CN107688283B - Method and device for manufacturing holographic molded plate containing watermark information and holographic molded plate - Google Patents
Method and device for manufacturing holographic molded plate containing watermark information and holographic molded plate Download PDFInfo
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- CN107688283B CN107688283B CN201710346049.6A CN201710346049A CN107688283B CN 107688283 B CN107688283 B CN 107688283B CN 201710346049 A CN201710346049 A CN 201710346049A CN 107688283 B CN107688283 B CN 107688283B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000013461 design Methods 0.000 claims abstract description 17
- 238000001259 photo etching Methods 0.000 claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000007781 pre-processing Methods 0.000 claims abstract description 13
- 238000005323 electroforming Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 238000004049 embossing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 238000007723 die pressing method Methods 0.000 claims description 6
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/08—Synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/08—Forme preparation by embossing, e.g. with a typewriter
Abstract
The invention discloses a method for manufacturing a holographic molding plate containing watermark information, which comprises the following steps: s100, embedding watermark information into the design graph to generate a watermark image containing the watermark information; s200, preprocessing the watermark image; s300, converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern; s400, forming a hologram on the photoetching offset plate according to the holographic plate making data; s500, forming the holographic mould pressing plate containing the hologram on the metal nickel plate in an electroforming mode. The invention embeds watermark information into the design pattern, shows the watermark information through the diffraction of the holographic microstructure, and generates the holographic mould pressing plate according to the holographic microstructure, thereby realizing the perfect integration of the digital watermark technology and the holographic technology, not only keeping the brightness and the aesthetic degree of the hologram, but also reducing the interference and the misjudgment rate of the hologram when identifying and extracting the watermark information, and greatly shortening the response time.
Description
Technical Field
The invention relates to the field, in particular to a holographic molded plate and a manufacturing method and device of the holographic molded plate containing watermark information.
Background
The laser holographic anti-fake technology is one kind of visible graph and text information produced on product by means of laser rainbow hologram plate making technology and mold pressing duplication technology. With the comprehensive utilization of computer dot matrix photoetching technology, 3D true color holographic technology, multiple and dynamic imaging technology and other technologies, the development of laser holographic anti-counterfeiting technology at higher level is promoted. The encryption technologies such as optical random interference fringes, optical micro, dynamic holography, space stereo, digital dot matrix images and the like developed by the technology are continuously emerging and become the mainstream direction of laser holographic anti-counterfeiting at present. These encryption schemes are all implemented at the laser platemaking stage using various special techniques that combine optical and computer information processing.
With the continuous innovation of various anti-counterfeiting technologies, solutions combining multiple anti-counterfeiting technologies are increasingly required.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for manufacturing a holographic mould pressing plate containing watermark information and the holographic mould pressing plate.
The technical scheme provided by the invention is as follows:
the invention discloses a method for manufacturing a holographic molding plate containing watermark information, which comprises the following steps: s100, embedding watermark information into the design graph to generate a watermark image containing the watermark information; s200, preprocessing the watermark image; s300, converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern; s400, forming a hologram on the photoetching offset plate according to the holographic plate making data; s500, forming the holographic mould pressing plate containing the hologram on the metal nickel plate in an electroforming mode.
The invention embeds watermark information into the design pattern, shows the watermark information through the diffraction of the holographic microstructure, and generates the holographic mould pressing plate according to the holographic microstructure, thereby realizing the perfect integration of the digital watermark technology and the holographic technology, not only keeping the brightness and the aesthetic degree of the hologram, but also reducing the interference and the misjudgment rate of the hologram when identifying and extracting the watermark information, and greatly shortening the response time.
Further, the step S200 "pre-process the watermark image" further includes the steps of: s210, acquiring a noise point information graph of the watermark image; s220, carrying out channel separation on the noise information graph to obtain the gray level image of at least one channel.
Further, the step S300 "converting the processed watermark image into holography plate making data as the laser pattern or as a part of the laser pattern" further comprises the steps of: s310, obtaining the gray value of each pixel point of the gray image; s320, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph; s330, acquiring a grating angle value corresponding to the gray value of each pixel point of the gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the gray image belongs; s340, generating holographic plate making data according to the grating angle value of each pixel point of the acquired gray level image and the corresponding grating stripe frequency according to a preset rule.
Further, before the step S100, the method further includes the steps of:
and S000, pre-configuring the preset corresponding relation list.
