A rotation exposure imaging control method, device and storage medium

Abstract

This invention provides a rotational exposure imaging control method, apparatus, and storage medium to improve plate-making accuracy and ensure consistent exposure imaging. The method includes: acquiring the positional distribution information of pixel exposure points on a workpiece; performing a rotational exposure operation during rotation, the rotational exposure operation including: acquiring the real-time illuminating position of the emitted light array on the workpiece; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein a higher relative rotational linear velocity results in higher emitted light power; when the illuminating real-time position coincides with the position of the pixel exposure point on the workpiece, controlling the emitted light to expose the photosensitive or thermally sensitive coating at the pixel exposure point position; after at least one rotation, moving the emitted light a preset distance along a radial straight line and repeating the rotational exposure operation until all pixel exposure points are exposed.

Description

Technical Field

[0001] This invention relates to the field of direct imaging technology, and in particular to a rotational exposure imaging control method, apparatus, and storage medium. Background Technology

[0002] Computer-generated direct imaging (CPI) technology controls a light source assembly to scan and expose a photosensitive coating on an exposure surface, then develops the exposed coating to generate the desired image. Compared to existing mask-based exposure imaging technologies, laser imaging technology eliminates the need for a mask, significantly reducing production costs.

[0003] Existing direct imaging devices (such as the laser direct-to-plate device for flat screen printing stencils in application number 201310084860.3) often expose the surface to be processed by controlling the laser assembly to reciprocate scanning the exposure surface in a preset horizontal direction. Each reciprocating scan requires positioning to determine the starting point of each scan. Multiple scans are repeated during a single production process, which also requires multiple positioning operations. If the positioning is inaccurate at any point, it will affect the accuracy of the exposure imaging. Therefore, it is necessary to improve the direct imaging method. Summary of the Invention

[0004] This invention provides a rotational exposure imaging control method, apparatus, and storage medium to improve plate-making accuracy and ensure the consistency of exposure imaging.

[0005] The first aspect of this invention provides a data processing method applied to a rotating exposure imaging device, wherein the output light array of the rotating exposure imaging device can rotate relative to a rotation axis perpendicular to the exposure surface, and selectively expose pixels within a circular scanning area on the exposure surface; the laser imaging method may include:

[0006] Obtain the positional distribution information of pixel exposure points on the workpiece;

[0007] During rotation, a rotational exposure operation is performed, which includes: acquiring the real-time position of the emitted light array on the workpiece that can be irradiated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the greater the relative rotational linear velocity, the higher the emitted light power; and controlling the emitted light to expose the photosensitive or thermal coating at the position of the pixel exposure point when the real-time position that can be irradiated is consistent with the position of the pixel exposure point on the workpiece.

[0008] After each rotation at least once, the emitted light is moved a preset distance along the radial straight line direction, and the rotation exposure operation is repeated until all pixel exposure points are exposed. The radial straight line direction refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

[0009] Optionally, as a possible implementation, in this embodiment of the invention, adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions may include:

[0010] Obtain the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table;

[0011] According to the equation P = P0 + K*W*R N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

[0012] Optionally, as a possible implementation, in this embodiment of the invention, obtaining the real-time position of the emitted light array on the workpiece that can be irradiated may include:

[0013] Record the initial position of the emitted light on the exposure surface in polar coordinates;

[0014] Record the real-time rotation angle of the emitted light relative to the initial point position, and calculate the real-time position on the workpiece that the emitted light can illuminate based on the real-time rotation angle.

[0015] Optionally, as a possible implementation, in this embodiment of the invention, obtaining the positional distribution information of pixel exposure points on the workpiece may include:

[0016] The original image to be imaged is rasterized to obtain the pixel exposure point distribution information in the image coordinate system;

[0017] The pixel exposure point distribution information in the image coordinate system is converted into pixel exposure point distribution information in the polar coordinate system.

[0018] Optionally, as a possible implementation, in this embodiment of the invention, the emitted light from the direct imaging device is light modulated by a DMD digital micromirror device.

