JP2006224416A - Image formation object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image formation object which is applied to valuables requiring forgery/falsification proofness for the protection of a bank note, passport, card, merchandise tag and brand. <P>SOLUTION: This image formation object has a basic image formed of pixels arranged at a specified interval on the surface of a light transmitting layer, on a base material laminated with a light reflecting layer and the light transmitting layer. In addition, the basic image is segmented in a first region and a second region, and the pixel is shaped like a recess or a through hole with a specific depth and has an edge part with a protuberance formed rising from the surface of the light transmitting layer. Further, the pixels forming the first region and the second region are different from each other in terms of shape, size and pixel angle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an image forming body applied to a valuable item that needs to be prevented from forgery and tampering such as banknotes, passports, cards, product tags, and brand protection.

Valuables such as banknotes, passports, cards, product tags, and brand protection are required to be difficult to forge and tamper by nature. As a preventive measure, there is known a technique for performing authenticity discrimination so that a latent image can be recognized by observing these valuables at an angle. Examples include those that use the image line structure of intaglio printed matter, those that use a change in shape of perforations, and those that use the depth of unevenness.

Utilizing the image line structure of the intaglio printed material to make a latent image appear, for example, an image line portion that becomes a latent image on the intaglio printed line is composed of a high image line, and other lines are hidden. It is composed of an image line lower than the image line portion that becomes an image image. Although a latent image cannot be visually recognized when the printed matter is observed from directly above, a latent image is disclosed when observed with an inclination (see Patent Document 1).

Utilizing the shape change of the perforation to make a latent image appear, for example, forming a fine perforation constituting a background portion and a perforation constituting an information portion on a substrate, and forming a perforation and information portion of the background portion When the perforation is formed so that at least one of the shape, size and pixel angle of the perforation is different, and the authenticity determination formed body is observed with reflected light, the background portion and the information portion are separated and cannot be visually recognized. In addition, a technique is disclosed in which a background portion and an information portion are visually recognized separately when observed by tilting with transmitted light (see Patent Document 2).

In a card using the depth of the unevenness, for example, a card having a mark forming portion in which a large number of fine grooves and fine protrusions are alternately engraved in parallel with each other, a part of the protrusions may There is disclosed a card characterized in that a predetermined mark is defined by the raised portion by forming the portion so as to rise (see Patent Document 3).

Japanese Examined Patent Publication No. 56-19273 (page 1-14, FIG. 1-20) Japanese Patent No. 3385461 (page 1-5, Fig. 1-3) Japanese Utility Model Publication No. 02-127478 (page 1-8, Fig. 1-4)

The above Japanese Patent Publication No. 56-19273 or Japanese Utility Model Laid-Open No. 02-127478 is generally formed by differentiating the unevenness of the image line forming the latent image region and the image line forming the background region around it. Although the latent image area is visually recognized for the first time when observed at an angle, the direction of observing the substrate or the angle at which the substrate is inclined is limited, and it is difficult to visually recognize the latent image area at a shallow angle of inclination. Met. Since the image line that forms the latent image area and the image line that forms the background area around it are formed with different irregularities, it takes time in the production process, and know-how on the appearance of the latent image due to the difference in the irregularities Was necessary. Also, in order to produce a product in which the latent image region can be visually recognized at a shallow angle, the difference between the unevenness of the image line forming the latent image region and the image forming the surrounding background region must be increased. Moreover, even if it is difficult to produce, the latent image area may be visually recognized even when observed from directly above the substrate due to the unevenness. In Japanese Patent No. 3385461, since the background portion and the information portion are visually recognized separately when observed by tilting with the transmitted light, they are not visually recognized with the reflected light, and therefore, the situation where they can be visually recognized is limited. Conventionally, it has been difficult to make a latent image different depending on the direction of observation as a whole. Further, the contrast of the visible latent image area did not change.

An object of the present invention is to solve such a conventional problem, and it is possible to form a substrate without forming a concave-convex difference between a pixel forming a latent image region and a pixel forming a background region around it. The latent image area can be viewed at a shallow angle, the latent image can be viewed with reflected light, and different latent images can appear depending on the viewing direction. It is an object of the present invention to propose an image forming body in which the brightness of a latent image region that is visually recognized varies depending on the angle at which the substrate is tilted without specifying the observation direction.

