JP2009023184A - Image forming body and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming body applied to valuables needing forgery prevention, truth/falsehood distinction, and duplication prevention, and to provide a method for manufacturing the image forming body. <P>SOLUTION: In the image forming body, an image is formed on a light transmitting substrate. The image is formed on one surface of the substrate by a recessed line pattern having a relief pattern arranged regularly. The height of the relief pattern is changed in n steps (n is an integer ≥3) every density corresponding to an original image and formed. On the other surface of the substrate, the recessed line pattern arranged regularly in accordance with a domain wherein the image is formed is formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image forming body that is applied to valuables that require anti-counterfeiting, authenticity discrimination, and copy prevention such as banknotes, securities, passports, passports, gift certificates, cards, product tags or brand protection, and the like. It relates to a manufacturing method thereof.

  Banknotes, securities, passports, passports, gift certificates, cards, product tags, brand protection, etc. are required to be difficult to counterfeit and tamper by nature. As such a forgery prevention measure, a printed pattern is applied to a valuable item by a collection of fine lines, and for example, a relief pattern can be mentioned. The relief pattern is a pattern in which a three-dimensional image as a motif is expressed by a collection of a plurality of fine lines on a two-dimensional plane.

  Furthermore, there is known a technique for performing authenticity determination so that a latent image can be recognized by observing valuables under predetermined conditions. For example, technology that uses concave and convex substrates and printed image lines, technology that uses printed image lines on the front and back of the substrate, technology that allows you to check latent images by overlaying discriminators on valuables, light-reflective layers, and light Examples include a technique of forming a concave shape or a through hole having a specific depth on a base material on which a permeable layer is laminated.

  Examples of the technique for causing the latent image to appear using the above-described uneven substrate and printed image line include, for example, a material having various uneven shapes of various line patterns or relief patterns and both patterns, Specified only when observing the printed material at an angle by combining one of various line-drawing lines or halftone-dotting lines with a constant spacing of colors and other colors other than colorless and transparent and both of them. A latent image pattern forming body and a method for producing the same are disclosed (for example, see Patent Document 1).

  As a technique using the printed image lines on the front and back of the base material, for example, a line pattern is printed on either the front or back side of the printing material that transmits light, and on the other side, A latent image applied to a pattern to be printed on the other printed pattern having a synchronized line arrangement and a pattern having the same line width in the vertical direction to the line arrangement of the one line pattern The image information to be given is shifted according to the density of the image information as a latent image with respect to the non-image portion between the image lines in the vertical direction of one line pattern line array and the image lines, and The range of the non-image portion between the image lines in the vertical direction of the line array of the one line pattern from the minimum density to the maximum density of the image information having continuous tone that is desired to be a latent image. Of the pattern printed on the other side, and no image information as a latent image has been applied. This is characterized by the fact that the printed lines of one line and the line of one line pattern are printed on the front and back so that the print position is the target. Has been disclosed as a continuous-tone visible image (see, for example, Patent Document 2).

  Furthermore, a basic image composed of fine line drawings is provided on the surface of the light-transmitting substrate, and the basic image includes a background image portion and a message image portion on which at least one latent image is applied. The background image portion and the message image portion are composed of fine line drawings that cannot be distinguished with the naked eye, the angle of the line drawing arrangement direction of the background image portion and the message image portion is different, and A printed matter having an image similar to the basic image on the back surface of the light-transmitting base material and printed so that the basic image and the similar image on the back surface coincide and overlap in the same region. Is disclosed (for example, see Patent Document 3).

  As a technique for confirming a latent image by superimposing a discriminating tool on a valuable item, for example, a background portion and a plurality of discriminating pattern portions having a regular line-shaped pattern are included. By placing a discriminator having a line-shaped pattern with a pitch that interferes with the line-shaped pattern of the printed matter on a printed matter characterized by different angles of the line-shaped pattern, and rotating the discriminating tool, A printed material, a discriminating tool, an image forming method, and a copied material discriminating method characterized in that a plurality of images appear (see, for example, Patent Document 4).

  As a technique for forming a concave or through hole having a specific depth on a base material on which a light reflective layer and a light transparent layer are laminated, for example, a base on which a light reflective layer and a light transparent layer are laminated is used. A basic image is formed on the material by pixels arranged on the surface of the light transmissive layer at specific intervals, the basic image is divided into a first region and a second region, and the pixels have a specific depth. A concave portion or a through-hole having a thickness, and an edge portion of the pixel is formed with a raised portion protruding from the surface of the light-transmitting layer, and the pixel forming the first region and the second region are formed. As the pixels to be formed, an image forming body having a different shape, size, or pixel angle is disclosed (for example, see Patent Document 5).

Japanese Patent No. 2615401 (page 1-4, FIG. 1-7) Japanese Examined Patent Publication No. 8-13568 (page 1-4, FIG. 1-11) JP 2002-154262 (page 1-4, FIGS. 1 and 2) JP-A-10-297077 (page 1-3, FIG. 1-11) JP 2006-224416 A (page 1-8, FIG. 1-12)

  In Cited Documents 1 to 4, in general, it is essential to use a print image line in order to make a latent image appear. However, in recent years, forgery of valuables with commercial copiers and printers has frequently occurred, and the risk of easy counterfeiting is increasing as the performance of home appliances improves. Therefore, there is a demand for a technique for forming a latent image without using a print line.