[0019] Optionally, as a possible implementation, in this embodiment of the invention, the emitted light from the direct imaging device is light emitted by a laser.

[0020] A second aspect of the present invention provides a data processing system, which may include:

[0021] The acquisition module is used to acquire the positional distribution information of pixel exposure points on the workpiece;

[0022] The rotation control module performs rotational exposure operations during rotation. These operations include: acquiring the real-time position of the emitted light array on the workpiece that can be illuminated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the higher the relative rotational linear velocity, the higher the emitted light power; and controlling the emitted light to expose the photosensitive or thermally sensitive coating at the position of the pixel exposure point when the real-time position that can be illuminated coincides with the position of the pixel exposure point on the workpiece.

[0023] The adjustment module rotates at least once, then moves the emitted light a preset distance along the radial straight line, and repeats the rotation exposure operation until all pixel exposure points are exposed. The radial straight line direction refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

[0024] Optionally, as one possible implementation, the rotation control module may include:

[0025] The acquisition unit is used to acquire the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table;

[0026] The calculation unit is used to calculate the equation P = P0 + K * W * R. N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

[0027] Optionally, as one possible implementation, the rotation control module may include:

[0028] The recording unit records the initial position of the outgoing light on the exposure surface in polar coordinates;

[0029] The rotation calculation unit records the real-time rotation angle of the emitted light relative to the initial point position, and calculates the real-time position of the emitted light that can be irradiated on the workpiece based on the real-time rotation angle.

[0030] Optionally, as one possible implementation, the acquisition module may include:

[0031] Rasterization unit: The original image to be imaged is rasterized to obtain the pixel exposure point distribution information in the image coordinate system;

[0032] The transformation unit converts the pixel exposure point distribution information in the image coordinate system into the pixel exposure point distribution information in the polar coordinate system.

[0033] A third aspect of the present invention provides a rotation imaging control device, the rotation imaging control device including a processor, the processor being configured to execute a computer program stored in a memory to implement the steps as described in the first aspect and any possible implementation thereof.

[0034] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the first aspect and any possible implementation thereof.

[0035] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0036] In this embodiment of the invention, the emitted light is controlled to rotate in a single direction relative to the exposure surface, eliminating the need for horizontal reciprocating scanning of the emitted light and thus avoiding repeated positioning, thereby preventing positioning errors and improving the accuracy of laser imaging. Simultaneously, during the rotational exposure process, the laser output power is adjusted according to the relative rotational linear velocity of lasers at different positions in the laser array. When the real-time irradiable position coincides with the position of the pixel exposure point on the workpiece, the emitted light is controlled to expose the photosensitive or thermally sensitive coating at the pixel exposure point. A higher relative rotational linear velocity results in higher laser power, which can reduce the difference in exposure energy caused by different scanning speeds with the same laser power, avoiding differences in developed images caused by inconsistent exposure energy in different imaging areas, and improving the consistency of exposure imaging. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structural distribution of the rotating exposure imaging device in an embodiment of the present invention;

[0038] Figure 2 This is a schematic flowchart of the data processing method in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of one embodiment of the rotation imaging control device in this invention. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0041] In the specification, claims, and accompanying drawings of this invention, the terms "center," "horizontal," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. The term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] To facilitate understanding, a brief description of the rotating exposure imaging device in the embodiments of this application will be given first. For example... Figure 1 As shown, the rotating exposure imaging device includes at least a light source 10 capable of emitting an outgoing light array (containing one or more beams of light 101). This outgoing light array can rotate relative to a rotation axis 30 perpendicular to the exposure surface 20 (either the exposure surface 20 rotates around the rotation axis 30 while the outgoing light array remains fixed, or the outgoing light array rotates around the rotation axis 30 while the exposure surface 20 remains fixed), and selectively exposes pixels on a circular scanning area formed on the exposure surface during the rotation. The direct imaging device can be used for printing plate making, circuit board printing, etc., and its outgoing light can be light modulated by a DMD digital micromirror device or light emitted by a laser; the specific application is not limited here.

