JP5652789B2 - 3D printed material - Google Patents

Description

  The present invention relates to a three-dimensional printed material and a method for determining authenticity that can create a stereoscopic image for banknotes, passports, securities, gift certificates, various certificates, and the like for the prevention of counterfeiting and duplication, and can be stereoscopically viewed. is there.

  Conventionally, forgery-preventing printed matter such as banknotes, passports, gift certificates, and various certificates has been required to be provided with anti-counterfeiting techniques, and various techniques have been disclosed. For example, watermarks or threads that give anti-counterfeiting technology in the manufacturing process of the base paper, fine intaglio printing or pearl printing that gives anti-counterfeiting technology in the printing process, and forgery in another process after the printing process Typical examples include holograms or laser drilling that provide a prevention technique.

  Among these techniques, intaglio printing is one of anti-counterfeiting techniques that are relatively inexpensive and have high anti-counterfeiting power. The reason for this is that many counterfeiters often produce counterfeit products with a simple output device such as a printer, and therefore can only produce counterfeit products with a low ink film thickness and a two-dimensional configuration. It will be. On the other hand, the intaglio printed material has a raised image line and can be distinguished by tactile sensation.

  A latent image intaglio using intaglio printing is also an effective technique. Here, the structure of the printed matter P ′ of the known latent image intaglio 1 ′ will be described with reference to the drawings. FIG. 23 shows the configuration of the printed matter P ′ of the latent image intaglio 1 formed by intaglio printing, in which the latent image intaglio 1 ′ is formed on a substrate such as paper. As shown in FIG. 24, the printed matter P ′ includes a latent image portion A ′ and a background portion B ′, and includes a plurality of horizontal image lines aL ′ of the latent image portion A ′ and a plurality of vertical image lines bL of the background portion B ′. ′ Is regularly arranged and formed with a raised image line. FIG. 24 is an enlarged view of the rectangular portion of FIG.

  Next, the latent image of the printed material P ′ will be described with reference to FIGS. 25 and 26. FIG. 25 shows an observation direction with respect to the printed matter P ′. The observation direction U ′ is observing the latent image intaglio 1 ′ from directly above, while the observation direction N ′ is relative to the latent image intaglio 1 ′. Observing from an oblique direction. At this time, in the observation direction U ′ (directly upward direction), the latent image “T” cannot be observed because the line area ratios per unit area of the latent image portion A ′ and the background portion B ′ are the same. .

  On the other hand, when observed from the observation direction N ′ (oblique direction), as shown in FIG. 26, the horizontal image line aL ′ of the latent image portion A ′ is perpendicular to the observation direction, and the raised horizontal image line aL ′ is not By concealing part or all of the image line portion, the apparent visual density increases. On the other hand, since the vertical image line bL ′ of the background part B ′ is parallel to the observation direction, the density of the non-image part does not change. As a result, a density difference is generated in each region, and the latent image “T” including the latent image portion A ′ can be observed. Therefore, the latent image of the present invention refers to an image in which the latent image intaglio 1 ′ can be observed from an oblique direction and the latent image portion A ′ can be observed. As described above, various techniques for latent image intaglio have been proposed (see, for example, Patent Document 1).

  By the way, a technique for producing a printed material observed stereoscopically by producing a stereoscopic image on the printed material is also widely disclosed in printing magazines and the like. For example, as a method of forming an image that can be viewed stereoscopically, an image to be observed with the right eye (hereinafter referred to as “right eye image”) and an image to be observed with the left eye (hereinafter referred to as “left eye image”) are respectively arranged. A method is disclosed in which a stereoscopic image can be observed by cross-viewing by arranging the images side by side and printing them by offset printing or the like. In addition, a technique that enables stereoscopic viewing with the naked eye, and a technique that allows a stereoscopic image to be observed using a tool such as a color filter or a lenticular lens are disclosed.

Japanese Patent Publication No. 56-19273

  However, in the printed matter having the latent image intaglio 1 'of Patent Document 1, when the latent image intaglio 1' is observed from the observation direction N '(oblique direction) as shown in FIG. Since the latent image can be observed based on the difference in density with each other, the authenticity of the latent image is determined based on a “planar image” having only a simple density difference, and the authenticity is further enhanced. There was a need for a method that could be distinguished.

