CN110919195A - Imaging method for improving resolution by realizing flexographic plate making - Google Patents
Imaging method for improving resolution by realizing flexographic plate making Download PDFInfo
- Publication number
- CN110919195A CN110919195A CN201911265469.7A CN201911265469A CN110919195A CN 110919195 A CN110919195 A CN 110919195A CN 201911265469 A CN201911265469 A CN 201911265469A CN 110919195 A CN110919195 A CN 110919195A
- Authority
- CN
- China
- Prior art keywords
- data
- numbered
- plate making
- imaging method
- brush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention discloses an imaging method for realizing flexographic plate making and improving resolution, which comprises the following steps: dividing the whole image data of the multi-path laser equipment into odd-numbered brushes and even-numbered brushes according to odd-numbered bits and even-numbered bits; performing gap filling processing on the front 1/2 paths of the first brushing data; when the plate is made, the odd-numbered brush data and the even-numbered brush data are displaced by 1/2 paths of pixel points/times, so that the odd-numbered brush data and the even-numbered brush data are alternately overlapped. The invention has the advantage that the equipment platemaking resolution is greatly improved without upgrading the optical system and elements.
Description
Technical Field
The invention relates to an imaging method for realizing flexographic plate making and improving resolution.
Background
The F-CTP flexo direct plate-making machine is composed of three major parts, namely an accurate and complex optical system, a circuit system and a mechanical system. Among them, the photoelectric system is especially important in the plate making process.
The plate making of the flexible plate direct plate making machine is that a single beam of original laser produced by a laser is split into a plurality of ultra-fine laser beams by a multi-path optical fiber close-packed or complex high-speed rotating optical splitting system, and each beam of light is modulated by an acousto-optic modulator according to the characteristics of brightness and darkness of image information in a computer and the like, and then becomes a controlled beam. Then focusing by an optical lens, and directly irradiating dozens to hundreds of beams of micro laser on the surface of the flexible plate to perform plate engraving work. The diameter of each micro-laser beam and the shape of the light intensity distribution of the beam determine the sharpness and resolution of the image formed on the plate. The smaller the spot of the laser beam is, the closer the light intensity distribution of the beam is to a rectangle (ideal), and the higher the definition and resolution of the image formed by laser engraving. The spot size of the laser beam is determined by the wavelength of the laser light source, and the resolution of the plate making can be improved by using laser with shorter wavelength and higher-level optical system elements. However, the more mature lasers in the current technology are classified into: gas laser; a solid state laser; semiconductor lasers and the like, generally used laser light sources have wavelengths of 400nm to 1064nm, laser energy transmission is mature and widely used in an optical fiber transmission scheme, and lasers with laser modulation functions are high in cost and complex in technology, so that the lasers are few in use.
With a specific kind of laser, laser light source and optical fiber close packing, the resolution that a flexo-direct plate making machine can provide is typically 1200DPI, 2000DPI, 2400DPI, 2540DPI, 4000DPI, 5080 DPI. Achieving higher resolution, such as 4000DPI up to 8000DPI imaging accuracy under existing technology conditions requires replacement of more advanced optical systems and components or is otherwise difficult to achieve.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides an imaging method for realizing the resolution improvement of the flexographic plate, and the resolution is improved under the condition of not changing equipment.
In order to achieve the above object, the present invention adopts the following scheme:
an imaging method for realizing flexographic plate making and improving resolution comprises the following steps:
dividing the whole image data of the multi-path laser equipment into odd-numbered brushes and even-numbered brushes according to odd-numbered bits and even-numbered bits;
performing gap filling processing on the front 1/2 paths of the first brushing data;
when the plate is made, the odd-numbered brush data and the even-numbered brush data are displaced by 1/2 paths of pixel points/times, so that the odd-numbered brush data and the even-numbered brush data are alternately overlapped.
Further, an imaging method for realizing the resolution improvement of the flexographic plate making further comprises the following steps:
the post 1/2 ways of the last data brush are filled with null.
And further, the first brush data and the last brush data are subjected to gap filling processing and then transmitted to a laser control panel of the plate making machine.
Further, the laser control board receives data to control the laser to work.
Further, a CTP plate making machine is used for plate making.
Further, after the roller of the plate making machine rotates, the encoder performs signal feedback control on the movement of the laser platform to perform laser plate making.
Further, during plate making, the odd-numbered brush data and the even-numbered brush data are spirally displaced by 1/2 paths of pixel points/circles, so that the odd-numbered brush data and the even-numbered brush data are alternately overlapped.
Furthermore, the number of closely arranged optical fibers of the plate making machine is even multiple of 4.