[0044] The specific process in the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 One embodiment of the rotational exposure imaging control method of the present invention may include:

[0045] S201: Obtain the position distribution information of pixel exposure points on the workpiece.

[0046] After obtaining the original image that the user needs to image on the exposure surface, the original image can be rasterized to divide the image pixels into exposed pixels (pixels that need to be exposed) and non-exposed pixels (pixels that do not need to be exposed). The specific rasterization process can refer to existing technologies, and will not be elaborated here.

[0047] Preferably, after obtaining the position information of the pixel exposure point in the image coordinate system through rasterization processing, the position information can be further converted into position distribution information in the polar coordinate system. That is, the position distribution information of the pixel exposure point in this application can include the position distribution in the image coordinate system or the position distribution in the polar coordinate system, and the specific method is not limited here.

[0048] S202: Perform rotational exposure during rotation.

[0049] like Figure 1 As shown, during one rotation, the illuminated scanning path of the multiple beams of light can be considered as concentric rings. During the scanning process, each beam of light can selectively expose the pixels on its respective ring, that is, expose the pixels while not exposing the non-pixel exposure points. Therefore, after obtaining the positional distribution information of the pixel exposure points on the workpiece, it is necessary to pre-assign all the pixel exposure points to the corresponding beams of light according to their ring positions.

[0050] During the production process, the output light array of the rotary exposure imaging device can be controlled to rotate relative to the exposure surface around a rotation axis perpendicular to the exposure surface. During this rotation, a rotary exposure operation is performed, which may include: acquiring the real-time position of the output light array on the workpiece that can be illuminated; and when the real-time position that can be illuminated coincides with the position of the pixel exposure point on the workpiece, controlling the output light to expose the photosensitive or thermally sensitive coating at the pixel exposure point position.

[0051] Understandably, the greater the rotational linear velocity, the shorter the exposure time for a single pixel. If the emitted light exposes pixels with the same power, the inconsistent irradiation power on the coating surface will lead to inconsistent imaging. To ensure consistent laser imaging, during the rotational exposure operation, the power of the emitted light needs to be adjusted according to the relative rotational linear velocity of the emitted light at different positions; the greater the relative rotational linear velocity, the higher the emitted light power.

[0052] Optionally, the process of adjusting the laser output power before controlling the emitted light for exposure may include: acquiring the distance R between the vertical projection (spot) of each emitted light on the exposure surface of the workpiece and the center of rotation. N And the relative rotational angular velocity W, W*R NThat is, the relative rotational linear velocity of each emitted light spot on the exposure surface; according to the equation P = P0 + K*W*R N Calculate the output power corresponding to each emitted light, where P0 is the basic fixed power value and K is the preset proportional coefficient. The values ​​of P0 and K can be pre-calibrated according to the type, thickness, relative rotational linear velocity, and other parameters of the photosensitive or thermal coating used. Their specific values ​​are not limited here.

[0053] Optionally, as a possible implementation, obtaining the real-time position of the emitted light array on the workpiece that can be irradiated may include: recording the initial point position of the emitted light on the exposure surface in a polar coordinate system; recording the real-time rotation angle of the emitted light relative to the initial point position; and calculating the real-time position of the emitted light on the workpiece that can be irradiated based on the real-time rotation angle. For example, this application may use a displacement encoder or other optical sensor to detect the accumulated amount of rotation angle during relative rotation, and then calculate the included angle in polar coordinates. Alternatively, the rotation angle of the rotary table may be calculated directly based on the control pulse signal of the motor driving the rotary table, and then converted into the included angle of each laser relative to the polar axis in the polar coordinate system.

[0054] Taking a grating displacement sensor as an example of a displacement encoder, it includes a scale grating and a grating reading head. During operation, the scale grating (or magnetic grating base) can be set on the exposure surface and rotated. The grating reading head can be fixed on the periphery to detect and read the accumulated angle of rotation, which can then be converted into the angle between each laser and the polar axis in the polar coordinate system. Combined with the distance R between each laser spot on the exposure surface and the rotation center (i.e., the pole in the polar coordinate system), N This allows us to identify the coordinates of each laser spot in the polar coordinate system, thus indicating the real-time location that the laser can illuminate.