Further, the step S100 "embed watermark information in the watermark region" further includes the steps of: and S110, embedding watermark information in at least one channel of the watermark image by adopting a preset watermark algorithm.
Further, the step S310 further includes, before the step S: s305, adjusting the gray scale threshold value of the gray scale image to be within a preset gray scale range.
Further, the predetermined gray scale range is 30 to 220.
Further, the spatial frequency parameter ranges from 200LP/mm to 1000 LP/mm.
The invention also discloses a device for manufacturing the holographic molded plate containing the watermark information, which uses the method for manufacturing the holographic molded plate containing the watermark information to manufacture the holographic molded plate containing the watermark information, and comprises the following steps: the watermark image generating module is used for embedding watermark information into the design graph and generating a watermark image containing the watermark information; the image preprocessing module is used for preprocessing the watermark image; the data conversion module is used for converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern; the hologram generating module is used for forming a hologram on the photoetching offset plate according to the holographic plate making data; and the die pressing plate manufacturing module is used for forming the holographic die pressing plate containing the hologram on the metal nickel plate in an electroforming mode.
The invention also discloses a holographic molded plate containing the watermark information, which is manufactured by using the manufacturing method of the holographic molded plate containing the watermark information.
Compared with the prior art, the holographic mould pressing plate is manufactured by the hologram containing the watermark information, the watermark information is combined with the hologram, the gray value of the watermark image corresponds to the grating angle value for photoetching, so that the hidden information is represented on the holographic microstructure, and the watermark information is hidden on the holographic microstructure, so that each holographic mould pressing plate has identifiability and can have a better anti-counterfeiting effect, the attractiveness and the brightness of the hologram are protected, the interference on the identification and the reading of the watermark information in the hologram is avoided, the limitation of the combined application of the two in the prior art is solved, the application range of the digital watermark is expanded, and a composite holographic anti-counterfeiting technology is added.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic diagram of the main steps of a method for manufacturing a holographic molding plate containing watermark information according to the present invention;
FIG. 2 is a schematic diagram of one embodiment of the present invention;
FIG. 3 is a schematic view of another embodiment of the present invention;
FIG. 4 is a schematic diagram of yet another embodiment of the present invention;
FIG. 5 is a schematic view of another embodiment of the present invention;
FIG. 6 is a schematic view showing the principal components of an apparatus for producing a hologram molding plate containing watermark information according to the present invention.
The reference numbers illustrate:
1. the system comprises a watermark image generation module 2, an image preprocessing module 3, a data conversion module 4, a hologram generation module 5 and a molded plate manufacturing module.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Fig. 1 is a schematic view showing the main steps of a method for manufacturing a holographic molded plate containing water print information according to the present invention, and as shown in fig. 1, the method for manufacturing a holographic molded plate containing water print information comprises the steps of: s100, embedding watermark information into the design graph to generate a watermark image containing the watermark information; s200, preprocessing the watermark image; s300, converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern; s400, forming a hologram on the photoetching offset plate according to the holographic plate making data; s500, forming the holographic mould pressing plate containing the hologram on the metal nickel plate in an electroforming mode.
Specifically, the design pattern can be an anti-counterfeiting mark or an anti-counterfeiting texture, and a brand-new anti-counterfeiting pattern image with attractive composition is designed by taking a LOGO, a pattern, character information and the like of a customer as design elements or materials and integrating factors such as anti-counterfeiting technical expression effect, mark manufacturing process requirements, dimension specifications and the like.
The holographic mould pressing plate is formed by embedding a laser pattern of watermark information, and the watermark information is expressed by diffraction of a holographic microstructure and has identifiability. The invention realizes the perfect integration of the digital watermarking technology and the holographic technology, not only can keep the brightness and the aesthetic degree of the hologram on the laser plate, but also reduces the interference and the misjudgment rate of the hologram when identifying and extracting the watermark information and greatly shortens the response time.
Preferably, the step S200 of "preprocessing the watermark image" further includes the steps of: s210, acquiring a noise point information graph of the watermark image; s220, carrying out channel separation on the noise information graph to obtain the gray level image of at least one channel.
The watermark information can be numbers, letters, even graphic patterns and the like in a digital secret information expression form, and the embedding of the watermark information in the design graph refers to the transformation of an image in a selected watermark area in the design graph through a specific watermark embedding algorithm, and the embedding of the watermark information in the image in the watermark area through a coding mode (encoding into 01 bits) can specifically be the transformation of a parameter value of a certain channel of the image.
