A high-precision laser assembly device and a laser assembly method

Abstract

The embodiments of the present invention provide a high-precision laser assembly device and a laser assembly method, which are used to improve the production efficiency of lasers and ensure the consistency of the focal length of lasers and the spot offset at the focal length. In the embodiments of the present application, the position of the lens is repeatedly adjusted so that the reflected light of the incident laser passing through the beam splitter forms an image in the same preset area of the auxiliary imaging surface, which can ensure the consistency of the spot position offset at the laser focal length. Moreover, based on the CCD sensor to obtain the spot image data, the lens installation position corresponding to the spot image that meets the same preset conditions is automatically recognized, ensuring the consistency of the focal length, realizing the automatic selection of the lens installation position, eliminating the need for human eyes to identify and adjust the focal length of the laser, improving the production efficiency of the laser, reducing the processing error of the laser, and ensuring the consistency of the focal length of the laser and the spot offset at the focal length.

Description

Technical Field

[0001] The present invention relates to the technical field of laser device manufacturing, and in particular, to a high-precision laser assembly device and a laser assembly method. Background Art

[0002] In recent years, laser technology and applications have developed rapidly and have been combined with multiple disciplines to form multiple application technology fields, such as the laser plate-making field, which has greatly promoted the development of traditional industries and emerging industries.

[0003] In the laser plate-making field, it is necessary to use multiple lasers with the same focal length to expose and image the photosensitive coating at the focus. During the exposure imaging process, the laser focal length difference of multiple lasers is an important factor affecting the exposure imaging resolution. Therefore, during the laser assembly production process, it is necessary to adjust the position between the lens and the light source to keep the laser focal lengths of multiple lasers consistent and the spot offsets at the focal points consistent.

[0004] In related technologies, laser assembly often relies on the human eye to observe the focal position of the laser to calibrate the installation distance between the lens and the light source. Due to the uncontrollability of human eye observation, it is difficult to control the focal length of the laser and the spot offset direction at the focal point. Summary of the Invention

[0005] Embodiments of the present invention provide a high-precision laser assembly device and a laser assembly method for improving the production efficiency of lasers and ensuring the consistency of the focal length of lasers and the spot offset at the focal length.

[0006] A first aspect of an embodiment of the present invention provides a high-precision laser assembly device, which may include:

[0007] A charge-coupled device (CCD) sensor, a microscope assembly, a beam splitting and positioning assembly, and a control system; wherein,

[0008] The microscope assembly, the beam splitting and positioning assembly, and the CCD sensor are coaxially connected in sequence, and the axis is parallel to the laser propagation direction of the laser to be processed;

[0009] The beam splitting and positioning assembly includes a beam splitter for splitting the incident laser and an auxiliary imaging surface for imaging the reflected light;

[0010] The CCD sensor is set at a preset height for receiving the optical signal passing through the microscope assembly and the beam splitter and generating spot image data;

[0011] After turning on the laser to be processed, when repeatedly adjusting the position of the lens so that the reflected light of the incident laser passes through the beam splitter and forms an image in the same preset area on the auxiliary imaging surface, the control system collects the spot image data generated by the refracted light in the CCD sensor and records the lens positions corresponding to each spot image data.

[0012] The control system identifies a target spot image that meets the preset conditions from multiple pieces of the spot image data, and installs the lens according to the lens position corresponding to the target spot image.

[0013] Optionally, as a possible implementation manner, in the embodiment of the present invention, the control system identifying a target spot image that meets the preset conditions from multiple pieces of the spot image data includes:

[0014] The control system identifies the spot image with the maximum brightness from multiple pieces of the spot image data as the target spot image.

[0015] Optionally, as a possible implementation manner, the high-precision laser assembly device in the embodiment of the present invention may further include a lens clamping assembly for automatically clamping and moving the lens of the laser to be processed.

[0016] Optionally, as a possible implementation manner, in the embodiment of the present invention, the lens clamping assembly includes a three-axis moving platform and a jaw component;

[0017] The control system is used to control the lens clamping assembly to move the lens on a horizontal plane at a fixed height so that the generated spot image is in the same imaging area.

[0018] Optionally, as a possible implementation manner, the high-precision laser assembly device in the embodiment of the present invention may further include a light source bracket and a curing light source for curing the optical glue for bonding the laser lens.

