CN102854788B - Method and system for generating holographic interference fringes and tag manufactured by method - Google Patents
Method and system for generating holographic interference fringes and tag manufactured by method Download PDFInfo
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- CN102854788B CN102854788B CN201110175625.8A CN201110175625A CN102854788B CN 102854788 B CN102854788 B CN 102854788B CN 201110175625 A CN201110175625 A CN 201110175625A CN 102854788 B CN102854788 B CN 102854788B
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Abstract
The invention provides a method and a system for generating holographic interference fringes and a tag manufactured by the method. The method includes generating an angle defining unit which comprises at least two pixels representing at least two interference fringe angles; filling selected areas of a bitmap by the angle defining unit to generate an angle graph; generating a density map defining the interference fringe density of the bitmap; and generating the holographic interference fringes of the bitmap by the density map and the angle graph. The selected areas are filled by the angle defining unit for defining various interference fringe angles, so that pixels in the selected areas can have various interference fringe angles, the finally generated holographic interference fringes corresponding to the selected areas can have large visual angles, and images of the selected areas can be observed within a large angular range under the condition with a light source.
Description
Technical field
The present invention relates to holographic imaging field, and the label particularly relating to a kind of method for generating various visual angles digital white light holographic interference fringes, system and utilize the method to make.
Background technology
Holographic technique utilizes interference and diffraction principle record and the technology of the true three dimensional image of reconstructed object, specifically can be divided into following two processes:
(1) hologram generative process: utilize principle of interference record object light-wave information, a part of laser is utilized to irradiate subject, to form the object beam of diffuse type, another part laser is as being mapped on holofilm with reference to light beam, interfere to superpose to produce with described object beam, the position phase of each point on object light wave and amplitude are converted to the intensity spatially changed, thus utilizes the contrast between interference fringe and interval to be recorded by the full detail of object light wave.The egative film that record interference fringe, after development, the handling procedure such as fixing, just becomes a hologram, or claims hologram.
(2) imaging reproducing processes: the grating that hologram is complicated just as, under coherent laser illumination, the diffraction light wave of the sinusoidal pattern hologram of a linear recording generally can provide two pictures, i.e. original image (also known as initial picture) and conjugate image.The image stereoscopic sensation reproduced is strong, has real visual effect.Every part of hologram all have recorded the optical information of each point on object, therefore its every part can reproduce the whole image of the original in principle, multiple different image can also be recorded on same egative film by multiexposure, multiple exposure, and can show respectively without interfering with each other.In brief, this process utilizes diffraction principle reconstructed object light-wave information.
Hologram is made up of the holographic interference fringes of different densities, different angles, and the density of holographic interference fringes determines color, and the angle of holographic interference fringes determines observed ray.Based on this principle, developed the holographic camera system of digital interference fringe at present, this system can according to digital image generation holographic interference fringes, and not traditional for another example optical table or dot matrix platform depend on laser like that and produce holographic interference fringes.
One digital picture can be converted into BMP gray bitmap and BMP Color Bitmap by the holographic camera system of above-mentioned digital interference fringe, and (this BMP refers to a kind of picture format, this picture format is well known in the art), this BMP gray bitmap and BMP Color Bitmap is utilized to generate holographic interference fringes afterwards, being reduced by this holographic interference fringes and recording finally is embossed on label substrate aluminizer, finally obtains the antifalsification label with described digital picture.But existing antifalsification label can only have good brightness when positive visual angle or part side view, and when other visual angle brightness are observed, brightness is very little, is difficult to differentiate digital picture on this label.
Summary of the invention
For solving the less defect of hologram visible angle scope that the holographic camera system of existing digital interference fringe makes, the present invention spy provides a kind of hologram that makes to observe in scope with great visual angle the method and system for generating holographic interference fringes that all can be observed image when there being light source.
The invention provides a kind of method for generating various visual angles digital white light holographic interference fringes, the method comprises: raw definition unit at angle, and this angle definition unit comprises at least 2 pixels, and these at least 2 pixels represent at least 2 kinds of interference fringe angles; Utilize the described constituency of angle definition unit to a bitmap to fill, generate angle figure; Generate the density map of the interference fringe density of the described bitmap of definition; And utilize described density map and angle figure, generate the holographic interference fringes of described bitmap.
Correspondingly, present invention also offers a kind of system for generating various visual angles digital white light holographic interference fringes, this system comprises: angle definition unit generation module, for raw definition unit at angle, comprise at least 2 pixels, these at least 2 pixels represent at least 2 kinds of interference fringe angles; Angle definition unit packing module, for utilizing the described constituency of angle definition unit to a bitmap to fill, generates angle figure; Density map generation module, for generating the density map of the interference fringe density utilizing described bitmap; And holographic interference fringes generation module, for utilizing described density map and angle figure, generate the holographic interference fringes in described constituency.