  Further, as shown in FIG. 25, the printed matter having the latent image intaglio 1 ′ is shown in FIG. 27 when the latent image intaglio 1 ′ is observed from the observation direction U ′ (directly upward direction) and the observation direction N ′ (oblique direction). Therefore, a new true / false discrimination method has been demanded since it can be observed by “normal vision”. Furthermore, since the printed matter having the latent image intaglio 1 ′ needs to form two areas of the latent image portion A ′ and the background portion B ′ that form the latent image intaglio 1 ′, a relatively large area is required. There has been a problem that it is impossible to provide a latent image intaglio or a three-dimensional image by diverting a design of existing securities, for example, a fee, a symbol, or a design.

  As for the technology for observing a three-dimensional image, a three-dimensional printed product P ′ produced by a general printing method such as offset printing or gravure printing for each image of a right eye image and a left eye image is used as a color filter and a lenticular lens. Since the three-dimensional view can be obtained by the cross-view as shown in FIG. 28 in the state where the tool such as is used, the same effect as the three-dimensional print P ′ can be obtained for the copy obtained by copying the three-dimensional print P ′. Can be obtained. Therefore, there is a problem that there is no effect of copying and duplication prevention. In the case of forming a stereoscopic image, the stereoscopic image has a problem that a relatively large area is required because the stereoscopic image is configured by arranging the right-eye image and the left-eye image.

  Further, since the three-dimensional printed material P ′ can observe a three-dimensional image in any observation direction, a latent image cannot be observed at a predetermined observation angle like a latent image intaglio. Since there is no discriminating method capable of observing a latent image with only the viewing angle, a printed material having a new authenticity discriminating method has been demanded.

  The present invention has been considered in view of the above-described problems. By forming a right-eye image and a left-eye image with an image line having a bulge, a stereoscopic image can be observed only with a copy, anti-duplication effect, and a predetermined observation direction. It is a three-dimensional printed material that can form a three-dimensional image without requiring a large area as compared with a printed material having a latent image intaglio and a three-dimensional image.

  The three-dimensional printed material of the present invention is a three-dimensional printed material in which a three-dimensional image is formed on at least a part of a base material by an image line having a bulge, and the above-described three-dimensional image is a pair of second images arranged in the same shape. The first image region and the second image region are arranged so as to be superposed in a state inclined at a predetermined angle in a direction opposite to the starting point along the center of each image along the first direction. , One of a right-eye image and a left-eye image formed by concentric arcs formed regularly with a predetermined line width by a swelled line or a radial line, and the second image area is The other of the right eye image and the left eye image formed by concentric arcs or radial lines formed regularly with a predetermined line width by a swelled image line is formed. Images and A two-dimensional image with overlapping eye images is observed, and when a three-dimensional image is tilted at a predetermined angle, the right-eye image and the left-eye image are observed so as to cross each other, so that a three-dimensional three-dimensional image can be observed. It is characterized by.

  Further, the three-dimensional printed material of the present invention is characterized in that the central axes of the right eye image and the left eye image are different by 3.7 to 7.4 degrees.

  Further, the three-dimensional printed material of the present invention is characterized in that a concentric arc or radial line width is 0.005 to 0.05 mm.

  The three-dimensional printed material of the present invention is characterized in that the line pitch of concentric arcs is 0.1 to 1.0 mm.

  Further, the three-dimensional printed material of the present invention is characterized in that the height of concentric arcs or radial lines is 0.1 to 1.0 mm.

  Furthermore, the right-eye image and the left-eye image in the three-dimensional printed material of the present invention are characterized in that a frame image in which the contour of each image is formed is formed.

  The three-dimensional image in the three-dimensional printed material according to the present invention cannot be stereoscopically viewed when viewed from directly above, but can be viewed stereoscopically only when viewed from the predetermined observation direction by “cross-view”. A printed matter having a false discrimination method is obtained.

  In addition, since the three-dimensional printed material of the present invention is formed with an image line configuration such as intaglio printing, a two-dimensional image can be observed when viewed from directly above, and a three-dimensional image when viewed from an oblique direction. Is observed.

