TWI422496B - Microstructure with diffractive grating dots and application thereof - Google Patents

Description

Microstructure with diffraction grating points and its application

The present invention relates to a microstructure having grating dots and its use, and more particularly to a microstructure having a diffraction grating point and its use.

In order to prevent unauthorized copying, manufacturing, and alteration of documents or products, anti-counterfeiting strategies have developed a variety of methods to date. The anti-counterfeiting method of producing patterns by using photographic and ink material changes relies on complicated pattern design and resolution, and can be used with an expensive printing machine to produce a desired printing pattern. Such an increase in cost cannot be effectively prevented in many cases. Unauthorized copying or alteration.

In recent years, anti-counterfeiting technology has developed rapidly, mainly based on laser light holograms, but with the disclosure of holographic technology, anti-counterfeiting functions have also been challenged. Chinese Patent No. 99814131.3 provides an invisible graphic recognition system and a manufacturing method thereof. Using digital four-dimensional variation technology, a plurality of combined invisible graphics are produced in the same system to generate a dark graphic and a digital recognizer on the printed matter. The print itself can show the dark text through the refraction and diffraction of light. When combined with different digital recognizers, another dark text can be displayed. The digital identifier disclosed in the above patents distributes a plurality of combined specific focal length micro lenses, and although it has the difficulty of passive imitation, decomposition parameters, and repeated processing, such a digital recognizer has a specific focal length combination corresponding to the printing. Therefore, the production of the digital recognizer requires high precision. When a specific digital recognizer cannot be obtained, it may cause an unrecognizable situation and lose the anti-counterfeiting purpose of the hierarchical control.

One of the objects of the present invention is to provide a microstructure having a diffraction grating point, and to design different levels of anti-counterfeiting structures by using various parameters of the grating to provide customization for different operators or users. For the required anti-counterfeiting pattern, different users and operators can also identify the patterns belonging to their levels through different auxiliary tools.

One of the objects of the present invention is to provide a microstructure having diffractive grating points, different levels of anti-counterfeiting structures and different identification methods, which can provide different manufacturers to manage their production or products, and at the same time achieve anti-counterfeiting. And the purpose of managing the product.

In view of the above problems, it is an object of the present invention to provide a method of forming a film having a microstructure capable of diffracting grating dots, which can directly form an interpretation tool on a film material, thereby increasing the speed and yield of mass production.

According to the above, a microstructure having a diffraction grating point includes a pattern region including a plurality of diffraction grating points and a plurality of anti-counterfeiting means applied to the diffraction grating points, the pattern region including a non-visible identification In the drawings, the anti-counterfeiting means includes an image anti-counterfeiting means, wherein a microlens array is used to identify a pattern image of the unrecognizable pattern under the image security means.

In an embodiment, the pattern area includes a plurality of micro-block units having the same or different dimensions, each of the micro-block units including a micro pattern formed by using the plurality of diffractive grating points, the pattern image The microlens array is recognized by the contribution of the micropatterns.

In an embodiment, the anti-counterfeiting means further comprises applying a deep anti-counterfeiting means to the micro-block units, the deep anti-counterfeiting means comprising distributing a plurality of blanking points between the diffractive grating points, through an optical microscope The deep anti-counterfeiting means that the micro-patterns or the tiny patterns cannot be recognized.

In one embodiment, the blank points are a raster-free point in the pattern area, or a point recorded in a laser direct writing manner, or a point recorded in an electron beam writing manner.

In an embodiment, the microlens array has a first period, and the image anti-counterfeiting means includes a second period and a third period applied to the micro block units, and the size of the first period is between the second period And between the third periods, such that the pattern image includes two portions of relative motion or a three-dimensional (3D) image.

In one embodiment, the anti-counterfeiting means includes dislocating a plurality of dark lines of the plurality of diffrable grating points and a plurality of other dark lines of the diffrable grating points to form a moiré pattern. The anti-counterfeiting means may also include distributing a plurality of scattering points between the diffractive grating points.

In one embodiment, a material includes the above-described microstructure having a diffraction grating point formed between a polymer layer and a reflective layer, which may further include a visually identifiable macroscopic pattern on the polymer layer. Between this reflective layer. The visually identifiable giant pattern includes an ink printed pattern or a holographic pattern.

