CN103412363A - Method for manufacturing polarization invisible images of near-infrared band - Google Patents
Method for manufacturing polarization invisible images of near-infrared band Download PDFInfo
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- CN103412363A CN103412363A CN2013103403349A CN201310340334A CN103412363A CN 103412363 A CN103412363 A CN 103412363A CN 2013103403349 A CN2013103403349 A CN 2013103403349A CN 201310340334 A CN201310340334 A CN 201310340334A CN 103412363 A CN103412363 A CN 103412363A
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Abstract
The invention discloses a method for manufacturing polarization invisible images of a near- infrared band. A plastic film with a polarized light effect is selected to be made into a carrier of the polarization invisible images of the near-infrared band, the carrier of the invisible images is combined on the surface of a polarized light reflecting layer, near-infrared covering ink is selected to cover an invisible image layer, a protective layer coats the invisible carrier, and the manufacturing of the polarization invisible images of the near-infrared band is completed. A hidden effect is that the hidden images cannot be identified by human eye under polarized light or natural light, the hidden images also cannot be identified under non-polarized light of the near-infrared band, and can only be detected and identified under polarized light of the near-infrared band by using a camera capable of imaging in the near-infrared band, and the hidden effect of the images is enhanced. The method for manufacturing the polarization invisible images of the near-infrared band is simple, manufacturing materials are easy to obtain, cost is low, and the method is especially suitable for information hiding and manufacturing of anti-fake elements which are used for merchandise anti-counterfeiting.
Description
Technical field
The invention belongs to Information hiding and field of anti-counterfeit technology, specifically, relate to a kind of polarization latent image method for making of near-infrared band.
Technical background
Any target of occurring in nature, in the process of reflection, scattering and transmission solar radiation, capital produces the polarization spectrum feature determined by himself character, the information that can provide classic method to obtain for being observed object by the polarization spectrum feature of obtaining object, these information are fully utilized, can effectively improve object detection and recognition performance.In Information hiding and false proof field, can utilize the polarization of material and spectral characteristic to realize hiding of image and information, and reappear stealthy image under certain condition.
In patent 200510137206.X, introduced a kind of method for making of latent image based on polarization technology, be mainly that the color that relies on the image hidden and image-carrier to manifest is different and color that manifest is identical realizes under polarized light under natural light, thus under natural light human eye can not the hiding image of identification and under polarized light human eye can distinguish the image of being hidden.Although effect more directly perceived, that its spectral characteristic that does not take full advantage of the hidden image carrier material is strengthened hiding.
In patent 201020174770.5, disclose a kind of spectral information hidden method, utilized the special spectrum of its spectrum false proof layer certain material to realize hiding of information, and then for false proof.But the information that this product is hidden must be under the light spectrum detecting apparatus that product carries could identification, improved cost and used difficulty, limited usable range.If the polarization characteristic of material and spectral characteristic are combined, can obtain and be better than the effect that single utilization polarization or spectral information are realized image concealing.
Summary of the invention
Deficiency for fear of the prior art existence, overcome Method of Steganography based on polarization or the spectral technique problem with regard to video picture under single testing conditions, the polarization latent image method for making of a kind of near-infrared band that the present invention proposes, purpose is to make a kind of near infrared polarization latent image, latent image is sightless under natural light, the image that only human eye can not identification be hidden under polarized light, only under polarized light and additional near-infrared light source, but use can be at the camera of the near-infrared band imaging image hidden of identification.
The technical solution adopted for the present invention to solve the technical problems is: selecting with the plastic sheeting of pulling method production is to make material, and use the heat sensitive process part to change the arrangement square formation of its free electron, make it remove polarization effect, and select near infrared to cover printing ink and spread upon the surface of latent image, thereby obtain the infrared polarization latent image needed.