  In addition, when the three-dimensional printed material of the present invention is copied or copied by a copying machine or a printer, the image line having a swell is not reproduced.When viewed from an oblique direction, the three-dimensional image of the present invention is black and the visual density changes. The visual density when observed from directly above is maintained and the visual density does not change. Therefore, since a stereoscopic image is not observed in the copied material, there is an effect that an advanced copying and anti-duplication effect is obtained.

  In addition, the three-dimensional image of the three-dimensional printed material of the present invention does not require two large areas for forming a latent image portion and a background portion, unlike the conventional latent image intaglio, so that the degree of freedom in design is high. Play.

Schematic diagram showing conventional printed matter Schematic diagram showing the three-dimensional printed material of the present invention The figure which shows the right-eye image of this invention The figure which shows the left eye image of this invention The figure which shows the stereo image of this invention The figure which shows the observation direction of the three-dimensional printed matter of this invention Schematic diagram of stereoscopic view of the three-dimensional printed material of the present invention Schematic diagram showing a stereoscopic image of the present invention Enlarged view of the stereoscopic image of the present invention The figure which shows the angle of the stereo image of this invention The figure which shows an example of the three-dimensional printed matter of this invention The figure which shows the right-eye image of this invention The figure which shows the left eye image of this invention The figure which shows the stereo image of this invention Schematic diagram of stereoscopic view of the three-dimensional printed material of the present invention Enlarged view of the stereoscopic image of the present invention Schematic diagram of stereoscopic view of the three-dimensional printed material of the present invention Enlarged view of the stereoscopic image of the present invention The figure which shows an example of the three-dimensional printed matter of this invention Enlarged view of the stereoscopic image of the present invention Schematic diagram of stereoscopic view of the three-dimensional printed material of the present invention Enlarged view of the stereoscopic image of the present invention Schematic diagram showing a conventional latent image intaglio Enlarged view of conventional latent image intaglio The figure which shows the observation direction of the conventional latent image intaglio The figure which shows the latent image image of the conventional latent image intaglio Diagram showing observation method by normal vision Diagram showing observation method by cross-view

  Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments to be described below, and includes various other embodiments within the scope of the technical idea described in the claims.

  A feature of the present invention is that an image that is stereoscopically observed when a stereoscopic image is created using the form and area of the fee, symbol, mark, and design of existing securities and observed from a predetermined observation direction. Is what you get. For this reason, for example, it demonstrates by the method of expand | deploying to the stereo image of this invention using the fee of the existing gift certificate. The three-dimensional image of the present invention may be created by designing new fees, symbols, marks and designs of securities. Note that the “stereoscopic view” of the present invention is one in which a stereoscopic image can be observed by a predetermined observation method, and the image has a three-dimensional effect and a sense of depth.

  FIG. 1 shows a fee S ′ of an existing gift certificate P ′. The fee S ′ is observed as a two-dimensional image because of a general image line configuration provided by intaglio printing. The 2A is an enlarged view of only one “0” in “1000” of the fee S ′ of FIG. 1, and FIG. 2B is an outline of “0” (hereinafter “frame”). Only image F ") is extracted. In FIG. 2C, two frame images F having the same size are prepared, and a first frame image 1F formed as a right eye image L and a second frame image 2F formed as a left eye image R are It is the figure which changed and changed the angle in the direction which opposes a center along the 1st direction. A three-dimensional printed material can be produced by providing raised image lines in each frame image. The center of the right eye image L and the left eye image R in the present invention refers to a point that intersects when drawing an image line that passes through the center in the vertical and horizontal directions of the reference image. In the following description, only the configuration “0” will be described below so that the configuration of the present invention can be better understood.

(First embodiment)
The configuration of the three-dimensional printed material in the first embodiment will be described. 3 shows the configuration of the right eye image L, and FIG. 4 shows the configuration of the left eye image R. First, the right eye image L is produced by arranging a plurality of concentric arcs Lg provided around the right eye M as shown in FIG. Next, the concentric arc Lg is arranged in the first frame image 1F. First, as shown in FIG. 3B, the vertical center line 1FL of the frame image 1F is arranged directly above the right eye M. Thereafter, the frame image 1F is tilted by the angle θ, and only the concentric arc Lg in the frame image 1F is selected, so that the right eye image L shown in FIG. At this time, assuming that the moving distance x in the X-axis direction, the right eye M, and the observation distance to the center of the frame image 1F are d, the angle at which the frame image 1F is tilted is obtained by the following equation.

