embodiment of the device provided by the present invention;

[0047] Figure 8 A schematic structural diagram of an embodiment of a storage medium provided by the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1 As shown, Figure 1 The present invention provides a schematic diagram of a dual-wavelength laser focal length difference compensation device according to an embodiment of the present invention. A dual-wavelength laser focal length difference compensation device, characterized in that the device comprises:

[0050] The first laser 1 is used to emit laser light of a first wavelength.

[0051] The second laser 2 is used to emit laser light of a second wavelength.

[0052] The confocal component 3 coincides with the optical axis of the first laser 1 and is used to adjust the divergence angle of the first wavelength laser and focus the first wavelength laser and the second wavelength laser to the same focal position.

[0053] In a specific implementation scenario, the first laser 1 emits a first wavelength laser, which passes through a confocal component 3 whose optical axis coincides with the axis of the beam of the first laser 1, so as to adjust the divergence angle of the first wavelength laser and focus the first wavelength laser and the second wavelength laser to the same focal position. When the first wavelength laser passes through the center of the lens of the confocal component 3 along the optical axis, the propagation direction of the first wavelength laser does not change. When the distance remains unchanged, the first wavelength laser and the second wavelength laser of the two wavelengths can be in the best engraving and cutting state at the same time. Among them, the first laser 1 and the second laser 2 are parallel light lasers with small divergence angles, which can be either continuous lasers or pulsed lasers.

[0054] It should be noted that the wavelength of the first laser 1 includes 450 nm.

[0055] From the above description, it can be known that the present invention changes the divergence angle of the first wavelength laser by adjusting the principal point distance between the concave lens and the convex lens, so that the first wavelength laser and the second wavelength laser are focused to the same focal position, thereby achieving precise adjustment of the divergence angle of the first wavelength laser, making the focal lengths of the two wavelength lasers the same, ensuring that the dual-wavelength laser can be precisely focused, and when the laser distance remains unchanged, the two wavelength lasers are in the optimal engraving and cutting state at the same time, thereby improving the performance and accuracy of the laser.

[0056] like Figure 2 As shown, Figure 2 The schematic diagram of another embodiment of the dual-wavelength laser focal length difference compensation device provided by the present invention. The confocal component 3 includes: a concave lens 31 and a convex lens 32, the optical axis of the concave lens 31 coincides with the optical axis of the convex lens 32, and the divergence angle of the first wavelength laser is changed by adjusting the principal point distance between the convex lens 32 and the concave lens 31, so that the first wavelength laser and the second wavelength laser are focused to the same focal position.

[0057] In one implementation scenario, the first wavelength laser emitted by the first laser 1 sequentially passes through a concave lens 31 and a convex lens 32 whose optical axes coincide with the axis of the beam of the first laser 1, so as to adjust the divergence angle of the first wavelength laser. Specifically, the convex lens 32 includes a spherical convex lens 32 with a positive focal length corresponding to the focal length of the wavelength of the first laser 1 f1, and the concave lens 31 includes a spherical concave lens 31 with a negative focal length corresponding to the focal length of the wavelength of the first laser 1 f2. The distance between the principal points of the two lenses is d. By adjusting the principal point distance d between the concave lens 31 and the convex lens 32, the divergence angle of the first wavelength laser is changed, and the first wavelength laser and the second wavelength laser are focused to the same focal position. When the compensation distance d of the principal points of the concave lens 31 and the convex lens 32 satisfies the initial position of f1+f2=d, if d<f1+f2 is adjusted, the first wavelength laser changes in the direction of expanding the divergence angle, and if d>f1+f2 is adjusted, the first wavelength laser changes in the direction of reducing the divergence angle. By Figure 2 By adjusting the confocal component 3 as shown, the diameter of the laser light of the first wavelength will be expanded to a certain extent.

[0058] In another implementation scenario, such as Figure 3 As shown, Figure 3 A schematic diagram of the structure of another embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention. The first wavelength laser emitted by the first laser 1 passes through a convex lens 32 and a concave lens 31 whose optical axis coincides with the axis of the light beam of the first laser 1 in sequence, so as to adjust the divergence angle of the first wavelength laser. Specifically, the convex lens 32 includes a spherical convex lens 32 with a positive focal length corresponding to the focal length of the wavelength of the first laser 1, which is f1, and the concave lens 31 includes a spherical concave lens 31 with a negative focal length corresponding to the focal length of the wavelength of the first laser 1, which is f2, and the distance between the principal points of the two lenses is d. By adjusting the principal point distance d between the convex lens 32 and the concave lens 31, the divergence angle of the first wavelength laser is changed, and the first wavelength laser and the second wavelength laser are focused to the same focal position.