A basic image is formed on a substrate on which a light-reflective layer and a light-transmitting layer are laminated, by pixels arranged on the surface of the light-transmitting layer at specific intervals, and the basic image includes a first region and a second region. The pixel is a concave or through hole having a specific depth, and the edge of the pixel is formed with a raised portion that is raised from the surface of the light transmissive layer. The pixels forming the region and the pixels forming the second region are image forming bodies having different shapes, sizes, or pixel angles.

When the image forming body of the present invention is observed by tilting it in the horizontal direction with the naked eye under visible light, the brightness of the latent image area (that is, the latent image changes from a positive image to a negative image, and from a negative image to a positive image). (Change to image) changes, and authenticity determination can be made based on the presence or absence of the appearance of a latent image and the presence or absence of a change in negative / positive. Therefore, it is possible for anyone to determine authenticity based on whether or not the above-described effect can be obtained on the spot without using a special authenticity determination device or the like.

Furthermore, the image forming body of the present invention can embed a plurality of latent image images, and can display different latent image images depending on the viewing direction.

The pixels that form the background image and the pixels that form the latent image on the substrate on which the light reflective layer and the light transmissive layer are laminated on the substrate on which the light reflective layer and the light transmissive layer are laminated are shaped. Since the size or the angle of the pixel is formed differently, the latent image area can be viewed at a shallow angle without tilting the substrate, without making the unevenness of the pixel forming the background image and the pixel forming the latent image. Is possible. Further, since the groove-like point group and / or line group can be produced by a laser, different information (variable information) can be formed for each valuable item.

From the above, the image forming body of the present invention has a high authenticity determination effect, and is formed in a fine shape, and therefore has an effect of falsification and anti-duplication. Forgery of banknotes, passports, cards, product tags, brand protection, etc. It can be applied to valuables that require prevention and tampering prevention.

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 includes various other embodiments within the scope of the technical idea described in the scope of claims.

(First example)
FIG. 1 shows an image forming body A1 and its XX ′ sectional view. As shown in FIG. 1 (a), the substrate 1 on which the light-reflective layer 1a and the light-transmissive layer 1b are laminated, the surface of the light-transmissive layer has an X direction at an interval of pitch P1, and the Y direction is a pitch A basic image 2 is formed by pixels 5 arranged at intervals of P2, and the basic image is divided into a background image (first region) 3 and a latent image (second region) 4. The edge portion of the pixel 5 is formed of a raised portion 6 that is deeper than the surface of the light transmissive layer 1b. The pixel 5a that forms the background image and the pixel 5b that forms the latent image have different shapes. The pixel 5a that forms the background image has a raised portion 6a, and the pixel 5b that forms the latent image has a raised portion 6b. In the drawing, the pixel 5a has a circular shape, and the pixel 5b has an elliptical shape. The shape of the pixel is not limited, and the pixel 5a that forms the background image and the pixel 5b that forms the latent image need only have different shapes. The interval between the pitches P1 in the X direction and the interval between the pitches P2 in the Y direction may be the same or different. As shown in the XX ′ cross-sectional view of the image forming body A1 in FIG. 1B, the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image is the same. However, the present invention is not limited to this, and the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image may be different.

FIG. 2A is a diagram when the image forming body A1 is observed from the vertical direction with the naked eye under visible light having an incident angle of 45 ° from the X1 or X2 direction. As shown in FIG. 2B, a part of the incident light I1 is irregularly reflected I2 on the raised portion 6a raised from the surface of the pixel 5a forming the background image 3, and the reflected light I3 is obtained. A part of the incident light I1 'rises from the surface on the pixel 5b forming the latent image 4 to the irregularly reflected light I2' to obtain reflected light I3 '. The raised portion 6b of the pixel 5b that forms the latent image 4 has more irregularly reflected light I2 'than the raised portion 6a of the pixel 5a that forms the background image 3, and the reflected light I3' is reflected. Less reflected light than light I3. For this reason, there is a large difference in the amount of irregularly reflected light between the raised portion 6b of the pixel 5b forming the latent image 4 and the raised portion 6a of the pixel 5a forming the background image 3. Therefore, the brightness of the latent image 4 is visually recognized lower than that of the background area 3. The light reflective layer 1a is provided to enhance the reflected light I3 'and the reflected light I3. If the light reflective layer 1a is formed of a base material without the light reflective layer 1a, the latent image is difficult to visually recognize.