  Next, the left eye image R shown in FIGS. 4A to 4C is produced by the same method as the right eye image L, and the concentric arc Rg in the second frame image 2F is selected. The left-eye image R shown in 4 (c) is obtained. FIG. 5A is a diagram in which the right-eye image L shown in FIG. 3C and the left-eye image R shown in FIG. 4C are combined, and the fee for the combined stereoscopic image 3D in FIG. By providing S with a raised image line such as intaglio printing, the three-dimensional printed material P of the present invention can be produced. Note that the movement distance x in the X-axis direction between the right eye image L and the left eye image R is the same, and is ½ of the distance X between the right eye M and the left eye H. Further, in the synthesis of the left-eye image R and the right-eye image L, it is desirable that the centers of the respective images coincide with each other in the upward direction from the intermediate position of the distance X between the right eye M and the left eye H. The reason is to obtain higher readability by matching the readability of a stereoscopic image from directly above, which will be described later. However, even if the centers of the respective images are slightly different, the centers of the respective images do not necessarily have to coincide with each other as long as the readability of the stereoscopic image from directly above is not taken into consideration.

  The line width of the concentric arc Lg of the right eye image L and the concentric arc Rg of the left eye image R can be in the range of 0.005 to 0.05 mm, preferably 0.01 to 0.025 mm. . Next, the line pitch P of the concentric arc Lg and the concentric arc Rg can be in the range of 0.1 to 1.0 mm, preferably 0.02 to 0.05 mm. Furthermore, the line height T of the concentric arc Lg and the concentric arc Rg can be in the range of 0.1 to 1.0 mm, preferably 0.02 to 0.08 mm. Further, since the interval K between the right eye M and the left eye H is generally said to be 62 to 68 mm, it may be appropriately selected. The observation distance d can be in the range of 250 mm to 500 mm, preferably 300 mm to 450 mm. The “concentric arc” in the present invention is a concentric drawing line centering on the left eye H or the right eye M, and the “drawing line pitch” means a drawing interval between adjacent concentric arcs.

  Next, the principle of visual recognition of a stereoscopic image in the first embodiment will be described with reference to FIG. As shown in FIG. 6 (a), when the fee S shown in FIG. 5 (b) is observed from the oblique direction N shown in FIG. The raised concentric arc Lg of the right eye image L hides the non-image area, and the right eye image L can be observed black. On the other hand, in the left eye H, the raised concentric arc Rg of the left eye image R hides the non-image portion, and the left eye image R can be observed black. Therefore, in the right eye M, only the right eye image L is observed, and in the left eye M, only the left eye image R is observed, but in the brain, it is recognized as a state in which the images observed by both eyes are combined. Is done. As a result, as shown in FIG. 7, since the stereoscopic effect and the depth effect can be obtained in the image, the fee S can be stereoscopically viewed.

  As described above, by using concentric arcs for the right eye image L and the left eye image R, when the fee S is observed by “crossing” from the oblique direction N, the right eye M and the left eye H are concentric arcs at any observation position. The non-image area is equally concealed by the image line height, and the right-eye image L and the left-eye image R are the same image and have the same density, so that stereoscopic viewing can be achieved. Further, since the stereoscopic image can be obtained without the frame image 1F of the right eye image L and the frame image 2F of the left eye image R, the frame image need not be provided. The observation distance refers to the distance from the right eye M and the left eye M to the intersection when observed by cross-viewing.

  Further, a case will be described in which the fee S of the stereoscopic image 3D is observed by “crossing” or “normal” from the directly above direction U shown in FIG. The fee S includes a right-eye image L and a left-eye image R formed by concentric arcs having the same line width and line pitch. When observing with “normal viewing”, the concentric arc does not hide the non-image portion, so the fee S cannot be stereoscopically viewed and is observed as a general two-dimensional image.