In one embodiment, a film material includes the above-described microstructure having a diffraction grating point and the microlens array, wherein the microstructure having a diffraction grating point is formed on a polymer layer and a reflection layer Between the microlens arrays are formed on an ultraviolet photosensitive layer, the ultraviolet photosensitive layer being located on a surface of the polymer layer away from the reflective layer. The film further comprises a visually identifiable holographic pattern formed on the ultraviolet light sensitive layer, and further comprising a visually identifiable macroscopic pattern between the polymer layer and the reflective layer.

A method for forming a film material comprising a microlens array and a hologram pattern, comprising: providing a polymer layer; and transferring a pattern that cannot be visually recognized on a pattern area on a surface of the polymer layer, wherein the pattern The area includes a plurality of diffractive grating points and an image anti-counterfeiting means applied to the diffractive grating points; forming a reflective layer on a surface of the polymer layer and covering the pattern area; forming an ultraviolet photosensitive layer On the other surface of the polymer layer; transferring a microlens array pattern and a visually identifiable macroscopic pattern on the ultraviolet photosensitive layer; and hardening the ultraviolet photosensitive layer, wherein the microlens array is passed through A pattern image of the unrecognizable pattern under the image security means is identified.

In this case, a plurality of parameters of a plurality of grating diffraction points can be used to simultaneously generate a multi-layer anti-counterfeiting design. The so-called multi-layer can be different in the method of identification or interpretation, or in the case of different effects in a raster pattern. .

In the present case, a microstructure having a diffraction grating point can be combined with a giant naked view to form a material or film. The macroscopic naked view can be an ink printed pattern, or a pattern of a human eye that can be recognized by a raster dot, without a special auxiliary tool, such as a pattern, a graphic, a text, a number, and the like. The special auxiliary tools mentioned here do not include general myopia glasses, hyperopic glasses, astigmatic glasses, etc., that is, glasses worn by ordinary people due to myopia, hyperopia or astigmatism, which are still classified in the case of human eyes without special auxiliary tools. . Two-dimensional (2-dimensional, 2D) ink printing patterns are rich in color, and grating dot patterns use grating dots to diffract reference light incident on the grating points, which can be seen from different perspectives of the human eye. Visible light of different colors, such as a general dot matrix hologram pattern, the detailed technology can be referred to Taiwan Patent No. 432229, which will not be repeated here. It can be understood that when the grating dot pattern is applied to a packaging material or a label, the general consumer can directly recognize the packaging material or the label to be recognized or the authenticity of the attached product, and thus has anti-counterfeiting. Features.

Secondly, the multi-layer anti-counterfeiting of the present case described below is basically based on the actual structure, the grating point can be used to circulate visible light as the smallest unit, and the grating angle (angle) and grating pitch of the plurality of grating points are matched. , grating point size, block unit of grating dot period and dark points (including blank points where no grating points exist or the grating is filled or destroyed) and so on.

Secondly, if viewed from the displayed pattern, the pattern of the present case may be composed of one or more regions such as a printed area, a holographic effect area, a embossed pattern hidden area, a cryptographic pattern area, a scattering point area, or the like, in which printing is performed. The area and hologram effect area refers to the part that displays the macroscopic view or pattern image, and the other areas are the identifiable parts under the special auxiliary tool. When the material, the work plate, or the packaging material produced by the pattern of the present invention is applied, it may include only the visible portion of the special auxiliary tool described above, or the portion of the macroscopic viewable portion and the visible portion of the special auxiliary tool. It can be used as an intermediate product and can be processed continuously or as a final product.

Furthermore, the special auxiliary tools of the present invention include an array of micro lens, an optical microscope, a laser light interpretation tool, and the like. In terms of a layer of anti-counterfeiting effect, the microlens array can be interpreted, further viewed by an optical microscope, and can also be a identifiable or unrecognizable person.