FIG. 3 shows a case where the image forming body A1 is observed with the naked eye tilted gradually from the vertical direction to the horizontal direction under visible light having an incident angle of 45 ° from the X1 or X2 direction as shown in FIG. FIG. However, as shown in FIG. 1A, when the incident light is X1, the observation direction is X2, and when the incident light is X2, the observation direction is X1. When observed from the vertical direction, the amount of reflected light is larger in the raised portion 6a of the pixel 5a forming the background image 3 than in the raised portion 6b of the pixel 5b forming the latent image 4, and the latent image 4 is displayed. The lightness is higher than that of the raised portion 6b of the pixel 5b to be formed, and the latent image is visually recognized as a negative image. When the image is further tilted, the amount of reflected light from the raised portion 6a of the pixel 5a that forms the background image 3 and the amount of reflected light from the raised portion 6b of the pixel 5b that forms the latent image 4 are the same or substantially the same. The image 3 and the latent image 4 are separated and cannot be visually recognized, and only the basic image 2 is visually recognized. When the image is further tilted in the horizontal direction, the amount of reflected light gradually decreases in the raised portions 6a of the pixels 5a forming the background image 3 than in the raised portions 6b of the pixels 5b forming the latent image 4. The brightness is visually recognized lower than the raised portions 6b of the pixels 5b forming the image 4, and the latent image is visually recognized as a positive image. For this reason, the latent image 4 is gradually inverted from the positive image to the negative image when observed with the naked eye while gradually tilting from the vertical direction to the horizontal direction under visible light. However, in the case of observing the image forming body A1 by gradually tilting from the vertical direction to the horizontal direction with the naked eye under visible light having an incident angle of 45 ° from the Y1 or Y2 direction (when the incident light is Y1, the observation direction is Y2 When the incident light is Y2, the observation direction is Y1), the raised portion 6b of the pixel 5b forming the latent image 4 is more diffusely reflected light I2 than the raised portion 6a of the pixel 5a forming the background image 3. 'Is less diffusely reflected light than diffusely reflected light I2 and reflected light I3' is viewed with a larger amount of reflected light than reflected light I3. Therefore, the negative image is gradually inverted from the positive image to the positive image.

(Second example)
FIG. 4 shows an image forming body A2 and its XX ′ sectional view. As shown in FIG. 4 (a), the substrate 1 on which the light-reflective layer 1a and the light-transmissive layer 1b are laminated, the surface of the light-transmissive layer has an X direction at an interval of a pitch P1, and a Y direction is a pitch. A basic image 2 is formed by pixels 5 arranged at intervals of P2, and the basic image is divided into a background image (first region) 3 and a latent image (second region) 4. The edge portion of the pixel 5 is formed of a raised portion 6 that is deeper than the surface of the light transmissive layer 1b. The pixel 5a that forms the background image and the pixel 5b that forms the latent image have different sizes. The pixel 5a that forms the background image has a raised portion 6a, and the pixel 5b that forms the latent image has a raised portion 6b. The interval between the pitches P1 in the X direction and the interval between the pitches P2 in the Y direction may be the same or different. The pixel 5a that forms the background image and the pixel 5b that forms the latent image have different sizes. In the drawing, the pixel 5a and the pixel 5a are circular, but the shape of the pixel is not particularly limited. Further, the pixel 5b that forms the latent image has a larger diameter than the pixel 5a that forms the background image, but the pixel 5a that forms the background image than the pixel 5b that forms the latent image. May have a larger diameter. However, it is desirable that the relationship between the diameter of the pixel 5a forming the background image and the diameter of the pixel 5b forming the latent image is within a range of 1/2 or 2 times. The interval between the pitches P1 in the X direction and the interval between the pitches P2 in the Y direction may be the same or different. As shown in the XX ′ sectional view of the image forming body A2 in FIG. 4B, the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image is the same. However, the present invention is not limited to this, and the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image may be different.