  Further, in the cited references 1 to 4, the latent image is visually recognized by the appearance and hiding of the image line depending on the observation angle or the angle at which the discriminating tool is overlapped. Did not change.

  In Cited Documents 1 to 3, in order to make the latent image appear, the angle at which the substrate is tilted is limited, and it is difficult to visually recognize the latent image when the tilt angle is shallow. For example, in order to produce an image in which the latent image can be visually recognized at a shallow angle, the unevenness of the image line forming the latent image and the image line forming the surrounding background image must be increased. It was difficult to produce.

  In the cited document 4 and the cited document 5, the latent image to be visually recognized does not have continuous gradation, and there is a problem that it is difficult to adopt a complicated design as the latent image. Furthermore, the cited document 4 has a problem that a discriminator is indispensable for causing the latent image to appear, and the discriminator must be carried. In Cited Document 5, in order to make a latent image appear, a printed image line is not used and a concave shape or a through hole is formed. However, a substrate on which a light reflecting layer and a light transmitting layer are laminated is necessary. Therefore, there was a problem that the cost of the base material was high.

  The present invention is intended to solve such a conventional problem, and the latent image is not visually recognized due to the appearance and hiding of the image line formed by the print image line, and the discriminator is overlapped. Without using a substrate on which a light reflective layer and a light transmissive layer are laminated, a latent image can be confirmed without tilting the substrate at a deep angle. Depending on the angle at which the substrate is tilted, the latent image An object of the present invention is to propose an image forming body in which a complex design having continuous tone can be adopted for a latent image that changes in brightness (negative image / positive image), and a method for manufacturing the image forming body.

  In the present invention, an image is formed on a light transmissive substrate, and the image is formed by a concave line having a relief pattern regularly arranged on one surface of the light transmissive substrate. The height of is changed in n steps (n is an integer of 3 or more) for each density corresponding to the original image, and corresponds to a region where the image is formed on the other surface of the light-transmitting substrate. Thus, the image forming body is characterized by forming regularly arranged concave lines.

  Further, according to the present invention, the concave lines having the regularly arranged relief patterns are arranged in such a manner that the concave lines having the first predetermined width are arranged in the first predetermined interval and in the first predetermined direction. A concave line having a second predetermined width is formed on the other surface of the light-transmitting substrate, and the concave line is regularly arranged corresponding to the area where the image is formed. Two predetermined intervals and in a second predetermined direction, wherein the first predetermined interval and the second predetermined interval are the same, and the first predetermined direction and the second predetermined direction are the same. An image forming body.

  Further, the present invention is the image forming body characterized in that the maximum value of the height h that changes in n stages is: first predetermined interval-first predetermined width> height h.

  Further, according to the present invention, the minimum value of the height h that changes in n steps is the position of a reference line for forming a concave line having a regularly arranged relief pattern. It is a formed body.

  Further, according to the present invention, a relief line is formed by connecting a concave line that changes in n steps (n is an integer of 3 or more) at a height h and a concave line that does not change from a reference line with a connecting line, and the angle of the connecting line Is an image forming body characterized by being in the range of 0 to 90 ° with respect to the reference line.

  The present invention is the image forming body, wherein the second predetermined width is equal to or less than the first predetermined interval minus the first predetermined width.

  According to another aspect of the present invention, there is provided an image forming body characterized in that the relationship between the first predetermined width and the second predetermined width is the same or substantially the same.

  According to the present invention, the first predetermined width and the second predetermined width are 30 to 500 μm, and the first predetermined interval and the second predetermined interval are in the range of 70 to 2000 μm. Is the body.

  Further, the present invention defines a step of acquiring gradation image data that is an aggregate of pixels in which density values associated with an original image are defined, a direction and interval of a reference line, a direction and interval of a relief interval, A step of generating each reference coordinate Q (0, 0), Q (1, 0),... Q (m, n) obtained from the intersection of the reference line and the relief, and each reference coordinate Q is represented by gradation image data. The reference coordinates Q (0, 0), Q (1, 0),..., Q (m, n) are relief coordinates corresponding to the density of the gray scale image data. q (0,0), q (1,0),... q (m, n) to generate relief gradation image data, and line data in the same direction and interval as the reference line And a gradation image composed of concave lines based on relief gradation image data on one surface of the light-transmitting substrate. And forming an image forming body formed by forming a line consisting of concave lines on the other surface of the light-transmitting substrate corresponding to the area of the gradation image based on the line data. Is the method.