Correspondingly, the present invention also provides a kind of Inkless-printed label utilizing the method for above-mentioned generation various visual angles digital white light holographic interference fringes to make.
The present invention (is 0-180 degree at this interference fringe angular range defined by defining multiple interference fringe angle to employing one, two kinds of interference fringe angles within the scope of a kind of interference fringe angle defined within the scope of 0-180 degree is namely corresponding 0-360 degree, such as 0 degree is equal to 180 degree, 45 degree are equal to 225 degree, 90 degree are equal to 270 degree) angle definition unit to fill constituency, the pixel in this constituency can be made to have multiple interference fringe angle, the holographic interference fringes corresponding with this constituency finally produced can be made can to have larger visible angle, all can be observed the image in constituency described in this in polarizers of big angle scope when there being light source.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the process flow diagram of the method for generating various visual angles digital white light holographic interference fringes provided by the invention;
Fig. 2 is the process flow diagram of the other method for generating various visual angles digital white light holographic interference fringes provided by the invention;
Fig. 3 is the schematic diagram of density definition unit and angle definition unit;
The schematic diagram of the holographic interference fringes of Fig. 4 corresponding to the density definition unit shown in Fig. 3 and angle definition unit;
The schematic diagram of the specific implementation process of the method for generating various visual angles digital white light holographic interference fringes that Fig. 5 provides for invention;
Fig. 6 is the structural representation of the system for generating various visual angles digital white light holographic interference fringes provided by the invention; And
Fig. 7 is the structural representation of another system for generating various visual angles digital white light holographic interference fringes provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the process flow diagram of the method for generating various visual angles digital white light holographic interference fringes provided by the invention.As shown in Figure 1, the invention provides a kind of method for generating various visual angles digital white light holographic interference fringes, the method comprises: raw definition unit at angle, and this angle definition unit comprises at least 2 pixels, and these at least 2 pixels represent at least 2 kinds of interference fringe angles; Utilize the described constituency of angle definition unit to a bitmap to fill, generate angle figure; Generate the density map of the interference fringe density of the described bitmap of definition; And utilize described density map and angle figure, generate the holographic interference fringes of described bitmap.Constituency is filled by utilizing the angle definition unit defining multiple interference fringe angle, the pixel in this constituency can be made to have multiple interference fringe angle, the holographic interference fringes corresponding with this constituency finally produced can be made can to have larger visible angle, all can be observed the image in constituency described in this when there being light source in polarizers of big angle scope.Relevant angle definition unit and filling process thereof will be described in detail in the lump following.
Preferably, as shown in Figure 2, described generation density map comprises: generate a density definition unit, this density definition unit and described angle definition unit measure-alike, and comprising the pixel with described angle definition unit equal number, the plurality of pixel represents at least 2 kinds of interference fringe density that selection range is 1-750 line/mm; And utilize described density definition unit to fill described constituency, generate density map.By this, can organically blend to multi-angle, multi-density holographic interference fringes, the holographic interference fringes corresponding to constituency is made to be again Bai Youliang, because this color contrast of white light and label substrate aluminizer is very large, therefore by the printing of this holographic interference fringes to label substrate aluminizer, can reach the black and white contrast in conventional tags printing and image screening effect, precision prints tens times higher than conventional tags.
Fig. 3 is the schematic diagram of density definition unit and angle definition unit, the schematic diagram of the holographic interference fringes of Fig. 4 corresponding to the density definition unit shown in Fig. 3 and angle definition unit.Before the definition procedure introducing density definition unit and angle definition unit, first introduce content, to provide, the application is more clearly understood.
One digital picture can be converted into corresponding BMP gray bitmap and BMP Color Bitmap, and BMP Color Bitmap defines the density of the holographic interference fringes of this digital picture, and BMP gray bitmap defines the angle of the holographic interference fringes of this digital picture.The density of holographic interference fringes and angle are two large characteristics of this holographic interference fringes, by BMP gray bitmap and the BMP Color Bitmap of digital picture, just definable goes out density and the angle of the holographic interference fringes of this digital picture, thus can obtain the holographic interference fringes of this digital picture.
Below the corresponding relation between the gray scale of the corresponding relation between the color of BMP Color Bitmap and the density of holographic interference fringes and BMP gray bitmap and the angle of holographic interference fringes is described.