(Third example)
FIG. 5 shows an image forming body A3 and its XX ′ sectional view. As shown in FIG. 5 (a), the substrate 1 on which the light-reflective layer 1a and the light-transmissive layer 1b are laminated, the surface of the light-transmissive layer has an X direction at an interval of pitch P1, and a Y direction is a pitch A basic image 2 is formed by pixels 5 arranged at intervals of P2, and the basic image is divided into a background image (first region) 3 and a latent image (second region) 4. The edge portion of the pixel 5 is formed of a raised portion 6 that is deeper than the surface of the light transmissive layer 1b. The pixel 5a that forms the background image and the pixel 5b that forms the latent image differ in the arrangement angle. That is, the pixel 5a that forms the background image and the pixel 5b that forms the latent image have the same shape and have different arrangement angles. In the drawing, the pixel 5a and the pixel 5a are elliptical. In addition, the angle at which the pixel 5b forming the latent image is arranged to be 90 degrees with respect to the angle at which the pixel 5a forming the background image is arranged is 0 degree. However, the present invention is limited to this. Without being limited, the arrangement angle may be other than 180 degrees. That is, it is only necessary to have anisotropy. Further, the interval between the pitches P1 in the X direction and the interval between the pitches P2 in the Y direction may be the same or different. The pixel 5a that forms the background image has a raised portion 6a, and the pixel 5b that forms the latent image has a raised portion 6b. Therefore, the shape of the pixel in this case must be a shape other than a square, regular hexagon, regular octagon, or circle, that is, an elliptical shape, a rectangular shape, or the like that has different lengths depending on the vertical diameter and the horizontal diameter. There is. As shown in the XX ′ sectional view of the image forming body A3 in FIG. 5B, the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image is the same. However, the present invention is not limited to this, and the depth of the pixel 5a forming the background image and the pixel 5b forming the latent image may be different.

The second example is a case where the image forming body A2 is observed by gradual tilting from the vertical direction to the horizontal direction with the naked eye under visible light having an incident angle of 45 ° from the X1, X2, Y1, or Y2 direction. When X1, the observation direction is X2, when the incident light is X2, the observation direction is X1, when the incident light is Y1, the observation direction is Y2, and when the incident light is Y2, the observation direction is Y1. The image is gradually inverted from the positive image to the negative image. The third example is a case where the image forming body A3 is observed by being tilted gradually 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 (when the incident light is X1, The observation direction is X2, and when the incident light is X2, the observation direction is X1). From the positive image to the negative image is gradually reversed. Further, the third example is a case where the image forming body A3 is observed by gradually tilting from the vertical direction to the horizontal direction with the naked eye under visible light having an incident angle of 45 ° from the Y1 or Y2 direction (incident light is Y1). When the incident direction is Y2 and the incident light is Y2, the observation direction is Y1), the negative image is gradually inverted from the positive image continuously.

(Fourth example)
FIG. 6 shows an image forming body A4 and its XX ′ sectional view. As shown in FIG. 6 (a), on the base material 1 on which the light reflective layer 1a and the light transmissive layer 1b are laminated, the X direction on the surface of the light transmissive layer is the pitch P1, and the Y direction is the pitch. A basic image 2 is formed by pixels 5 arranged at intervals of P2, and the basic image is a background image (first region) 3, a first latent image (second region) 4a, and a second latent image. (Third region) Divided into 4b, the pixel 5 is formed in a concave shape having a specific depth, and the edge portion of the pixel 5 is composed of a raised portion 6 raised from the surface of the light transmissive layer 1b. The pixel 5a that forms the background image is different in shape from the pixel 5b1 that forms the first latent image 4a and the pixel 5b2 that forms the second latent image 4b, and the first latent image 4a The pixel 5b1 to be formed has a different angle from the pixel 5b2 that forms the second latent image 4b. That is, the pixel 5b1 that forms the first latent image 4a and the pixel 5b2 that forms the second latent image 4b have the same shape and different arrangement angles. In FIG. 6, the pixel 5a has a circular shape, and the pixels 5b1 and 5b2 have an elliptical shape. The shape of the pixel is not limited. The pixel 5b2 forming the second latent image 4b has an angle of 90 degrees with respect to the angle 0 degrees where the pixel 5b1 forming the first latent image 4a is arranged. The present invention is not limited to this, and any angle other than 180 degrees may be used. That is, it is only necessary to have anisotropy. As shown in the XX ′ cross-sectional view of the image forming body A4 in FIG. 6B, the pixel 5a that forms the background image, the pixel 5b1 that forms the first latent image 4a, and the second latent image 4b. The depths of the pixels 5b2 forming the same are the same. However, the present invention is not limited to this, and the depth of the pixel 5a forming the background image, the pixel 5b1 forming the first latent image 4a, and the pixel 5b2 forming the second latent image 4b are different. It may be.