Further, the plate making machine is a 48-channel laser device.
Further, the plate making machine is a 16-way or 32-way laser device.
The invention is advantageous in that the resolution is improved without changing the equipment.
Drawings
FIG. 1 is a flow chart of an imaging method of the present invention for achieving improved resolution in flexographic printing;
FIG. 2 is a plate making flow chart of an imaging method for improving resolution by implementing flexographic plate making according to the present invention;
FIG. 3 is a schematic diagram of data brush data interleaving and overlapping for an imaging method for achieving resolution enhancement in flexographic plate making according to the present invention;
FIG. 4 is a schematic diagram of the actual arrangement of parity data overlap for an imaging method for achieving resolution enhancement in flexographic printing in accordance with the present invention;
FIG. 5 is a 48 way 2 data diagram;
FIG. 6 is a schematic diagram of the data of FIG. 5 after the first 24 ways of the first brush are filled with dummy data and parity data are interleaved and overlapped.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 6, an imaging method for realizing flexographic plate making and improving resolution includes the following steps:
dividing the whole image data of the multi-path laser equipment into odd-numbered brushes and even-numbered brushes according to odd-numbered bits and even-numbered bits;
performing gap filling processing on the front 1/2 paths of the first brushing data;
when the plate is made, the odd-numbered brush data and the even-numbered brush data are displaced by 1/2 paths of pixel points/times, so that the odd-numbered brush data and the even-numbered brush data are alternately overlapped. Specifically, a CTP plate making machine is used to perform plate making. More specifically, the plate-making machine is an F-CTP flexo direct plate-making machine. During plate making, the odd brush data and the even brush data are spirally displaced by 1/2 paths of pixel points/circles, so that the odd brush data and the even brush data are alternately overlapped.
Specifically, the imaging method for realizing the flexography and improving the resolution further comprises the following steps: the post 1/2 ways of the last data brush are filled with null. And transmitting the data to a laser control panel of the plate making machine after the first brush data and the last brush data are subjected to blank filling processing. The laser control board receives data to control the laser to work.
Further, after the roller of the plate making machine rotates, the encoder performs signal feedback control on the movement of the laser platform to perform laser plate making.
The number of closely arranged optical fibers in the plate making machine is even multiple of 4. The plate making machine can be a 16-path, 32-path or 48-path laser device.
In the scheme, a certain number of optical fibers are fixed into optical fiber close packing in a flat or inclined arrangement mode, and each optical fiber emits one path of laser for exposing and engraving the flexible printing plate material in the imaging process. The number of optical fibers in one optical fiber dense row is usually an even integer multiple of 4, such as 16 paths, 32 paths, 48 paths, 96 paths and the like, the working mode is that all optical fibers work simultaneously in the plate making process according to data sent by a plate making output device, and the optical fiber dense row from the beginning end of the flexible plate to the end of the flexible plate is called one-brush data. On the basis of 4000DPI resolution, 8000DPI resolution is realized by adopting a method of interleaving and arranging odd-numbered brush data and even-numbered brush data, and a design principle is explained below with reference to fig. 3 and 4 on the basis of a data brush formed by 4 paths of laser.
And simulating a schematic diagram of closely-arranged laser data brushes at the resolution of 4000DPI, wherein each circle represents a light spot formed by each laser on the flexographic printing plate, 4 circles with grids inside represent data of a first brush (an odd brush), and 4 black circles represent data of a second brush (an even brush).
8000DPI is realized on the basis of 4000DPI, a method for alternate arrangement between first brush (odd-numbered brush) data and second brush (even-numbered brush) data is adopted on data arrangement, an alternate position is a central position where a first path of laser center of the second brush data is alternate to the whole first brush data, and the alternate scheme is realized by reducing the transverse moving speed of a data brush. During interleaving arrangement, data interleaving areas are generated by odd-numbered brushes and even-numbered brushes, and the data interleaving areas are the key principle that the resolution of 4000DPI is improved to the resolution of 8000 DPI.
8000DPI is actually used in the flexographic plate making, and the actual facula is more than 12um, and 8000DPI actual pixel interval is 3.175um, and the facula size far exceeds actual pixel interval. The data arrangement is in a manner of overlapping odd data, and the connection arrangement is as shown in fig. 4 (in the figure, different odd brushes and different even brushes are shown in a staggered manner from top to bottom to better embody the principle, and the actual data brushes are overlapped together). The odd-numbered brush data and the even-numbered brush data only need to be transversely shifted by the same interval, and 1/2 laser paths are shifted each time (2 laser light spots are taken as an example in the schematic diagram).