Specifically, red-orange-Huang-green-green grass or young crops-indigo plant-purple 7 look spectral colors are evenly corresponding to the holographic interference fringes that 700 lines/mm-1400 line/mm density is different successively, and density as corresponding in red R 255 G0 B0 is the holographic interference fringes of 700 lines/mm; The corresponding density of orange R255 G127 B0 is the holographic interference fringes of 814 lines/mm; The corresponding density of yellow R255 G255 B0 is the holographic interference fringes of 928 lines/mm; The corresponding density of green R255 G0 B0 is the holographic interference fringes of 1042 lines/mm; The corresponding density of cyan R255G255B0 is the holographic interference fringes of 1156 lines/mm; The like.Other different colours are with the holographic interference fringes of the corresponding different densities of this basic law.In BMP Color Bitmap all and between the density of the holographic interference fringes of this pixel there is relation one to one in the color of each pixel.
BMP gray bitmap has 256 gray scales, and this gray-scale value 127-0 uniform gray level covers the interference fringe angular range from 0 degree to 90 degree, and 255-127 uniform gray level covers the interference fringe angular range from 90 degree to 180 degree.A grey scale change of BMP gray bitmap changes corresponding to the angle of holographic interference fringes 0.703 degree, and such as, in BMP gray bitmap, the gray scale of a pixel is 0, then the angle of the holographic interference fringes corresponding to this pixel is 90 degree; In BMP gray bitmap, the gray scale of a pixel is 1, then the angle of the holographic interference fringes corresponding to this pixel is 89.297 degree; In BMP gray bitmap, the gray scale of a pixel is 2, then the angle of the holographic interference fringes corresponding to this pixel is 88.594 degree, by that analogy.In BMP gray bitmap all and between the angle of the holographic interference fringes of this pixel there is relation one to one in the gray scale of each pixel.
As shown in Figures 3 and 4, following steps can be adopted to generate density definition unit 1:(1) make the bitmap that comprises 4 pixels, the color value of these four pixels is respectively (from the pixel in the lower left corner, clock-wise order is followed successively by): R51 G51 B51, R102 G102 B102, R153 G153 B153, R204G204 B204; (2) setting interference fringe density range is 1-400 line/mm, according to the corresponding relation of above-mentioned color value and interference fringe density, the color value of four pixels and the corresponding relation of interference fringe density as follows:
R51 G51 B51 80 lines/mm;
R102 G102 B102 160 lines/mm;
R153 G153 B153 240 lines/mm;
R204 G204 B204 320 lines/mm;
By above step, one can be generated there are four kinds of different density definition units 1 of interfering fringe density.
Corresponding, following steps can be adopted to generate angle definition unit 2:(1) make the bitmap that comprises 4 pixels, the color value of these four pixels is respectively (from the pixel in the lower right corner, sequence counter-clockwise is followed successively by): R0 G0 B0, R64 G64 B64, R127 G127 B127, R191 G191 B191; (2) setting interference fringe angular range is 1-180 degree, according to the corresponding relation of above-mentioned color value and interference fringe angle, the color value of four pixels and the corresponding relation of interference fringe angle as follows:
R0 G0 B0 90 degree;
R64 G64 B64 45 degree;
R127 G127 B127 180 degree;
R191 G191 B191 135 degree;
By above step, one can be generated there are four kinds of different angle definition units 2 of interfering stripe angle.
Certainly, the density definition unit shown in above-mentioned Fig. 3 and Fig. 4 and angle definition unit are only an example, and density definition unit of the present invention and angle definition unit are not limited to above-mentioned definition mode.
For described density definition unit, too high interference fringe density can cause the holographic interference fringes rainbow effect of the bitmap finally generated heavier, too low interference fringe density can cause again the holographic interference fringes white brightness of the bitmap finally generated inadequate, preferably, described interference fringe density selection range is 1-460 line/mm, is more preferably 30-460 line/mm.
Preferably, described at least 2 kinds of interference fringe density are uniformly distributed in described selection range, and the difference of adjacent interference fringe density is the arbitrary value in 30-150 line/mm, and make the final holographic interference fringes generated both white by this, brightness is good again.Such as, described at least 2 kinds of interference fringe density can be respectively from 100 lines/mm, 200 lines/mm, 300 lines/mm and 400 lines/mm, or can select the 2-8 kind interference fringe density of adjacent interference fringe density difference equalization in 30 lines/mm, 60 lines/mm, 90 lines/mm, 120 lines/mm, 150 lines/mm, 180 lines/mm, 210 lines/mm, 240 lines/mm, 270 lines/mm, 300 lines/mm, 330 lines/mm, 360 lines/mm, 690 lines/mm, 420 lines/mm, 450 lines/mm.
