CN110133847A - A design method of non-array dynamic display anti-counterfeiting graphics based on microstructure - Google Patents

Abstract

The invention discloses a design method for non-array dynamic display anti-counterfeiting graphics based on microstructure, including: (1) design of micrographic array; (2) amplification of micrographic array unit; (4) rearrangement of the micrographic array. Finally, the designed dynamic graphics are displayed by using the microlens array in the same arrangement as the micrographic array as a decoding chip. The invention has a unique visual effect, in addition to displaying non-arrayed unit graphics, it can also make dynamic graphics disappear or emerge as the viewing angle changes.

Description

A design method of non-array dynamic display anti-counterfeiting graphics based on microstructure

technical field

The invention relates to a design method for dynamically displaying anti-counterfeit graphics based on a microlens array and a micrographic array. The design method utilizes pixel collection and rearrangement, and the rearranged micrographic array formed can be displayed by the microlens array. The dynamic graphics designed by this method have unique effects, which can display graphics units instead of graphics arrays. Secondly, dynamic graphics can emerge or disappear with the change of viewing angle. The structure can be used to increase the attractiveness of commodities or to prevent counterfeiting of commodities.

Background technique

Due to its small size, light weight, and easy integration, the microlens array can realize many functions that cannot be realized by traditional optical components. With the development of microprocessing technology, microlens arrays have been used in optical information processing, optical computing, optical data transmission and other fields. There are many ways to make microlens arrays, and the processing technology of microlens array components is also constantly improving, such as ion exchange, electron beam direct writing, photolithography, etching, replication technology and so on.

When two gratings with slightly different spatial frequencies are superimposed together, the fringes formed by the difference frequency components are called Moiré fringes. When the two gratings move relative to each other, the moiré fringes also move. Moiré fringes have become an optical anti-counterfeiting technology and have been reported by many articles. However, many moiré patterns are limited to fringe patterns formed by gratings. The design is simple, and the pattern movement method is single, which is greatly limited in practical application.

In order to further develop moiré technology, microlens arrays and micro-pattern arrays have appeared in the prior art to form multi-pattern dynamic graphics. The effect is higher than that of moiré patterns formed by gratings, and the patterns are more abundant. The preparation technology requires It is also higher, and its use on anti-counterfeiting labels can often achieve an effect that is difficult to imitate. However, the traditional dynamic display anti-counterfeiting graphics are all arrayed graphics, which is closely related to the design of its micro graphics. When people want to obtain a single graphic (non-arrayed), the traditional dynamic graphic design method cannot meet the requirements. Therefore, the function of the present invention is to break the limitation of traditional array display of dynamic graphics. While obtaining non-arrayed dynamic graphics, it has a unique display effect, and the graphics can appear and disappear with the change of viewing angle.

Contents of the invention

The purpose of the present invention is to propose a non-arrayed design method for dynamically displaying anti-counterfeiting graphics. Based on the traditional micro-graphic array, a unique micro-graphic array design method is used to collect and rearrange the graphics, and finally cooperate with the micro-lens array. , to get non-arrayed dynamic graphics. Patterns appear and disappear as the viewing angle changes. Compared with the existing optical dynamic graphics, it has distinct characteristics, the content and size of the pattern are not limited, and the requirements for design and preparation technology are relatively high. This structure can be used in commodity packaging and anti-counterfeiting fields.

The technical solution adopted by the present invention is: a design method for dynamically displaying anti-counterfeiting graphics based on a non-array microstructure, comprising the following steps:

Step (1), the design of the micro-pattern array: the original micro-pattern array period is t, and the unit pattern width and height are w and h respectively;

Step (2), enlargement of the micro-pattern array unit: the width w and the height h of the unit figure are enlarged to W and H respectively;

Step (3), collection of micro-graphic array unit pixels: adopt a hole with the same aperture size as the micro-lens array unit to collect the enlarged micro-graphic unit; start collecting from the lower left corner or upper right corner of the enlarged graphic, the actual The starting point depends on the period of the microlens array and the period size of the micrographic array; when the micrographic array period t is less than the microlens array period p, the starting point of the collection process is the lower left corner of the enlarged micrographic unit; when the micrographic array period t When it is greater than the period p of the microlens array, the starting point of the acquisition process is the upper right corner of the enlarged micro-graphic unit; each acquisition, the position of the acquisition moves the moving distance until all positions of the graphic are collected; the acquisition hole is in the horizontal direction and the distance of each movement in the vertical direction are:

_Δh = (i-1)·(pt)

_Δv = (j-1)·(pt)

Step (4), rearranging the images collected each time according to the arrangement of the microlens array.

Among them, the specific steps of rearranging the graphics collected each time according to the arrangement of the microlens array are: after each collection, the graphics b _ij left in the quadrilateral collection holes will be placed in a new periodic array, Its period size is consistent with the period size of the microlens array, and the coordinates of b _ij placed in the corresponding position in the new array are:

b _ij ＝(p·(i-1),p·(j-1))

The beneficial effect of the present invention is to provide a novel dynamic display method, which enhances the visual experience of human eyes. On the other hand, its design and preparation are technical and difficult to be imitated.

Description of drawings

Fig. 1 is a microstructure schematic diagram of the present invention, wherein, 101 is a microlens array, 102 is a micrographic array, and 103 is a dynamic pattern;

Fig. 2 is the schematic diagram of microlens array of the present invention, and the period of microlens array is 50 μ m;

Fig. 3 is a schematic diagram of the design process of the micro graphic array.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The present invention is a microstructure-based non-array dynamic design method for displaying anti-counterfeiting graphics, comprising:

Step (1), design of the micropattern array. The period of the micro pattern array is t, and the width and height of the unit pattern are w and h respectively.