The watermark embedding algorithm adopted by the invention is to embed watermark information into a certain channel of a design graph and then output the watermark image in an RGB mode, so that a gray image containing encrypted watermark information can be obtained only after the channel is separated. This step can also be omitted if the "watermark embedding software" existing in the prior art is a module with its own output mode conversion.
Preferably, the step S300 "converting the processed watermark image into holographic plate making data as the laser pattern or as a part of the laser pattern" further includes the steps of: s310, obtaining the gray value of each pixel point of the gray image; s320, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph; s330, acquiring a grating angle value corresponding to the gray value of each pixel point of the gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the gray image belongs; s340, generating holographic plate making data according to the grating angle value of each pixel point of the acquired gray level image and the corresponding grating stripe frequency according to a preset rule.
Preferably, before S100, the method further includes: and S000, pre-configuring the preset corresponding relation list.
Preferably, the step S100 "embedding watermark information in the design pattern to generate a watermark image containing the watermark information" further includes the steps of: and S110, embedding watermark information in at least one channel of the watermark image by adopting a preset watermark algorithm.
Specifically, the watermark information can be respectively embedded into 3 channels, the gray level image of each single channel is obtained in a channel separation mode, and the watermark information is embedded into the multiple channels, so that the anti-counterfeiting strength is increased.
Preferably, the step S310 further includes, before the step S: s305, adjusting the gray scale threshold value of the gray scale image to be within a preset gray scale range. Preferably, the preset gray scale range is 30 to 220.
The invention adjusts the gray scale threshold of the gray scale image by establishing the gradual change mapping model, and can also achieve the same effect by changing the color level. And is not particularly limited herein. The invention designs the gray value and the grating angle to be in one-to-one correspondence, so the gray value is the grating angle value, and further the direction of the diffraction light of the grating is controlled, and the diffraction light is adjusted to the preset gray scale range because the diffraction light of the grating in the range can be collected by the camera lens and then converted into an electric signal for operation. And diffraction light at grating angles outside this range cannot be collected by the camera, which becomes invalid information. Therefore, in order to record and restore the encrypted signal carried by the watermark image to the maximum extent, the gray scale threshold is preferably in the preset gray scale range.
Preferably, the spatial frequency parameter ranges from 200LP/mm to 1000 LP/mm.
The invention carries out region segmentation on the gray level image embedded with watermark information, and aims to set different spatial frequency parameters for different region graphs so as to realize different microstructure stripes and show rich colors.
Preferably, the grating angle value ranges from 0 degrees to 180 degrees.
Specifically, in the S340 of the present invention, the generating holographic plate-making data according to the grating angle value and the corresponding grating fringe frequency of each pixel point of the obtained gray-scale image according to a preset rule specifically includes:
1. when watermark information is only embedded in a single channel of a watermark image, a dot matrix is generated on the photoetching offset plate according to the number of pixel points of the gray level image and is used for point-by-point exposure. The method comprises the steps of acquiring a grayscale image of a channel in which watermark information is embedded, specifically acquiring a noise information map of the watermark image, and performing channel separation on the noise information map to acquire the grayscale image of the channel in which the watermark information is embedded.
Acquiring a gray value of each pixel point of the gray image, acquiring a grating angle value corresponding to the gray value of each pixel point according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the gray image belongs.
And photoetching the corresponding pixel points on the photoetching offset plate according to the grating angle value and the grating fringe frequency of each pixel point.
FIG. 2 is a schematic diagram of an embodiment of the present invention. As shown in fig. 2, a represents a pixel point of the gray image, a represents a pixel point of the photolithography offset plate, and when watermark information is embedded in a single channel, photolithography is performed on the pixel point a according to the grating angle value and the grating fringe frequency of the pixel point a of the gray image.
2. When watermark information is embedded into a plurality of channels of the watermark image, the number of pixel points on the photoetching plate is increased and is larger than the sum of the number of the pixel points of the plurality of channels. Taking two channels as an example, the following are specific:
acquiring grayscale images of two channels embedded with watermark information, specifically acquiring noise information maps of the watermark images, and performing channel separation on the noise information maps to respectively acquire the grayscale images of each channel.
Respectively obtaining the gray value of each pixel point in each gray image, obtaining the grating angle value corresponding to the gray value of each pixel point according to a preset corresponding relation list, and obtaining the grating stripe frequency corresponding to each pixel point according to the spatial frequency parameter corresponding to the regional graph to which each pixel point of the gray image belongs.
