CN105405359A - Optical color change device with watermark characteristic - Google Patents
Optical color change device with watermark characteristic Download PDFInfo
- Publication number
- CN105405359A CN105405359A CN201511008944.4A CN201511008944A CN105405359A CN 105405359 A CN105405359 A CN 105405359A CN 201511008944 A CN201511008944 A CN 201511008944A CN 105405359 A CN105405359 A CN 105405359A
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- grating
- watermark
- watermarking images
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
Abstract
The invention relates to an optical color change device with a watermark characteristic, is mainly applied to identification card anti-counterfeiting and belongs to the technical field of holographic anti-counterfeiting. The optical color change device is composed of sub-wavelength grating of the same frequency, the sub-wavelength grating comprises a watermark image area and a shielding area surrounding the watermark image area, the optical grating in the watermark image area has a certain deviation angle relative to the optical grating in the shielding area, and the watermark in the watermark image area is made to emerge and disappear by changing the deviation angle of the sub-wavelength grating in the watermark image area. According to the optical color change device, by changing and controlling the deviation angle of the optical grating in the watermark image area, the watermark image area can be different from the surrounding shielding area, and an optical anti-counterfeiting device with a special visual effect is obtained; the appearance of the color change device can have the orthogonal color change effect achieved by ordinary sub-wavelength grating as well as the watermark characteristic effect; the appearance feature is obvious, visual anti-counterfeiting is conducted easily, and the optical color change device is applicable to certificate anti-counterfeiting.
Description
[technical field]
The present invention relates to a kind of optic metachromatic device with watermark feature, be mainly used in card false proof, belong to holographic security technology field.
[background technology]
Holographic false proof is developed so far, and becomes increasingly complex various, and new anti-counterfeiting technology is constantly weeded out the old and bring forth the new, and the past, some anti-counterfeiting technology thresholds also reduced gradually, and these technology are inevitable also can its anti-counterfeit capability of forfeiture slowly.
What be mainly used to protect on the film certificate such as I.D., passport, safety guarantee card because card is false proof is false proof; therefore require higher to anti-counterfeiting technology; the false proof one side of existing card cannot produce best image effect, and another aspect is easy to be replicated by replicated surfaces concaveconvex shape.
In addition, common digital watermark manufactures using paper as carrier, is generally only applicable to the papery such as currency and security false proof, cannot be applied to film false proof above.
And it is also essential for needing again because card is false proof to have good visual effect concurrently, this also increases the threshold of anti-counterfeiting technology.Again in conjunction with its requirement to film material and typography, some holographic security technologies be difficult to perfectly to be applied to its card false proof on.
[summary of the invention]
For above-mentioned problems of the prior art, the object of the present invention is to provide the optic metachromatic device with watermark feature, the optical anti-counterfeiting device with special visual effect can be realized.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of optic metachromatic device with watermark feature, be made up of the sub-wave length grating of same frequency, described sub-wave length grating comprises the shielding region around watermarking images region and watermarking images region, described watermarking images region grating has certain deflection angle relative to screening the grating in region around it, and by changing the deflection angle of watermarking images region sub-wave length grating, make the watermark in watermarking images region occur or disappear.
Further, the deflection angle of described watermarking images region grating is relative to the grating screening region around it, and its range of deflection angles controls between 2 ° ~ 10 °.
Further, when incident ray is incident to this Electrochromic device surface with the angular range of 45 ° ~ 60 °, and when observing with angle symmetrical with it, its surface integral takes on a red color or green, watermarking images region and redness or the green of around it, screening region can produce same wavelength, watermarking images is hidden in wherein, cannot identification.
Further, when observing watermarking images, incident ray and this Electrochromic device plane are minimum angle, and its angular range is 0 ~ 10 °, and viewing angle is between 90 ° ~ 100 °, and the grating picture and text with watermark effect just can manifest.
Further, described watermarking images area size is less than shielding area size.
Further, the content in described watermarking images region is character or figure, and shape is without limited.
Further, described sub-wave length grating is block structure.
Further, described optic metachromatic device makes it be attached on PET film with UV solidification or mould pressing process.
Further, described sub-wave length grating is present among small picture dot.
Further, described pixel has been embedded in micro text.
