CN104766537A - Laser scattering image display method based on micro-nano structure - Google Patents
Laser scattering image display method based on micro-nano structure Download PDFInfo
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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
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Abstract
The invention discloses a laser scattering image display method based on a micro-nano structure. The two-dimensional micro-nano structure with micron and nanometer scale features is provided, the direction of incident light is adjusted by means of the phase and amplitude information of the two-dimensional micro-nano structure, and a specific light scattering image and effect are formed. Meanwhile, by means of the technology and equipment using the method, the relevant micro-nano structure can be effectively formed on the surfaces of metal, plastic and other materials.
Description
Art
The invention discloses a kind of laser scattering imaging display packing based on micro-nano structure, it mainly has the two-dimentional micro-nano structure composition of micron, nanoscale features, utilize the position phase of two-dimentional micro-nano structure and the direction of amplitude information to incident light to regulate, form specific light scattering pattern and effect.The processing & machine tool adopting patented claim of the present invention to protect, can complete the valid shaping of relevant micro-nano structure at metal, plastics and other various material surface, can be widely used in the effectively false proof of gold and silver coin and the general goods such as cigarette, wine.
Background technology
From the nineties in last century, 3-D display, the technology such as false proof just obtain and develop rapidly, and mainly based on laser hologram, but this technology is semi-over, and antiforge function is challenged.In addition also had the technology such as such as watermark anti-counterfeiting also to develop for a long time, ultimate principle and implementation method also substantially understand by masses.In the urgent need to developing new anti-counterfeiting technology.
There has been proposed the amplification display method for anti-counterfeit based on optical principle, this side's ratio juris is: under normal lighting conditions, and the ultimate resolution of human eye is 1 point, and under distance of distinct vision 250mm condition, the ultimate resolution of human eye is 0.072mm for this reason.In general for making eyes not tired, the visual angle of human eye, at about 4 points, can resolution distance be namely two points of about 0.3mm.In the ordinary course of things, 10 × 10 stippled composition simple patterns, its size is about about 4mm × 4mm, and other tiny object must adopt magnifier or microscope to carry out amplifying and just can see its fine structure clearly.Must adopt the aids such as microscope for the pattern being less than this yardstick, this observation brings very big inconvenience.
Subsequently, people have developed again based on the three-dimensional of microlens array, Dynamic Announce and anti-counterfeiting technology, but above-mentioned technology is subject to the restriction of existing pixel dimension (150 microns), are difficult to obtain smooth Dynamic Announce effect and slim thickness.In like manner, in three-dimensional television, also there are the problems referred to above, adopt existing pixel, the display of 3-D view becomes phasic Chang with observation angle, and the Pixel Dimensions only having employing more small can obtain smooth Three-Dimensional Dynamic effect.
In order to overcome above-mentioned three point problem, we have proposed a kind of laser scattering imaging display packing based on micro-nano structure, it mainly has the two-dimentional micro-nano structure composition of micron, nanoscale features, utilize the position phase of two-dimentional micro-nano structure and the direction of amplitude information to incident light to regulate, form specific light scattering pattern and effect.Adopt the processing & machine tool of patented claim of the present invention protection simultaneously, the valid shaping of relevant micro-nano structure at metal, plastics and other various material surface can be completed.
summary of the invention:
Based on above-mentioned consideration, the present invention proposes a kind of laser scattering imaging display packing based on micro-nano structure.It mainly has the two-dimentional micro-nano structure composition of micron, nanoscale features, utilizes the position phase of two-dimentional micro-nano structure and the direction of amplitude information to incident light to regulate, forms specific light scattering pattern and effect.Adopt the processing & machine tool of patented claim of the present invention protection simultaneously, the valid shaping of relevant micro-nano structure at metal, plastics and other various material surface can be completed.
Structural solutions of the present invention is completed by following steps: a kind of laser scattering imaging display packing based on micro-nano structure, is characterized in that comprising the following steps:
Based on a laser scattering imaging display packing for micro-nano structure, be made up of the multiple unit periodic arrangement being arranged in plane, each unit comprises thousands of square subelements.
Further, square subelement has the different degree of depth, and the depth value that all subelement degree of depth are formed can be 2 depth values, i.e. 2 steps; Also can be multiple depth value, i.e. multiple step.
Further, unit depth value is relevant with the optical maser wavelength being incident on micro-nano structure surface, and the optical path difference that its highest subelement degree of depth and the minimum subelement degree of depth are formed is less than 3 laser wavelength of incidence.