And increasing the number of pixel points on the photoetching offset plate to be the sum of the number of pixel points of the two gray level images. FIG. 3 is a schematic diagram of another embodiment of the present invention. As shown in fig. 3, a represents a pixel point of a first gray image, B represents a pixel point of another gray image, a, B, c, d represent a pixel point of a photolithography offset plate respectively, when watermark information is embedded in two channels, photolithography is performed on the pixel point a of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point a of the first gray image, photolithography is performed on the pixel point B of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point B of the another gray image, and the remaining pixel points c and d on the photolithography offset plate are vacant and are not subjected to photolithography. As can be seen from fig. 3, the resolution of the photoresist plate is 4 times the resolution of the gray scale image.
The above embodiments are merely two examples, including but not limited to the above two cases. If watermark information is embedded in the three channels, correspondingly, the resolution of the photoetching offset plate is only required to be improved, and the number of pixel points on the photoetching offset plate is larger than the sum of the pixel points of the three gray level images. FIG. 4 is a schematic diagram of another embodiment of the present invention. As shown in fig. 4, a represents a pixel point of a first gray image, B represents a pixel point of a second gray image, C represents a pixel point of a third gray image, a, B, C, d represent a pixel point of a photolithography offset plate respectively, when watermark information is embedded in three channels, photolithography is performed on the pixel point a of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point a of the first gray image, photolithography is performed on the pixel point B of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point B of the second gray image, photolithography is performed on the pixel point C of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point C of the third gray image, and the remaining pixel point d on the photolithography offset plate is vacant and is not subjected to photolithography.
FIG. 5 is a schematic diagram of another embodiment of the present invention. As shown in fig. 5, a represents a pixel point of the first gray image, B represents a pixel point of the second gray image, C represents a pixel point of the third gray image, a1, a2, a3, B1, B2, B3, C1, C2, and C3 are pixel points on the photolithography offset plate, the pixel point a of the first gray image is represented by three pixel points on the photolithography offset plate according to the grating angle value and the grating stripe frequency of the pixel point a of the first gray image on three pixel points a1, a2, and a3, and similarly, the pixel point a of the first gray image is represented by three pixel points on the photolithography offset plate according to the grating angle value and the grating stripe frequency of the pixel point B of the second gray image on three pixel points B1, B2, and B3, and the grating angle value and the grating stripe frequency of the pixel point C of the third gray image on three pixel points C1, C2, and C3.
It can be known from the above embodiments that the present invention does not specifically limit a pixel point for representing a gray image by using several pixel points on a lithography offset plate, and the pixel point is defined by itself according to actual needs.
Specifically, the structure of the diffraction grating in the hologram according to the present invention is not limited to the hologram technology, but may be formed by a method including various mechanical processing structures, chemical etching, a photomask technology, a semiconductor lithography technology, an ion lithography technology, an electron beam lithography technology, etc. which can generate or form grating structures of different angles and frequencies.
Meanwhile, in order to improve the aesthetic degree of the hologram, other anti-counterfeiting technical characteristics or grating microstructure information can be nested in the digital watermark hologram, and the application method is not limited to the method of separating graphic blocks, separating pixel filter points with various distribution proportions or superposing a multi-grating structure.
FIG. 6 is a schematic view showing the principal components of an apparatus for producing a hologram molding plate containing watermark information according to the present invention. As shown in fig. 6, the apparatus for manufacturing a holographic embossing plate containing watermark information, which manufactures a holographic embossing plate containing watermark information using the method for manufacturing a holographic embossing plate containing watermark information, includes: the watermark image generating module 1 is used for embedding watermark information into the design graph and generating a watermark image containing the watermark information; the image preprocessing module 2 is used for preprocessing the watermark image; the data conversion module 3 is used for converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern; a hologram generating module 4 for forming a hologram on the photolithography offset plate according to the holography plate-making data; and the die pressing plate manufacturing module 5 is used for forming the holographic die pressing plate containing the hologram on the metal nickel plate in an electroforming mode.
The invention also discloses a holographic molded plate containing the watermark information, which is manufactured by using the manufacturing method of the holographic molded plate containing the watermark information.
The holographic mould pressing plate is made of a hologram containing watermark information, hidden information is represented on a holographic microstructure through correspondence of the gray value of a watermark image and a grating angle value used for photoetching, each holographic mould pressing plate has identifiability, the attractiveness and brightness of the hologram are protected, interference in reading of the watermark information in the hologram is avoided, the limitation of combined application of the two in the prior art is solved, the application range of digital watermarking is expanded, and a composite holographic anti-counterfeiting technology is added. Can have better anti-counterfeiting effect.