  Further, the present invention defines a step of acquiring gradation image data that is an aggregate of pixels in which density values associated with an original image are defined, a direction and interval of a reference line, a direction and interval of a relief interval, A step of generating each reference coordinate Q (0, 0), Q (1, 0),... Q (m, n) obtained from the intersection of the reference line and the relief, and each reference coordinate Q is represented by gradation image data. The reference coordinates Q (0, 0), Q (1, 0),..., Q (m, n) are relief coordinates corresponding to the density of the gray scale image data. converting to q (0,0), q (1,0),... q (m, n), combining relief coordinates q by connecting lines, and generating relief gradation image data; A process of generating line data in the same direction and interval as the reference line, and a relief floor on one side of the light-transmitting substrate A gradation image composed of concave lines based on the image data is formed, and the other surface of the light-transmitting substrate is composed of concave lines based on the line data corresponding to the area of the gradation image. It is a manufacturing method of the image forming body formed by the process of forming a line.

  In the image forming body of the present invention, the appearing latent image is excellent in gradation expression and can be expressed as a fine image. Since a complicated design having continuous gradation can be adopted, the design is not limited.

  The image forming body of the present invention forms an image by forming a concave line on a light-transmitting base material with a special machine such as a laser processing machine, so the cost of the base material itself is low and an anti-counterfeit effect Excellent. In addition, the appearance of the latent image does not include the discriminating tool, the appearance and hiding of the image line itself forming the latent image, and the use of light refraction, so that the substrate does not tilt at a deep angle. In both cases, since the latent image can be confirmed, the person to be confirmed can easily determine authenticity. Further, the image forming body of the present invention, when observed by gradually tilting from the vertical direction to the horizontal direction, the brightness of the latent image changes continuously (that is, the latent image changes from a positive image to a negative image, Therefore, it is possible to determine whether the latent image is present and whether the negative / positive is changed. Accordingly, it is possible for anyone to make a true / false determination based on whether or not the above-mentioned effect can be obtained on the spot without using a determination tool, a special authenticity determination device, or the like.

  Since the concave line forming the image forming body of the present invention can be produced with a laser, different information (variable information) can be individually formed on the valuables.

  From the above, the image forming body of the present invention has a high authenticity discrimination effect and has an anti-duplication effect because it is formed in a fine shape, such as banknotes, securities, passage tickets, passports, gift certificates, cards, It can be applied to product tags or brand protection.

  The best mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and various other embodiments are included within the scope of the technical idea described in the scope of claims. Note that the reference line described in the present specification is not formed in an actual image forming body, but is a term used to describe the present invention or an element necessary for the method of manufacturing the image forming body of the present invention. It is.

(Image forming body)
A concave line having a predetermined width W according to the present invention will be described with reference to FIG. As shown in FIG. 1, the concave line 5 having a predetermined width W is formed lower than the height of the base on the surface of the light transmissive substrate 1. The predetermined width W is a width formed on the surface of the light transmissive substrate 1 and is not a width in the depth direction. The cross-sectional shape of the concave line 5 having a predetermined width W is triangular as shown in FIG. 1 (a), trapezoidal as shown in FIG. 1 (b), rectangular as shown in FIG. 1 (c), Examples include a bowl shape as shown in FIG. 1D and a right triangle shape as shown in FIG. However, the cross-sectional shape of the concave line 5 that is the configuration of the present invention is not limited to FIG. 1A to FIG. 1E, and for example, FIG. 1A to FIG. Alternatively, it can be formed in other cross-sectional shapes.

  The image 2 formed on one surface 1a (for example, the surface) of the image forming body A1 in the present invention will be described. As shown in FIG. 2A, an image 2 is formed on one surface 1a of the light-transmitting substrate 1 by a line 6a having a relief pattern 4 from the reference line 3a. The relief pattern is a pattern in which a three-dimensional image (hereinafter referred to as “original image”) serving as a motif is expressed by an aggregate of a plurality of fine lines on a two-dimensional plane. As shown in FIG. 2B, which is a partially enlarged sectional view of FIG. 2A, the line 6a having the relief pattern 4 has a first predetermined width W1 that does not penetrate the light-transmitting substrate 1. Are arranged in the first predetermined interval P1 and in the first predetermined direction X1.

  As shown in FIG. 3, the height h of the relief of the line 6a having the relief pattern 4 is formed in n stages (n is an integer of 3 or more), and corresponds to, for example, an original image having a density of 0 to 255. The height h is determined for each concentration. The maximum value of the height h that changes in n stages needs to be the first predetermined interval P1−the first predetermined width W1> height h, and the minimum value of the height h that changes in n stages is 0. is there. The minimum value 0 is the position of a reference line for forming a concave line having a regularly arranged relief pattern. Therefore, the range of the height h that changes in n stages needs to be in the relationship of the first predetermined interval P1−the first predetermined width W1> the height h ≧ 0 (formula). If it is not formed within this range, the sharpness of the gradation image described later will be lowered.

  Also, as shown in FIG. 4, a concave line 5a1 whose relief is height h and changes in n steps (n is an integer of 3 or more) and a concave line 5a2 which does not change from the reference line 3a are connected by a connecting line 5a3. The angle of the coupling line 5a3 is preferably in the range of 0 to 90 ° with respect to the reference line 3a. However, in consideration of production on a computer, in practice, it is approximately 0 to 80 °. Moreover, it may not be connected with a bond line depending on the case.

