JP2005165175A - 3-dimensional image display method, 3-dimensional image display material, and forgery-proof layered product, forgery-proof card and forgery-proof printed matter using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a 3-dimensional image display method by which a 3-dimensional image excellent in luminance and 3-dimensional effect can be easily and inexpensively created, a 3-dimensional image display material, and a forgery-proof layered product, a forgery-proof card and a forgery-proof printed matter using the same. <P>SOLUTION: The 3-dimensional image display method is configured by a combination of a pinhole array comprising a group of pinholes different in lengths of major side length and minor side length with an image for 3-dimensional display created from data image-processed for 3-dimensional display. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a novel stereoscopic image display method, and more specifically, a stereoscopic image display method, a stereoscopic image display material, and a forgery / alteration-preventing laminate using the same, which can provide a stereoscopic image excellent in luminance and stereoscopic effect easily and inexpensively. The invention relates to a forgery / alteration card and a falsification prevention printed matter.

  Various methods for stereoscopic display have been researched and developed in the past, and as a stereoscopic image display method, not only when the viewer's viewpoint moves in the horizontal direction, but also when it moves in the vertical direction, It is known that it is necessary to use an integral photography method, or a light reproduction method that is technically related to it. This integral photography requires a special lens called a fly-eye lens with a structure resembling an insect compound eye, but its production requires high-precision technology and is difficult to obtain. is there.

  Therefore, instead of using the fly-eye lens described above, by using a pinhole array created by printing on a transparent OHP sheet with an ink jet printer, using only easily available equipment such as an ink jet printer or a personal computer, integral photography is possible. It has been proposed to perform three-dimensional display of a method (for example, see Non-Patent Document 1).

  A simple 3D display system in which this integral photography fly-eye lens is replaced with an ink-jet pinhole array sandwiches a transparent thin plate between two transparent OHP sheets printed with a PC-made pattern. When illuminated, a stereoscopic image can be observed from the front. As a method of creating stereoscopic data, a method of ray tracing using a computer program and a method of controlling the position of a viewpoint using existing CG software (POV-Ray) have been proposed.

  One specific proposal is to sandwich a transparent plate with a thickness of about 1 mm between two OHP sheets. The upper OHP sheet has a pinhole array, and the lower OHP sheet has an original 3D image. Each pattern is printed, and when viewed from above by illuminating with backlight from the bottom, stereoscopic viewing is possible.

  The principle of this method is similar to ray tracing used in pinhole cameras and computer graphics. The light emitted from the lower OHP sheet passes through the hole (pinhole) in the upper OHP sheet and reaches the viewpoint. The viewer feels as if the light is coming from an object that exists in a three-dimensional space and can be viewed stereoscopically.

  In this method, a method of creating a pattern to be printed on the OHP sheet is technically important. The upper OHP sheet is a pinhole array based on an ink jet method, but this is a very regular pattern. Although it can be produced easily, it has a drawback of being inferior in three-dimensionality and sharpness.

  Furthermore, the present inventors have made it possible to obtain a stereoscopic image easily and inexpensively by using a stereoscopic display image created by using a silver halide photographic light-sensitive material, an optical recording material or a thermosensitive recording material and a stereoscopic display using a pinhole array. The method has been intensively studied and proposed, but as a result of subsequent studies, it has been found that it is difficult to satisfy the pinhole aperture ratio and the stereoscopic effect, that is, the luminance and the stereoscopic effect at the same time, based on the principle of stereoscopic display. did.

In addition, with the increasing importance of information security and physical security in recent years, the need for anti-counterfeiting technology is increasing. For example, hologram technology has been put to practical use as identification cards for ID cards, etc., but because this hologram technology is expensive to manufacture and inferior in design, development of anti-counterfeit technology that is inexpensive and excellent in design Is desired.
3D video display by light beam reproduction method, 3D Image Conference 2001, p173-176

  The present invention has been made in view of the above problems, and its object is to provide a stereoscopic image display method, a stereoscopic image display material, and a fake alteration using the same, which can easily and inexpensively create a stereoscopic image excellent in luminance and stereoscopic effect. It is providing a prevention laminated body, a falsification prevention card, and a falsification prevention printed matter.

The above object of the present invention is achieved by the following configurations.
(Claim 1)
It is composed of a combination of a pinhole array having a pinhole group having a long side length and a short side length different from each other and a stereoscopic display image created from data subjected to image processing for stereoscopic display. 3D image display method.
(Claim 2)
It is composed of a combination of a pinhole array having a pinhole group arrangement in which the vertical pitch (pinpole gap) and the horizontal pitch are different, and a stereoscopic display image created from data processed for stereoscopic display. A stereoscopic image display method.
(Claim 3)
2. The stereoscopic image display according to claim 1, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. Method.
(Claim 4)
3. The stereoscopic image display according to claim 2, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. Method.
(Claim 5)
The stereoscopic image display method according to claim 1, wherein the pinhole array and the stereoscopic display image are provided opposite to each other on different surfaces of the same support.
(Claim 6)
The stereoscopic image display method according to claim 2, wherein the pinhole array and the stereoscopic display image are provided opposite to each other on different surfaces of the same support.
(Claim 7)
The stereoscopic image display method according to claim 1, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources.
(Claim 8)
3. The stereoscopic image display method according to claim 2, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources.
(Claim 9)
It is composed of a combination of a pinhole array having a pinhole group having a long side length and a short side length different from each other and a stereoscopic display image created from data subjected to image processing for stereoscopic display. 3D image display material.
(Claim 10)
It is composed of a combination of a pinhole array having a pinhole group arrangement in which the vertical pitch (pinpole gap) and the horizontal pitch are different, and a stereoscopic display image created from data processed for stereoscopic display. A stereoscopic image display material.
(Claim 11)
The three-dimensional image display according to claim 9, wherein the pinhole array or the three-dimensional display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a heat-sensitive recording material. material.
(Claim 12)
The stereoscopic image display according to claim 10, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. material.
(Claim 13)
The stereoscopic image display material according to claim 9, wherein the pinhole array and the stereoscopic display image are provided so as to face each other on different surfaces of the same support.
(Claim 14)
The stereoscopic image display material according to claim 10, wherein the pinhole array and the stereoscopic display image are provided to face each other on different surfaces of the same support.
(Claim 15)
The stereoscopic image display material according to claim 9, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources.
(Claim 16)
The stereoscopic image display material according to claim 10, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources.
(Claim 17)
A three-dimensional image display method according to any one of claims 1 to 8, wherein the forgery / alteration-prevention laminate is characterized.
(Claim 18)
The three-dimensional image display material of any one of Claims 9-16 is used, The forgery and alteration prevention laminated body characterized by the above-mentioned.
(Claim 19)
A forgery / alteration prevention card using the stereoscopic image display method according to claim 1.
(Claim 20)
A forgery and alteration prevention card using the stereoscopic image display material according to any one of claims 9 to 16.
(Claim 21)
A three-dimensional image display method according to any one of claims 1 to 8, wherein the forgery / alteration-prevented printed matter.
(Claim 22)
A three-dimensional image display material according to any one of claims 9 to 16, wherein the falsification-preventing printed matter.