Taking 16 paths of light as an example, when the transverse moving is carried out, the spiral line displacement is carried out only according to the speed of 8 pixel points/circle, and the transverse precision of 8000DPI (considering that the parity of actual pixel points has overlap) can be simulated on the original 16 paths of 4000DPI precision equipment through the superposition of parity column data. Meanwhile, 8000DPI is realized on the longitudinal exposure frequency, and thus a whole-breadth 8000DPI image can be realized. And similarly, 8000DPI exposure of 32/48 lasers can be realized.
Taking a 48-channel laser counting device as an example, referring to fig. 5 and 6, it is assumed that data of one image is 01010101 … … (96 in total), and theoretically, data needs to be sent twice, namely odd-numbered brushes and even-numbered brushes. The odd-numbered brush data is 0000 … … (48 in total) and the even-numbered brush data is 1111 … … (48 in total), instead of 0101 … … (48 × 2) data arranged consecutively twice in the real image. Due to the problem of buffer size in the CTP data board, the method cannot divide 48 paths of one-whole-brush data into odd numbers and even numbers and then divide the data out, so that the image data needs to be divided into odd-even brushes by a front end and transmitted to the CTP. During the data transmission, the first 24 ways of the first brush and the last 24 ways of the last brush are unusable because there is no parity overlap. The processing method is to fill in the first 24 bits of the first brushing data and the last 24 bits of the last brushing data. So the 96-bit 01010101 … … data actually needs to be sent three times (in a brush) to complete.
This further leads to a 32-way device with 16-bit padding in front of the first-swipe data and 16-bit padding behind the last-swipe data. In 16-channel equipment, the front 8 bits of the first data are filled with null, and the back 8 bits of the last data are filled with null.
The method for overlapping and arranging the parity data can improve the imaging resolution of the flexographic plate direct-to-plate machine from 4000DPI to 8000DPI, thereby avoiding the cost of changing and replacing equipment and greatly improving the plate-making resolution of the flexographic plate direct-to-plate machine. The scheme that the resolution of the equipment plate making is greatly improved without upgrading an optical system and elements under the existing condition solves the technical problem that the resolution of the plate making equipment in the flexo plate making industry is improved from 4000DPI to 8000 DPI.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. An imaging method for realizing flexographic plate making and improving resolution is characterized by comprising the following steps:
dividing the whole image data of the multi-path laser equipment into odd-numbered brushes and even-numbered brushes according to odd-numbered bits and even-numbered bits;
performing gap filling processing on the front 1/2 paths of the first brushing data;
when the plate is made, the odd-numbered brush data and the even-numbered brush data are displaced by 1/2 paths of pixel points/times, so that the odd-numbered brush data and the even-numbered brush data are alternately overlapped.
2. An imaging method for achieving improved resolution in flexographic printing according to claim 1, further comprising the steps of:
the post 1/2 ways of the last data brush are filled with null.
3. An imaging method for realizing resolution enhancement in flexographic printing according to claim 2,
and transmitting the data to a laser control panel of the plate making machine after the first brush data and the last brush data are subjected to blank filling processing.
4. An imaging method for realizing resolution enhancement in flexographic printing according to claim 3,
the laser control board receives data to control the laser to work.
5. An imaging method for realizing resolution enhancement in flexographic printing according to claim 1,
and (4) carrying out plate making operation by using a CTP plate making machine.
6. An imaging method for realizing resolution enhancement in flexographic printing according to claim 1,
after the roller of the plate making machine rotates, the encoder performs signal feedback control on the movement of the laser platform to perform laser plate making.
7. An imaging method for realizing resolution enhancement in flexographic printing according to claim 1,
during plate making, the odd brush data and the even brush data are spirally displaced by 1/2 paths of pixel points/circles, so that the odd brush data and the even brush data are alternately overlapped.
8. An imaging method for realizing resolution enhancement in flexographic printing according to claim 1,
the number of closely arranged optical fibers in the plate making machine is even multiple of 4.
9. An imaging method for realizing resolution enhancement in flexographic printing according to claim 8,
the plate making machine is a 48-path laser device.