  In addition, the maximum density region of the gradation image that can be confirmed when the image forming body described later is observed by tilting is the maximum value of the relief height h that changes in n steps, and the minimum density region changes in n steps. The maximum density region of the gradation image that can be confirmed when the image forming body is tilted and observed by tilting the image forming body is the minimum value of the relief height h that changes in n stages, The lowest density region is the maximum value of the relief height h that changes in n stages. That is, when the image forming body is tilted and observed by providing a deviation which is the height h of the relief according to the density of the image 2 and forming a concave parallel line on the other surface of the light-transmitting substrate to be described later. The gradation image can be confirmed clearly.

  A line 6b composed of a concave line 5b formed on the other surface 1b (for example, the back surface) of the image forming body A1 of the present invention will be described. Each line of the line 6b is formed by the reference line 3b to the line 5b on the other surface 1b of the light-transmitting substrate 1, as shown in FIG. The region where the line 6b composed of the concave line 5b is formed corresponds to the back surface of the region where the image 2 of the one surface 1a shown in FIG. 2 is formed. As shown in FIG. 5B, which is a partially enlarged sectional view of FIG. 5A, the concave line 5b has a concave shape having a second predetermined width W2 that does not penetrate the light-transmitting substrate 1. The lines 5b are arranged in the second predetermined interval P2 and in the second predetermined direction X2.

  At this time, the first predetermined interval P1 formed on one surface 1a of the light transmissive substrate 1 and the second predetermined interval P2 formed on the other surface 1b of the light transmissive substrate 1 are the same interval. Further, the first predetermined direction X1 formed on one surface 1a of the light transmissive substrate 1 and the second predetermined direction X2 formed on the other surface 1b of the light transmissive substrate 1 are the same direction. Need to be. That is, the reference line 3a necessary for forming the image 2 of the one surface 1a of the light transmissive substrate 1 and the concave line 5b formed on the other surface 1b of the light transmissive substrate 1 The reference line 3b necessary for forming a line needs to be in the same direction. Further, the second predetermined width of the concave line 5 b formed on the other surface 1 b of the light transmissive substrate 1 is equal to the second predetermined width of the concave line 5 a formed on the one surface 1 a of the light transmissive substrate 1. It is necessary to form them at a predetermined interval of 1−the first predetermined width or less. If it is not formed within this range, the sharpness of the gradation image described later will be lowered.

  In the above description, the concave line 5a is formed at an angle of 0 ° with respect to the reference line 3a. However, the present invention is not limited to this, and the concave line 5a has a predetermined angle with respect to the reference line 3a. The line 5a can be formed. Further, although the concave line 5b is formed at an angle of 0 ° with respect to the reference line 3b, the present invention is not limited to this, and the concave line 5b has a predetermined angle with respect to the reference line 3b. 5b can be formed.

  A first predetermined width W1 of the concave line 5a formed on one surface 1a of the light transmissive substrate 1 and a second of the concave line 5b formed on the other surface 1b of the light transmissive substrate 1 It is preferable that the relationship of the predetermined width W2 is the same or substantially the same.

  The first predetermined width W1 of the concave line 5a formed on one surface 1a of the light transmissive substrate 1 and the second of the concave line 5b formed on the other surface 1b of the light transmissive substrate 1 The predetermined width W2 is 30 to 500 μm, and is formed on the first predetermined interval P1 of the concave line 5a formed on one surface 1a of the light transmissive substrate 1 and on the other surface 1b of the light transmissive substrate 1. It is preferable that the 2nd predetermined space | interval P2 of the concave line 5b to be in the range of 70-2000 micrometers. If it is smaller than this range, it will be difficult to produce. If it is larger than this range, a large area will be required to form a fine gradation image.

  The image forming body A1 of the present invention will be described. The image forming body A1 forms the image 2 on one surface 1a shown in FIG. 2A of the light transmissive substrate 1, and the other surface 1b of the light transmissive substrate 1 shown in FIG. The shown line 6b is formed. FIG. 6A shows the image forming body A1. FIG. 6B shows a partially enlarged sectional view of FIG. The positional relationship between the concave line 5a formed on one surface 1a of the light transmissive substrate 1 and the concave line 5b formed on the other surface 1b of the light transmissive substrate 1 is the same or different. It may have and is not specifically limited. Depending on the degree of deviation, the order of negative / positive in which a gradation image, which will be described later, is viewed may be switched.

  FIG. 7 is a diagram when the image forming body A1 shown in FIG. 6A is observed with the naked eye from a direction slightly inclined from the vertical. The observation state at this time is transmitted light, and the gradation image 2 'can be confirmed. The positional relationship between the light source, the image forming body A1, and the observer is almost as shown in FIG. At this time, as shown in FIG. 8B, when the light passes through the concave line 5a or 5b, the scattered light Ib is generated by the unevenness of the surface of the line. Therefore, the amount of light reaching the observer is reduced, and the concave lines 5a and 5b are observed darkly with the naked eye. Further, the light becomes the refracted light Ic when passing through the concave line 5a or 5b, but at least a part of the refracted light Ic travels in a direction different from the observer. Therefore, the portions of the concave lines 5a and 5b are observed darker with the naked eye.