FIG. 7A is a diagram when the image forming body A4 is observed from the vertical direction with the naked eye under visible light having an incident angle of 45 ° from the X1 or X2 direction. A part of the incident light I1 is irregularly reflected I2 on the raised portion 6a raised from the surface of the pixel 5a forming the background image 3, and the reflected light I3 is obtained. A part of the incident light I1 'rises from the surface on the pixel 5b1 forming the first latent image 4a, and the reflected light I3' is obtained. A part of the incident light I1 ″ raised from the surface on the pixel 5b2 forming the second latent image 4b is irregularly reflected light I2 ″, and the reflected light I3 ″ is obtained. In the raised portion 6b1 of the pixel 5b1 forming the image image 4a, the irregularly reflected light I2 'has a larger amount of irregularly reflected light than the irregularly reflected light I2, and the reflected light I3' is reflected light. Therefore, there is a large difference in the amount of irregularly reflected light between the raised portion 6b1 of the pixel 5b1 forming the first latent image 4a and the raised portion 6a of the pixel 5a forming the background image 3. The first latent image 4a is viewed with lower brightness than the background area 3. The raised portion 6b2 of the pixel 5b2 forming the second latent image 4b is raised of the pixel 5a forming the background image 3. From part 6a, irregularly reflected light I2 "is more irregular than irregularly reflected light I2. The amount of reflected light I3 ″ is less than the amount of reflected light I3. Therefore, the raised portion 6b2 of the pixel 5b2 that forms the second latent image 4b and the raised portion 6a of the pixel 5a that forms the background image 3 are reflected. Thus, a large difference occurs in the amount of irregularly reflected light, so that the brightness on the second latent image 4b is lower than that on the background area 3.

FIG. 8 shows a case where the image forming body A4 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 as shown in FIG. 7B. FIG. However, as shown in FIG. 6A, when the incident light is X1, the observation direction is X2, and when the incident light is X2, the observation direction is X1. When observed from the vertical direction, the amount of reflected light is larger at the raised portion 6a of the pixel 5a forming the background image 3 than at the raised portion 6b1 of the pixel 5b1 forming the first latent image 4a. The latent image 4a forming the latent image 4a is viewed with higher brightness than the raised portion 6b1 of the pixel 5b1, and the first latent image 4a is viewed as a negative image. Further, in the raised portion 6a of the pixel 5a that forms the background image 3, the amount of reflected light gradually decreases from the raised portion 6b2 of the pixel 5b2 that forms the second latent image 4b, and the second latent image image. The brightness is visually recognized lower than that of the raised portion 6b2 of the pixel 5b2 forming 4b, and the second latent image 4b is visually recognized as a positive image. When further tilted and observed, the amount of reflected light from the raised portions 6a of the pixels 5a forming the background image 3, the amount of reflected light from the raised portions 6b1 of the pixels 5b1 forming the first latent image 4a, and the second latent The amount of reflected light from the raised portions 6b2 of the pixels 5b2 forming the image image 4b is the same or substantially the same, and the background image 3, the first latent image 4a, and the second latent image 4b are separated and cannot be visually recognized. Thus, only the basic image 2 is visually recognized. Further, when observed by tilting in the horizontal direction, the amount of reflected light is gradually reduced in the raised portion 6a of the pixel 5a forming the background image 3 than in the raised portion 6b1 of the pixel 5b1 forming the first latent image 4a. Thus, the brightness is visually recognized lower than the raised portion 6b1 of the pixel 5b1 forming the first latent image 4a, and the first latent image 4a is visually recognized as a positive image. Further, in the raised portion 6a of the pixel 5a that forms the background image 3, the amount of reflected light gradually increases from the raised portion 6b2 of the pixel 5b2 that forms the second latent image 4b, and the second latent image image. The brightness is higher than that of the raised portion 6b2 of the pixel 5b2 forming 4b, and the second latent image 4b is viewed as a negative image. For this reason, the first latent image 4a is gradually inverted from the positive image to the negative image when observed with the naked eye while being tilted gradually from the vertical direction to the horizontal direction under visible light. The second latent image 4b is gradually inverted from the negative image to the positive image. However, when the image forming body A4 is observed with the naked eye tilted gradually from the vertical direction to the horizontal direction under visible light having an incident angle of 45 ° from the Y1 or Y2 direction (when the incident light is Y1, the observation direction is Y2 And when the incident light is Y2, the observation direction is Y1), the raised portion 6b1 of the pixel 5b1 that forms the first latent image 4a is more than the raised portion 6a of the pixel 5a that forms the background image 3. Since the irregularly reflected light I2 ′ has a smaller amount of diffusely reflected light than the irregularly reflected light I2, and the reflected light I3 ′ has a larger amount of reflected light than the reflected light I3, the negative image is gradually inverted from the positive image continuously. Further, the raised portion 6b2 of the pixel 5b2 that forms the second latent image 4a has a larger amount of irregularly reflected light I2 'than the raised portion 6a of the pixel 5a that forms the background image 3, and the reflected light amount is larger than that of the irregularly reflected light I2. Since the light I3 ′ is viewed with a larger amount of reflected light than the reflected light I3, the light I3 ′ is gradually reversed from the positive image to the negative image.