  According to the present invention, a stereoscopic image display method capable of easily and inexpensively creating a stereoscopic image excellent in luminance and stereoscopic effect, a stereoscopic image display material, a forgery / alteration prevention laminate using the same, a forgery / alteration prevention card, and a falsification prevention Printed materials can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described in detail, but the present invention is not limited thereto.

  As a result of intensive studies in view of the above problems, the present inventors have, as a first method, a pinhole array having a pinhole group having a long side length and a short side length different from each other, and an image for stereoscopic display. It has been found that a stereoscopic image display method composed of a combination with a stereoscopic display image created from processed data can easily and inexpensively create a stereoscopic image with high brightness without impairing the stereoscopic effect. It is up to. In particular, it is preferable to lengthen the long side length in a direction different from the direction in which the amount of movement of the viewpoint when actually observing is large. As a second method, a pinhole array having a pinhole group arrangement in which the vertical pitch (pinpole gap) and the horizontal pitch are different from each other, and a stereoscopic display image created from data processed for stereoscopic display. As a result of the present invention, it has been found that a stereoscopic image display method constituted by a combination can easily and inexpensively create a stereoscopic image with high brightness without impairing the stereoscopic effect. In particular, it is preferable to shorten the pitch in the direction in which the amount of movement of the viewpoint when actually observing is large.

  Details of the present invention will be described below.

  In the stereoscopic image display method of the present invention, a stereoscopic image is displayed by combining a pinhole array having a pinhole group and a stereoscopic display image.

  In the stereoscopic image display method of the present invention, the pinhole array and the stereoscopic display image are individually formed on the same transparent support (in this case, the transparent support may contain a coloring substance). Alternatively, the images may be provided opposite to each other on the front and back surfaces on the same transparent support. In the former case, it is necessary to laminate the two images when observing the stereoscopic image. In this case, it is preferable to stack the support members without the pinhole array / stereoscopic display image so that the distance between the two images is increased. . On the other hand, in the latter case, for the purpose of separating the distance between them, the thickness of the transparent support is such that the ratio of the thickness of the transparent support to the pinhole gap is 0.5: 10, particularly 2: 5. preferable.

  The transparent support that can be used in the present invention is not particularly limited, and examples thereof include polyester resins, diacetate resins, triatesate resins, acrylic resins, polycarbonate resins, polyvinyl chloride resins, and polyimide resins. And films made of materials such as cellophane and celluloid.

  First, details of the pinhole array according to the present invention will be described.

  In the present invention, the pinhole array and the stereoscopic display image can be formed using a known image forming method including an ink jet recording method, and among them, a silver halide photographic light-sensitive material having a transparent support. It is preferable to form a pinhole array and a stereoscopic display image using an optical recording material or a heat-sensitive recording material.

  Next, the pinhole array constituting the pinhole array will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an example of a pinhole arrangement constituting a conventionally used pinhole array.

  In FIG. 1, a pinhole array 1 has a square pinhole 2 having a long side length A and a short side length B of the same length (A = B) on a transparent support. ) And the horizontal pitch b are arranged at equal intervals (a = b). When such a pinhole array in which square pinholes are arranged at equal intervals in the vertical and horizontal directions is used, sufficient luminance cannot be obtained. I couldn't.

  On the other hand, in the pinhole array according to the present invention, it is possible to use a pinhole whose pinside shape is different from a long side length and a short side length other than a square, or even a square pinhole, By using a pinhole group arrangement in which the horizontal pitch (pin pole gap) and the vertical pitch are different, both brightness and high stereoscopic effect are achieved.

  FIG. 2 is a schematic diagram showing an example of a pinhole array composed of pinhole groups having different long side lengths and short side lengths according to the present invention.

  2A, the pinhole 2 constituting the pinhole array 1 is formed of a rectangle (A ≠ B) as an example of a shape having a long side length A and a short side length B different from each other. In addition, in FIG. 2 a), as the rectangular arrangement, an arrangement of intervals (a ≠ b) in which the vertical pitch a (pin pole gap) and the horizontal pitch b are different is illustrated, but this interval is the same ( a = b).

  Further, even if rectangles (A ≠ B) having different long side length A and short side length B are arranged on the same line in the horizontal direction as shown in FIG. 2a, or shown in FIG. 2b). As such, they may be arranged at different positions in the lateral direction. In the above description, an example of a pattern having a different arrangement in the horizontal direction is shown, but of course, the same pattern change as described above may be performed in the vertical direction.

  FIG. 3 is a schematic diagram showing an example of a pinhole array having a pinhole group arrangement in which the vertical pitch and the horizontal pitch are different according to the present invention.

  3A, the pinhole array 1 is different from a pinhole 2 having a square (A = B) in which the long side length A and the short side length B are equal to each other in the vertical pitch a (pin pole gap) and the horizontal pitch b. They are arranged at intervals (a ≠ b). Further, squares having the same long side length A and short side length B (A = B) may be arranged on the same line in the horizontal direction as shown in FIG. 3A, or as shown in FIG. 3B. As such, they may be arranged at different positions in the lateral direction. In the above description, an example of a pattern in which square pinholes have different arrangements in the horizontal direction has been shown. Of course, pattern changes similar to the above may be performed in the vertical direction, and the pinhole shape may be long. A pinhole in which the side length A and the short side length B are different (A ≠ B) may be used.

  In the pinhole array according to the present invention, the shape of the pinhole is preferably a lattice shape, for example, configured by 240 units × 240 units, and further, one unit has a configuration of 64 pixels × 64 pixels. The aperture ratio is adjusted by the size of the unexposed transparent pixel area in 64 pixels per unit, and an aperture ratio that secures a transparent pixel area of 22 pixels × 22 pixels (total area of the pinhole portion with respect to the total area) Can be a pinhole array with 11.8% and a maximum density of 2.5.

  The maximum density here refers to the maximum value of the visual density measured in the black region with a transmission type densitometer (for example, a densitometer type 310 manufactured by X-rite) using a status M filter.

  The above is a representative example of the pinhole array, the pinhole aperture ratio is preferably 2 to 15%, particularly preferably 2 to 10%, and the maximum concentration is 2.5 or more, particularly 3.0 or more. preferable.

  The stereoscopic display image according to the present invention is created from data obtained by performing image processing for stereoscopic display using each image recording material described later. As a method for creating a stereoscopic display image, for example, a ray tracing method using a specific computer program may be used, but a known technique such as a method using an existing CG application called POV-Ray can be employed.

  Next, various image recording materials used for creating the pinhole array and stereoscopic display image according to the present invention will be described.

  In the stereoscopic image display method of the present invention, it is preferable to use a silver halide photographic light-sensitive material as one of image recording materials used for producing a pinhole array or a stereoscopic display image.

  As the silver halide light-sensitive material according to the present invention, a silver halide color light-sensitive material having a known transparent support can be used. Among them, a silver halide color photographic light-sensitive material is preferably used.

  The silver halide color light-sensitive material according to the present invention is any known material as long as it has at least three types of light-sensitive layers having different spectral wavelength regions on a light-transmitting transparent support. Also good.