  FIG. 9 is a view when the image forming body A1 shown in FIG. 6A is observed by being tilted gradually from the vertical direction to the horizontal direction with the naked eye under visible transmitted light. However, the direction in which the image forming body A1 is inclined is the X1 direction or the X2 direction.

  It is assumed that when the image forming body A1 is observed from the vertical direction, the positional relationship between the concave lines 5a and 5b is as shown in FIG. In this case, as shown in FIG. 9B, the entire surface of the image forming body A1 is observed with substantially uniform brightness. Since the concave lines 5a and 5b are respectively formed on the front and back of the light-transmitting substrate 1, when the image forming body A1 is gradually tilted in the X1 or X2 direction, the positional relationship between the concave lines 5a and 5b Respectively change as shown in FIG. 10 (a) or FIG. 10 (c). As a result, there is a difference in the area of the darkly observed region, and this difference in area is perceived by the naked eye as a gradation difference. Therefore, a gradation image 2 ′ as shown in FIG. 9A or FIG. Observed. As shown in FIGS. 10 (a) and 10 (c), this darkly observed region depends on the height of the relief of the concave line 5a and also on the way in which the concave lines 5a and 5b overlap. To do. At this time, since the size of the area of the darkly observed portion is reversed due to the overlapping of the concave lines 5a and 5b, the gradation image 2 ′ is as shown in FIG. 10 as the image forming body A1 is deeply inclined. Negative image and positive image are observed alternately.

  The image forming body of the present invention is formed by providing one image in the above description, but a plurality of images can be formed. However, considering the visibility of the gradation image, the number of images is preferably four or less. For example, when two images are formed as shown in FIG. 11, the first reference line 3a1 is set in the X direction as shown in FIG. 11 (a), and the second reference as shown in FIG. 11 (b). The reference line 3a2 is provided in the Y direction, and the angle formed by the X direction and the Y direction is 90 ° as shown in FIG. A first image 2a is formed with reference to the first reference line 3a1 as shown in FIG. 11A, and a second image 2b with reference to the second reference line 3a2 as shown in FIG. 11B. And the first image 2a shown in FIG. 11 (a) and the second image 2b shown in FIG. 11 (b) can be combined to form the image 2 shown in FIG. 11 (c). In this case, the image 2 composed of the first image 2a and the second image 2b is formed on one surface of the light transmissive substrate 1, and the first surface is formed on the other surface of the light transmissive substrate 1. It is necessary to form a line consisting of concave lines in the same interval and in the same direction as the reference line 3a1 and the second reference line 3a2. Note that the arrangement direction of the concave lines forming the first image 2a may be different from the arrangement direction of the concave lines forming the second image 2b.

  Further, when four images are formed, the first reference line is provided in the X direction, the second reference line is provided in the Y direction, the third reference line is provided in the XY1 direction, and the fourth reference line is provided. Provided in the XY2 direction, the angle between the X direction and the Y direction is 90 °, the angle between the XY1 direction and the XY2 direction is 90 °, the angle between the X direction and the XY1 direction is 45 °, and the Y direction and the XY2 direction The angle formed is 45 °. A first image is formed with reference to the first reference line, a second image is formed with reference to the second reference line, a third image is formed with reference to the third reference line, and the fourth A fourth image is formed with reference to the reference line. In this case, an image composed of the first image, the second image, the third image, and the fourth image 2b is formed on one surface of the light transmissive substrate 1, and the other of the light transmissive substrate 1 is formed. It is necessary to form a line consisting of concave lines in the same interval and in the same direction as the first reference line, the second reference line, the third reference line, and the fourth reference line.

  The concave line 5a formed on one surface 1a of the light transmissive substrate 1 and the concave line 5b formed on the other surface 1b of the light transmissive substrate 1 may be formed by a laser processing machine. Is possible. The type of laser is not particularly limited, but a carbon dioxide laser is preferable. Although it does not become a problem in particular, the raised part which protruded rather than the surface of the transparent base material may be formed in the edge part of a concave line with the heat of a laser. The depth of the concave line 5a formed on one surface 1a of the light-transmitting substrate 1 and the depth of the concave line 5b formed on the other surface 1b of the light-transmitting substrate 1 is the same as that of the light-reflecting substrate. Although it varies depending on the thickness, it is preferably about 50 μm to 300 μm.

  The light-transmitting substrate is preferably a transparent substrate, but may be any substrate that can transmit light, and a translucent substrate having color can also be used. For example, PET, polyethylene, polypropylene, polyester, nylon polyurethane, polyvinyl chloride, polyvinyl acetate, and polyacryl are used as the material. The thickness of the light-reflecting substrate is not particularly limited, and it is effective for a thin substrate of about 60 μm to a card substrate of about 760 μm.