Preferably, described at least 2 kinds of interference fringe angles are uniformly distributed in the selection range of 0-180 degree, and the difference of adjacent interference fringe angle is the arbitrary value in 30-90 degree, make the final holographic interference fringes generated comparatively evenly visible in 360 degree of full visual angles by this.Such as, described at least 2 kinds of interference fringe angles can be 0 degree and 90 degree, also can be 0 degree, 45 degree, 90 degree and 135 degree.
Preferably, described density definition unit has 4-64 pixel, and this 4-64 pixel represents 4-8 kind interference fringe density, and described angle definition unit has 4-64 pixel, and this 4-64 pixel represents 2-4 kind interference fringe angle.Herein, the pixel in density and angle definition unit too much can cause the final holographic interference fringes precision generated too high, and brightness reduces, because unit picture element is too small, interference fringe is too little, diffraction luminance shortage.Therefore the quantity of the pixel in density and angle definition unit is advisable with 4-64.
The schematic diagram of the specific implementation process of the method for generating various visual angles digital white light holographic interference fringes that Fig. 5 provides for invention, is described the specific implementation process of the method for generating various visual angles digital white light holographic interference fringes of the present invention below in conjunction with Fig. 4.
As shown in Figure 5, first, determine constituency for a bitmap 10, this constituency is the region needing to have various visual angles digital white light effect, can determine as required.Afterwards, utilize the density definition unit 1 shown in Fig. 3 and angle definition unit 2 to fill shown constituency respectively, generate density Figure 11 and angle Figure 12 respectively.Afterwards, utilize this density Figure 11 and angle Figure 12, generate the holographic interference fringes 20 of described bitmap 10.By method provided by the present invention, the final holographic interference fringes corresponding to described constituency generated can have the visual and effect that is Bai Youliang again of various visual angles.
Fig. 6 is the structural representation of the system for generating various visual angles digital white light holographic interference fringes provided by the invention.As shown in Figure 6, present invention also offers the system for generating various visual angles digital white light holographic interference fringes, this system comprises: angle definition unit generation module 110, for raw definition unit at angle, comprise at least 2 pixels, these at least 2 pixels represent at least 2 kinds of interference fringe angles; Angle definition unit packing module 120, for utilizing the described constituency of angle definition unit to a bitmap to fill, generates angle figure; Density map generation module 200, for generating the density map of the interference fringe density utilizing described bitmap; And holographic interference fringes generation module 300, for utilizing described density map and angle figure, generate the holographic interference fringes in described constituency.
Preferably, as shown in Figure 7, described density map generation module 200 comprises: density definition unit generation module 210, for generating a density definition unit, this density definition unit and described angle definition unit measure-alike, and comprising the pixel with described angle definition unit equal number, the plurality of pixel represents at least 2 kinds of interference fringe density that selection range is 1-750 line/mm; And density definition unit packing module 220, utilize described density definition unit to fill described constituency, generate density map.
Preferably, the selection range of described at least 2 kinds of interference fringe density is 1-460 line/mm, is more preferably 30-460 line/mm.
Preferably, described at least 2 kinds of interference fringe density are uniformly distributed in described selection range, and the difference of adjacent interference fringe density is the arbitrary value in 30-150 line/mm.
Preferably, described at least 2 kinds of interference fringe angles are uniformly distributed in the selection range of 0-180 degree, and the difference of adjacent interference fringe angle is the arbitrary value in 30-90 degree.
Preferably, described density definition unit has 4-64 pixel, and this 4-64 pixel represents 4-8 kind interference fringe density, and described angle definition unit has 4-64 pixel, and this 4-64 pixel represents 2-4 kind interference fringe angle.
Said system is corresponding with the method for generating various visual angles digital white light holographic interference fringes provided by the invention, therefore repeats no more its concrete details and advantage in this.
In addition, the present invention also provides a kind of Inkless-printed label utilizing the method for above-mentioned generation various visual angles digital white light holographic interference fringes to make, and this Inkless-printed label has the visible and effect that precision is high of various visual angles.
Generally speaking, the technical scheme of the application of the invention, organically blends to multi-angle, multi-density holographic interference fringes, can generate and have larger visible angle scope and the holographic interference fringes of Bai Youliang again.
Although the present invention is by disclosed in above-described embodiment, but above-described embodiment be not used to limit the present invention, any the technical staff in the technical field of the invention, without departing from the spirit and scope of the present invention, should do various variations and amendment.Therefore the scope that protection scope of the present invention should define with appended claims is as the criterion.