[0019] Optionally, as a possible implementation manner, in the embodiment of the present invention, the number of the curing light sources is multiple.

[0020] Optionally, as a possible implementation manner, in the embodiment of the present invention, the curing light source is an ultraviolet light UV source.

[0021] Optionally, as a possible implementation manner, in the embodiment of the present invention, it further includes a fixed platform and a base fixing member; the base fixing member is fixed on the upper plane of the fixed platform and is used to fix the base of the laser to be processed.

[0022] Optionally, as a possible implementation manner, in the embodiment of the present invention, the base fixing member includes two groups of clamping components, and the clamping components are automatically clamped and fixed to the laser to be processed based on the drive of a cylinder or a motor.

[0023] In a second aspect of the embodiments of the present invention, a laser assembly method is provided, which is applied to the high-precision laser assembly device in any one of the embodiments in the first aspect, and may include:

[0024] After lighting the laser to be processed, adjust the lens so that the reflected light of the incident laser passing through the beam splitter forms an image in a preset area of the auxiliary imaging surface. The control system collects the spot image data generated by the refracted light in the CCD sensor and records the lens positions corresponding to each spot image data;

[0025] The control system identifies a target spot image that meets the preset conditions from multiple pieces of the spot image data, and installs the lens according to the lens position corresponding to the target spot image.

[0026] Optionally, as a possible implementation manner, the laser assembly method in the embodiments of the present invention further includes: moving the lens on a horizontal plane at a fixed height so that the reflected light of the incident laser passing through the beam splitter forms an image in the same preset area of the auxiliary imaging surface.

[0027] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0028] Compared with the related art, in the embodiments of the present application, by repeatedly adjusting the lens position so that the reflected light of the incident laser passes through the beam splitter and forms an image in the same preset area of the auxiliary imaging surface, the consistency of the spot position offset at the laser focal length can be ensured. Moreover, based on the CCD sensor to obtain the spot image data, the lens installation position corresponding to the spot image that meets the same preset conditions is automatically identified, ensuring the consistency of the focal length, realizing the automatic selection of the lens installation position, eliminating the need for human eyes to identify and adjust the focal length of the laser, improving the production efficiency of the laser, reducing the processing error of the laser, and ensuring the consistency of the laser focal length size and the spot offset at the focal length. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of an embodiment of the high-precision laser assembly device provided by the embodiments of the present invention;

[0030] Figure 2 It is a schematic diagram of the working scenario of the beam splitting and positioning component in the high-precision laser assembly device provided by the embodiments of the present invention;

[0031] Figure 3 It is a schematic diagram of another embodiment of the high-precision laser assembly device provided by the embodiments of the present invention. Detailed Embodiments

[0032] Embodiments of the present invention provide a high-precision laser assembly device and a laser assembly method, which are used to improve the production efficiency of lasers and ensure the consistency of the focal length size and the spot offset at the focal length of the lasers.

[0033] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] In the specification and claims of the present invention and the above-mentioned accompanying drawings, the terms "center", "horizontal", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] For the convenience of understanding, the specific structure in the embodiments of the present invention will be described below. Please refer to Figure 1 , the high-precision laser assembly device provided in the embodiments of the present invention may include: a charge-coupled device (CCD) sensor 10, a microscope assembly 20, a beam splitting and positioning assembly 30, and a control system 40. Among them,

[0037] The microscope assembly 20, the beam splitting and positioning assembly 30, and the CCD sensor 10 are coaxially connected in sequence, and the axis is parallel to the laser propagation direction of the laser to be processed. The laser can sequentially pass through the microscope assembly 20 and the beam splitting and positioning assembly 30 along the same axis and propagate to the photosensitive area of the CCD sensor 10.

[0038] The microscope assembly 20 in this application is composed of a combination of one or several lenses and is an optical instrument for magnifying tiny objects. The specific microscope structure can refer to related technologies and will not be elaborated here.