The first layer of anti-counterfeiting in this case consists of small patterns (small patterns, tiny figures, tiny characters, tiny numbers) composed of raster points and which are recognized by the human eye with special auxiliary tools. The so-called micro pattern, that is, the human eye without special auxiliary tools can not recognize the appearance, contour or the part of the micro pattern. In this case, the human eye without special auxiliary tools cannot recognize the pattern image. Secondly, the image of the pattern contributed by the tiny patterns can be recognized by the human eye interpreted by the microlens array, which will be described below with reference to FIG. FIG. 1 is a schematic view showing the structure of a micro text, a microlens array interpretation sheet, and a minute character according to a first embodiment of the present invention. Referring to Fig. 1, the material 10 has a small text area 101, and the human eye without the special auxiliary tool cannot recognize the text to be displayed by the small text area 101. When the auxiliary tool 12 is placed on the material 10 and contacts the material 10, the human eye 5 can see and recognize the character image 121 of the minute text area 101. It should be noted that, in practical application, the auxiliary tool 12 of the embodiment directly contacts the surface of the material 10. For the convenience of description, the auxiliary tool 12 is painted on the material 10 at a certain distance, but in practical application. The auxiliary tool 12 can directly contact the surface of the material 10.

In one embodiment, the auxiliary tool 12 includes a microlens array having a period T1 and a focal length F1. The small text area 101 is filled into the small text area 101 by a plurality of text block units 1011 in a two-dimensional repeating period, wherein at least one of the dimensions has a period of T2, and each of the text block units 1011 is represented by a two-dimensional array of raster points. Aggregated, and each text block unit 1011 has a text body 10111. When the period T1 of the auxiliary tool 12 and the period of the character block unit 1011 are equal to T2, when the angle of the visual material 10 is fixed, the display of the character image 121 can be seen from above the auxiliary tool 12. When the auxiliary tool 12 is rotated on the material 10, the difference in magnification of the character image 121 can be seen, and the character image 121 has a display of the front and back and a change in the number of displays. The front and back display here means that the character image 121 seen by the observer can be the same as the text body 10111, such as "R" shown in FIG. 1, or "R" opposite to the text body 10111.

According to the above, the observer can see the character image 121 that is unrecognizable to the naked eye through the auxiliary tool 12, so that the character image 121 that can be judged to be read can be used as one of the security signs.

Next, it is to be noted that the character image 121 seen by the microlens array type auxiliary tool 12 is an image contributed by the plurality of character bodies 10111, and therefore, any text block of the small character area 101 Even if the units 1011 are not identical, the difference between the character image 121 seen through the assisting tool 12 does not necessarily occur. Therefore, different text block units 1011 can be designed, but the same text image 121 is still viewed through the auxiliary tool 12, and other auxiliary tools, such as an optical microscope, can be used to observe differently designed text block units 1011. .

For example, each text block unit 1011 in FIG. 1 includes a text body 10111 and a text background 10112, both of which may include at least one of a raster point and a blank point, and the naked eye cannot recognize the difference between the two. However, under the interpretation of the auxiliary tool, the difference in brightness or the like is sufficient to highlight the shape or outline of the text to be displayed by the text body 10111. In an embodiment, the text body 10111 is a text "R", but the text background 10112 in the upper left corner of FIG. 1 includes a number of blank points, that is, the upper left corner of the text background 10112 has fewer raster points than other text areas. The number of raster points of the text background 10112 of the block unit 1011 does not affect the character image 121 seen through the auxiliary tool 12, but it can be seen through the optical microscope that the number of raster points of the text background 10112 in the upper left corner is small. If it is applied to the security label, the observer, for example, the consumer, or the permission to see the text image 121 through the auxiliary tool 12, but other observers, such as the channel quotient, can observe through the optical microscope and have different characters. The source of raster points for background 10112 comes from different manufacturing areas. In another example, the text body 10111 may include a different number of raster points and blank points for anti-counterfeiting purposes, and is not limited to the text background 10112 having a blank point.