  The design of the gradation image of the present invention is not particularly limited, such as letters, numbers, symbols, designs, pictures, images having gradation, and face images.

(Image forming body manufacturing apparatus)
An image forming body manufacturing apparatus will be described below. As shown in FIG. 12, the image forming body manufacturing apparatus 11 includes an image acquisition unit 12, a reference coordinate generation unit 13, a relief coordinate conversion unit 14, a relief gradation image data generation unit 15, a line data generation unit 16, and a laser processing. Consists of means 17. The image acquisition unit 12, the reference coordinate generation unit 13, the relief coordinate conversion unit 14, the relief gradation image data generation unit 15 and the line data generation unit 16 are performed by a computer, a workstation, or the like. When the relief coordinates obtained by the relief coordinate conversion means 14 are used as relief gradation image data as they are, the relief gradation image data generation means 15 is not necessary.

  The image acquisition unit 12 acquires gradation image data 7 which is an original image of the gradation image of the image forming body, for example, an aggregate of pixels in which any of density values 0 to 255 is defined. If it is not gradation image data that is an aggregate of pixels in which any of density values 0 to 255 is defined, the acquired image is subjected to image processing, and an aggregate of pixels in which any of density values 0 to 255 is defined Is converted into gradation image data. An image is acquired by an image scanner, a digital camera, a handy type reader, a camera-equipped mobile phone, or the like.

  The reference coordinate generation means 13 defines the direction and interval of the reference line, the direction and interval of the relief interval, and each reference coordinate Q (0,0), Q (1,0) obtained from the intersection of the reference line and the relief. ... Q (m, n) is generated.

  The relief coordinate conversion unit 14 associates each reference coordinate Q with the pixel density at the pixel position of the gradation image data, and sets the reference coordinates Q (0,0), Q (1) at the position related to the density value of the gradation image data. , 0),..., Q (m, n) are converted into relief coordinates q (0, 0), q (1, 0),... Q (m, n). At this time, if the interval between the coordinates is small, the relief coordinates are used as they are as relief gradation image data.

  The relief gradation image data generation means 15 generates relief gradation image data 8 by combining the relief coordinates q with a connecting line. When the relief coordinates obtained by the relief coordinate conversion means 14 are used as relief gradation image data as they are, the relief gradation image data generation means 15 is not necessary.

  The line data generating means 16 generates line data in the same direction and interval as the reference line 3.

  The laser processing means forms, on one surface of the light transmissive substrate, a gradation image composed of concave lines based on the relief gradation image data generated in the fourth step, and the other side of the light transmissive substrate. A line consisting of concave lines is formed on this surface based on the line data.

(Method for producing image forming body)
A method for producing the image forming body will be described below. As shown in FIG. 13, in the first step, the gradation image data 7 which is an original image of the gradation image of the image forming body, for example, an aggregate of pixels in which any one of density values 0 to 255 is defined. Is acquired by the image acquisition means. If it is not the gradation image data 7 that is an aggregate of pixels in which any of density values 0 to 255 is defined, the acquired image is subjected to image processing, and a set of pixels in which any of density values 0 to 255 is defined. It is converted into gradation image data that is a body. An image is acquired by an image scanner, a digital camera, a handy type reader, a camera-equipped mobile phone, or the like. FIG. 14A shows gradation image data 7 serving as an original image.

  The second step defines the direction and interval of the reference line, the direction and interval of the relief interval, and each reference coordinate Q (0,0), Q (1,0), obtained from the intersection of the reference line and the relief, ... Q (m, n) is generated by the reference coordinate generation means. FIG. 14B shows the direction and interval of the reference line 3. FIG. 14C shows the direction and interval of the relief 4 interval. FIG. 15A shows each reference coordinate Q obtained from the intersection of the reference line 3 and the relief 4.

  In the third step, each reference coordinate Q generated in the second step is associated with the pixel density of the pixel position of the gradation image data acquired in the first step, and the position related to the density value of the gradation image data. To the reference coordinates Q (0,0), Q (1,0),... Q (m, n) as relief coordinates q (0,0), q (1,0),. n) is converted by the relief coordinate conversion means. FIG. 14B shows the relief coordinates q converted from the respective reference coordinates Q. At this time, if the interval between the coordinates is small, the relief coordinates are used as they are as relief gradation image data.

  In the fourth step, the relief coordinates q acquired in the third step are combined by a connecting line, and the relief gradation image data 8 is generated by the relief gradation image data generation means. FIG. 16A shows a line 6a having a relief pattern in which the reference coordinates Q and the relief coordinates q are joined in the reference line direction by a connecting line 5a3. Further, FIG. 16B shows relief gradation image data 8 formed by a line 6a having a relief pattern. When the relief coordinates obtained by the relief coordinate conversion means 14 are used as relief gradation image data as they are, the relief gradation image data generation means 15 is not necessary.

  In the fifth step, the line data 9 shown in FIG. 16C is generated by the line data generation means in the same direction and interval as the reference line 3.