Further, structure is reflection type structure, and the depth value that all subelement degree of depth are formed is 2 depth values, and namely during 2 steps, for reflection configuration, its step depth is specially λ/10 ~ λ, and representative value is λ/6 ~ λ/2, and λ is optical maser wavelength;
Further, micro-nano structure is transmissive type construction, and the depth value that all subelement degree of depth are formed is 2 depth values, and namely during 2 steps, for reflection configuration, its step depth is specially λ/2 ~ 2 λ, and representative value is λ/2/(n-1), n is Refractive Index of Material;
Further, after reflection-type micro-nano structure surface, the light after scattering is formed two target patterns by 2 step microstructures, and these two target patterns become approximate center Rotational Symmetry to distribute, and the surface of carrying reflection-type microstructure is plane;
Further, engraving source, Precision alignment systems, precise leveling system and accurate mobile system four part is comprised in the device making micro-nano structure;
Further, described engraving source can be superpower laser, mercury lamp and high energy ion beam etc., is mainly used in carrying out engraving to microstructure and is shaped; Described Precision alignment systems, precise leveling system, accurate mobile system are mainly used in accurately locating microstructure;
Further, described a kind of laser scattering imaging display packing based on micro-nano structure, the various complexity that can be shaped, dazzles beautiful laser image; Through but not limited to techniques such as direct engraving, electroforming, mold pressings, this micro-nano structure can be made in die surface, later stage, this mould is adopted to suppress, micro-nano structure can be suppressed in article surfaces such as gold and silver coin, ingot and plastics paper money, realize the gold and silver anti-counterfeiting product mass preparation carrying micro-nano structure; In addition, this structure also can be widely used in the articles of price such as jewel, also can be applied to the general goods such as cigarette, wine surface, plays effect that is false proof, display.
Principle of the present invention is: utilize two steps or multiple stage rank micro-nano structure to carry out Scattering from diffraction to incident laser, the laser be scattered carries out energy supposition in far field, and then forms the pattern of design;
The maximum feature of the present invention is: adopt irregular alignment, micro-nano-scale structure modulates incident laser position phase and amplitude, can reproduce the pattern of design, obtain garish display effect in far field.
Accompanying drawing explanation
Fig. 1 is micro-nano structure design frame chart in the embodiment of the present invention one;
Fig. 2 is the design result schematic diagram of micro-nano structure in the embodiment of the present invention one; Figure in figure in black box is 1 unit, and wherein gray scale represents the micro-nano structure degree of depth, and black is the darkest, white is the most shallow.
Fig. 3 is the pattern in Fig. 2 after unit amplification, and each square structure is a subelement.
Fig. 4 designs and the gold-silver coin die schematic diagram carrying micro-nano structure machined;
Fig. 5 is the display effect after laser is irradiated to sample surfaces micro-nano structure;
Fig. 6 designs in the embodiment of the present invention two and the micro-nano structure machined;
Fig. 7 is that in the embodiment of the present invention two, laser is irradiated to the display effect after micro-nano structure surface.
Embodiment
Embodiment 1, the display effect be applied in commemorative coin is laser scattering imaging microstructure design and the preparation of " Jian Nan Chun " and LOGO thereof, and optical maser wavelength is 500nm;
Design cycle is shown in Fig. 1, and first, selected " Jian Nan Chun " and LOGO thereof are as target display pattern; Using this pattern as input value, and set evaluation function and be: capacity usage ratio m>80%, display brightness conformity error K<5%, target pattern similarity 80%, and using the subelement position phase degree of depth produced at random as initially.On this basis, Vector Diffraction Theory is utilized to calculate mutually the position that all subelements are formed, the light distribution of computational reflect light far-field diffraction pattern, when diffraction pattern light distribution meets initial evaluation function in targeted graphical, export all subelement positions phase, forming unit design result; Otherwise subelement position carries out changing and continuous loop iteration mutually successively, until produce the subelement position phase meeting evaluation function, forming unit design result;
On this basis seamless, that zero lap splicing acquisition is final laser scattering imaging microstructure design result is carried out to Unit Design result; Complete design the results are shown in Figure 2, and Unit Design the results are shown in Figure each pore in 3, Fig. 3 and small particles is subelement, and color represents the degree of depth.
Next step, calculate relief depth, and because optical maser wavelength is 500nm, and this structure is false proof for gold and silver coin surface, and institute thinks reflective structure; Its degree of depth should be, between λ/6 ~ λ/2, get λ/5 as depth value, i.e. 500/5=100nm;
On this basis, laser beam and I.B.M. system is utilized to process this pattern at gold-silver coin die privileged site.First, utilize accurate mobile system and alignment system by accurate for gold-silver coin die translation and be accurately fixed on carrying platform, secondly, utilizing luminous energy or ion and atomic kinetic energy at die surface ad-hoc location, process the micro-nano structure of needs.Fig. 4 is shown in by related die schematic diagram, and in figure, grey quadrilateral is laser scattering imaging micro-nano structure district.