It should be noted that, relative to the grating point that can circulate visible light, the so-called blanking point in the present case may be that the diffraction efficiency of diffracting visible light is relatively low, and the blanking point itself may still reflect or circulate the invisible light. Or, by using incident laser light, a diffraction effect can be produced. Therefore, many methods can be used to create the so-called blank point in this case. In the above-mentioned production of the grating point, in the region where the grating point is distributed, a plurality of positions are reserved in a random number or a specific manner without making a grating, so that the blank point in the present case can be formed. Alternatively, the so-called laser direct-write or e-beam writer is used to create the so-called text in the text body 10111 or the text background 10112 or both. Leave blank, in such a way, the text image 121 that can still be seen through the auxiliary tool 12 does not necessarily produce a difference enough to be recognized, and at the same time achieves the anti-counterfeiting purpose of the second layer. Further, the blanks created by other means, such as the above-described laser direct writing or electron beam writing, can be further interpreted by other means such as incident laser light or by sorting the blank points.

Next, the total number of raster points of each of the character block units 1011 of the two small text areas 101 is different. Although the character image 121 seen through the auxiliary tool 12 is the same at this time, the optical block observation unit 1011 can understand the text block unit 1011. The total number of raster points is not the same. For example, the character block unit 1011 of a certain small text area 101 has a dimension of 7*7, that is, the text block unit 1011 includes 7 rows and 7 columns of raster points (and blank points). However, the character block unit 1011 of the other minute text area 101 has a dimension of 9*9. In this way, although the character image 121 seen by the auxiliary tool 12 is the same (including some slight brightness differences but does not affect the read text image 121), the total number of raster points of the text block unit 1011 can be known through optical microscope observation. Different, so the dimension of the text block unit 1011 can also be used as an interpretation to achieve the anti-counterfeiting effect.

According to the above, the blank point and the dimension can be used in combination, for example, the text block unit 1011 is divided into four sub-block units, and the position of the blank point in each sub-block unit is the same, but with four The order of the sub-block units in the text block unit 1011 is different, and different text block units 1011 may be formed, but the text image 121 is not affected by the interpretation by the auxiliary tool 12. In the above case, the blank point does not affect the dimension and is recognized by the optical microscope. However, the dimension of the text block unit or the sub-block unit may not be recognized by the optical microscope according to the distribution of the blank points. In addition to subdividing the text block unit 1011 into sub-block units, a plurality of text block units 1011 can also be formed into a macro block unit 102, so that more than two types of text block units 1011 can be used to form a giant block. The block unit 102 does not affect the readability of the text image 121, and can be identified according to the arrangement of the text block unit 1011 in the macro block unit 102, and another anti-counterfeiting mode is formed.

In addition to the dimensionality, several parameters of the raster point itself may be varied for further anti-counterfeiting purposes, such as but not limited to, including grating angle, grating pitch, grating fringe or raster point size. For example, a grating angle of 30 degrees is a reasonable visual discriminability, and there is a 6th degree of freedom for a single grating point. Therefore, even if the number of raster points of each character block unit 1011 of the minute text area 101 is the same, different text block units 1011 can be recognized under the optical microscope by the difference in the design of the grating angle. Also, for example, in the case of a grating point of 6um diameter grade, the number of stripes may be 3 to 8 degrees of 6 degrees of freedom. Therefore, with the grating angle and the number of stripes, each 6um-sized raster point has 36 degrees of freedom. For a text block unit 1011 with a dimension of 8*8, 8*8*36 degrees of freedom can be set. Therefore, the text image 121 seen by the human eye remains the same through the aid of the auxiliary tool 12, but it can be recognized by the different text block unit 1011 and different grating points under the optical microscope.

According to the above, further, the pattern of the present case can be combined with the design of the overlay pattern. For the details of the conventional embossed pattern design, reference may be made to Taiwan Patent No. 424163, in which the alternating stripes of the bright and dark stripes are misaligned, and the portions forming the embossed pattern may be distributed in the one or more text block units 1011 in the minute text area 101. In this way, the moiré pattern can be recognized by using the interpretation slice of the same period as the overlay pattern. In addition, the design of the case can also be combined with the design of the code pattern. The design of the traditional code pattern can refer to Taiwan Patent No. 324811, which will not be repeated here.