The pixels forming the image forming bodies A1 to A4 have a concave shape having a specific depth, but the pixels forming the image forming body of the present invention are a substrate on which a light reflective layer and a light transmissive layer are laminated. It may be a through-hole penetrating through. Further, as described above, the pixels forming the background image and the pixels forming the latent image need to have different pixel shapes, pixel sizes, or pixel angles.

  The depth of pixels forming a background image, the depth of pixels forming a latent image, the depth of pixels forming a first latent image, and the depth of pixels forming a second latent image of the image forming body of the present invention The depth varies depending on the thickness of the base material on which the light reflective layer and the light transmissive layer are laminated, but is preferably about 50 μm to 300 μm. Further, the width of the pixels forming the background image, the width of the pixels forming the latent image, the width of the pixels forming the first latent image, and the second latent image are formed. The width of the pixel is preferably about 50 μm to 500 μm. These pixels can be formed by a laser processing machine, and a raised portion that is raised from the surface of the light transmitting layer is formed at the edge portion of the pixel by the heat of the laser. The height of the raised portion may be formed to be about 10 μm or higher from the substrate surface. The shape of the pixel point is not particularly limited, and can be formed by at least one of a circular, polygonal, and specially shaped groove. By using a polygonal or specially shaped groove, the anti-counterfeiting effect is improved because it becomes difficult to duplicate.

The light-reflective layer of the base material on which the light-reflective layer and the light-transmissive layer are laminated can be a metal foil with high surface reflectivity such as aluminum foil, gold foil, silver foil, etc. Metal deposition may be performed on the back surface of the conductive substrate. Further, forgery prevention can be improved by using a hologram.

The light-transmitting layer of the substrate on which the light-reflecting layer and the light-transmitting layer are laminated is preferably a transparent substrate. However, any substrate that can transmit light may be used, and a translucent substrate having a color may also be used. Can be used. For example, polyethylene, polypropylene, polyester, nylon polyurethane, polyvinyl chloride, polyvinyl acetate, polyacryl, or the like is used as the material.

The thickness of the base material on which the light-reflective layer and the light-transmitting layer are laminated is not particularly limited, and is effective from a thin base material of about 60 μm to a card base material of about 760 μm. In addition, an adhesive layer is provided on the back surface of the base material so that it can be attached to valuables. When an image forming body attached to a valuable item is to be peeled off, the groove-like point group and groove-like line group are destroyed and cannot be reused illegally.

  Since the basic image, background image, and latent image of the present invention are at least one of letters, numbers, symbols, and patterns, authenticity can be easily determined when observed from a specific direction.

  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)
Aluminum was vapor-deposited on the back surface of a polyethylene substrate having a thickness of about 180 μm to obtain a substrate having a light-reflective layer composed of a polyethylene substrate and a light-transmissive layer deposited with aluminum. The latent image (letter T) is a laser processing machine at a regular interval with a pitch of about 200 μm and concave pixels with a diameter of about 100 μm, a width of about 60 μm, and a depth of about 150 μm on the surface of a polyethylene substrate that is not vapor-deposited with aluminum. A pixel group was formed, and a protruding portion that protruded from the surface of the light-transmitting layer was formed at the edge portion of the pixel by the heat of the laser. The background image portion in the peripheral area of the latent image (character P) is a circular pixel having a diameter of about 100 μm and a depth of about 150 μm. As a result of the heat, a raised portion was formed at the edge portion of the pixel, which was raised from the surface of the light transmissive layer. The pixel shape of the latent image is elliptical, the pixel shape of the background image is circular, and the pixel shapes are different from each other. A basic image was formed from the latent image and the background image to produce an image forming body B1. When the image forming body B1 shown in FIG. 9 is observed from the X1 direction or the X2 direction under the visible light while being gradually tilted from the vertical direction to the horizontal direction with the naked eye, the latent image (character T) is changed from the positive image to the negative image. It was possible to observe by inverting gradually. When the image forming body B1 shown in FIG. 9 is observed from the Y1 direction or the Y2 direction under the visible light while being gradually tilted from the vertical direction to the horizontal direction with the naked eye, the latent image (character T) is positive from the negative image. It was possible to observe by inverting the image gradually and gradually.