  The silver halide color photographic light-sensitive material preferably used in the present invention will be further described below.

  The composition of the silver halide emulsion that can be used in the silver halide color light-sensitive material according to the present invention is as follows: silver chloride, silver bromide, silver chlorobromide, silver iodobromide, silver chloroiodobromide, silver chloroiodide However, it is preferable to use silver chlorobromide containing 95 mol% or more of silver chloride and substantially free of silver iodide. From the viewpoint, it is a silver halide emulsion containing 97 mol% or more, more preferably 98 to 99.9 mol% of silver chloride.

  In order to obtain the silver halide emulsion used in the present invention, a silver halide emulsion having a portion containing silver bromide at a high concentration is particularly preferably used. In this case, the portion containing silver bromide at a high concentration may be epitaxially bonded to the silver halide emulsion grains, or may be a so-called core / shell type silver halide emulsion, or a complete layer may be formed. Instead, there may simply be a region having a partially different composition. Further, the composition may change continuously or discontinuously. The portion where silver bromide is present at a high concentration is particularly preferably the apex of the crystal grain on the surface of the silver halide grain.

  In order to obtain the silver halide emulsion used in the present invention, it is advantageous to contain heavy metal ions. Heavy metal ions that can be used for such purposes include Group VIII metals such as iron, iridium, platinum, palladium, nickel, rhodium, osmium, ruthenium and cobalt, and Group IIB transitions such as cadmium, zinc and mercury. Examples include metals and ions of lead, rhenium, molybdenum, tungsten, gallium, and chromium. Of these, metal ions of iron, iridium, platinum, ruthenium, gallium and osmium are preferable. These metal ions can be added to the silver halide emulsion in the form of a salt or a complex salt.

  When the heavy metal ion forms a complex, the ligand or ion includes cyanide ion, thiocyanate ion, isothiocyanate ion, cyanate ion, chloride ion, bromide ion, iodide ion, nitrate ion, Examples include carbonyl and ammonium. Of these, cyanide ion, thiocyanate ion, isothiocyanate ion, chloride ion, bromide ion and the like are preferable.

  In order to contain heavy metal ions in the silver halide emulsion used in the present invention, the heavy metal compound is added before the formation of silver halide grains, during the formation of silver halide grains, during physical ripening after the formation of silver halide grains. What is necessary is just to add at the arbitrary places of each process. In order to obtain a silver halide emulsion satisfying the above-mentioned conditions, the heavy metal compound can be dissolved together with the halide salt and continuously added throughout the grain forming process or a part thereof.

The amount of the heavy metal ion added to the silver halide emulsion is more preferably from 1 × 10 ⁻⁹ mol to 1 × 10 ⁻² mol, particularly 1 × 10 ⁻⁸ mol to 5 × 10 mol per mol of silver halide. ^-5 mol is preferred.

  Any silver halide grains can be used in the present invention. One preferable example is a cube having a [100] plane as a crystal surface. Also, U.S. Pat. Nos. 4,183,756, 4,225,666, JP-A-55-26589, JP-B-55-42737, The Journal of Photographic Science (J. Photogr. Sci.) 21, 39 (1973) and the like, particles having a shape such as octahedron, tetrahedron, dodecahedron, etc. can be produced and used. Furthermore, particles having twin planes may be used.

  The silver halide grains used in the present invention are preferably grains having a single shape, but it is particularly preferred to add two or more monodispersed silver halide emulsions in the same layer.

  The particle size of the silver halide grains used in the present invention is not particularly limited, but is preferably 0.1 to 1.2 μm, more preferably in consideration of other photographic performance such as rapid processability and sensitivity. Is in the range of 0.2 to 1.0 μm.

  This particle size can be measured using the projected area or diameter approximation of the particle. If the particles are substantially uniform in shape, the particle size distribution can be expressed fairly accurately as a diameter or projected area.

  The particle size distribution of the silver halide grains of the present invention is preferably monodispersed silver halide grains having a coefficient of variation of 0.22 or less, more preferably 0.15 or less, and particularly preferably a coefficient of variation of 0.15 or less. 2 or more of these monodispersed emulsions are added to the same layer. Here, the variation coefficient is a coefficient representing the breadth of the particle size distribution, and is defined by the following equation.

Coefficient of variation = S / R (where S is the standard deviation of the particle size distribution and R is the average particle size)
The particle diameter here means the diameter in the case of spherical silver halide grains, and the diameter when the projected image is converted into a circular image of the same area in the case of grains other than a cube or a sphere. Represent.

  As an apparatus and method for preparing a silver halide emulsion, various apparatuses and methods known in the art can be used.

  The silver halide emulsion used in the present invention may be obtained by any of the acidic method, neutral method and ammonia method. The particles may be grown at one time, or may be grown after the seed particles are made. The method for making seed particles and the method for growing them may be the same or different.

  Further, the form of reacting the soluble silver salt and the soluble halide salt may be any of a forward mixing method, a back mixing method, a simultaneous mixing method, a combination thereof, and the like, but those obtained by the simultaneous mixing method are preferred. Furthermore, the pAg controlled double jet method described in JP-A No. 54-48521 can be used as one type of the simultaneous mixing method.

  Further, an apparatus for supplying a water-soluble silver salt and a water-soluble halide salt aqueous solution from an adding device disposed in a reaction mother liquor described in JP-A-57-92523, JP-A-57-92524, etc. The reaction mother liquor is taken out of the reactor described in Japanese Patent Publication No. 56-501776, etc., which continuously adds the water-soluble silver salt and water-soluble halide salt aqueous solution described in No. 921,164, etc. Alternatively, an apparatus that forms grains while keeping the distance between silver halide grains constant by concentration by ultrafiltration may be used.

  Further, if necessary, a silver halide solvent such as thioether may be used. Further, a compound having a mercapto group, a nitrogen-containing heterocyclic compound, or a compound such as a sensitizing dye may be added at the time of forming silver halide grains or after the completion of grain formation.

  The silver halide emulsion used in the present invention can be used in combination of a sensitizing method using a gold compound and a sensitizing method using a chalcogen sensitizer.

  As a chalcogen sensitizer applied to the silver halide emulsion used in the present invention, a sulfur sensitizer, a selenium sensitizer, a tellurium sensitizer and the like can be used, and a sulfur sensitizer is preferable. Examples of the sulfur sensitizer include thiosulfate, allylthiocarbamide thiourea, allyl isothiocyanate, cystine, p-toluenethiosulfonate, rhodanine, inorganic sulfur and the like.

The amount of the sulfur sensitizer used in the present invention is preferably changed depending on the type of silver halide emulsion to be applied and the expected effect, but 5 × 10 ⁻¹⁰ per mole of silver halide. A range of ˜5 × 10 ⁻⁵ mol, preferably a range of 5 × 10 ^{−8 to} 3 × 10 ⁻⁵ mol is preferred.