The above-mentioned pattern structure, that is, the pattern seen through the auxiliary tool, in the case of a fixed viewing angle and an incident angle of the incident light, the effect of the pattern is a two-dimensional fixed form, and the pattern is reduced as the auxiliary tool rotates on the material. , magnification, reversed form, and visual quantity changes. Further, in the present case, the pattern image presented by the micro pattern area is characterized by a plurality of pattern block units, and the micro lens array type auxiliary tool can be reduced, enlarged, inverted, and visually varied. Under the effect, the two patterns can be displayed for relative motion and floating effects.

Fig. 2 is a second embodiment of the present invention, illustrating a schematic diagram of a pattern overlay using two different periods. Referring to FIG. 2, the pattern block unit 1311 and the pattern block unit 1313 are superimposed to form a minute pattern area 131. The image sample body 13111 of the pattern block unit 1311 and the image sample body 13131 of the pattern block unit 1313 are all a ring diagram. It can be understood that, in addition to the micro pattern area 131 that is not recognized by the naked eye, the material 13 may also include a macroscopic bare view area 132 that is identifiable by the naked eye.

In this embodiment, the ring image will be read out by an auxiliary tool with a period of 100 um (first period). In order to subsequently read out the two floating and relatively movable circular image, at the time of design, the period of the pattern block unit 1311 is designed to be greater than 100 um, for example, 104 um (second period), and the period of the pattern block unit 1313 is designed to be smaller than 100um, for example 96um (third period), and the raster point size in the two pattern block units is the same, for example 8um. Therefore, the dimension of the pattern block unit 1311 is 13*13, and the dimension of the pattern block unit 1313 is 12*12. When the micro pattern area 131 is superimposed by the pattern block unit 1311 and the pattern block unit 1313, when the auxiliary tool 14 of the period 100um is interpreted, the two ring image images 141, 143 can be interpreted and displayed. Since the period of the pattern block unit 1311 and the period of the pattern block unit 1313 are not equal to the microlens array having a period of 100 μm, the image seen by the human eye 5 may be floated. In the second embodiment, the person The ring image 141 contributed by the plurality of pattern block units 1311 seen by the eye 5 may float, and the ring image 143 contributed by the plurality of pattern block units 1313 may sink.

Furthermore, when the auxiliary tool 14 on the material 13 is rotated in a fixed direction, in addition to the effect of reducing the magnification, the human eye 5 can still see the visual effect of the ring image 141 and the ring image 143 moving in different directions, The two patterns will have relative motion. Here, the visual effect of moving in different directions, for example, when the ring image 141 is moved in a clockwise direction in addition to the zoom-out, the ring image 143 has a visual effect of moving counterclockwise and zooming out. Therefore, the ring image 141 and the ring image 143 interpreted by the auxiliary tool 14 have a three-dimensional (3D) relative motion visual effect, which can be used as an anti-counterfeiting design.

Further, in addition to the overlay applied to the case, the design of the matching cycle can produce a visual effect of 3D and relative motion, and the splitting mode of a pattern can generate the block unit of the aforementioned blank point, and can further break up. The boundaries of the block unit make it impossible to recognize the pattern when interpreted by optical microscopy. For example, the design of a text body and its background allows the viewer to read the text through the aid tool. However, at the time of plate making, it is divided into a text block unit having a text body and a text block unit having only the same number of points, both of which adopt a definition of parallel straight stripes, and take an odd number of text block units having a text body and A combination of even-numbered strips having equal-numbered text block units, each stripe is removed by random numbers, and these positions are subsequently left blank.

Therefore, when the reading is performed by using an auxiliary tool having a microlens array, the characters can be read out, but when the optical microscope is directly observed, the text block unit, that is, the boundary of the adjacent text block unit cannot be recognized. It cannot be known by optical microscopy, and the text body of each character block unit cannot be known by optical microscopy. Therefore, the application of this design to the structure of the case can increase the difficulty of identification, increase the cost of counterfeiting and the threshold.

The pattern of the present invention can be fabricated on a material. For example, FIG. 3 is an embodiment of the present invention, illustrating a schematic cross-sectional view of a film comprising a microstructure that can be diffracted with grating dots. A material comprising a single layer or a plurality of layers of a material 153, such as, but not limited to, a polyethylene terephthalate (PET) layer and a processing layer 154 (primer) formed thereon, which The pattern of the diffraction grating dots is transferred to the processing layer 154, and a metal layer is formed as a reflective layer 155 on the processing layer 154, that is, the material 15 having the microstructure of the diffraction grating dots.