[0059] In actual applications, when the distance d between the principal points of the convex lens 32 and the concave lens 31 satisfies the initial position of f1+f2=d, the combined focal length is infinite, and the ideal first wavelength laser can remain parallel along the optical axis after passing through the two lenses. If d is adjusted to < f1+f2, the divergence angle of the first wavelength laser will be enlarged; if d is adjusted to > f1+f2, the divergence angle of the first wavelength laser will be reduced. Figure 3 By adjusting the confocal component 3 as shown, the diameter of the laser light of the first wavelength can be reduced to a certain extent.

[0060] Among them, when the wavelength of the first laser 1 is 450nm, the present invention selects the convex lens 32 as follows: convex surface R23.193mm, CT=1.8mm, and a plano-convex spherical mirror made of SF11, and selects the concave lens 31 as a plano-concave spherical mirror with a concave surface R15.962mm, CT=1.5mm, and a material of SF11.

[0061] like Figure 4 As shown, Figure 4 A schematic diagram of another embodiment of a dual-wavelength laser focal length difference compensation device provided by the present invention. A dual-wavelength laser focal length difference compensation device also includes: a wavelength combining element 4 and a focusing mirror 5 arranged in sequence along the optical path of the first wavelength laser.

[0062] The wavelength combining element 4 is used to combine the first wavelength laser and the second wavelength laser adjusted by the confocal component 3 into a composite laser beam.

[0063] The focusing lens 5 is used to focus the composite laser to a predetermined focal position.

[0064] In a specific implementation scenario, the confocal component 3 is composed of a convex lens 32 and a concave lens 31, and the principal point distance d between the convex lens 32 and the concave lens 31 is maintained at the initial position, d = 7mm. When the first wavelength laser passes through the concave lens 31 and then the convex lens 32, the propagation direction of the light beam does not change. After passing through the wavelength combining element 4, the first wavelength laser and the second wavelength laser after passing through the confocal component 3 are combined into a composite laser beam. At this time, the composite laser is focused onto a beam analyzer or other detector through a focusing lens 5. The beam analyzer or other detector can be moved so that the diameter of the second wavelength laser measured by the detector is minimized, that is, the detection surface is located at the optimal focal position of the second wavelength laser.

[0065] Furthermore, the principal point distance d between the convex lens 32 and the concave lens 31 is adjusted so that the light spot of the first wavelength laser measured on the detector is minimized, and the lens position is fixed.

[0066] like Figure 5 As shown, Figure 5 A schematic diagram of a flow chart of an embodiment of a dual-wavelength laser focal length difference compensation method provided by the present invention. A dual-wavelength laser focal length difference compensation method, the method comprising:

[0067] S101: emitting laser light of a first wavelength.

[0068] S102: Emitting laser light of a second wavelength.

[0069] S103: adjusting the divergence angle of the first wavelength laser to focus the first wavelength laser and the second wavelength laser to the same focal position.

[0070] In an implementation scenario, refer to Figure 4 , the first wavelength laser is emitted by the first laser 1, and the first wavelength laser passes through the convex lens 32 and the concave lens 31 whose optical axis coincides with the axis of the beam of the first laser 1 in turn, so as to adjust the divergence angle of the first wavelength laser. Specifically, the focal difference formula of the dual-wavelength laser is determined according to the principal point distance between the convex lens 32 and the concave lens 31, the focal length of the convex lens 32 and the focal length of the concave lens 31; if the focal difference in the focal difference formula is zero, the focal difference compensation formula is determined; the compensation distance is determined by the focal difference compensation formula; the divergence angle of the first wavelength laser is changed according to the compensation distance, and the first wavelength laser and the second wavelength laser are focused to the same focal position. After passing through the wavelength combining element 4, the first wavelength laser and the second wavelength laser after passing through the confocal component 3 are combined into a composite laser. Further, the composite laser is focused to a predetermined focal position by the focusing lens 5.

[0071] like Figure 6 As shown, Figure 6 A schematic flow chart of another embodiment of a dual-wavelength laser focal length difference compensation method provided by the present invention. A dual-wavelength laser focal length difference compensation method, the method comprising:

[0072] S201: Emitting laser light of a first wavelength.

[0073] S202: Emitting laser light of a second wavelength.

[0074] S203: Determine a focal length difference formula of the dual-wavelength laser according to the principal point distance between the convex lens and the concave lens, the focal length of the convex lens, and the focal length of the concave lens.

[0075] In a specific implementation scenario, refer to Figure 4 , the focal length of the convex lens 32 corresponding to the first wavelength laser is f1, the focal length of the concave lens 31 corresponding to the first wavelength laser is f2, and the principal point distance between the convex lens 32 and the concave lens 31 is d, then the combined focal length of the convex lens 32 and the concave lens 31 is:

[0076]

[0077] Among them, f' is the combined focal length of the convex lens and the concave lens, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, and d is the principal point distance between the convex lens and the concave lens.