Beneficial effect of the present invention, the present invention, by changing and controlling the deflection angle of watermarking images region grating, makes it be different from and screens region around, realizes the optical anti-counterfeiting device with special visual effect.Make Electrochromic device of the present invention in appearance except having orthogonal color changeable effect that common sub-wave length grating has, also have watermark feature effect concurrently simultaneously.Its external appearance characteristic is obvious, is easy to vision false proof, is suitable for the application of certificate false proof.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above-mentioned purpose of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
[accompanying drawing explanation]
Fig. 1 is light schematic diagram when observing Electrochromic device of the present invention with normal viewing angle.
The light schematic diagram that Fig. 2 is incident ray and Electrochromic device plane of the present invention when being minimum angle.
When Fig. 3 is for observing Electrochromic device of the present invention with normal viewing angle, watermark region image concealing, cannot the schematic diagram of identification in wherein.
Fig. 4 is incident ray and Electrochromic device plane of the present invention shows the grating picture and text schematic diagram of watermark feature when being minimum angle.
Fig. 5 is the schematic diagram that sub-wave length grating of the present invention is present in small picture dot.
[embodiment]
For further setting forth the present invention for the technological means reaching predetermined object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the embodiment with the optic metachromatic device of watermark feature proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.
A kind of optic metachromatic device with watermark feature of the present invention, be made up of the sub-wave length grating 1 of same frequency, described sub-wave length grating 1 comprises the shielding region 2 around watermarking images region 3 and watermarking images region.Described watermarking images region grating has certain deflection angle relative to screening the grating in region around it, and by changing the deflection angle of watermarking images region sub-wave length grating, makes the watermark in watermarking images region occur or disappear.
Described sub-wave length grating is the grating of one-period less of the wavelength of light, and adopt bulk form to present, its size is adapted to technique on request, there is no strict restriction.
Due to the orthogonal color shifting properties of sub-wave length grating, specifically, observe this device with normal viewing angle, its surperficial 1 entirety takes on a red color (or green), is rotated to vertical direction, be then converted to green (or red).As shown in Figure 1.
As shown in Figure 3, when carrying out normal angled observation to watermarking images region 3, with the redness (or green) of screening region 2 can produce same wavelength around it, therefore watermarking images can be hidden in wherein, cannot identification.But when incident ray and this device plane are minimum angle, namely when light irradiates with angle excursion, specifically observe to be approximately perpendicular to device surface, the grating picture and text with watermark effect just can manifest.As shown in Figures 2 and 4.
Above-mentioned normal viewing angle observes this Electrochromic device, refers to that light is incident to this Electrochromic device surface with the angular range of 45 ° ~ 60 °, and observes with angle symmetrical with it.
During above-mentioned observation watermarking images, incident ray and this Electrochromic device plane are minimum angle, and its angular range is 0 ~ 10 °, and viewing angle is between 90 ° ~ 100 °.
The deflection angle 5 of described watermarking images region grating is relative to the grating angle 4 screening region around it, and its range of deflection angles controls to have good stealthy effect between 2 ° ~ 10 °.
The size in described watermarking images region 3 must be less than shielding region 2 size.And the content of watermarking images is character or figure, and shape is then without limited.
Described Electrochromic device makes it be attached on PET film with techniques such as UV solidification or mold pressings, also can be other types membraneous material.
Described sub-wave length grating is present among small picture dot, because picture dot size determines the resolution of this Electrochromic device.Specifically, pixel is less, and resolution is higher; Otherwise it is lower.It is good that described picture dot size employing is less than 0.1mm.Its shape can be square, also can be other shapes, as shown in Figure 5.Also can embed micro text in pixel, false proof grade can be improved further.
The above; be only the detailed description realizing the specific embodiment of the invention of instructions description of the present invention and graphic; unrestricted for illustration; but feature of the present invention is not limited thereto; those skilled in the art obviously understand; all scopes of the present invention should be as the criterion with the protection domain of its claim; under the prerequisite not deviating from invention spirit that appended claims defines and invention scope; the change similar with it of all spirit according to the present invention and other embodiment implemented, all should be included among protection category of the present invention.
Claims (10)
1. one kind has the optic metachromatic device of watermark feature, it is characterized in that: described Electrochromic device is made up of the sub-wave length grating of same frequency, described sub-wave length grating comprises the shielding region around watermarking images region and watermarking images region, described watermarking images region grating has certain deflection angle relative to screening the grating in region around it, and by changing the deflection angle of watermarking images region sub-wave length grating, make the watermark in watermarking images region occur or disappear.
2. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: the deflection angle of described watermarking images region grating is relative to the grating angle screening region around it, and its range of deflection angles controls between 2 ° ~ 10 °.
3. the optic metachromatic device with watermark feature according to claim 1, it is characterized in that: when incident ray is incident to this Electrochromic device surface with the angular range of 45 ° ~ 60 °, and when observing with angle symmetrical with it, its surface integral takes on a red color or green, watermarking images region and redness or the green of around it, screening region can produce same wavelength, watermarking images is hidden in wherein, cannot identification.
4. the optic metachromatic device with watermark feature according to claim 3, it is characterized in that: when observing watermarking images, incident ray and this Electrochromic device plane are minimum angle, its angular range is 0 ~ 10 °, and viewing angle actual be between 90 ° ~ 100 °, the grating picture and text with watermark feature just can manifest.
5. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: described watermarking images area size is less than shielding area size.
6. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: the content in described watermarking images region is character or figure.
7. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: described sub-wave length grating is block structure.
8. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: described optic metachromatic device makes it be attached on PET film with UV solidification or mould pressing process.
9. the optic metachromatic device with watermark feature according to claim 1, is characterized in that: described sub-wave length grating is present among small picture dot.
10. the optic metachromatic device with watermark feature according to claim 9, is characterized in that: described pixel has been embedded in micro text.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008944.4A CN105405359B (en) | 2015-12-29 | 2015-12-29 | A kind of optic metachromatic device with watermark feature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008944.4A CN105405359B (en) | 2015-12-29 | 2015-12-29 | A kind of optic metachromatic device with watermark feature |
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| Publication Number | Publication Date |
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| CN105405359A true CN105405359A (en) | 2016-03-16 |
| CN105405359B CN105405359B (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511008944.4A Active CN105405359B (en) | 2015-12-29 | 2015-12-29 | A kind of optic metachromatic device with watermark feature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023281A (en) * | 2016-05-23 | 2016-10-12 | 阙云 | Manufacture method of grating developed image |
| CN109561182A (en) * | 2018-12-25 | 2019-04-02 | 华为终端有限公司 | A kind of diaphragm, terminal shell and terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306615A (en) * | 2008-07-11 | 2008-11-19 | 公安部交通管理科学研究所 | Anti-counterfeiting structure for running license and recognizing process thereof |
| JP2010197798A (en) * | 2009-02-26 | 2010-09-09 | Toppan Printing Co Ltd | Optical element having forgery prevention function and forgery prevention display body equipped with the same |
| CN102418302A (en) * | 2011-10-21 | 2012-04-18 | 苏州大学 | Safety paper with optical invisible watermarks |
| CN103901517A (en) * | 2014-03-13 | 2014-07-02 | 深圳大学反光材料厂 | Anti-fake grating, anti-fake trademark, hot stamping film and composite film |
| CN104166248A (en) * | 2014-08-12 | 2014-11-26 | 深圳大学 | Multicolor optical modulator based on sub-wavelength optical grating structure and implementation method of multicolor optical modulator |
-
2015
- 2015-12-29 CN CN201511008944.4A patent/CN105405359B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306615A (en) * | 2008-07-11 | 2008-11-19 | 公安部交通管理科学研究所 | Anti-counterfeiting structure for running license and recognizing process thereof |
| JP2010197798A (en) * | 2009-02-26 | 2010-09-09 | Toppan Printing Co Ltd | Optical element having forgery prevention function and forgery prevention display body equipped with the same |
| CN102418302A (en) * | 2011-10-21 | 2012-04-18 | 苏州大学 | Safety paper with optical invisible watermarks |
| CN103901517A (en) * | 2014-03-13 | 2014-07-02 | 深圳大学反光材料厂 | Anti-fake grating, anti-fake trademark, hot stamping film and composite film |
| CN104166248A (en) * | 2014-08-12 | 2014-11-26 | 深圳大学 | Multicolor optical modulator based on sub-wavelength optical grating structure and implementation method of multicolor optical modulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023281A (en) * | 2016-05-23 | 2016-10-12 | 阙云 | Manufacture method of grating developed image |
| CN109561182A (en) * | 2018-12-25 | 2019-04-02 | 华为终端有限公司 | A kind of diaphragm, terminal shell and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105405359B (en) | 2018-05-22 |
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