The polarization latent image method for making of near-infrared band of the present invention, its characteristics are to comprise the following steps:
Step 1. selects to make material; Determine select plastic sheeting PE that pulling method produces or PET any as making the latent image carrier;
Step 2. is made the latent image layer; On the latent image carrier, press institute's hidden image content to the local transient heating of carrier, heating-up temperature is the critical temperature of carrier from solid-state to liquid; Be heated during heating disordered motion of regional molecule, the molecules align of upsetting pulling method production is neat, have the characteristic of polarization medium, makes it lose polarization effect and forms general thin, is the latent image layer;
Step 3. modulation silver slurry; The silver pulp material selects metallic aluminium powder and the modulation of common ink oil to form;
Step 4. is made the reflection of polarization layer; The polaroid back side on the photoelectricity screen is stamped to the silver slurry and be the reflection of polarization layer, mode of printing is usual manner, adopts gravure or screen printing;
Step 5. is the latent image layer gluing method of step 2, do not heat the reflection of polarization layer that is compound to step 4 without on silver-colored slurry face;
Step 6. is selected near infrared to cover printing ink and is covered on the latent image layer of step 2, and selected near infrared covers printing ink and only allows near infrared light to see through, and the light of other wave band can not see through, and is black under daylight; Adopt manual smearing or common printed method, namely complete the making of the polarization latent image of near-infrared band.
Beneficial effect
The polarization latent image method for making of a kind of near-infrared band that the present invention proposes, select and have the polarisation effect, and any of the plastic sheeting PE produced with pulling method or PET is made into the carrier of the polarization latent image of near-infrared band; The carrier of latent image is compound to the surface in polarized light reflection horizon, selects near infrared to cover printing ink and cover on the latent image layer, protective mulch on stealthy carrier, namely complete the making of the polarization latent image of near-infrared band.Concealment effect is the image that human eye can not identification be hidden under polarized light or natural light, near-infrared band without the image of can not identification under polarized light hiding, but only under the polarized light of near-infrared band, use, can, at the camera ability detection and identification of near-infrared band imaging, strengthen the concealment effect of image.Polarization latent image method for making of the present invention is simple, make material easily obtain, with low cost, be specially adapted to Information hiding and make Security element for commodity counterfeit prevention.
The accompanying drawing explanation
Below in conjunction with the polarization latent image method for making of drawings and embodiments to a kind of near-infrared band of the present invention, be described in further detail.
Fig. 1 is latent image carrier schematic diagram.
Fig. 2 is that the latent image on the latent image carrier is portrayed schematic diagram.
Fig. 3 is near infrared polarization latent image schematic diagram.
In figure:
1. latent image carrier 2. latent image layer 3. polaroid 4. silver slurry layer 5. near infrared cover ink layer
Embodiment
The present embodiment is a kind of polarization latent image method for making of near-infrared band.
Consult Fig. 1, Fig. 2, Fig. 3, select the plastic sheeting of pulling method production, by the local arrangement square formation that changes its free electron of heat sensitive process, make it produce polarization effect, and select near infrared covering printing ink to be coated in the surface of latent image, thereby obtain the image needed.
Application polarization latent image method for making is made a kind of polarization latent image of near-infrared band, and concrete steps are:
The first step, select to make material; Determine select plastic sheeting PE that pulling method produces or PET any as making the latent image carrier;
Second step, make the latent image layer; On the latent image carrier, press institute's hidden image content to the local transient heating of carrier, heating-up temperature is the critical temperature of carrier from solid-state to liquid; Heating can utilize laser engraving machine to carry out, by the image hidden input laser engraving machine, laser with the lines of image to the local transient heating 0.2-0.4 of image-carrier second; Be heated during heating disordered motion of regional molecule, the molecules align of upsetting pulling method production is neat, have the characteristic of polarization medium, makes it lose polarization effect and forms general thin, is the latent image layer;
The 3rd step, modulation silver slurry; The silver pulp material selects metallic aluminium powder and the modulation of common ink oil to form;
The 4th step, make the reflection of polarization layer; The polaroid back side on the photoelectricity screen is stamped to the silver slurry and be the reflection of polarization layer, mode of printing is usual manner, adopts gravure or screen printing;
The 5th step, by the latent image layer gluing method of second step, do not heat the reflection of polarization layer that is compound to the 4th step without on silver-colored slurry face;
The 6th step, select near infrared to cover printing ink and cover on the latent image layer of second step, and selected near infrared covers printing ink and only allows near infrared light to see through, and the light of other wave band can not see through, and is black under daylight; Adopt manual smearing or common printed method, namely complete the making of the polarization latent image of near-infrared band.