  The sixth step forms a gradation image consisting of concave lines based on the relief gradation image data generated in the fourth step on one surface of the light transmissive substrate, An image forming body is obtained which is formed on the other surface by laser processing means for forming a line consisting of concave lines based on the line data generated in the fifth step.

  The order of the steps of the present invention is not particularly limited. However, the third step is necessary after the first step and the second step, and the fourth step is necessary after the third step. There is a need for the fifth step after the fourth step.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.

(Example 1)
Gradation image data 7 that is an aggregate of pixels in which any of density values 0 to 255 is defined on a computer as shown in FIG. Next, as shown in FIG. 17B, the reference line 3 is defined in the X direction, the interval between the reference lines 3 is defined as 200 μm, the relief 4 is defined in the Y direction, and the interval between the reliefs 4 is defined as 40 μm. 3 and the reference coordinates Q (0, 0), Q (1, 0),..., Q (m, n) obtained from the intersection of the relief 4 and the relief 4 were obtained. As shown in FIG. 16C, each reference coordinate Q is made to correspond to the pixel density at the pixel position of the gradation image data 7, and the reference coordinate Q (0, 0 ), Q (1, 0),... Q (m, n) are converted into relief coordinates q (0, 0), q (1, 0),... Q (m, n). At this time, the height h was moved only in the Y coordinate without moving the X coordinate. The range of the height h at this time was produced within the range of 100 μm> height h ≧ 0. In addition, the lowest density area of the gradation image data has a maximum value of height h, and the highest density area has a minimum value of height h. The change in the height h of the relief was 100 steps. As shown in FIG. 18A, a relief line image data 8 was obtained by forming a line 6 a having a relief pattern in which the reference coordinates Q and the relief coordinates q are joined by connecting lines in the reference line direction. Further, the line data 9 shown in FIG. 18B was obtained in the same direction and interval as the reference line 3.

  As shown in FIG. 19A, a relief gradation image obtained on a computer using a carbon dioxide laser of a laser processing machine on the surface of a light-transmitting substrate 1 made of a PET substrate having a thickness of about 300 μm. An image 2 was formed from the data 8 by a line 6 a having a relief pattern 4. The image 2 was formed by a concave line 5a that does not penetrate the light-transmitting substrate 1. The concave line 5a was formed in the X direction with a width of the concave line of about 80 μm, a pitch of about 200 μm, and a depth of about 50 μm.

  Next, as shown in FIG. 19 (b), the carbon dioxide gas laser of the laser processing machine is used to make a line consisting of concave lines 5b on the back surface of the light-transmitting substrate 1 from the line data 9 obtained on the computer. Line 6b was created. The image 2 was formed by a concave line 5a that does not penetrate the light-transmitting substrate 1. The concave line 5b has a concave line width of about 80 μm, a pitch of about 200 μm, and a depth of about 50 μm in the same direction as the concave line 5a formed on the surface 1a on the back surface of the area where the image 2 of the front surface 1a is formed. An image forming body B1 shown in FIG. 20 was obtained.

  As shown in FIG. 21, the obtained image forming body B1 shows the image forming body in the transmitted light or reflected light state, as shown in FIG. 20, under the visible light, from the X1 direction or the X2 direction to the vertical direction with the naked eye. The gradation image 2 ′ can be observed by gradually reversing from the positive image to the negative image when the image is observed while being tilted gradually in the horizontal direction.

It is explanatory drawing of the concave line 5 which has the predetermined width W formed in the transparent base material 1 of this invention. It is a figure which shows the image 2 formed in one surface 1a of image forming body A1, and its one part expanded sectional view. It is explanatory drawing about the height h of the relief of the relief pattern 4. FIG. It is explanatory drawing about the angle which a reference line and a coupling line make. It is a figure which shows the parallel line 6b which consists of the concave line 5b formed in the other surface 1b of image forming body A1, and its one part expanded sectional view. It is a figure which shows image forming body A1 and its one part expanded sectional view. It is a figure at the time of observing with respect to the image forming body A1 with the naked eye under visible light with an incident angle of 45 ° from the X1 or X2 direction. It is a figure which shows the relationship between the incident light, scattered light, and transmitted light quantity with respect to each concave line in image forming body A1. FIG. 7 is a view when the image forming body A1 shown in FIG. 6A is observed by being gradually tilted from the vertical direction to the horizontal direction with the naked eye under visible light having an incident angle of 45 ° from the X1 or X2 direction. It is the figure which showed a mode that the overlapping state of the concave lines 5a and 5b each formed in the front and back of the transparent base material 1 changed depending on an observation direction. It is a figure at the time of forming a some image. It is a figure which shows the preparation apparatus of an image forming body. It is a flowchart of the manufacturing method of an image forming body. It is explanatory drawing accompanying the flowchart of the manufacturing method of an image forming body. It is explanatory drawing accompanying the flowchart of the manufacturing method of an image forming body. It is explanatory drawing accompanying the flowchart of the manufacturing method of an image forming body. 3 is an explanatory diagram for producing an image forming body of Example 1. FIG. 3 is an explanatory diagram for producing an image forming body of Example 1. FIG. 3 is an explanatory diagram for producing an image forming body of Example 1. FIG. 1 is a diagram illustrating an image forming body B1 of Example 1. FIG. It is a figure at the time of observing the image forming body B1 gradually tilted from the vertical direction to the horizontal direction with the naked eye from the X1 direction or the X2 direction under visible light.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light transmissive base material 1a One surface of a light transmissive base material 1b The other surface of a light transmissive base material 2 Image 2 'Gradation image 2a First image 2b Second image 3a, 3b Reference line 3a1 First 1 reference line 3a2 2nd reference line 4 relief pattern 5, 5a, 5a1, 5a2, 5b concave line 5a3 connecting line 6, 6a, 6b 10,000 lines 7 gradation image data 8 relief gradation image data 90,000 line data 11 Image forming body manufacturing apparatus 12 Image acquisition means,
13 Reference coordinate generation means 14 Relief coordinate conversion means 15 Relief gradation image data generation means 160,000 line data generation means 17 Laser processing means A1, B1 Image forming body h, h2, h3 Relief height Ia Incident light Ib Scattered light Ic Refraction light P1, P2 Predetermined interval Q Each reference coordinate W, W1, W2 Predetermined width X1, X2 Predetermined direction