As the gold sensitizer used in the present invention, various gold complexes such as chloroauric acid and gold sulfide can be added. Examples of the ligand compound used include dimethyl rhodanine, thiocyanic acid, mercaptotetrazole, mercaptotriazole and the like. The amount of gold compound used is not uniform depending on the type of silver halide emulsion, the type of compound used, ripening conditions, etc., but usually 1 × 10 ⁻⁴ mol to 1 × 10 ⁻⁹ per mol of silver halide. Mole is preferred. More preferably, it is 1 * 10 <^-5> mol-1 * 10 <^-8> mol.

  As a chemical sensitization method for the silver halide emulsion used in the present invention, a reduction sensitization method may be used.

  The silver halide emulsion contains a known antifoggant for the purpose of preventing fogging that occurs during the preparation process of silver halide light-sensitive materials, reducing fluctuations in performance during storage, and preventing fogging that occurs during development. An agent can be used. Examples of preferable compounds that can be used for such purposes include compounds represented by the general formula (II) described in JP-A-2-14636, page 7, lower column, and more preferable specific compounds. As the compounds (IIa-1) to (IIa-8) and (IIb-1) to (IIb-7) described on page 8 of the same publication, and 1- (3-methoxyphenyl) -5-mercapto Examples thereof include compounds such as tetrazole and 1- (4-ethoxyphenyl) -5-mercaptotetrazole.

  Depending on the purpose, these compounds are added in steps such as a silver halide emulsion grain preparation step, a chemical sensitization step, a chemical sensitization step, and a coating solution preparation step.

When chemical sensitization is carried out in the presence of these compounds, it is preferably used in an amount of about 1 × 10 ⁻⁵ mol to 5 × 10 ⁻⁴ mol per mol of silver halide. When added at the end of chemical sensitization, the amount is preferably about 1 × 10 ⁻⁶ mol to 1 × 10 ⁻² mol per mol of silver halide, preferably 1 × 10 ⁻⁵ mol to 5 × 10 ⁻³ mol. More preferred.

In the coating solution preparation step, when added to the silver halide emulsion layer, the amount of 1 × 10 ^-6 mol to 1 × 10 ^-1 mol per mol of silver halide is preferred, 1 × 10 ^-5 mol to 1 × 10 ⁻² mol is more preferred. When added to a layer other than the silver halide emulsion layer, the amount in the coating film is preferably about 1 × 10 ⁻⁹ mol to 1 × 10 ⁻³ mol per 1 m ² .

The number of silver halide grains per photosensitive layer of the silver halide color photographic light-sensitive material according to the present invention is preferably 7.0 × 10 ^{11 to} 1.0 × 10 ¹⁴ particles / m ² , more preferably 2 0.0 × 10 ^{12 to} 1.0 × 10 ¹³ pieces / m ² .

In addition to the silver halide color photographic light-sensitive material described in detail above, the silver halide photographic light-sensitive material that can be used is not particularly limited, and various photographic elements such as monochrome silver halide photographic light-sensitive materials (general Monochrome film, medical film, printing film, etc.), or silver halide color photographic light-sensitive material, specifically, a color negative film, a color reversal film, a color movie film, etc. can be mentioned as an example. The details of the silver halide color photographic light-sensitive material including the items described above are described in the following Research Disclosure (hereinafter abbreviated as RD) and can be referred to.
[Item] [Page of RD308119] [RD17643] [RD18716]
Chemical sensitizer 996 III-A 23 648
Spectral sensitizer 996 IV-AA,
B, C, D, 23-24 648-649
H, I, J Item Supersensitizer 996 IV-AE, J Item
23-24 648-649
Antifoggant 998 VI 24-25 649
Stabilizer 998 VI 24-25 649
Known photographic additives that can be used in silver halide color photographic light-sensitive materials are also described in the RD. The following is a relevant description.
[Item] [Page of RD308119] [RD17643] [RD18716]
Anti-turbidity agent 1002 VII-I Item 25 650
Dye Image Stabilizer 1001 VII-J Item 25
Brightener 998V 24
UV absorber 1003VIII-I,
Item XIII-C 25-26
Light absorber 1003VIII 25-26
Light scattering agent 1003VIII
Filter dye 1003VIII 25-26
Binder 1003IX 26 651
Antistatic agent 1006XIII 27 650
Hardener 1004X 26 651
Plasticizer 1006XII 27 650
Lubricant 1006XII 27 650
Activating agent / Coating aid 1005XI 26-27 650
Matting agent 1007XVI
Developer (contained in silver halide color photographic materials)
1001XXB Various couplers can be used in the photosensitive layer according to the present invention, and specific examples thereof are described in the above RD. The following is a relevant description.

[Item] [Page of RD308119] [RD17643]
Yellow Coupler 1001 VII-D Item VIIC-G Item Magenta Coupler 1001 VII-D Item VIIC-G Cyan Coupler 1001 VII-D Item VIIC-G Item Colored Coupler 1002 VII-G Item VIIG Item DIR Coupler 1001VII-F Item VIIF Item BAR Coupler 1002VII- Item F Release of other useful residues 1001VII-F Item Coupler Alkali-soluble coupler Item 1001VII-E The above additives can be added by the dispersion method described in RD308119XIV.

  The silver halide color photographic light-sensitive material can be provided with auxiliary layers such as a filter layer and an intermediate layer described in the above-mentioned item RD308119VII-K.

  The silver halide color photographic light-sensitive material can have various layer structures such as a normal layer, a reverse layer, and a unit structure described in the above-mentioned item RD308119VII-K.

  In addition, in the stereoscopic image display method of the present invention, it is one of preferred embodiments that the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources.

  In the image forming method of forming by light exposure using the four different wavelengths as described above, in particular, the pinhole array and the stereoscopic display image according to the present invention are provided to face each other on different surfaces of the same support. It is effective to apply to a stereoscopic image display method. For example, an infrared image containing a yellow coupler, a magenta coupler, and a cyan coupler on one side of a transparent support having a sensitivity in the infrared region as an image for a pinhole array and forming a black color after development processing. A multilayer having a photosensitive layer, and a conventional blue-sensitive layer, green-sensitive layer and red-sensitive layer having sensitivity in the visible light region as a stereoscopic display image recording material on the other surface of the transparent support. A silver halide emulsion layer is provided. For the recording material having this configuration, the pinhole array surface side is imagewise exposed using infrared light to form a pinhole image, and the stereoscopic display image surface side is For example, after performing exposure using three kinds of light sources of blue light, green light, and red light, color development is performed to form an image.

  The imagewise exposed silver halide color photographic light-sensitive material is developed using a color developer, and generates a desired silver image and color image in a suitable processing apparatus under a suitable time and temperature condition. . Thereafter, processing steps known in the art, such as, but not limited to, a development stopping step, a bleaching step, a fixing step, a bleaching / fixing step, a washing (or rinsing) step, a stabilizing step and a drying step are included. Through each processing step, development processing can be performed.

  For example, in the processing of a color negative film, the process C-41 (Eastman Kodak) or the process CNK-4 (Konica), the color paper processing RA-4 (Eastman Kodak) or process Examples include various processing steps including CPK-2 treatment (manufactured by Konica) and process E-6 treatment (manufactured by Eastman Kodak) or process CRK-2 treatment (manufactured by Konica) that processes color reversal films. it can.