Claims (1)
1. the polarization latent image method for making of a near-infrared band is characterized in that comprising the following steps:
Step 1. selects to make material; Determine select plastic sheeting PE that pulling method produces or PET any as making the latent image carrier;
Step 2. is made the latent image layer; On the latent image carrier, press institute's hidden image content to the local transient heating of carrier, heating-up temperature is the critical temperature of carrier from solid-state to liquid; Be heated during heating disordered motion of regional molecule, the molecules align of upsetting pulling method production is neat, have the characteristic of polarization medium, makes it lose polarization effect and forms general thin, is the latent image layer;
Step 3. modulation silver slurry; The silver pulp material selects metallic aluminium powder and the modulation of common ink oil to form;
Step 4. is made the reflection of polarization layer; The polaroid back side on the photoelectricity screen is stamped to the silver slurry and be the reflection of polarization layer, mode of printing is usual manner, adopts gravure or screen printing;
Step 5. is the latent image layer gluing method of step 2, do not heat the reflection of polarization layer that is compound to step 4 without on silver-colored slurry face;
Step 6. is selected near infrared to cover printing ink and is covered on the latent image layer of step 2, and selected near infrared covers printing ink and only allows near infrared light to see through, and the light of other wave band can not see through, and is black under daylight; Adopt manual smearing or common printed method, namely complete the making of the polarization latent image of near-infrared band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103403349A CN103412363A (en) | 2013-08-06 | 2013-08-06 | Method for manufacturing polarization invisible images of near-infrared band |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103403349A CN103412363A (en) | 2013-08-06 | 2013-08-06 | Method for manufacturing polarization invisible images of near-infrared band |
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| CN103412363A true CN103412363A (en) | 2013-11-27 |
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| CN2013103403349A Pending CN103412363A (en) | 2013-08-06 | 2013-08-06 | Method for manufacturing polarization invisible images of near-infrared band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107798320A (en) * | 2017-11-20 | 2018-03-13 | 信利光电股份有限公司 | A kind of implicit pattern identification system and discrimination method |
| CN112622467A (en) * | 2020-12-18 | 2021-04-09 | 广州市人民印刷厂股份有限公司 | Preparation method of angle-dependent color-changing polarization hidden image-text |
Citations (5)
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|---|---|---|---|---|
| CN1359982A (en) * | 2000-12-21 | 2002-07-24 | 大日精化工业株式会社 | Near infrared reflection composite pigment |
| CN1996065A (en) * | 2005-12-31 | 2007-07-11 | 黄仁瑜 | Method for making polarizing invisible image by using heat sensitive process |
| JP2009031535A (en) * | 2007-07-27 | 2009-02-12 | Epson Toyocom Corp | Polarization converting device and manufacturing method of polarization converting device |
| US20100055350A1 (en) * | 2006-03-21 | 2010-03-04 | Ultradots, Inc | Luminescent Materials that Emit Light in the Visible Range or the Near Infrared Range |
| CN201754319U (en) * | 2010-11-10 | 2011-03-02 | 淄博泰宝防伪技术产品有限公司 | Spectrum anti-counterfeit label |
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2013
- 2013-08-06 CN CN2013103403349A patent/CN103412363A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359982A (en) * | 2000-12-21 | 2002-07-24 | 大日精化工业株式会社 | Near infrared reflection composite pigment |
| CN1996065A (en) * | 2005-12-31 | 2007-07-11 | 黄仁瑜 | Method for making polarizing invisible image by using heat sensitive process |
| US20100055350A1 (en) * | 2006-03-21 | 2010-03-04 | Ultradots, Inc | Luminescent Materials that Emit Light in the Visible Range or the Near Infrared Range |
| JP2009031535A (en) * | 2007-07-27 | 2009-02-12 | Epson Toyocom Corp | Polarization converting device and manufacturing method of polarization converting device |
| CN201754319U (en) * | 2010-11-10 | 2011-03-02 | 淄博泰宝防伪技术产品有限公司 | Spectrum anti-counterfeit label |
Non-Patent Citations (1)
| Title |
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| 王军民 等: "近红外吸收油墨与近红外吸收物质", 《中国防伪》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107798320A (en) * | 2017-11-20 | 2018-03-13 | 信利光电股份有限公司 | A kind of implicit pattern identification system and discrimination method |
| CN112622467A (en) * | 2020-12-18 | 2021-04-09 | 广州市人民印刷厂股份有限公司 | Preparation method of angle-dependent color-changing polarization hidden image-text |
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Application publication date: 20131127 |