  In addition, when the fee S of the stereoscopic image 3D is observed from directly above, the readability as an image is also important. Therefore, the image readability according to the observation distance and the shift amount of the right eye image L and the left eye image R will be described. FIG. 8 is a schematic diagram in which three “0” s of the charge S of the stereoscopic image 3D produced with the configuration of the present invention are arranged. The three “0” s have different observation distances d. The upper “0” is the observation distance d 400 mm, the middle “0” is the observation distance d 300 mm, and the lower “0” is the observation distance d. 200 mm. 9A shows a state where “0” in the upper part of FIG. 8 is observed, and FIG. 9B shows a state where “0” in the middle part of FIG. 8 is observed. FIG. 9C shows a state where “0” in the lower part of FIG. 8 is observed.

  When comparing the observed images shown in FIGS. 9A to 9C described above, the shift amount between the right eye image L and the left eye image R decreases as the observation distance d increases, and the frame shown in FIG. Since it approaches the image F, it becomes easy to read as information. In other words, if the amount of deviation between the right-eye image L and the left-eye image R is large, the readability as information deteriorates, which is not suitable as a security design. Accordingly, the design distance can be maintained by setting the observation distance d to 250 mm to 500 mm, preferably 300 mm to 450 mm. On the other hand, when the observation distance d is 500 mm or more, the amount of deviation between the right eye image L and the left eye image R is further reduced, and the readability of the image when viewed from directly above U is high. As the observation distance increases, it becomes impossible to accurately observe the image line of the concentric arc, and it becomes difficult to observe the image stereoscopically.

  FIG. 10 shows the center line 1FL of the right eye image L and the center line 2FL of the left eye image R. When the distance between the right eye M and the left eye H is 65 mm, the angle 2θ between the center line 1FL and the center line 2FL is as shown in FIG. 4 and the above-described formula. For example, when the observation distance d is 250 mm, the angle 2θ is about 3.7 degrees, and when the observation distance d is 500 mm, the angle 2θ is about 7.4 degrees.

  Although the configuration of the present invention has been described with a configuration of only “0”, when “1000” of the entire fee is produced by the above configuration, the fee S ′ of the existing gift certificate P ′ in FIG. As shown in FIG. 11, by creating the fee S of the stereoscopic image 3D as a gift certificate P with the configuration of the present invention, a stereoscopic image “1000” that is observed by cross-viewing at a predetermined observation angle appears. .

  The three-dimensional image 3D of the three-dimensional printed material P of the present invention cannot be stereoscopically viewed from the direction U directly above, but a three-dimensional image can be observed by observing “crossing” from the oblique direction N. Therefore, the configuration for further improving the stereoscopic view of the stereoscopic image 3D may increase the contrast of the image when stereoscopically viewed. Specifically, a pattern having a blank portion inside the stereoscopic image, for example, “0”, “8”, “9”, “A”, “D” for a character number, “O” for a symbol, “△”, “☆” and the like. The reason is that, when the visual density inside the image when stereoscopically viewed is lowered, the apparent visual density in the image contour is increased, and stereoscopic viewing is facilitated.

(Second Embodiment)
The three-dimensional printed material P in the second embodiment will be described. The description of the same configuration as that of the first embodiment of the present invention will be omitted. FIG. 12 shows the configuration of the right eye image L, and FIG. 13 shows the configuration of the left eye image R. First, the method for producing the right eye image L is arranged with a plurality of radiations Lg provided around the right eye M as shown in FIG. Next, the radiation Lg is arranged in the first frame image 1F. First, the center line 1AL in the vertical direction of the frame image 1F is arranged directly above the right eye M, and as shown in FIG. After the frame image 1F is tilted by the angle θ, only the radiation Lg in the frame image 1F is selected, resulting in the right eye image L shown in FIG. At this time, if the moving distance x in the X-axis direction, the right eye H, and the observation distance to the center of the frame image 1F are d, the angle θ can be obtained by the above-described equation.

  Next, the left eye image R shown in FIGS. 13A to 13C is produced by the same method as the right eye image L, and the left eye image R is selected by selecting the radiation Rg in the second frame image 2F. It becomes. Further, FIG. 14A is a diagram in which the right-eye image L in FIG. 12 and the left-eye image R in FIG. 13 are combined, and FIG. 14B is an intaglio printing of the charge S of the combined stereoscopic image 3D. The three-dimensional printed material P of the present invention can be produced by providing the image line having a swell.