  In the present invention, it is preferable to use a silver halide color photographic light-sensitive material for both the pinhole array and the three-dimensional display image in that both image formation and arithmetic processing can proceed in parallel.

  In the stereoscopic image display method of the present invention, it is preferable to use an optical recording material as one of the image recording materials used for creating a pinhole array or a stereoscopic display image.

  This optical recording material may be any known optical recording material as long as it contains a dye or a dye precursor. For example, an optical recording material capable of obtaining a high-quality color image by an azomethine dye by a simple dry treatment can be mentioned. Specifically, a microcapsule enclosing a dye precursor of an azomethine dye having a specific structure; And an optical recording material in which an oil droplet containing a photopolymerization initiator and a polymerizable electrophile and a photosensitive layer containing a binder are provided on a transparent support. And what a photoinitiator is a cationic pigment | dye / anionic boron compound complex is mentioned as a preferable example.

  This image forming method using an optical recording material comprises a transparent support, a microcapsule encapsulating a dye precursor, oil droplets containing a polymerizable electrophile and a photopolymerization initiator, and a photosensitive layer containing a binder. The image is exposed imagewise, radicals are generated from the exposed photopolymerization initiator, the radicals are added to the polymerizable electrophile to initiate polymerization, and the polymerizable electrophile is image-immobilized. To do. Thereafter, the unpolymerized electrophile and the dye precursor are brought into contact and reacted by heating to obtain a dye image.

  Examples of the dye precursor used in the optical recording material according to the present invention include compounds described in paragraph numbers [0006] to [0047] of JP-A No. 2001-13680. For the microencapsulation of the dye precursor, the polymerizable electrophile, the photopolymerization initiator, the oil droplets, and the like, the methods or compounds described in paragraphs [0052] to [0074] can also be referred to.

  The optical recording material according to the present invention combines a plurality of photopolymerization initiators having different photosensitive wavelengths and a plurality of dye precursors having different colors to form a multicolor or full color image. For example, it is possible to obtain an optical recording material for forming a full-color image by laminating three photosensitive layers that are colored in cyan, magenta, and yellow and have different photosensitive wavelengths. An intermediate layer may be provided between the respective layers, and a protective layer, a filter layer, and the like may be provided.

  When selecting an exposure light source, of course, a light source suitable for the photosensitive wavelength of the optical recording material is selected, but whether the image information passes through an electrical signal, the overall processing speed, compactness, power consumption, etc. It is preferable to select appropriately in consideration.

  When recording image information via an electrical signal, a light emitting diode or various lasers may be used as the image exposure device, or various devices known as image display devices (CRT, liquid crystal display, projector). A troluminescence display, an electrochromic display, a plasma display, or the like can also be used. In this case, the image information includes an image signal obtained from a video camera or an electronic still camera, a television signal typified by the Nippon Television Signal Standard (NTSC), and an image signal obtained by dividing an original image into a large number of pixels by a scanner or the like. In addition, image signals stored in recording materials such as magnetic tapes and disks can be used.

  When exposing color images, LEDs, lasers, fluorescent tubes, etc. are used in combination in accordance with the color sensitivity of the optical recording material, but the same may be used in combination, or different types may be used in combination. Good. The color sensitivity of optical recording materials is usually R (red), G (green), and B (blue) photosensitivity in the photographic field, but in recent years, they are used in combination with UV (ultraviolet), IR (infrared), and the like. In many cases, the range of use of light sources is expanding. For example, the color sensitivity of the optical recording material is (G, R, IR), (R, IR (short wave), IR (long wave)), (UV (short wave), UV (medium wave), UV (long wave). )), Spectral regions such as (UV, B, G) are used. The light source may also be a combination of different types such as a combination of two LED colors and a laser. The arc tube or element may be scanned and exposed using a single tube or element for each color, or an array in order to increase the exposure speed. Available arrays include LED arrays, liquid crystal shutter arrays, magneto-optical element shutter arrays, and the like.

  In addition, a blue light-emitting diode, which has recently made remarkable progress, and a light source combined with a green light-emitting diode and a red light-emitting diode can be used.

  In the stereoscopic image display method of the present invention, it is one of preferred embodiments that the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as the light sources among the above-described light sources.

  In the image forming method of forming by light exposure using the four different wavelengths as described above, in particular, the pinhole array and the stereoscopic display image according to the present invention are provided to face each other on different surfaces of the same support. It is effective to apply to a stereoscopic image display method. For example, a black image forming layer having color sensitivity in the infrared region is provided on one surface of the transparent support as an image for a pinhole array, and a recording material for stereoscopic display images is provided on the other surface of the transparent support. In the visible light region, for example, blue, green and red, layers having color sensitivity are provided. For the recording material having this configuration, the pinhole array surface side is imagewise exposed using infrared light to form a pinhole image, and the stereoscopic display image surface side is For example, after performing exposure using three types of light sources of blue light, green light, and red light, development is performed to form an image.

  As the image display device, there are a color display device and a monochrome display device such as a CRT, and a method of performing exposure several times by combining a monochrome display device with a filter may be adopted. An existing two-dimensional image display device may be used in a one-dimensional manner like FOT, or may be used in combination with scanning by dividing one screen into several. As the heating means, as in the optical recording material described in JP-A-61-294434, a heating element layer may be provided on the surface of the support on which the photosensitive layer of the optical recording material is not coated. Good. Further, a hot plate, an iron and a hot roller are used as described in JP-A-61-147244, or an optical recording material is sandwiched between the heat roller and a belt as described in JP-A-62-144166. You may use the method of heating by. That is, the optical recording material may be brought into contact with a heating element having a surface area equal to or larger than the area of the optical recording material and the entire surface may be heated simultaneously, or a heating element having a smaller surface area (for example, a hot plate, a heating roller, a heat It may be brought into contact with a drum, etc.) and scanned to scan the entire surface over time. In addition to the heating method in which the heating element and the optical recording material are in direct contact as described above, electromagnetic waves, infrared rays, hot air, or the like can be applied to the optical recording material and heated in a non-contact state. In the present invention, when heating is performed from the surface on the support on which the photosensitive layer of the optical recording material is not coated, the surface on which the photosensitive layer is coated may be in direct contact with air. However, in order to prevent moisture and volatile components from evaporating from the optical recording material, and to keep the heat from escaping, it may be covered with a heat insulating material or the like.

  It is preferable that the heating is performed after 0.1 seconds or more has elapsed after the imagewise exposure. The heating temperature is generally 60 to 250 ° C., preferably 80 to 180 ° C., and the heating time is between 0.1 seconds and 5 minutes. Moreover, you may heat twice or more at different temperature.

  In the present invention, it is preferable to use an optical recording material for both the pinhole array and the stereoscopic display image in that both image formation and arithmetic processing can proceed in parallel.

  In the stereoscopic image display method of the present invention, it is preferable to use a heat-sensitive recording material as one of the image recording materials used for creating a pinhole array or a stereoscopic display image.