Claims (10)

An image is formed on the light transmissive substrate, the image is formed by a concave line having a relief pattern regularly arranged on one surface of the light transmissive substrate,
The height of the relief pattern is changed in n stages (n is an integer of 3 or more) for each density corresponding to the original image,
An image forming body, wherein concave lines are regularly arranged corresponding to regions where the image is formed on the other surface of the light-transmitting substrate. The concave line having the regularly arranged relief pattern is formed by arranging concave lines having a first predetermined width in a first predetermined interval and in a first predetermined direction,
A concave line regularly arranged on the other surface of the light-transmitting substrate corresponding to the area where the image is formed is a concave line having a second predetermined width. Arranged in a predetermined interval and in a second predetermined direction,
2. The image forming body according to claim 1, wherein the first predetermined interval and the second predetermined interval are the same, and the first predetermined direction and the second predetermined direction are the same. 3. The image forming body according to claim 1, wherein the maximum value of the height h that changes in n stages is: first predetermined interval−first predetermined width> height h. 4. The minimum value of the height h that changes in n steps is a position of a reference line for forming a concave line having a regularly arranged relief pattern. 3. The image forming body according to 3. The relief is connected with a concave line that changes in n steps (n is an integer of 3 or more) at a height h and a concave line that does not change from the reference line by a coupling line, and the angle of the coupling line is The image forming body according to claim 1, wherein the image forming body is in a range of 0 to 90 ° with respect to the reference line. The image forming body according to claim 1, 2, 3, 4, or 5, wherein the second predetermined width is equal to or less than a first predetermined interval minus a first predetermined width. The image forming body according to claim 1, 2, 3, 4, or 5, wherein the relationship between the first predetermined width and the second predetermined width is the same or substantially the same. The first predetermined width and the second predetermined width are 30 to 500 μm, and the first predetermined interval and the second predetermined interval are in a range of 70 to 2000 μm. The image forming body according to 2, 3, 4, 5, 6 or 7. In the method for producing an image forming body,
Obtaining gradation image data that is a collection of pixels in which density values associated with the original image are defined;
Define the direction and interval of the reference line, the direction and interval of the relief interval, and each reference coordinate Q (0,0), Q (1,0),... Q (m , N),
Each of the reference coordinates Q corresponds to the pixel density at the pixel position of the gradation image data, and the reference coordinates Q (0,0), Q (1,0),. Converting Q (m, n) into relief coordinates q (0,0), q (1,0),... Q (m, n) to generate relief gradation image data;
Generating line data in the same direction and interval as the reference line;
A gradation image composed of concave lines is formed on one surface of the light-transmitting substrate based on the relief gradation image data, and the region of the gradation image is formed on the other surface of the light-transmitting substrate. Correspondingly, a method for producing an image forming body formed by a step of forming a line consisting of concave lines based on the line data. In the method for producing an image forming body,
Obtaining gradation image data that is a collection of pixels in which density values associated with the original image are defined;
Define the direction and interval of the reference line, the direction and interval of the relief interval, and each reference coordinate Q (0,0), Q (1,0),... Q (m , N),
Each reference coordinate Q is made to correspond to the pixel density at the pixel position of the gradation image data, and the reference coordinates Q (0,0), Q (1,0), ... converting Q (m, n) to relief coordinates q (0,0), q (1,0), ... q (m, n);
Combining the relief coordinates q by a connecting line to generate relief gradation image data;
Generating line data in the same direction and interval as the reference line;
A gradation image composed of concave lines is formed on one surface of the light-transmitting substrate based on the relief gradation image data, and the region of the gradation image is formed on the other surface of the light-transmitting substrate. Correspondingly, a method for producing an image forming body formed by a step of forming a line consisting of concave lines based on the line data.

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