[0078] Furthermore, the distance between the principal point of the focusing mirror 5 and the principal point of the confocal component 3 (convex lens 32 and concave lens 31) is , then for the first laser 1, the combined focal length of the confocal component 3 and the focusing mirror 5 is:

[0079]

[0080] Wherein, G[F(λ1)] is the focal length of the first laser, G[F(λ2)] is the focal length of the second laser, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, d is the principal point distance between the convex lens and the concave lens, d2 is the principal point distance between the combination of the convex lens and the concave lens and the focusing mirror, g1 is the amount by which the focal position of the first laser deviates from the standard value after focusing due to production errors, and g2 is the amount by which the focal position of the second laser deviates from the standard value after focusing due to production errors.

[0081] The actual focal length difference at this time is:

[0082]

[0083] Where Δf′ 实 is the actual focal length difference of the dual-wavelength laser, G[F(λ1)] is the focal length of the first laser, G[F(λ2)] is the focal length of the second laser, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, d is the principal point distance between the convex lens and the concave lens, d2 is the principal point distance between the combination of the convex lens and the concave lens and the focusing mirror, g1 is the amount by which the focal position of the first laser deviates from the standard value after focusing due to production errors, and g2 is the amount by which the focal position of the second laser deviates from the standard value after focusing due to production errors.

[0084] S204: If the focal length difference in the focal length difference formula is zero, determine a focal length difference compensation formula.

[0085] In a specific implementation scenario, if the focal length difference Δf′ in the focal length difference formula 实 is zero, then the focal length difference compensation formula is:

[0086]

[0087] Wherein, G[F(λ1)] is the focal length of the first laser, G[F(λ2)] is the focal length of the second laser, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, d is the principal point distance between the convex lens and the concave lens, d2 is the principal point distance between the combination of the convex lens and the concave lens and the focusing mirror, g1 is the amount by which the focal position of the first laser deviates from the standard value after focusing due to production errors, and g2 is the amount by which the focal position of the second laser deviates from the standard value after focusing due to production errors.

[0088] S205: Determine the compensation distance using a focal length difference compensation formula.

[0089] In a specific implementation scenario, according to the focal length difference compensation formula and known parameters, for any d2, a solution satisfying Δf′ can be obtained. 实= 0 as the compensation distance. At this time, the focal length difference of the dual-wavelength laser caused by the dispersion of the focusing mirror and the production error of the dual-wavelength laser is compensated, and the distance from the waist of the two beams to the focusing mirror is the same, which satisfies the optimal engraving and cutting state of the two wavelength lasers at the same time.

[0090] S206: Changing the divergence angle of the first wavelength laser according to the compensation distance.

[0091] In a specific implementation scenario, it is determined that the first wavelength laser emitted by the first laser 1 passes through the convex lens 32 and the concave lens 31 whose optical axes coincide with the axis of the light beam of the first laser 1 in sequence. When the distance d between the principal points of the convex lens 32 and the concave lens 31 satisfies the initial position of f1+f2=d, d is adjusted to be less than f1+f2, and the divergence angle of the first wavelength laser is enlarged; when d is adjusted to be greater than f1+f2, the divergence angle of the first wavelength laser is reduced.

[0092] In another specific implementation scenario, it is determined that the first wavelength laser emitted by the first laser 1 passes through the concave lens 31 and the convex lens 32 whose optical axes coincide with the axis of the light beam of the first laser 1 in sequence. When the compensation distance d of the principal points of the concave lens 31 and the convex lens 32 satisfies the initial position of f1+f2=d, by adjusting d<f1+f2, the first wavelength laser changes in the direction of expanding the divergence angle, and by adjusting d>f1+f2, the first wavelength laser changes in the direction of reducing the divergence angle.

[0093] S207: Combining the adjusted first wavelength laser and the second wavelength laser into a composite laser beam.

[0094] S208: focusing the composite laser to a predetermined focal position.

[0095] In a specific implementation scenario, the first wavelength laser and the second wavelength laser after passing through the confocal component 3 are combined into a composite laser beam by the wavelength combining element 4. At this time, the composite laser is focused onto a beam analyzer or other detector by a focusing lens 5, so that the spot of the first wavelength laser measured on the detector is minimized, and the lens position is fixed.

[0096] From the above description, it can be seen that the present invention has lower requirements on the consistency of divergence angles produced by two lasers with different wavelengths, has a large adjustable range, does not involve adjustment of the internal optical path of the laser, and has a simple process and is easy to implement.

[0097] like Figure 7 As shown, Figure 7 The device 10 includes a memory 11 and a processor 12. The memory 11 stores a computer program, and the processor 12 executes the computer program when working to implement the following. Figure 5 and Figure 6 The method shown.

[0098] The specific technical details of a dual-wavelength laser focal length difference compensation method implemented when the above-mentioned device 10 executes a computer program have been discussed in detail in the aforementioned method steps, so they will not be repeated here.