  The line width of the radiation Lg of the right eye image L and the radiation Rg of the left eye image R can be in the range of 0.005 to 0.05 mm, preferably 0.01 to 0.025 mm. The line pitch P of the radiation Lg and the radiation Rg can be in the range of 0.1 to 1.0 mm, preferably 0.02 to 0.05 mm. The line height T of the radiation Lg and the radiation Rg can be in the range of 0.1 to 1.0 mm, preferably 0.02 to 0.05 mm. The “radiation” in the present invention is an image line of a straight line group that is different from the left eye H or the right eye M by a predetermined angle, and the “image line pitch” is within the right eye image L and the left eye image. The interval between adjacent radiation lines in R.

  Next, the principle of viewing a stereoscopic image in the second embodiment will be described with reference to FIGS. As shown in FIG. 6 (a), when the fee S shown in FIG. 14 (b) is observed from the oblique direction N in FIG. 6 (a) in the “crossing view” in FIG. 6 (b), the right eye M When the radiation Lg that rises in the image L is regularly arranged in a straight line, the visual density increases, and the right eye image L can be observed in black. In the left eye H, the radiation Rg that rises in the left eye image R is regular. By arranging them linearly, the visual density increases, and the left-eye image R can be observed in black. Therefore, in the right eye M, only the right eye image L is observed, and in the left eye M, only the left eye image R is observed, but in the brain, it is recognized as a state in which the images observed by both eyes are combined. Is done. As a result, as shown in FIG. 15, since the image can feel a three-dimensional effect and a depth, the fee S of the present invention is observed as a three-dimensional image. In addition, by using radiation for the right eye image L and the left eye image R, the fee S can be observed as a regular straight line at any observation position when observed from an oblique direction N in “cross-view”. As a result, the right-eye image L and the left-eye image R can be observed as the same image and a stereoscopic image with the same density. Note that the visibility of the two-dimensional image from the directly above direction U, the readability of the image, and the optimal stereoscopic configuration are the same as those in the first embodiment, and thus the description thereof is omitted.

  Embodiments of the present invention will be described below. In Embodiments 1 and 2, a stereoscopic image is formed on the fee portion, and in Embodiments 3 and 4, a stereoscopic image is formed on the character portion. It is a thing. In addition, Example 1 and Example 3 have the configurations described in the above-described first embodiment, and Example 2 and Example 4 have a configuration described in the above-described second embodiment, and a three-dimensional printed material is obtained. It was produced.

  Example 1 is a three-dimensional printed material in which the fee S of the gift certificate P in the first embodiment described above is a three-dimensional image 3D. For example, as shown in FIG. 11, the fee S is set as a stereoscopic image 3D using black ink by intaglio printing on white paper. FIG. 15 is an enlarged view of the charge S. The drawing line width of the concentric arc Lg of the right eye image L and the concentric arc Rg of the left eye image R is 0.12 mm, and the drawing line pitch P of the concentric arc Lg and the concentric arc Rg is shown. Was 0.25 mm, and the line height T of the concentric arc Lg and the concentric arc Rg was 0.03 mm. The observation distance d is 400 mm, and the distance K between the right eye M and the left eye H is 65 mm.

  When the fee S in the gift certificate P of Example 1 is observed from directly above U, the fee S is observed as a two-dimensional image and cannot be observed as a three-dimensional image. On the other hand, when the fee S was observed from the diagonal direction N by “crossing”, the fee S could be observed three-dimensionally as shown in FIG. Therefore, the three-dimensional printed material in Example 1 has an image line structure that is raised by intaglio printing, and a two-dimensional image is observed when viewed from directly above U without using a lenticular lens or the like. It was possible to perform an advanced authenticity determination that a stereoscopic three-dimensional image can be observed by observing with “cross vision”.

  In addition, when the three-dimensional printed material in Example 1 is copied and duplicated with a copying machine or a printer, the raised lines of the concentric arc Lg and the concentric arc Rg become flat lines, and thus the case is observed from an oblique direction. Since the non-image portion formed in the fee S is not concealed, the visual density when observed from directly above U is maintained, and the visual density does not change. Accordingly, it has been found that the stereoscopic effect that the stereoscopic image at the fee S of the copy can be observed is remarkably reduced, and thus has a high copy prevention effect. Note that even if the stereoscopic image of the present invention is produced with a flat image line such as offset printing that is not prominent, a stereoscopic image can be observed with low visibility, but is copied and reproduced. In this case, since the configuration is the same as that of a genuine printed matter, the effect of viewing a stereoscopic image is the same, and thus there is no copy / duplication prevention effect.