[0039] As shown Figure 2 in the figure, the spectroscopic positioning component 30 includes a spectroscope 301 for splitting the incident laser beam and an auxiliary imaging surface 302 for imaging the reflected light. Among them, the spectroscope 301 is a coated glass, with one or more thin films deposited on the surface of the optical glass. When a beam of light is projected onto the coated glass, the beam is split into at least two beams through reflection and refraction. In order to prevent the laser beams with the same focal length from having different deflection directions on the same plane, in this application, it is necessary to ensure that the reflected light forms an image in the preset area 303 of the auxiliary imaging surface 302, while the refracted light is detected in the preset area 101 of the CCD sensor 10. The angle between the plane where the spectroscope 301 is located and the horizontal plane can be 45 degrees or other acute angles less than a right angle, and specific details are not limited here.

[0040] The CCD sensor 10 is set at a preset height, and is used to receive the optical signal that sequentially passes through the microscope component 20 and the spectroscope 301, and generate spot image data.

[0041] The laser assembly method based on this high-precision laser assembly device may include the following steps: First, set the height of the CCD sensor based on the preset focal length of the required laser, then turn on the laser, and adjust the position of the lens so that the reflected light of the incident laser passes through the spectroscope and forms an image in the preset area of the auxiliary imaging surface. At this time, the spot image data generated by the refracted light in the CCD sensor is obtained. To ensure that the deflection directions of the spots at the focal point of the laser are consistent, it is necessary to ensure that the reflected light forms an image in the preset area of the auxiliary imaging surface and the refracted light forms an image in the same area of the CCD sensor (specifically, a fixed imaging display area can be selected in the imaging area displayed by the CCD sensor on the host computer. On the premise that the position of the CCD sensor is fixed, the same imaging display area where the spot is located can ensure that the refracted light forms an image in the same area of the CCD sensor). Then, collect the spot image data generated by the refracted light in the CCD sensor; after collecting the data once, readjust the position of the lens so that the reflected light of the incident laser passes through the spectroscope and forms an image in the same preset area of the auxiliary imaging surface (that is, repeat the execution); after each imaging, collect the spot image data generated by the refracted light in the CCD sensor, and record the position of the lens corresponding to the current spot image data; in this way, the control system can record multiple lens positions that meet the conditions, and receive multiple spot image data sent by the CCD sensor under different lens positions; the control system can identify the target spot image that meets the preset conditions, so as to install the lens according to the lens position corresponding to the target spot image. When the lens is installed at the lens position corresponding to the target spot image, the preset focal length of the laser to be processed can be considered achieved.

[0042] It should be noted that the preset condition for screening the target spot image can be the target height corresponding to the spot image with the maximum recorded brightness, or the target height corresponding to the spot image with the brightness in the preset area of the spot image exceeding the preset value, or the clarity of the spot image exceeding the preset threshold. The specific preset condition is not limited here.

[0043] As can be seen from the above embodiments, compared with the related art, in the embodiments of the present application, the position of the lens is repeatedly adjusted so that the reflected light of the incident laser passes through the beam splitter and forms an image in the same preset area of the auxiliary imaging surface, and the refracted light forms an image in the same area of the CCD sensor, which can ensure the consistency of the spot position offset at the laser focal length and the consistency of the laser focal length size and the spot offset at the focal length. Moreover, based on the CCD sensor to obtain the spot image data, the lens installation position corresponding to the spot image that meets the same preset conditions is automatically identified, which ensures the consistency of the focal length, realizes the automatic selection of the lens installation position, eliminates the need for manual eye recognition to adjust the focal length of the laser, improves the production efficiency of the laser, reduces the processing error of the laser, and further ensures the consistency of the laser focal length size and the spot offset at the focal length.

[0044] Optionally, in order to improve the efficiency of the control system in collecting data, as Figure 3 shown, a lens clamping assembly 50 driven by a stepper motor or a servo motor can be set to realize automatic clamping and movement of the lens of the laser to be processed, and automatic and precise acquisition of position data.

[0045] Optionally, as a possible implementation manner, on the basis of the above embodiments, the lens clamping assembly 50 in the embodiments of the present application includes a three-axis moving platform 501 and a jaw component 502; the control system can not only control the lens clamping assembly 50 to move the lens up and down in the laser propagation direction, but also control the lens clamping assembly 50 to move the lens on a horizontal plane at a fixed height, so that the reflected light of the incident laser passes through the beam splitter 301 and forms an image in the same preset area of the auxiliary imaging surface 302, ensuring the consistency of the spot position offset at the focal length.