[0055] S203: After each rotation at least once, move the emitted light a preset distance along a radial straight line and repeat the rotation exposure operation until all pixel exposure points are exposed.

[0056] After each rotation of at least one revolution, the emitted light is moved a preset distance along a radial straight line to expose the next pixel on the next ring. This process is repeated until all pixels have been exposed. Here, the radial straight line refers to the straight line on the exposure surface that passes through the perpendicular projection point of the rotation axis.

[0057] As disclosed above, this application controls the emitted light to rotate in a single direction relative to the exposure surface, eliminating the need for horizontal reciprocating scanning of the emitted light and thus avoiding repeated positioning, thereby preventing positioning errors and improving the accuracy of laser imaging. Simultaneously, during the rotational exposure process, the laser output power is adjusted according to the relative rotational linear velocity of lasers at different positions in the laser array. When the real-time irradiable position coincides with the position of the pixel exposure point on the workpiece, the emitted light is controlled to expose the photosensitive or thermally sensitive coating at the pixel exposure point. A higher relative rotational linear velocity results in higher laser power, reducing the difference in exposure energy caused by different scanning speeds with the same laser power. This avoids differences in developed images caused by inconsistent exposure energy in different imaging areas, improving the consistency of exposure imaging.

[0058] To facilitate understanding, the following description, in conjunction with specific application examples, illustrates the rotational exposure imaging control method of this application. For instance, taking the emitted light from 10 lasers distributed radially in a straight line as an example, with the radial distance between two adjacent lasers being 10 units, in one exposure cycle, the laser exposure area formed by the laser point of each laser is a ring of a certain width. The rings corresponding to the 10 lasers form concentric rings, with the innermost ring numbered 0. For each additional unit increase in radius, the ring number increases by 1, forming rings 0 to 99. After each laser completes one ring of exposure scanning, it can move one unit distance radially, performing a total of 10 cycles, ultimately completing the selective exposure of pixels within the exposure area enclosed by rings 0 to 99. Specifically, during the first exposure cycle, the controller can control the laser to selectively expose the pixels on the rings numbered 0, 10, 20, 30, 40, 50, 60, 70, 80, and 90 (i.e., the pixels that need exposure are exposed in the 10 rings numbered 0, 10, 20, 30, 40, 50, 60, 70, 80, and 90, while the pixels that do not need exposure are not exposed). After the controller rotates one full circle, it can control the laser displacement stage to move the laser by one unit distance to expose the pixels numbered 1, 11, and 21. The pixels on the rings numbered 2, 12, 22, 32, 42, 52, 62, 72, 82, and 92 are selectively exposed. After the controller rotates one revolution, it controls the laser displacement stage to move the laser by one unit distance to selectively expose the pixels on the rings numbered 2, 12, 22, 32, 42, 52, 62, 72, 82, and 92, and so on. The target line overlaps with the laser exposure area 10 times. Each time the laser displacement stage moves the laser by one unit distance, it completes the selective exposure of all pixels on the exposure surface.

[0059] This application embodiment also provides a one-turn exposure imaging control system, which may include:

[0060] The acquisition module is used to acquire the positional distribution information of pixel exposure points on the workpiece;

[0061] The rotation control module performs rotational exposure operations during rotation. These operations include: acquiring the real-time position of the emitted light array on the workpiece that can be illuminated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the higher the relative rotational linear velocity, the higher the emitted light power; and controlling the emitted light to expose the photosensitive or thermally sensitive coating at the position of the pixel exposure point when the real-time position that can be illuminated coincides with the position of the pixel exposure point on the workpiece.