(Example 2)
Aluminum was vapor-deposited on the back surface of a polyethylene substrate having a thickness of about 180 μm to obtain a substrate having a light-reflective layer composed of a polyethylene substrate and a light-transmissive layer deposited with aluminum. The latent image (letter T) is a group of pixels formed by a laser processing machine at regular intervals with a pitch of about 200 μm on a concave pixel with a diameter of about 150 μm and a depth of about 150 μm on the surface of a polyethylene substrate that is not vapor-deposited with aluminum. However, a raised portion that was raised from the surface of the light-transmitting layer was formed at the edge portion of the pixel by the heat of the laser. The background image portion in the peripheral area of the latent image (letter T) forms a pixel group by a laser processing machine at a constant interval of about 200 μm in pitch with concave pixels having a circular diameter of about 100 μm and a depth of about 150 μm. As a result of the heat, a raised portion was formed at the edge portion of the pixel, which was raised from the surface of the light transmissive layer. The diameter of the circular pixel in the latent image is about 150 μm in diameter, and the diameter of the circular pixel in the background image is about 100 μm in diameter, and the sizes of the pixels are different from each other. A basic image was formed from the latent image and the background image to produce an image forming body B2. When the image forming body B2 shown in FIG. 10 is observed from the X1 direction or the X2 direction under the visible light with the naked eye tilted gradually from the vertical direction to the horizontal direction, the latent image (character T) is negative from the positive image. It was possible to observe by inverting the image gradually and gradually. When the image forming body B2 shown in FIG. 10 is observed from the Y1 direction or the Y2 direction while being tilted gradually from the vertical direction to the horizontal direction with the naked eye under visible light, the latent image (character T) is changed from the negative image to the positive image. It was possible to observe by inverting gradually.

(Example 3)
Aluminum was vapor-deposited on the back surface of a polyethylene substrate having a thickness of about 180 μm to obtain a substrate having a light-reflective layer composed of a polyethylene substrate and a light-transmissive layer deposited with aluminum. The latent image (letter T) is a laser processing machine at a regular interval with a pitch of about 200 μm and concave pixels with a diameter of about 100 μm, a width of about 60 μm, and a depth of about 150 μm on the surface of a polyethylene substrate that is not vapor-deposited with aluminum. A pixel group was formed, and a protruding portion that protruded from the surface of the light-transmitting layer was formed at the edge portion of the pixel by the heat of the laser. When the background image portion of the peripheral area of the latent image (character T) is a pixel having the same shape as the pixel formed by the latent image and the angle at which the pixel forming the latent image is arranged is 0 degree, A pixel group was formed by a laser processing machine at a constant interval by rotating 45 degrees, and a raised portion that protruded from the surface of the light transmitting layer was formed at the edge portion of the pixel by the heat of the laser. The angle at which the pixels of the latent image are arranged is 0 degree, the angle at which the pixels of the background image are arranged is 45 degrees, and the angles at which the pixels are arranged are different from each other. A basic image was formed from the latent image and the background image to produce an image forming body B3. When the image forming body B3 shown in FIG. 11 is observed by tilting from the vertical direction to the horizontal direction with the naked eye under visible light from the X1 direction or the X2 direction, the latent image (character T) is changed from a positive image to a negative image. It was possible to observe by inverting gradually. When the image forming body B3 shown in FIG. 11 is observed by tilting from the vertical direction to the horizontal direction with the naked eye under the visible light from the Y1 direction or the Y2 direction, the latent image (character T) is a negative image to a positive image. It was possible to observe by inverting gradually.