Step (2), enlargement of the micro graphic array unit. The width and height w and h of the unit figure are enlarged to W and H, respectively.

Step (3), collecting the pixels of the micro graphic array unit. A hole with the same aperture size as the microlens array unit is used to collect the enlarged micro pattern unit. Acquisition starts from the lower left or upper right corner of the magnified pattern, and the actual starting point depends on the period of the microlens array and the period of the micropattern array. When the period t of the micrographic array is less than the period p of the microlens array, the starting point of the collection process is the lower left corner of the enlarged micrographic unit; when the period t of the micrographic array is greater than the period p of the microlens array, the starting point of the collection process is the enlarged micrographic unit The upper right corner of the graphics cell. Each collection, the collection position moves the moving distance until all the positions of the graphics are collected. The distance that the acquisition hole moves each time in the horizontal and vertical directions can be expressed as:

_Δh = (i-1)·(pt)

_Δv = (j-1)·(pt)

Among them, i and j respectively indicate that the quadrilateral collection hole has moved i times and j times from the starting point to the horizontal direction and vertical direction respectively. Therefore we can write the graphic part in the quadrilateral picker after moving it as b _ij .

Step (4), rearranging the images collected each time according to the arrangement of the microlens array. After each acquisition, the graphics b _ij left in the quadrilateral acquisition hole will be placed in a new periodic array whose period size is consistent with that of the microlens array. The coordinates of b _ij placed in the corresponding position in the new array can be written as:

b _ij ＝(p·(i-1),p·(j-1))

When the enlarged pattern unit is collected by the quadrilateral collection hole, the rearranged array is the micro pattern array designed by us. Composite the rearranged micro-pattern array and its corresponding micro-lens array, and you will see non-array dynamic graphics.

Example

In this embodiment, a dynamic anti-counterfeiting graphic of "A" is designed, and its effect is shown in FIG. 1 . Shown microlens array 101, micrograph array 102 and dynamic graphics 103 among Fig. 1 (a), and have shown that dynamic graphics changes with the change of viewing angle among Fig. 1 (b); Specifically implement as follows:

Firstly, the period and arrangement of the microlens array are designed. The microlens array is arranged in a quadrilateral, and its period size is p=50 μm. Each lens is numbered, and each lens can be expressed as a _ij , as shown in Fig. 2 .

Then design the micropattern array. Its period is t=49.5 μm, width w=20 μm, height h=25 μm, as shown in part (a) of FIG. 3 . At this point, the traditional dynamic anti-counterfeiting graphics can be obtained.

Second, take out the unit pattern of the micropattern array and enlarge it. After being enlarged by 4 times, its width W=80 μm, and its height H=100 μm, as shown in part (b) of FIG. 3 .

Again, graphics acquisition can be performed on the enlarged graphics unit. In this example, the collection aperture is a 50 diameter circle. Since the micro-pattern period t=49.5 μm is smaller than the micro-lens period p=50 μm, the starting position of collection is located at the lower left corner of the graphic unit, and the direction is right and upward, as shown in part (c) of FIG. 3 . The distance that the collection hole moves from the starting point each time in the horizontal and vertical directions can be expressed as:

_Δh = (i-1)/2

_Δv = (j-1)/2

Wherein, i=1, 2..., 160, j=1, 2..., 200. After each acquisition, only the pattern in the acquisition hole is retained, and its pattern is denoted as bij, as shown in part (d) of Figure 3.

Finally, the patterns collected each time (patterns in the collection hole) are rearranged into a new array, as shown in part (g) of FIG. 3 . The position coordinates of each pattern can be expressed as:

b _ij =(50(i-1),50(j-1))

When all i and j are executed, a complete micropattern array can be obtained.

The specific implementation manners described above are illustrative, not restrictive. Where the method of the present invention is adopted, all specific expansions are within the protection scope of the present invention without departing from the gist of the present invention and the protection scope of the claims.

Claims (2)

1. a kind of design method of the anti-fake figure of non-array Dynamically Announce based on micro-structure, it is characterised in that: including walking as follows It is rapid:

The design of step (1), micrographics array: original micrographics array period is t, and wide and high unit figure is respectively w and h；

The amplification of step (2), micrographics array element: the wide w and high h of unit figure are enlarged into W and H respectively；

Step (3), the acquisition to micrographics array element pixel: identical with microlens array unit pore size using one Hole is acquired amplified micrographics unit；It is acquired since the lower left corner or the upper right corner of amplification figure, actual starting point Depending on the period of microlens array and the period size of micrographics array；When micrographics array period t is less than microlens array When period p, the starting point of collection process is the lower left corner of the micrographics unit of amplification；When micrographics array period t is greater than lenticule When array period p, the starting point of collection process is the upper right corner of the micrographics unit of amplification；Every acquisition is primary, and the position of acquisition is moved Mobile distance is moved, until all positions of figure are all collected；It is each with vertical direction in the horizontal direction to acquire hole Mobile distance is respectively as follows:

Δ_h=(i-1) (p-t)

Δ_v=(j-1) (p-t)

Step (4), by each collected figure according to the arrangement mode rearrangement of microlens array.

2. the design method of the anti-fake figure of non-array Dynamically Announce based on micro-structure, feature exist as described in claim 1 In: by each collected figure according to the arrangement mode rearrangement specific steps of microlens array are as follows: every time after acquisition, Stay in the figure b in quadrangle acquisition hole_ijIt will be placed in a new periodic array, period size and microlens array Period it is in the same size, b therein_ijIt is placed on the coordinate of corresponding position in new array are as follows:

b_ij=(p (i-1), p (j-1)).