  The heat-sensitive recording material that can be used in the present invention may be any known heat-sensitive recording material that contains a dye or a dye precursor. For example, a first thermosensitive coloring layer containing an electron donating dye precursor and an electron accepting compound as main components on a transparent support, a diazonium salt compound having a maximum absorption wavelength of 360 ± 20 nm, the diazonium salt compound and heat A second thermosensitive color-developing layer containing a coupler which develops color upon reaction, a third containing a diazonium salt compound having a maximum absorption wavelength of 400 ± 20 nm, and a coupler which reacts with the diazonium salt compound to develop color Multi-color heat-sensitive recording material comprising the heat-sensitive color-developing layers sequentially laminated, and a heat-sensitive recording material in which a plurality of electron-donating dye precursors and electron-accepting compounds described in Japanese Patent Publication No. 49-69 coexist is prepared. In addition, a method for obtaining images of different hues by applying different temperatures by utilizing different color development start temperatures of the respective electron donating dye precursors, and further, Japanese Patent Publication No. 49-27708. No. 1 and Japanese Patent Publication No. SHO 51-5792 have two layers of thermosensitive recording layers that develop colors in different hues. A method for obtaining a heat-sensitive recording material, proposed in Japanese Patent Publication No. 51-5791, a first thermosensitive coloring layer comprising a diazonium salt compound and a coupler on a transparent support, an intermediate layer containing a polyether compound, basic A multicolor thermosensitive recording material having a second thermosensitive coloring layer composed of a dye precursor and an electron accepting compound, proposed in Japanese Patent Publication No. 51-29024, a thermosensitive composed of a basic dye precursor and an electron accepting compound In a two-color thermosensitive recording material in which two color-developing layers are laminated, a method in which guanidines, which are organic base compounds, are added to the low-temperature color-developing layer, and the color development of the low-temperature color-developing layer is erased when the high-temperature color-developing layer is colored, Furthermore, a high-temperature thermosensitive coloring layer composed of an acidic dye precursor and an organic basic compound and a low-temperature coloring layer composed of a basic dye precursor and an electron-accepting compound are proposed on Japanese Patent Publication No. 51-37542. A multi-color heat-sensitive recording material, etc., which is laminated and has a lower layer organic base compound diffused into the upper layer during high temperature printing to discolor the colored body.

  As one of the methods for reproducing a full-color image by direct thermal recording, a thermal recording layer 2 is a combination of two diazonium salts having different photosensitive wavelengths and a coupler that reacts with each diazonium salt and develops a different hue when heated. There is also known a heat-sensitive recording material that can reproduce a good multicolor image by laminating a layer and a heat-sensitive recording layer combining a basic dye precursor and an electron-accepting compound, and any of the above can be used in the present invention. It is.

  In the stereoscopic image display method of the present invention, it is one of the preferred embodiments that the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as the light sources among the above-mentioned light sources.

  In the image forming method of forming by light exposure using the four different wavelengths as described above, in particular, the pinhole array and the stereoscopic display image according to the present invention are provided to face each other on different surfaces of the same support. It is effective to apply to a stereoscopic image display method. For example, a heat-sensitive recording layer for forming a black image having color sensitivity in the infrared region is provided as an image for pinhole array on one surface of the transparent support, and a stereoscopic display image is provided on the other surface of the transparent support. As the recording material, a heat-sensitive recording layer having color sensitivity in, for example, blue, green, and red is provided in the visible light region. For the recording material having this configuration, the pinhole array surface side is imagewise exposed using infrared light to form a pinhole image, and the stereoscopic display image surface side is For example, after performing exposure using three kinds of light sources of blue light, green light, and red light, heat treatment is performed to form an image.

  In the present invention, it is preferable to use a heat-sensitive recording material for both the pinhole array and the stereoscopic display image in that both image formation and arithmetic processing can proceed in parallel.

  In the stereoscopic image display method of the present invention, it is preferable that the pinhole array and the stereoscopic display image according to the present invention described above are provided opposite to each other on different surfaces of the same support.

  From the viewpoint of separating the pinhole array and the stereoscopic display image at an optimum distance in the above configuration, the support used in the above configuration, specifically the transparent support, has a thickness of 1 mm to 10 mm, particularly 2 mm to 5 mm. Those are preferred.

  In the present invention, the three-dimensional image display method or the three-dimensional image display material of the present invention can be applied to a falsification preventing laminate, a falsification preventing card or a falsification preventing printed matter.

  Hereinafter, although the forgery / alteration prevention laminate, the forgery / alteration prevention card and the forgery / alteration prevention printed matter of the present invention will be described, the forgery / alteration prevention laminate, the forgery / alteration prevention card and the forgery / alteration prevention printed matter of the invention are not limited thereto.

  The support for use in the anti-counterfeit laminate, the anti-counterfeit card and the anti-counterfeit printed matter is not particularly limited as long as it has a functionally necessary mechanical strength, for example, paper, coated paper, synthetic paper, etc. Various papers known per se, vinyl chloride resin sheet, polyethylene terephthalate base film or sheet, polycarbonate film or sheet, and the like can be mentioned. In addition, the support may be a single sheet made of the various materials described above, or a composite laminated sheet in which sheets made of the various materials in the previous period are combined.

  As a pinhole array and a three-dimensional display image forming method of an anti-counterfeit laminated body, an anti-counterfeit card and a falsification-preventing printed matter, a silver halide photosensitive material in which the pinhole array and the three-dimensional display image are formed on the support in advance Samples obtained by laminating image recording materials such as optical recording materials and heat-sensitive recording materials, or coating the support with an image forming layer of an image recording material such as a silver halide photosensitive material, optical recording material, or heat-sensitive recording material And a method of forming a pinhole array and a stereoscopic display image.

  The anti-counterfeit laminate, the anti-counterfeit card and the anti-counterfeit printed matter may be provided with embossing, signature, IC memory, optical memory, magnetic recording layer, other printing, etc. as necessary. Moreover, the forgery / alteration prevention laminate, the falsification prevention card and the falsification prevention printed matter may be provided with a laminate or the like as necessary.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

Example 1
<Production of pinhole array>
[Production of pinhole array 1]
A sample was prepared by coating the same structure as that of the sample 101 described in Example 1 of JP-A-2002-31540 on a transparent support made of polyethylene terephthalate having a thickness of 1 mm. Next, the output of each laser is adjusted on this sample so that the image after each development processing becomes black using a red laser, a green laser, and a blue laser, and a pinhole array image having the configuration shown in FIG. (A: B = 1: 1, a / b = 1) is exposed under the condition that the aperture ratio is 6.25%, and then described in paragraph number [0118] of Japanese Patent Laid-Open No. 2002-31540. According to the method, a color development process was performed to produce a pinhole array 1. The pinhole array 1 is composed of 240 units × 240 units, and one unit is composed of 64 pixels × 64 pixels. The aperture ratio of the pinhole was 6.25%, and was adjusted by the size of the unexposed transparent pixel area in 64 pixels per unit. The maximum visual density was 2.5.