(Example 4)
Aluminum was vapor-deposited on the back surface of a polyethylene substrate having a thickness of about 180 μm to obtain a substrate having a light-reflective layer composed of a polyethylene substrate and a light-transmissive layer deposited with aluminum. The first latent image (letter T) is a laser with an elliptical diameter of about 100 μm, a width of about 60 μm and a depth of about 150 μm on a surface of a polyethylene substrate that has not been vapor-deposited aluminum at a regular pitch of about 200 μm. A pixel group was formed by a processing machine, and a raised portion that protruded from the surface of the light transmissive layer was formed at the edge portion of the pixel by the heat of the laser. The second latent image (character L) is 45 pixels when the pixel having the same shape as the pixel formed by the first latent image is set to 0 degree as the angle at which the pixels forming the latent image are arranged. A pixel group was formed by a laser processing machine at a constant interval while rotating the degree, and a raised portion that protruded from the surface of the light transmissive layer was formed at the edge portion of the pixel by the heat of the laser. The angle at which the pixels of the first latent image are arranged is 0 degree, the angle at which the pixels of the second latent image are arranged is 45 degrees, and the angles at which the pixels are arranged are different from each other. The background image portion in the peripheral area of the first latent image (character T) and the second latent image (character L) has a circular pixel with a diameter of about 100 μm and a depth of about 150 μm, and a constant pitch of about 200 μm. A group of pixels was formed by a laser processing machine at intervals, and a protruding portion that protruded from the surface of the light transmissive layer was formed at the edge portion of the pixel by the heat of the laser. The pixel shape of the first latent image (character P) and the second latent image (character L) latent image is an elliptical shape, the pixel shape of the background image is a circular shape, and the pixel shape is mutually Is different. A basic image was formed from the first latent image, the second latent image, and the background image, and an image forming body B4 was produced. When the image forming body B4 shown in FIG. 12 is observed from the X1 direction or the X2 direction while being tilted gradually from the vertical direction to the horizontal direction with the naked eye under visible light, the first latent image (character T is a positive image). The second latent image (the character L could be observed by gradually reversing from the negative image to the positive image). Image forming body B4 shown in FIG. The first latent image (letter T) is continuously from the negative image to the positive image when the image is observed from the Y1 direction or the Y2 direction under the visible light with the naked eye tilted gradually from the vertical direction to the horizontal direction. The second latent image (character L) could be observed while being gradually inverted from the positive image to the negative image.

FIG. 1 is a view showing the image forming body A1 and its X-X ′ sectional view. FIG. 2 is a diagram when the image forming body A1 is observed from the vertical direction with the naked eye under visible light having an incident angle of 45 ° from the X1 or X2 direction. FIG. 3 shows a case where the image forming body A1 is observed with the naked eye tilted gradually from the vertical direction to the horizontal direction under visible light having an incident angle of 45 ° from the X1 or X2 direction as shown in FIG. FIG. FIG. 4 is a view showing the image forming body A2 and its X-X ′ sectional view. FIG. 5 is a diagram showing the image forming body A3 and its X-X ′ sectional view. FIG. 6 is a view showing the image forming body A4 and its X-X ′ cross-sectional view. FIG. 7 is a diagram when the image forming body A4 is observed from the vertical direction with the naked eye under visible light having an incident angle of 45 ° from the X1 or X2 direction. FIG. 8 shows a case where the image forming body A4 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 as shown in FIG. 7B. FIG. It is a figure which shows image forming body B1. It is a figure which shows image forming body B2. It is a figure which shows image forming body B3. It is a figure which shows image forming body B4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 1a Light reflective layer 1b Light transmissive layer 2 Basic image 3 Background image (1st area | region)
4 Latent image (second area)
4a First latent image (second region)
4b Second latent image (third region)
5a Pixel 5a forming a background image
5b Pixel 5b for forming a latent image
5b1 Pixels forming the first latent image 4a 5b2 Pixels forming the second latent image 4b 6, 6a, 6b, 6b1, 6b2 Raised portions A1, A2, A3, A4, B1, B2, B3, B4 Image forming member F Depth H Thickness I1, I1 ', I1 "Incident light I2, I2', I2" Diffuse reflection I3, I3 ', I3 "Reflected light

Claims (1)

A basic image is formed on a substrate on which a light-reflective layer and a light-transmitting layer are laminated, by pixels arranged at specific intervals on the surface of the light-transmitting layer, and the basic image includes a first region and a second region. Divided into areas,
The pixel is a concave shape or a through-hole having a specific depth, and the edge portion of the pixel is formed with a raised portion that is raised from the surface of the light transmissive layer,
An image forming body in which a pixel forming the first region and a pixel forming the second region have different shapes, sizes, or pixel angles.

Images