[0099] like Figure 8 As shown, Figure 8 The storage medium 20 stores at least one computer program 21, which is executed by the processor 12 to implement the following. Figure 5 and Figure 6 In one embodiment, the medium 20 may be a storage chip, a hard disk, a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools, or a server, etc.

[0100] The above describes specific embodiments of the present specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily have to be performed in the specific order or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0101] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer-readable storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0102] The apparatus, device, non-volatile computer-readable storage medium and method provided in the embodiments of this specification correspond to each other, and therefore, the apparatus, device, and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the corresponding apparatus, device, and non-volatile computer storage medium will not be repeated here.

[0103] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0104] For the convenience of description, the above device is described by being divided into various units according to their functions and described separately. Of course, when implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware. It should be understood by those skilled in the art that this specification embodiment can be provided as a method, system, or computer program product. Therefore, this specification embodiment can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this specification embodiment can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0108] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0109] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0110] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0111] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0112] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0113] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0114] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A dual-wavelength laser focal length difference compensation device, characterized in that: The device includes: A first laser for emitting laser with a first wavelength; A second laser for emitting laser with a second wavelength; A confocal component that coincides with the optical axis of the first laser, for adjusting the divergence angle of the first-wavelength laser and focusing the first-wavelength laser and the second-wavelength laser to the same focal position.

2. The dual-wavelength laser focal length difference compensation device according to claim 1, characterized in that: The confocal component includes: a concave lens and a convex lens. The optical axis of the concave lens coincides with the optical axis of the convex lens. By adjusting the principal point distance between the convex lens and the concave lens, the divergence angle of the first-wavelength laser is changed, and the first-wavelength laser and the second-wavelength laser are focused to the same focal position.

3. The dual-wavelength laser focal length difference compensation device according to claim 2, characterized in that: The device further includes: a wavelength combining element and a focusing lens sequentially arranged along the optical path of the first-wavelength laser, The wavelength combining element for combining the first-wavelength laser and the second-wavelength laser that have been adjusted by the confocal component into a combined laser beam; The focusing lens for focusing the combined laser beam to a predetermined focal position.

4. A dual-wavelength laser focal length difference compensation method, characterized in that: The method includes: Emitting laser with a first wavelength; Emitting laser with a second wavelength; Adjusting the divergence angle of the first-wavelength laser and focusing the first-wavelength laser and the second-wavelength laser to the same focal position.

5. The dual-wavelength laser focal length difference compensation device according to claim 4, characterized in that: The adjusting the divergence angle of the first-wavelength laser and focusing the first-wavelength laser and the second-wavelength laser to the same focal position specifically includes: Adjusting the principal point distance between the convex lens and the concave lens to change the divergence angle of the first-wavelength laser; Combining the adjusted first-wavelength laser and the second-wavelength laser into a combined laser beam; Focusing the combined laser beam to a predetermined focal position.

6. The dual-wavelength laser focal length difference compensation device according to claim 5, characterized in that: The adjusting the distance between the convex lens and the concave lens to change the divergence angle of the first-wavelength laser specifically includes: Determining the focal length difference formula of the dual-wavelength laser according to the principal point distance between the convex lens and the concave lens, the focal length of the convex lens, and the focal length of the concave lens; If the focal length difference in the focal length difference formula is zero, determining the focal length difference compensation formula; Determining the compensation distance through the focal length difference compensation formula; Changing the divergence angle of the first-wavelength laser according to the compensation distance.

7. The dual-wavelength laser focal length difference compensation device according to claim 6, characterized in that: The if the focal length difference in the focal length difference formula is zero, determining the focal length difference compensation formula specifically includes: The focal length difference compensation formula is: Wherein, G[F(λ1)] is the focal length of the first laser, G[F(λ2)] is the focal length of the second laser, f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, d is the principal point distance between the convex lens and the concave lens, d2 is the principal point distance between the combination of the convex lens and the concave lens and the focusing lens, g1 is the amount by which the focal position after focusing of the first laser deviates from the standard value due to production error, and g2 is the amount by which the focal position after focusing of the second laser deviates from the standard value due to production error.

8. The dual-wavelength laser focal length difference compensation device according to claim 7, characterized in that: The changing the divergence angle of the first-wavelength laser according to the compensation distance specifically includes: Determining that the compensation distance of the principal point between the convex lens and the concave lens satisfies f1 + f2 = d, where f1 is the focal length of the convex lens, f2 is the focal length of the concave lens, and d is the principal point distance between the convex lens and the concave lens; Adjusting d < f1 + f2, then the divergence angle of the first-wavelength laser expands; Adjusting d > f1 + f2, then the divergence angle of the first-wavelength laser decreases.

9. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 4 to 8.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 4 to 8.

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