According to the above, the material 15 has a microstructure including a diffraction grating point, and the microstructure of the diffraction grating point has a plurality of anti-counterfeiting means, and the anti-counterfeiting means have the characteristics that are not recognized by the human eye without special auxiliary tools. And the hierarchy of identification.

The first level of anti-counterfeiting means, with the aid of the optical element array of the microlens, is recognized by a plurality of tiny patterns to recognize a pattern image. The pattern image displayed by the first level of anti-counterfeiting means is contributed by a plurality of micro patterns, each of which is composed of a pattern block unit, and a pattern block unit basically includes a plurality of arrays of raster points. Most of the microscopic differences between the tiny patterns do not affect the appearance of the giant images of the patterns. Therefore, the microscopic differences between the tiny patterns can be used as further anti-counterfeiting measures.

The second level of anti-counterfeiting means is implemented by using a combination of pattern block units and a difference in the dimensions of the array of raster points. One way is to arrange different macroblock units by a plurality of different pattern block units, and then use a plurality of macro block units to repeat to distribute into a pattern area, but different sorted pattern block units can represent different products, for example, It can represent different manufacturing locations, so that in addition to anti-counterfeiting, it can also be used as a product management. Alternatively, the number of dimensions included in the pattern block units produced by different manufacturing locations is not the same, for example, the dimensions of 7*7 and 9*9 are different. This second level of anti-counterfeiting means, or permission to observe through an optical microscope.

Secondly, the second level of anti-counterfeiting means includes using the pattern block block period of the image to be displayed and the period difference of the interpretation tool and the way of stacking, by means of the interpretation tool, the 3D and the pattern of the pattern to be displayed can be generated. Part of the relative motion of the visual effect.

Furthermore, the third level of anti-counterfeiting means is implemented by using a combination of parameters of each raster point. Each of the diffrable grating points includes an angle, a pitch, and a size to adjust the implementation. For example, even if the dimensions of the two pattern block units are the same, the grating angles of the corresponding positions in the array of the two grating points are different, so that the two pattern block units are different. For example, the same grating pitch, but the ratio of the width of the bright and dark stripes is not the same. For example, in combination with the design of the embossing, the dark lines are dislocated, and such anti-counterfeiting means can also be observed through an optical microscope.

The fourth level of anti-counterfeiting means belongs to deep anti-counterfeiting means, combining scattering point or code pattern and pattern image to be displayed, that is, setting or distributing points different from surrounding grating points in the array of grating points, such as laser direct writing, The point at which the electron beam is written or the space left, or the number of grating points in the array of grating points or the way the grating is diffracted in a random or specific manner. It should be noted that the above-mentioned first to third levels of anti-counterfeiting means can be combined with each other for further confirmation in use, and the fourth level of anti-counterfeiting means can cover the second level of anti-counterfeiting means in operation. The third level of anti-counterfeiting means is not easy to confirm. In the visual effect of the first level or the second level, different levels of anti-counterfeiting means do not produce sufficient visual differences for the first level or the second level of anti-counterfeiting means. In addition, the use of the fourth level of anti-counterfeiting means makes it difficult to observe the image of the pattern and other levels of anti-counterfeiting means through the optical microscope, but other identification tools, such as incident laser light, can be identified.

According to the above, the multi-level anti-counterfeiting means of the present invention can produce a common or common visual effect through a first auxiliary tool, such as a microlens array interpretation tool, but through another auxiliary tool, such as an optical microscope or an incident lightning. In the way of light, structural differences can be observed. It should be noted that the above-mentioned identification hierarchy refers to the use of the fourth layer of anti-counterfeiting means combined with other means, if the first auxiliary interpretation tool is not used, the pattern image or contour to be displayed will not be recognized. Sex. Therefore, the pattern of the present case includes a plurality of anti-counterfeiting means, through an auxiliary means for image recognition, the anti-counterfeiting means includes an image anti-counterfeiting means for displaying the image of the pattern, and a deep anti-counterfeiting means capable of covering other anti-counterfeiting means The image that can cover the pattern is recognized under other auxiliary tools.