It should be noted that the information interaction, execution process, and other contents between the modules in the apparatus are based on the same concept as the method embodiment, and specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method of making a holographic embossing plate containing imprinted information, comprising the steps of:
s100, embedding watermark information into the design graph to generate a watermark image containing the watermark information;
s200, preprocessing the watermark image;
s300, converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern;
s400, forming a hologram on the photoetching offset plate according to the holographic plate making data;
s500, forming a holographic mould pressing plate containing the hologram on the metal nickel plate in an electroforming mode;
wherein the step S200 of preprocessing the watermark image further includes the steps of:
s210, acquiring a noise point information graph of the watermark image;
s220, carrying out channel separation on the noise information graph to obtain a gray image of at least one channel;
the step S300 "converting the processed watermark image into holographic plate making data as a laser pattern or as a part of a laser pattern" further includes the steps of:
s310, obtaining the gray value of each pixel point of the gray image;
s320, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph;
s330, acquiring a grating angle value corresponding to the gray value of each pixel point of the gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the gray image belongs;
s340, generating holographic plate making data according to the grating angle value of each pixel point of the acquired gray level image and the corresponding grating stripe frequency according to a preset rule.
2. The method for manufacturing a holographic embossing plate containing watermark information as claimed in claim 1, wherein said step of S100 is preceded by the step of:
and S000, pre-configuring the preset corresponding relation list.
3. The method for manufacturing the holographic stereolithography plate containing watermark information according to claim 1, wherein said step S100 "embedding watermark information on the design pattern, generating the watermark image containing watermark information" further comprises the steps of:
and S110, embedding watermark information in at least one channel of the watermark image by adopting a preset watermark algorithm.
4. The method for manufacturing a holographic embossing plate containing watermark information according to claim 1, wherein said step S310 is preceded by the steps of:
s305, adjusting the gray scale threshold value of the gray scale image to be within a preset gray scale range.
5. The method for manufacturing the holographic embossing plate with watermark information as claimed in claim 4, wherein the predetermined gray scale range is 30 to 220.
6. The method of claim 1, wherein the spatial frequency parameter is in a range of 200LP/mm to 1000 LP/mm.
7. An apparatus for manufacturing a holographic embossing plate containing watermark information, which is characterized in that the method for manufacturing a holographic embossing plate containing watermark information according to any one of the claims 1 to 6 is used for manufacturing a holographic embossing plate containing watermark information, comprising:
the watermark image generating module is used for embedding watermark information into the design graph and generating a watermark image containing the watermark information;
the image preprocessing module is used for preprocessing the watermark image;
the data conversion module is used for converting the processed watermark image into holographic plate making data as a laser pattern or as a part of the laser pattern;
the hologram generating module is used for forming a hologram on the photoetching offset plate according to the holographic plate making data;
and the die pressing plate manufacturing module is used for forming the holographic die pressing plate containing the hologram on the metal nickel plate in an electroforming mode.
8. A hologram molding plate produced by the method for producing a hologram molding plate containing watermark information according to any one of claims 1 to 6.
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| CN1861394A (en) * | 2006-03-30 | 2006-11-15 | 上海市激光技术研究所 | Method for making moving-sensing picture-elements holographic maste mask pattern with multiple coding encrypting |
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| DE102012108170B4 (en) * | 2012-09-03 | 2015-01-22 | Bundesdruckerei Gmbh | Security element and method for producing a security element |
| CN104309355B (en) * | 2014-10-14 | 2016-10-05 | 中国机动车辆安全鉴定检测中心 | A kind of security protection Rotating fields for the new edition Hongkong and Macro contact pass and method |
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| CN1962287A (en) * | 2005-11-09 | 2007-05-16 | 四川大学 | Method for making multiple optical watermark |
| CN1861394A (en) * | 2006-03-30 | 2006-11-15 | 上海市激光技术研究所 | Method for making moving-sensing picture-elements holographic maste mask pattern with multiple coding encrypting |
| CN201950913U (en) * | 2010-12-22 | 2011-08-31 | 东莞虎彩印刷有限公司 | Laser holographic encryption anti-counterfeiting master plate |
| CN102914810A (en) * | 2012-10-11 | 2013-02-06 | 武汉华工图像技术开发有限公司 | Holographic motherboard manufacturing method and hologram based on moire fringe technology |
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