10. An imaging method for realizing resolution enhancement in flexographic printing according to claim 8,
the plate making machine is a 16-path or 32-path laser device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265469.7A CN110919195A (en) | 2019-12-11 | 2019-12-11 | Imaging method for improving resolution by realizing flexographic plate making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265469.7A CN110919195A (en) | 2019-12-11 | 2019-12-11 | Imaging method for improving resolution by realizing flexographic plate making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110919195A true CN110919195A (en) | 2020-03-27 |
Family
ID=69858822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911265469.7A Pending CN110919195A (en) | 2019-12-11 | 2019-12-11 | Imaging method for improving resolution by realizing flexographic plate making |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110919195A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510303A (en) * | 2009-03-26 | 2009-08-19 | 北京兆维科技股份有限公司 | Method and system for image renovation |
| CN103491335A (en) * | 2013-09-24 | 2014-01-01 | 深圳超多维光电子有限公司 | Image display method and device |
| CN105097873A (en) * | 2015-06-01 | 2015-11-25 | 京东方科技集团股份有限公司 | Array substrate and display device |
| CN107160824A (en) * | 2017-05-22 | 2017-09-15 | 杭州科雷机电工业有限公司 | A kind of method of times of several levels high-precision laser imaging |
| US20180034981A1 (en) * | 2013-03-15 | 2018-02-01 | Biscom Inc. | Transmission of Facsimiles via Internet Protocol over Public Networks |
| CN108965764A (en) * | 2018-06-26 | 2018-12-07 | 晨星半导体股份有限公司 | Image processing method and electronic equipment |
| CN110515260A (en) * | 2018-05-21 | 2019-11-29 | 成都理想境界科技有限公司 | A kind of method and laser scanning imaging equipment of laser scanning imaging |
-
2019
- 2019-12-11 CN CN201911265469.7A patent/CN110919195A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510303A (en) * | 2009-03-26 | 2009-08-19 | 北京兆维科技股份有限公司 | Method and system for image renovation |
| US20180034981A1 (en) * | 2013-03-15 | 2018-02-01 | Biscom Inc. | Transmission of Facsimiles via Internet Protocol over Public Networks |
| CN103491335A (en) * | 2013-09-24 | 2014-01-01 | 深圳超多维光电子有限公司 | Image display method and device |
| CN105097873A (en) * | 2015-06-01 | 2015-11-25 | 京东方科技集团股份有限公司 | Array substrate and display device |
| CN107160824A (en) * | 2017-05-22 | 2017-09-15 | 杭州科雷机电工业有限公司 | A kind of method of times of several levels high-precision laser imaging |
| CN110515260A (en) * | 2018-05-21 | 2019-11-29 | 成都理想境界科技有限公司 | A kind of method and laser scanning imaging equipment of laser scanning imaging |
| CN108965764A (en) * | 2018-06-26 | 2018-12-07 | 晨星半导体股份有限公司 | Image processing method and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6784912B2 (en) | Compact multibeam laser light source and interleaving raster scan line method for exposing printing plates | |
| US4900130A (en) | Method of scanning | |
| JP5220794B2 (en) | Multi-beam exposure scanning method and apparatus and printing plate manufacturing method | |
| DE2262824B2 (en) | Process for the rasterized reproduction of colored halftone images in single or multi-color printing | |
| CN100428066C (en) | Image formation equipment | |
| US6765604B2 (en) | Banding-reduced imaging of a printing form | |
| EP0038497B1 (en) | Method of imaging an electrophotographic member and apparatus for carrying out the method | |
| CN102239449A (en) | Multi-beam exposure scanning method and apparatus, and method for manufacturing printing plate | |
| KR20130139308A (en) | Data path for lithography apparatus | |
| CN110919195A (en) | Imaging method for improving resolution by realizing flexographic plate making | |
| JP2004326076A (en) | Pattern drawing apparatus | |
| EP1674930B1 (en) | Stitching prevention in multibeam imaging for exposing printing plates | |
| CN102239450A (en) | Multi-beam exposure scanning method and apparatus, and method for manufacturing printing plate | |
| CN1241069C (en) | Pattern writing apparatus, pattern writing method and substrate | |
| CN109656101B (en) | Data processing method for digital micromirror tilt scanning | |
| JP3819985B2 (en) | Laser drawing device | |
| JP4273290B2 (en) | Multiple exposure drawing apparatus and multiple exposure drawing method | |
| JP2636984B2 (en) | Image connection method and apparatus | |
| EP1189425B1 (en) | Multi-beam exposure method | |
| JP4396979B2 (en) | Laser exposure equipment | |
| CA2405206A1 (en) | Method of exposing a printing form | |
| EP2334498B1 (en) | Improvements in semiconductor lasers | |
| JP5500716B2 (en) | Relief manufacturing apparatus and relief manufacturing method | |
| JP4246527B2 (en) | Plate imaging with a laser diode assembly that also has a non-activatable laser diode. | |
| JP2017223737A (en) | Image forming apparatus, image forming method, and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200327 |
|
| RJ01 | Rejection of invention patent application after publication |