The material 15 having the microstructure of the diffraction grating point in the present case can be used as a midstream product in the application, and continues to be mass-produced into a terminal product in the downstream, for example, ink printing on the material 15. Alternatively, a microlens array can be directly fabricated on the material 15 to become a film. 4 is a block diagram showing an embodiment of a film comprising a microstructure of a microlens array and a diffraction grating dot. Step 21, the master is made by an appropriate method, for example, using a laser to produce a digital full-image (see Taiwan Patent No. 369608 for details) or a black-and-white draft output, or with electron beam etching or laser straightening. Write the master version. In step 23, the pattern master is transferred to the aforementioned single layer or multi-layer material including the polymer in an appropriate manner, for example, a UV process, and then formed into a reflective layer in a suitable manner, for example, by evaporation. On the molecular layer to form a material having a microstructure that can be diffracted by the grating points. In step 25, an ultraviolet (UV) photosensitive layer is formed on the material on the other surface of the reflective layer (i.e., on the surface of the material that is relatively far from the reflective layer). Step 27, shifting the pattern including the microlens array on the ultraviolet light photosensitive layer, and the pattern transferred in this step may be a single or composite pattern including a microlens array, so-called composite pattern, or a giant The visible point matrix hologram pattern is transferred together with the microlens array. In step 29, the ultraviolet light sensitive layer is treated in a suitable manner, such as development hardening, so that the interpretation tool of the microlens array can be directly formed on a film on the material.

The above-mentioned film material including the microlens array can be cut into an appropriate size as a label, and then attached to other giant visible pattern printing materials or articles as an anti-counterfeit label for the user, for example, the most terminal consumer. The authenticity of the item is identified. In this case, the user directly recognizes the displayed pattern through an auxiliary tool of the microlens array to distinguish the authenticity. Manufacturers at all stages of the intermediate manufacturing process can be identified by further interpretation. For the further processing of the film material, the anti-counterfeiting pattern, the coding, etc. can be added to the subsequent processing steps, which becomes a means for anti-counterfeiting on the film material, so that the manufacturer of the film material post-processing is Product management and anti-counterfeiting.

While the invention has been discussed in terms of some embodiments, it should be understood that the invention is not limited. The embodiments herein are to be construed as illustrative, and many modifications, variations, and other embodiments are possible within the scope of the invention, which may be added, removed, and/or recombined. In addition, processing steps can be added, removed, or reordered. Many different designs and methods are also available.

5. . . Human eye

10,13,15. . . material

101. . . Tiny text area

1011. . . Text block unit

10111. . . Text ontology

10112. . . Text background

102. . . Giant block unit

12,14. . . Auxiliary tool

121. . . Text image

131. . . Tiny pattern area

1311, 1313. . . Pattern block unit

13111, 13131. . . Graph sample body

132. . . Giant view sample area

141,143. . . Ring image

153. . . Single or multi-layer materials including polymers

154. . . Processing layer

155. . . Reflective layer

21,23,25,27,29. . . step

T1, T2. . . cycle

F1. . . focal length

FIG. 1 is a schematic view showing the structure of a micro text, a microlens array interpretation sheet, and a minute character according to a first embodiment of the present invention.

Fig. 2 is a second embodiment of the present invention, illustrating a schematic diagram of a pattern overlay using two different periods.

Figure 3 is a cross-sectional view showing a film of a microstructure including a diffraction grating dot, in accordance with an embodiment of the present invention.

4 is a block diagram showing an embodiment of a film comprising a microstructure of a microlens array and a diffraction grating dot.