[0062] The adjustment module rotates at least once, then moves the emitted light a preset distance along the radial straight line, and repeats the rotation exposure operation until all pixel exposure points are exposed. The radial straight line direction refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

[0063] Optionally, as one possible implementation, the rotation control module may include:

[0064] The acquisition unit is used to acquire the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table;

[0065] The calculation unit is used to calculate the equation P = P0 + K * W * R. N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

[0066] Optionally, as one possible implementation, the rotation control module may include:

[0067] The recording unit records the initial position of the outgoing light on the exposure surface in polar coordinates;

[0068] The rotation calculation unit records the real-time rotation angle of the emitted light relative to the initial point position, and calculates the real-time position of the emitted light that can be irradiated on the workpiece based on the real-time rotation angle.

[0069] Optionally, as one possible implementation, the acquisition module may include:

[0070] Rasterization unit: The original image to be imaged is rasterized to obtain the pixel exposure point distribution information in the image coordinate system;

[0071] The transformation unit converts the pixel exposure point distribution information in the image coordinate system into the pixel exposure point distribution information in the polar coordinate system.

[0072] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0073] The data processing system in this embodiment of the invention has been described above from the perspective of modular functional entities. Please refer to [link / reference]. Figure 3 The rotation imaging control device in this embodiment of the invention is described below from the perspective of hardware processing:

[0074] The rotation imaging control device 1 may include a memory 11, a processor 12, and an input / output bus 13. The processor 11 executes the computer program to implement the above-described... Figure 2 The steps in the method embodiments shown, for example Figure 2 Steps 201 to 203 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0075] In some embodiments of the present invention, the processor is specifically used to implement the following steps:

[0076] Obtain the positional distribution information of pixel exposure points on the workpiece;

[0077] During the rotation process, a rotational exposure operation is performed, which includes: acquiring the real-time position of the emitted light array on the workpiece that can be illuminated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the greater the relative rotational linear velocity, the higher the emitted light power; and when the real-time position that can be illuminated coincides with the position of the pixel exposure point on the workpiece, controlling the emitted light to expose the photosensitive or thermally sensitive coating at the position of the pixel exposure point.

[0078] After each rotation at least once, the emitted light is moved a preset distance along the radial straight line and the rotation exposure operation is repeated until all pixel exposure points are completed. The radial straight line direction refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

[0079] Optionally, as one possible implementation, the processor can also be used to implement the following steps:

[0080] Obtain the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table;

[0081] According to the equation P = P0 + K*W*R N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

[0082] Optionally, as one possible implementation, the processor can also be used to implement the following steps:

[0083] Record the initial position of the emitted light on the exposure surface in polar coordinates;

[0084] Record the real-time rotation angle of the emitted light relative to the initial point position, and calculate the real-time position of the emitted light that can be irradiated on the workpiece based on the real-time rotation angle.

[0085] Optionally, as one possible implementation, the processor can also be used to implement the following steps:

[0086] The original image to be imaged is rasterized to obtain the pixel exposure point distribution information in the image coordinate system;

[0087] The pixel exposure point distribution information in the image coordinate system is transformed into the pixel exposure point distribution information in the polar coordinate system.

[0088] The memory 11 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the rotation imaging control device 1, such as the hard disk of the rotation imaging control device 1. In other embodiments, the memory 11 can be an external storage device of the rotation imaging control device 1, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the rotation imaging control device 1. Furthermore, the memory 11 can include both internal storage units and external storage devices of the rotation imaging control device 1. The memory 11 can be used not only to store application software and various types of data installed on the rotation imaging control device 1, such as computer program code, but also to temporarily store data that has been output or will be output.

[0089] In some embodiments, processor 12 may be a central processing unit (CPU), controller, microcontroller, microprocessor or other data processing chip, used to run program code stored in memory 11 or process data, such as executing computer programs.

[0090] The input / output bus 13 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc.

[0091] Furthermore, the rotation imaging control device may also include a wired or wireless network interface 14. The network interface 14 may optionally include a wired interface and / or a wireless interface (such as a WI-FI interface, Bluetooth interface, etc.), which is typically used to establish a communication connection between the rotation imaging control device 1 and other electronic devices.

[0092] Optionally, the rotation imaging control device 1 may further include a user interface, which may include a display, an input unit such as a keyboard, and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the rotation imaging control device 1 and to display a user interface for visualization.