Claims (13)
1., for generating a method for various visual angles digital white light holographic interference fringes, it is characterized in that, the method comprises:
Raw definition unit at angle, this angle definition unit comprises at least 2 pixels, and these at least 2 pixels represent at least 2 kinds of interference fringe angles;
Utilize the described constituency of angle definition unit to a bitmap to fill, generate angle figure;
Generate the density map of the interference fringe density of the described bitmap of definition; And
Utilize described density map and angle figure, generate the holographic interference fringes of described bitmap,
Wherein, generate described density map to comprise:
Generate a density definition unit, this density definition unit and described angle definition unit measure-alike, and comprise the pixel with described angle definition unit equal number; And
Utilize described density definition unit to fill described constituency, generate density map.
2. method according to claim 1, is characterized in that, the pixel that described density definition unit comprises represents at least 2 kinds of interference fringe density that selection range is 1-750 line/mm.
3. method according to claim 2, is characterized in that, the selection range of described at least 2 kinds of interference fringe density is 1-460 line/mm.
4. method according to claim 2, is characterized in that, the selection range of described at least 2 kinds of interference fringe density is 30-460 line/mm.
5. the method any one of claim 2-4 described in claim, is characterized in that,
Described at least 2 kinds of interference fringe density are uniformly distributed in described selection range, and the difference of adjacent interference fringe density is the arbitrary value in 30-150 line/mm;
Described at least 2 kinds of interference fringe angles are uniformly distributed in the selection range of 0-180 degree, and the difference of adjacent interference fringe angle is the arbitrary value in 30-90 degree.
6. the method any one of claim 2-4 described in claim, it is characterized in that, described density definition unit has 4-64 pixel, this 4-64 pixel represents 4-8 kind interference fringe density, described angle definition unit has 4-64 pixel, and this 4-64 pixel represents 2-4 kind interference fringe angle.
7., for generating a system for various visual angles digital white light holographic interference fringes, it is characterized in that, this system comprises:
Angle definition unit generation module (110), for raw definition unit at angle, comprise at least 2 pixels, these at least 2 pixels represent at least 2 kinds of interference fringe angles;
Angle definition unit packing module (120), for utilizing the described constituency of angle definition unit to a bitmap to fill, generates angle figure;
Density map generation module (200), for generating the density map of the interference fringe density utilizing described bitmap;
Holographic interference fringes generation module (300), for utilizing described density map and angle figure, generates the holographic interference fringes in described constituency,
Wherein, described density map generation module (200) comprising:
Density definition unit generation module (210), for generating a density definition unit, this density definition unit and described angle definition unit measure-alike, and comprise the pixel with described angle definition unit equal number; And
Density definition unit packing module (220), for utilizing described density definition unit to fill described constituency, generates density map.
8. system according to claim 7, is characterized in that, the pixel that described density definition unit comprises represents at least 2 kinds of interference fringe density that selection range is 1-750 line/mm.
9. system according to claim 8, is characterized in that, the selection range of described at least 2 kinds of interference fringe density is 1-460 line/mm.
10. system according to claim 8, is characterized in that, the selection range of described at least 2 kinds of interference fringe density is 30-460 line/mm.
11. systems according to Claim 8 any one of-10 described in claim, is characterized in that,
Described at least 2 kinds of interference fringe density are uniformly distributed in described selection range, and the difference of adjacent interference fringe density is the arbitrary value in 30-150 line/mm;
Described at least 2 kinds of interference fringe angles are uniformly distributed in the selection range of 0-180 degree, and the difference of adjacent interference fringe angle is the arbitrary value in 30-90 degree.
12. systems according to Claim 8 any one of-10 described in claim, it is characterized in that, described density definition unit has 4-64 pixel, this 4-64 pixel represents 4-8 kind interference fringe density, described angle definition unit has 4-64 pixel, and this 4-64 pixel represents 2-4 kind interference fringe angle.
13. 1 kinds of Inkless-printed labels utilizing the method any one of claim 1-6 described in claim to produce.
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| KR101020583B1 (en) * | 2008-04-28 | 2011-03-09 | 주식회사 엠비젼 | Hologram optical inspection system |
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| GB0117391D0 (en) * | 2001-07-17 | 2001-09-05 | Optaglio Ltd | Optical device and method of manufacture |
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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 |
| KR101020583B1 (en) * | 2008-04-28 | 2011-03-09 | 주식회사 엠비젼 | Hologram optical inspection system |
| CN101504469A (en) * | 2009-03-13 | 2009-08-12 | 淄博泰宝防伪技术产品有限公司 | Hologram based on Moire fringe technology, and its plate making and identifying method |
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