5. . . Human eye

13. . . material

14. . . Auxiliary tool

131. . . Tiny pattern area

1311, 1313. . . Pattern block unit

13111, 13131. . . Graph sample body

132. . . Giant view sample area

141,143. . . Ring image

Claims (19)

A microstructure having a diffraction grating point includes: a pattern region including a plurality of diffraction grating points and a plurality of anti-counterfeiting means applied to the diffraction grating points, wherein the pattern region includes a pattern that cannot be visually recognized. The anti-counterfeiting means includes an image anti-counterfeiting means, wherein a microlens array is used to identify a pattern image of the unrecognizable pattern under the image anti-counterfeiting means. The micro-structure having a diffrable grating point as described in claim 1, wherein the pattern area comprises a plurality of micro-block units, each of the micro-block units comprising forming a portion of the diffractive grating points A tiny pattern that is recognized by the micropatterns by the micropatterns. A microstructure having diffractive grating dots as described in claim 2, wherein the microcell units have the same or different dimensions. The micro-structure having a diffractive grating point as described in claim 2, wherein the anti-counterfeiting means further comprises a deep anti-counterfeiting means applied to the micro-block units, the deep anti-counterfeiting means comprising distributing a plurality of blanking points The deep anti-counterfeiting means prevents the micro-block units from being recognized between the diffractive grating points through an optical microscope. The micro-structure having a diffractive grating point as described in claim 2, wherein the anti-counterfeiting means further comprises a deep anti-counterfeiting means applied to the micro-block units, the deep anti-counterfeiting means comprising distributing a plurality of blanking points The deep anti-counterfeiting means makes the tiny patterns unrecognizable between the diffractive grating points through an optical microscope. A microstructure having a diffraction grating point as described in claim 4 or 5, wherein the blank points are a grating-free point in the pattern area, or are recorded by laser direct writing. Point, or a point recorded by electron beam writing. The micro-structure having a diffractive grating point as described in claim 2, wherein the microlens array has a first period, and the image anti-counterfeiting means includes a second period and a third period applied to the micro-cells a block unit, the size of the first period being between the second period and the third period. A microstructure having a diffractive grating point as described in claim 7 wherein the pattern image comprises two portions of relative motion. A microstructure having a diffraction grating point as described in claim 7 wherein the pattern image comprises a three-dimensional (3D) image. The micro-structure having a diffractive grating point as described in claim 1, wherein the anti-counterfeiting means comprises a plurality of grating angles, a plurality of grating spacings, and a plurality of grating point sizes of the diffrable grating points Same or different. The micro-structure having a diffractive grating point as described in claim 1, wherein the anti-counterfeiting means comprises a plurality of anti-counterfeiting means for diffractive grating points and a plurality of other diffractive grating points The dark lines are misaligned to form a pattern of overlays. A microstructure having a diffractive grating point as described in claim 1 wherein the anti-counterfeiting means comprises distributing a plurality of scattering points between the diffractive grating points. A material comprising a microstructure having a diffraction grating point as described in claim 1 is formed between a polymer layer and a reflective layer. The material described in claim 13 further includes a visually identifiable macroscopic pattern between the polymer layer and the reflective layer. The material of claim 14, wherein the visually identifiable macroscopic pattern comprises an ink printed pattern or a holographic pattern. A film material comprising the microstructure of the diffraction grating point described in claim 1 and the microlens array, wherein the microstructure having the diffraction grating point is formed on a polymer layer and a Between the reflective layers, the microlens array is formed on an ultraviolet photosensitive layer, and the ultraviolet photosensitive layer is located on a surface of the polymer layer away from the reflective layer. The film material of claim 16 further comprising a visually identifiable macroscopic pattern between the polymer layer and the reflective layer. The film material of claim 16 further comprising a visually identifiable hologram pattern formed on the ultraviolet light sensitive layer. A method for forming a film material comprising a microlens array and a hologram pattern, comprising: providing a polymer layer; and transferring a pattern that cannot be visually recognized on a pattern area on a surface of the polymer layer, wherein the pattern The area includes a plurality of diffractive grating points and an image anti-counterfeiting means applied to the diffractive grating points; forming a reflective layer on a surface of the polymer layer and covering the pattern area; forming an ultraviolet photosensitive layer On the other surface of the polymer layer; transferring a microlens array pattern and a visually identifiable macroscopic pattern on the ultraviolet photosensitive layer; and hardening the ultraviolet photosensitive layer, wherein the microlens array is passed through A pattern image of the unrecognizable pattern under the image security means is identified.