Adopt this mould to suppress a gold and silver cake, the laser scattering imaging micro-nano structure of needs can be carried in gold and silver coin surface; Adopt 500nm laser pen to irradiate this region and can reflect to form the pattern shown in Fig. 5;
Embodiment 2, the display effect be applied in plastics coin is laser scattering imaging microstructure design and the preparation of " Jian Nan Chun ", and optical maser wavelength is 632.8nm;
Design cycle is shown in Fig. 1, and first, selected " Jian Nan Chun " is as target display pattern; Using this pattern as input value, and set evaluation function and be: capacity usage ratio m>90%, display brightness conformity error K<5%, target pattern similarity 90%, and using the subelement position phase degree of depth produced at random as initially.On this basis, Vector Diffraction Theory is utilized to calculate mutually the position that all subelements are formed, the light distribution of computational reflect light far-field diffraction pattern, when diffraction pattern light distribution meets initial evaluation function in targeted graphical, export all subelement positions phase, forming unit design result; Otherwise subelement position carries out changing and continuous loop iteration mutually successively, until produce the subelement position phase meeting evaluation function, forming unit design result;
On this basis seamless, that zero lap splicing acquisition is final laser scattering imaging microstructure design result is carried out to Unit Design result; Unit Design the results are shown in Figure each pore in 6, Fig. 6 and small particles is subelement, and color represents the degree of depth.
Next step, calculate relief depth, and because optical maser wavelength is 632.8nm, and this structure is false proof for plastics coin surface, and institute thinks transmission-type structure; Suppose that plastics coin refractive index is that its optimum depth of n=1.5 should for λ/2/(n-1), i.e. 632.8nm;
On this basis, laser beam and I.B.M. system is utilized to process this pattern at mould privileged site.First, utilize accurate mobile system and alignment system by accurate for mould translation and be accurately fixed on carrying platform, secondly, utilizing luminous energy or ion and atomic kinetic energy at die surface ad-hoc location, process the micro-nano structure of needs.Adopt this mould to suppress plastics coin, the laser scattering imaging micro-nano structure of needs can be carried in plastics coin surface; Adopt 632.8nm laser pen to irradiate this region and transmission can form the pattern shown in Fig. 7.
Claims (9)
1. based on a laser scattering imaging display packing for micro-nano structure, be made up of the multiple unit periodic arrangement being arranged in plane, each unit comprises thousands of square subelements.
2. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 1, is characterized in that: square subelement has the different degree of depth, and the depth value that all subelement degree of depth are formed can be 2 depth values, i.e. 2 steps; Also can be multiple depth value, i.e. multiple step.
3. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 2, it is characterized in that: subelement depth value is relevant with the optical maser wavelength being incident on micro-nano structure surface, the optical path difference that its highest subelement degree of depth and the minimum subelement degree of depth are formed is less than 3 laser wavelength of incidence.
4. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 2, it is characterized in that: when micro-nano structure is reflection type structure, the depth value that all subelement degree of depth are formed is 2 depth values, namely during 2 steps, for reflection configuration, its step depth is specially λ/10 ~ λ, and representative value is λ/6 ~ λ/2, and λ is laser wavelength of incidence.
5. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 2, it is characterized in that: when micro-nano structure is transmissive type construction, the depth value that all subelement degree of depth are formed is 2 depth values, namely during 2 steps, for reflection configuration, its step depth is specially λ/2 ~ 2 λ, and representative value is λ/2/(n-1), n is Refractive Index of Material.
6. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 1, it is characterized in that: after laser is irradiated to reflection-type micro-nano structure surface, light after scattering is formed two target patterns by 2 step microstructures, and these two target patterns become approximate center Rotational Symmetry to distribute, the surface of carrying reflection-type microstructure is plane.
7. based on a laser scattering imaging display packing for micro-nano structure, it is characterized in that: the device for making micro-nano structure comprises engraving source, Precision alignment systems, precise leveling system and accurate mobile system four part.
8. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 4, is characterized in that: described engraving source can be superpower laser, mercury lamp and high energy ion beam etc., is mainly used in carrying out engraving to microstructure and is shaped; Described Precision alignment systems, precise leveling system, accurate mobile system are mainly used in accurately locating microstructure.
9. a kind of laser scattering imaging display packing based on micro-nano structure according to claim 1, the various complexity that can be shaped, dazzles beautiful laser image; Through but not limited to techniques such as direct engraving, electroforming, mold pressings, this micro-nano structure can be made in die surface, later stage, this mould is adopted to suppress, micro-nano structure can be suppressed in article surfaces such as gold and silver coin, ingot and plastics paper money, realize the gold and silver anti-counterfeiting product mass preparation carrying micro-nano structure; In addition, this structure also can be widely used in the articles of price such as jewel, also can be applied to the general goods such as cigarette, wine surface, plays effect that is false proof, display.
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Cited By (3)
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| CN106328470A (en) * | 2016-08-31 | 2017-01-11 | 北京埃德万斯离子束技术研究所股份有限公司 | Method for manufacturing micro-nano anti-counterfeiting image-text trademark on workpiece |
| CN110520902A (en) * | 2017-03-30 | 2019-11-29 | 韩国斯诺有限公司 | To the method and device of image application dynamic effect |
| CN111024042A (en) * | 2019-12-11 | 2020-04-17 | 四川云盾光电科技有限公司 | Reflection type object positioning and identifying system based on DOE optical chip |
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| CN111024042B (en) * | 2019-12-11 | 2022-01-11 | 四川云盾光电科技有限公司 | Reflection type object positioning and identifying system based on DOE optical chip |
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Application publication date: 20150708 |