[0093] Figure 3 Only the rotational imaging control device 1, which includes components 11-14 and a computer program, is shown. Those skilled in the art will understand that... Figure 3 The structure shown does not constitute a limitation on the rotation imaging control device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0094] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the above-described functions. Figure 2 The steps in the method embodiments shown, for example Figure 2 Steps 201 to 203 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0096] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0097] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0098] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0099] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 method for controlling rotational exposure imaging, characterized in that, Applied to a rotating exposure imaging device, the output light array of the rotating exposure imaging device can rotate relative to a rotation axis perpendicular to the exposure surface, and form selectively exposed pixels within a circular scanning area on the exposure surface; The rotational exposure imaging control method includes: Obtain the positional distribution information of pixel exposure points on the workpiece; During rotation, a rotational exposure operation is performed, which includes: acquiring the real-time position of the emitted light array on the workpiece that can be irradiated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the greater the relative rotational linear velocity, the higher the emitted light power; and controlling the emitted light to expose the photosensitive or thermal coating at the position of the pixel exposure point when the real-time position that can be irradiated is consistent with the position of the pixel exposure point on the workpiece. After each rotation at least once, the emitted light is moved a preset distance along a radial straight line and the rotation exposure operation is repeated until all pixel exposure points are exposed. The radial straight line refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

2. The rotational exposure imaging control method according to claim 1, characterized in that, The method of adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions includes: Obtain the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table; According to the equation P = P0 + K*W*R N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

3. The method according to claim 1 or 2, characterized in that, Obtaining the real-time position of the emitted light array on the workpiece that can be illuminated includes: Record the initial position of the emitted light on the exposure surface in polar coordinates; Record the real-time rotation angle of the emitted light relative to the initial point position, and calculate the real-time position on the workpiece that the emitted light can illuminate based on the real-time rotation angle.

4. The method according to claim 3, characterized in that, The step of obtaining the positional distribution information of pixel exposure points on the workpiece includes: The original image to be imaged is rasterized to obtain the pixel exposure point distribution information in the image coordinate system; The pixel exposure point distribution information in the image coordinate system is converted into pixel exposure point distribution information in the polar coordinate system.

5. The method according to claim 1 or 2, characterized in that, The emitted light from the rotating exposure imaging device is light modulated by a DMD digital micromirror device.

6. The method according to claim 1 or 2, characterized in that, The emitted light from the rotating exposure imaging device is light emitted by a laser.

7. A rotating exposure imaging control system, characterized in that, include: The acquisition module is used to acquire the positional distribution information of pixel exposure points on the workpiece; The rotation control module performs a rotational exposure operation during rotation. The rotational exposure operation includes: acquiring the real-time position of the emitted light array on the workpiece that can be irradiated; adjusting the power of the emitted light according to the relative rotational linear velocity of the emitted light at different positions, wherein the greater the relative rotational linear velocity, the higher the emitted light power; and controlling the emitted light to expose the photosensitive or thermally sensitive coating at the position of the pixel exposure point when the real-time position that can be irradiated is consistent with the position of the pixel exposure point on the workpiece. The adjustment module, after rotating at least one revolution, moves the emitted light a preset distance along the radial straight line and repeats the rotation exposure operation until all pixel exposure points are exposed. The radial straight line direction refers to the straight line direction on the exposure surface that passes through the vertical projection point of the rotation axis.

8. The rotational exposure imaging control system according to claim 7, characterized in that, The rotation control module includes: The acquisition unit is used to acquire the distance R between each light spot on the exposure surface of the workpiece and the rotation center. N And the rotational angular velocity W of the rotary table; The calculation unit is used to calculate the equation P = P0 + K * W * R. N Calculate the output power of each laser separately, where P0 is the base fixed power value and K is the proportionality coefficient.

9. A rotation imaging control device, characterized in that, The rotation imaging control device includes a processor for implementing the method as described in any one of claims 1 to 4 when executing a computer program stored in a memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 4.

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