  The three-dimensional printed matter in Example 2 is a gift certificate P produced from the fee S of Example 1 by the image line configuration in the second embodiment described above. For this reason, the description of the same configuration as in the first embodiment is omitted. FIG. 18 is an enlarged view of the charge S. The line width of the radiation Lg of the right eye image L and the radiation Rg of the left eye image R is 0.12 mm, and the line pitch P of the radiation Lg and the radiation Rg is 0.1. The line height T of the radiation Lg and the radiation Rg was 0.03 mm. The visually recognized images in the respective observation directions and the effects thereof are the same as those in the first embodiment. In addition, when the fee S was observed from the oblique direction by “crossing”, the fee S could be observed as a three-dimensional image as shown in FIG.

  As shown in FIG. 19, the three-dimensional printed material in Example 3 is obtained by forming a character J of “1000 yen” as a three-dimensional image 3D, and FIG. 20 is an enlarged view of the character J in FIG. 19. Note that the frame image of the right eye image L, the frame image of the left eye image R, and other configurations are the same as in the first embodiment, and thus the description thereof is omitted.

  When the three-dimensional printed material in Example 3 is observed from right above the direction U, the character J is observed as a two-dimensional image. However, when observed from the oblique direction N by “crossing”, as shown in FIG. J could be observed as a stereoscopic image.

  The three-dimensional printed material in Example 4 is an example in which the letter J of Example 3 is configured in the second embodiment as shown in the enlarged view of the three-dimensional image 3D in FIG. Note that the frame image of the right eye image L, the frame image of the left eye image R, and other configurations are the same as in the first embodiment, and thus the description thereof is omitted.

  When the three-dimensional printed material in Example 4 is observed from right above the direction U, the character J is observed as a two-dimensional image. However, when observed from the oblique direction N in “cross-view”, as shown in FIG. J could be observed as a stereoscopic image.

P Solid print P 'Print S, S' Fee J Character 3D Stereo image F, 1F, 2F Frame image L Right eye image R Left eye image Lg, Rg Concentric arc, Radiation M Right eye H Left eye X Moving distance in X axis d Observation Distance P Image line pitch U, U ′ Observation direction from directly above N, N ′ Observation direction from oblique direction 1 Latent image intaglio A Latent image part B Background part aL Horizontal image line bL Vertical image line 2θ Center line 1FL and center line Angle with 2FL

Claims (6)

A three-dimensional printed material in which a three-dimensional image is formed on at least a part of a base material by an image line having a bulge, and the three-dimensional image includes a pair of first image regions and second images arranged in the same shape The image area is arranged so as to be overlapped in a state where the center of each image is inclined at a predetermined angle in a direction opposite to the starting point,
In the first image area, either a right eye image or a left eye image formed by a concentric arc or a radial image line regularly formed with a predetermined image line width by the raised image line is formed. ,
In the second image region, the other of the right-eye image and the left-eye image formed by concentric arcs or radial image lines regularly formed with a predetermined image line width by the raised image line is formed,
When the stereoscopic image is observed from directly above, one two-dimensional image in which the right eye image and the left eye image overlap is observed,
A three-dimensional printed material characterized in that when the stereoscopic image is observed at a predetermined angle, a stereoscopic three-dimensional image can be observed by observing the right eye image and the left eye image intersecting each other. The three-dimensional printed material according to claim 1, wherein central axes of the right eye image and the left eye image are different from each other by 3.7 to 7.4 degrees. The three-dimensional printed material according to claim 1, wherein the concentric arc or the radial line width is 0.005 to 0.05 mm. The three-dimensional printed matter according to any one of claims 1 to 3, wherein a line pitch of the concentric arcs is 0.1 to 1.0 mm. The three-dimensional printed material according to any one of claims 1 to 4, wherein the concentric arcs or the radial image line height is 0.1 to 1.0 mm. 6. The three-dimensional printed material according to claim 1, wherein the right-eye image and the left-eye image are formed with a frame image in which an outline of each image is formed.

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