[0046] In practical applications, after bonding the lens with optical glue, it is necessary to cure the optical glue. Optionally, as a possible implementation manner, in order to further improve the production efficiency, the high-precision laser assembly equipment provided in any of the above embodiments may further include a light source bracket and a curing light source for curing the optical glue for bonding the laser lens. Optionally, the number of curing light sources is multiple, and the curing light source can be an ultraviolet light UV light source or other light sources, which can be specifically determined according to the selected optical glue and is not limited here.

[0047] Optionally, as a possible implementation, in order to ensure the stability of the high-precision laser assembly equipment, the high-precision laser assembly equipment may further include a base fixing member, which automatically clamps and fixes the laser to be processed based on the driving of a cylinder or a motor. Optionally, the base fixing member includes two sets of clamping components, which automatically clamp and fix multiple positions of the laser to be processed based on the driving of a cylinder or a motor.

[0048] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision laser assembly device, characterized in that, Including: A charge-coupled device (CCD) sensor, a microscope assembly, a spectroscopic positioning assembly, and a control system; wherein, The microscope assembly, the spectroscopic positioning assembly, and the CCD sensor are coaxially connected in sequence, and the axis is parallel to the laser propagation direction of the laser to be processed; The spectroscopic positioning assembly includes a spectroscope for splitting the incident laser, and an auxiliary imaging surface for imaging the reflected light; The CCD sensor is set at a preset height to receive the optical signal passing through the microscope assembly and the spectroscope, and generate spot image data; After the laser to be processed is lit, the control system controls the lens clamping assembly to repeatedly adjust the lens position in the laser propagation direction and the horizontal plane direction so that the reflected light of the incident laser passing through the spectroscope is imaged in the same preset area of the auxiliary imaging surface and the refracted light is imaged in the same area of the CCD sensor. At this time, the control system collects the spot image data generated by the refracted light in the CCD sensor, and records the lens position corresponding to each spot image data; The control system identifies the target spot image that meets the preset conditions from multiple pieces of the spot image data, so as to install the lens according to the lens position corresponding to the target spot image.

2. The high-precision laser assembly device according to claim 1, wherein The control system identifying the target spot image that meets the preset conditions from multiple pieces of the spot image data includes: The control system identifies the spot image with the maximum brightness from multiple pieces of the spot image data as the target spot image.

3. The high-precision laser assembly device according to claim 1 or 2, characterized in that It further includes a lens clamping assembly for automatically clamping and moving the lens of the laser to be processed.

4. The high-precision laser assembly device according to claim 3, characterized in that The lens clamping assembly includes a three-axis moving platform and a jaw component; The control system is used to control the lens clamping assembly to move the lens on the horizontal plane at a fixed height, so that the reflected light of the incident laser passing through the spectroscope is imaged in the same preset area of the auxiliary imaging surface.

5. The high-precision laser assembly equipment according to claim 2, characterized in that, It further includes a light source bracket and a curing light source for curing the optical glue for bonding the laser lens.

6. The high-precision laser assembly device according to claim 5, wherein, The number of the curing light sources is multiple.

7. The high-precision laser assembly device according to claim 6, characterized in that, The curing light source is an ultraviolet (UV) light source.

8. The high-precision laser assembly equipment according to any one of claims 1, 2, 4, 5, 6, and 7, characterized in that It further includes: A fixed platform and a base fixing member; The base fixing member is fixed on the upper plane of the fixed platform for fixing the base of the laser to be processed.

9. The high-precision laser assembly device according to claim 8, characterized in that, The base fixing member includes two groups of clamping assemblies, and automatically clamps and fixes the laser to be processed based on the driving of a cylinder or a motor.

10. A method for assembling a laser, characterized in that, Applied to the high-precision laser assembly equipment according to any one of claims 1 to 9, the method includes: Setting the CCD sensor at a preset height, receiving the optical signal passing through the microscope assembly and the spectroscope, and generating spot image data; After the laser to be processed is lit, controlling the lens clamping assembly to adjust the lens in the laser propagation direction and the horizontal plane direction so that the reflected light of the incident laser passing through the spectroscope is imaged in the preset area of the auxiliary imaging surface and the refracted light is imaged in the same area of the CCD sensor, then recording the lens position, and collecting the spot image data corresponding to the current position; Identifying the target spot image that meets the preset conditions from multiple pieces of the spot image data, and installing the lens according to the lens position corresponding to the target spot image.

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