[Production of pinhole array 2]
In the production of the pinhole array 1, the aperture ratio is set to 12. A pinhole array 2 was produced in the same manner except that the percentage was changed to%.

[Production of pinhole array 3]
In the production of the pinhole array 1, the pinhole shape is changed to a rectangle (A: B = 2: 1) as shown in FIG. 2, and the vertical pitch / horizontal pitch (a / b) is 1.0, and the opening A pinhole array 3 was produced in the same manner except that the rate was 12.5%.

[Production of pinhole array 4]
In the production of the pinhole array 1, the pinhole shape is changed to a rectangle (A: B = 3: 1) as shown in FIG. 2, and the vertical pitch / lateral pitch (a / b) is 1.0, and the opening A pinhole array 4 was produced in the same manner except that the rate was 18.8%.

[Production of pinhole array 5]
In the production of the pinhole array 1, a square pinhole array image is arranged in the same manner except that the vertical pitch / lateral pitch (a / b) is 2.0 and the aperture ratio is 12.5%. A hole array 5 was produced.

[Production of pinhole array 6]
In the production of the pinhole array 5, the pinhole array 6 was produced in the same manner except that the vertical pitch / lateral pitch (a / b) was changed to 3.0 and the aperture ratio was 18.8%.

[Production of pinhole array 7]
In the production of the pinhole array 1, the pinhole shape is changed to a rectangle (A: B = 1.5: 1) as shown in FIG. 2, and the vertical pitch / horizontal pitch (a / b) is 1.5. A pinhole array 7 was produced in the same manner except that the aperture ratio was 14.1%.

《Formation of stereoscopic display image》
A sample was prepared by coating the same structure as that of the sample 101 described in Example 1 of JP-A-2002-31540 on a transparent support made of polyethylene terephthalate having a thickness of 1 mm. Next, a still image at each of the lattice-like positions of 64 × 64 × 4096 is taken by DSC, and the image-processed stereoscopic display image data is applied to the prepared sample with a red laser, a green laser, and a blue laser. After the image for stereoscopic display was exposed using a laser, color development processing was performed according to the method described in paragraph No. [0118] of JP-A No. 2002-31540 to form a stereoscopic display image.

<< Preparation of stereoscopic image display sample >>
The prepared pinhole arrays 1 to 7 and the stereoscopic display image were bonded to each other to prepare stereoscopic image display samples 1 to 7.

<< Evaluation of stereoscopic images >>
About the produced said stereo image display samples 1-7, each following evaluation is performed and the obtained result is shown in Table 1.

[Evaluation of brightness]
Luminance (brightness) was taken as a measure of luminance based on the aperture ratio of each pinhole array.

[Evaluation of three-dimensionality and sharpness]
About each said stereo image display sample, 20 test subjects visually observe and evaluate a three-dimensional effect according to the following reference | standard, Among the following evaluation ranks of 20 people, the rank with the most evaluation is the stereo image. It was set as the evaluation rank of the display sample.

10: Very good stereoscopic effect and excellent image sharpness 7: Good stereoscopic effect is observed, and the image sharpness is good 5: Almost acceptable stereoscopic effect is recognized However, it is an image that is slightly lacking in three-dimensional effect and sharpness. 1: It is an image that does not have a three-dimensional effect at all, and is extremely lacking in sharpness. In the above-mentioned evaluation ranks, ranks 9, 8, 6, 4 2 was determined as an intermediate characteristic between the upper and lower ranks. In this invention, if it was rank 5 or more, it was judged that it was a tolerance | permissibility practically as a three-dimensional feeling and sharpness.

  The results obtained as described above are shown in Table 1.

  As is clear from the results in Table 1, a pinhole array of a pinhole array is used in a stereoscopic image display sample prepared by bonding a sample in which a pinhole array and a stereoscopic display image are formed on each transparent support. As an image, the pinhole array of the present invention having pinhole groups having different long side lengths and short side lengths, or the pinhole array of the present invention having pinhole group arrays having different vertical and horizontal pitches. It can be seen that the sample used has excellent display image characteristics (stereoscopic effect, sharpness) even under conditions with a high aperture ratio, that is, high luminance, compared to the comparative example.

Example 2
<< Preparation of stereoscopic image display sample 21 >>
[Formation of images for stereoscopic display]
A sample was prepared by coating the same structure as that of the sample 101 described in Example 1 of JP-A-2002-31540 on a transparent support made of polyethylene terephthalate having a thickness of 1 mm. Next, a still image at each of the lattice-like positions of 64 × 64 × 4096 is taken by DSC, and the image-processed stereoscopic display image data is applied to the prepared sample with a red laser, a green laser, and a blue laser. After the image for stereoscopic display was exposed using a laser, color development processing was performed according to the method described in paragraph No. [0118] of JP-A No. 2002-31540 to form a stereoscopic display image.

[Formation of pinhole array]
A pinhole array image consisting of a black image similar to the pinhole array 3 described in Example 1 is formed on the opposite surface of the transparent support on which the stereoscopic display image is formed by an inkjet recording method according to the following method ( A rectangle of the shape shown in FIG. 2 (A: B = 2: 1), vertical pitch / horizontal pitch (a / b) = 1.0, aperture ratio 12.5%) was printed.

(Preparation of black ink)
<Preparation of Black Pigment Dispersion 1>
Carbon black 20% by mass
Styrene-acrylic acid copolymer (molecular weight 7,000, acid value 150) 9% by mass
Glycerin 10% by mass
Ion-exchanged water 61% by mass
The above additives were mixed and dispersed using a horizontal bead mill (System Zeta Mini manufactured by Ashizawa Co., Ltd.) filled with 0.3% zirconia beads at a volume ratio of 60% to obtain a black pigment dispersion 1. The average particle size of the obtained black pigment was 75 nm.

<Preparation of black ink>
Black pigment dispersion 1 10% by mass
20% by mass of ethylene glycol
Diethylene glycol 10% by mass
Surfactant (Surfinol 465 manufactured by Nissin Chemical Industry Co., Ltd.) 0.1% by mass
Ion-exchanged water 59.9% by mass
The above compositions were mixed, stirred, and filtered through a 1 μm filter to prepare a black ink that was a pigment ink.

(Inkjet image printing)
Using an on-demand inkjet printer with a maximum recording density of 720 × 720 dpi, equipped with a piezo head having a nozzle hole diameter of 20 μm, a driving frequency of 12 kHz, 128 nozzles per color, and a nozzle density of 180 dpi between the same colors, The pinhole array image was printed on the opposite surface on the transparent support on which the stereoscopic display image was formed.

<< Production of Stereoscopic Image Display Samples 22-25 >>
In the production of the stereoscopic image display sample 21, a stereoscopic image is similarly obtained except that the pinhole array image of the pinhole array 3 is changed to the pinhole array images of the pinhole arrays 4 to 7 described in the first embodiment. Display samples 22 to 25 were produced.

<< Evaluation of stereoscopic images >>
About the produced stereoscopic image display samples 21 to 25 and the stereoscopic image display samples 1 and 2 produced in Example 1, evaluation of luminance and evaluation of stereoscopic effect and sharpness evaluation are performed in the same manner as in the method described in Example 1. Table 2 shows the results obtained.

  As is clear from the results in Table 2, the pinhole array and the stereoscopic display image are provided opposite to each other on the same support, and have a pinhole group having different long side lengths and short side lengths. The sample using the pinhole array of the present invention or the pinhole array of the present invention having a pinhole group arrangement in which the vertical pitch and the horizontal pitch are different from those of the comparative example under conditions that have a high aperture ratio, that is, a high luminance. However, it turns out that it has the outstanding display image characteristic (three-dimensional effect, sharpness).

Example 3
<< Preparation of Sample B for Stereoscopic Image Display >>
A sample 101 described in Example 1 of Japanese Patent Application Laid-Open No. 2001-209152 on a transparent support made of polyethylene terephthalate having a film thickness of 1 mm contains first infrared-sensitive silver halide emulsions a, b, and c. The yellow coupler, magenta coupler, and cyan coupler used in the preparation of Sample 101 described in Example 1 of JP-A No. 2002-31540 are emulsified and dispersed in the layer, and the image obtained after the color development processing described below exhibits a black color. A pinhole array was formed by applying a coating solution to which each coupler was added at a ratio. Next, the same structure as the sample 101 described in Example 1 of JP-A-2002-31540 is applied to the surface of the transparent support opposite to the surface on which the pinhole array is provided, A stereoscopic image display sample B was prepared by providing a stereoscopic display image forming layer.

<< Preparation of stereoscopic image display sample 31 >>
Using the prepared sample A for stereoscopic image display, a pinhole array image similar to the pinhole array 3 described in Example 1 was exposed to the pinhole array surface side using an infrared laser. Next, on the surface of the 3D display image forming layer, a still image at each of the grid-like positions of 64 × 64 × 4096 is captured by DSC, and the processed 3D display image data is used as the sample prepared above. Then, the image for stereoscopic display was exposed using a red laser, a green laser, and a blue laser. That is, the three-dimensional image display sample B was exposed with light sources having four different wavelengths of an infrared laser, a red laser, a green laser, and a blue laser.

  Subsequently, the exposed three-dimensional image display sample A was subjected to color development processing according to the method described in paragraph No. [0118] of JP-A No. 2002-31540 to produce a three-dimensional image display sample 11. This pinhole array had an aperture ratio of 6.25%, and was adjusted by the size of an unexposed transparent pixel area in 64 pixels per unit. The maximum visual density was 2.5.

<< Production of Stereoscopic Image Display Samples 32-35 >>
In the production of the stereoscopic image display sample 31, a stereoscopic image is similarly obtained except that the pinhole array image of the pinhole array 3 is changed to the pinhole array images of the pinhole arrays 4 to 7 described in the first embodiment. Display samples 32-35 were prepared.

<< Evaluation of stereoscopic images >>
About the produced stereoscopic image display samples 31 to 35 and the stereoscopic image display samples 1 and 2 produced in Example 1, evaluation of luminance and evaluation of stereoscopic effect and sharpness evaluation are performed in the same manner as the method described in Example 1. Table 3 shows the results obtained.

  As is clear from the results in Table 3, a pinhole array and a stereoscopic display image are provided opposite to different surfaces of the same support, and a stereoscopic image is formed by exposure using four different wavelengths as light sources. As the pinhole array image of the hole array, the pinhole array of the present invention having a pinhole group having a different long side length and a short side length, or a book having a pinhole group array having a different vertical pitch and horizontal pitch. It can be seen that the sample using the pinhole array of the invention has excellent display image characteristics (stereoscopic effect, sharpness) even under conditions having a high aperture ratio, that is, high luminance, as compared with the comparative example.

Example 4
As a result of producing an ID card and an IC card according to a conventional method in the same manner as the methods described in Examples 1 to 3, the ID card and the IC card having the configuration of the present invention have high design and prevent forgery and alteration. It was confirmed that the effect was excellent.

It is a schematic diagram which shows an example of the pinhole arrangement | sequence which comprises the pinhole array used conventionally. It is a schematic diagram which shows an example of the pinhole array comprised from the pinhole group from which the length of the long side length and short side length which concern on this invention differ. It is a schematic diagram which shows an example of the pinhole array which has a pinhole group arrangement | sequence from which the vertical pitch and horizontal pitch which concern on this invention differ.

Explanation of symbols

1 Pinhole array 2 Pinhole A Long side length of pinhole B Short side length of pinhole a Vertical pitch of pinhole b Horizontal pitch of pinhole

Claims (22)

It is composed of a combination of a pinhole array having a pinhole group having a long side length and a short side length different from each other and a stereoscopic display image created from data subjected to image processing for stereoscopic display. 3D image display method. It is composed of a combination of a pinhole array having a pinhole group arrangement in which the vertical pitch (pinpole gap) and the horizontal pitch are different, and a stereoscopic display image created from data processed for stereoscopic display. A stereoscopic image display method. 2. The stereoscopic image display according to claim 1, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. Method. 3. The stereoscopic image display according to claim 2, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. Method. The stereoscopic image display method according to claim 1, wherein the pinhole array and the stereoscopic display image are provided opposite to each other on different surfaces of the same support. The stereoscopic image display method according to claim 2, wherein the pinhole array and the stereoscopic display image are provided opposite to each other on different surfaces of the same support. The stereoscopic image display method according to claim 1, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources. 3. The stereoscopic image display method according to claim 2, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources. It is composed of a combination of a pinhole array having a pinhole group having a long side length and a short side length different from each other and a stereoscopic display image created from data subjected to image processing for stereoscopic display. 3D image display material. It is composed of a combination of a pinhole array having a pinhole group arrangement in which the vertical pitch (pinpole gap) and the horizontal pitch are different, and a stereoscopic display image created from data processed for stereoscopic display. A stereoscopic image display material. The stereoscopic image display according to claim 9, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. material. The stereoscopic image display according to claim 10, wherein the pinhole array or the stereoscopic display image is formed of at least one selected from a silver halide photographic light-sensitive material, an optical recording material, and a thermal recording material. material. The stereoscopic image display material according to claim 9, wherein the pinhole array and the stereoscopic display image are provided so as to face each other on different surfaces of the same support. The stereoscopic image display material according to claim 10, wherein the pinhole array and the stereoscopic display image are provided to face each other on different surfaces of the same support. The stereoscopic image display material according to claim 9, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources. The stereoscopic image display material according to claim 10, wherein the pinhole array and the stereoscopic display image are formed by exposure using four different wavelengths as light sources. A three-dimensional image display method according to any one of claims 1 to 8, wherein the forgery / alteration-prevention laminate is characterized. The three-dimensional image display material of any one of Claims 9-16 is used, The forgery and alteration prevention laminated body characterized by the above-mentioned. A forgery / alteration prevention card using the stereoscopic image display method according to claim 1. A forgery / alteration prevention card using the stereoscopic image display material according to any one of claims 9 to 16. A three-dimensional image display method according to any one of claims 1 to 8, wherein the falsification-preventing printed matter. A three-dimensional image display material according to any one of claims 9 to 16 is used.

Images