JP2015060113A - Hologram laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hologram laminate having various designs according to the presence of point light sources.SOLUTION: A hologram laminate at least includes: a hologram layer having a transmission type Fourier-transform hologram region for converting light incident from point light sources into an optical image; and a transparent printing layer arranged so as to overlap at least part of the transmission type fourier-transform hologram region.

Description

  The present invention relates to a hologram laminate having various design properties depending on the presence or absence of a point light source.

  A hologram is recorded on a photosensitive material by causing two light beams (object light and reference light) having the same wavelength to interfere with each other and the wave front of the object light as interference fringes. When light of the same condition as the original reference light is applied to this hologram, a diffraction phenomenon due to interference fringes occurs, and the same wavefront as the original object light can be reproduced. In particular, transmission holograms have a unique property that incident light is converted into a predetermined image by light irradiation from a point light source and is expressed as a light image.

  For example, in Patent Document 1, as a hologram observing tool, a spectacle image can be viewed by using a pair of transmissive holograms as a lens on a spectacle frame and gazing at a point light source through the spectacles. Applications have been disclosed. Further, in Patent Document 2, a hologram observation sheet including an image conversion layer including a transmission hologram region and a non-hologram region other than the region on a transparent base material is bonded to a desired member, for example, an advertisement medium or the like The use as display bodies, such as a member for decoration, is indicated.

The transmission hologram can be formed, for example, according to the following method. First, a Fourier transform image is formed by calculation based on the image data of the original image to be displayed. Next, the data obtained by converting the Fourier transform image data into a binary value or more is converted into electron beam drawing data, and the electron beam drawing data is arranged in a desired range. For example, 10 pieces of electron beam drawing data are arranged in the vertical and horizontal directions. Based on the arranged electron beam drawing data, a transmission hologram master is prepared by an electron beam drawing apparatus. The transmission hologram master has a concavo-convex pattern corresponding to the Fourier transform image on its surface, and the concavo-convex shape is formed on the surface by transferring the original to an ultraviolet curable resin or the like on a substrate such as PET. The intended transmission hologram can be obtained.
When the transmission hologram formed by the above-described method is irradiated with light from a point light source, the incident light is converted in the uneven shape on the surface, and the information of the original image can be expressed as a light image.

JP 2007-011156 A JP 2007-041545 A

However, when the transmissive hologram is irradiated with light from a surface light source or a line light source, the entire light from the incident surface light source or line light source is converted. It happens throughout. At this time, since the optical image that should originally be expressed as a single image is superimposed along the shape of the surface light source or the line light source, the information of the original image cannot be expressed as the optical image. That is, when a display body or the like provided with the transmission hologram is used in a place without a point light source, an optical image is not expressed on the transmission hologram, and thus the observer cannot recognize the information on the optical image.
Moreover, in order to express the said optical image, a high light transmittance is calculated | required by the transmission type hologram. For this reason, when a design or the like that is different from an optical image expressed in a transmission hologram and that does not require a point light source is attached, it is usually necessary to provide a printed layer or the like in a region that does not overlap with the transmission hologram. That is, on the transmission hologram, only a light image expressed by light irradiation from a point light source can be displayed.
Thus, when not receiving light irradiation from a point light source, there exists a problem that a transmission type hologram is a thing with poor design property.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a hologram laminate having various design properties depending on the presence or absence of a point light source.

  In order to solve the above problems, the present invention provides a hologram layer having a transmission Fourier transform hologram region for converting light incident from a point light source into a desired optical image, and at least a part of the transmission Fourier transform hologram region. And a transparent printed layer disposed so as to overlap. The hologram laminate is provided.

  According to the present invention, when the transparent printing layer is arranged so as to overlap at least a part of the transmission Fourier transform hologram area in the hologram layer, when there is no light irradiation from the point light source, the printing information of the transparent printing layer On the other hand, when receiving light irradiation from a point light source, the optical image information appears in the transmission Fourier transform hologram region, so the optical image and the printing information of the transparent printing layer are simultaneously displayed. It is possible to display. Thus, it can be set as the hologram laminated body which has various design property with the presence or absence of a point light source.

  In the said invention, it is preferable to have a transparent base material in the surface side opposite to the surface which has the uneven | corrugated shape in the said transmission type Fourier-transform hologram area | region of the said hologram layer. It is because the thermal or mechanical strength of the hologram laminate of the present invention can be increased by having a transparent substrate.

  In the said invention, it is preferable to have an contact bonding layer in the surface side opposite to the surface which has the said uneven | corrugated shape in the said transmission type Fourier-transform hologram area | region of the said hologram layer. This is because by having the adhesive layer, the hologram laminate of the present invention can be used as an advertising medium or a decorative member by being bonded to a desired member such as a window glass.

  According to the present invention, the transparent laminate is disposed so as to overlap at least a part of the transmission type Fourier transform hologram region in the hologram layer, whereby a hologram laminate having various design properties according to the presence or absence of a point light source, There is an effect that can be done.

It is a schematic sectional drawing which shows an example of the hologram laminated body of this invention. It is explanatory drawing for demonstrating the example of the display mode of the hologram laminated body of this invention by the presence or absence of a point light source. It is explanatory drawing for demonstrating the hologram area | region in this invention. It is a schematic sectional drawing which shows the other example of the hologram laminated body of this invention. It is a schematic sectional drawing which shows the other example of the hologram laminated body of this invention. It is process drawing for demonstrating the hologram layer formation process in an Example.

  Hereinafter, the hologram laminate of the present invention will be described in detail. In the following description, the transmission Fourier transform hologram area on the hologram layer may be referred to as a hologram area.

  The hologram laminate of the present invention is disposed so as to overlap a hologram layer having a transmission Fourier transform hologram region for converting light incident from a point light source into a desired optical image, and at least a part of the transmission Fourier transform hologram region. And a transparent printing layer formed at least.

  The hologram laminate of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing an example of a hologram laminate of the present invention. As shown in FIG. 1, the hologram laminate 10 of the present invention includes a hologram layer 1 having at least a transmission Fourier transform hologram region (hologram region) 1a for converting light incident from a point light source into a desired optical image; And a transparent printing layer 2 disposed so as to overlap at least a part of the hologram region 1a. The hologram area 1a has a concavo-convex shape for expressing an optical image on the surface. In addition, the hologram layer 1 of the hologram laminate 10 shown in FIG. 1 has a region 1b that does not have the above-described concavo-convex shape (hereinafter may be referred to as a non-hologram region) in addition to the hologram region 1a. To do.

FIG. 2 is an explanatory diagram for explaining an example of the display mode of the hologram laminate of the present invention depending on the presence or absence of a point light source. FIG. 2 (a) is a hologram laminate by light reception from a linear light source such as a rod-like fluorescent lamp. FIG. 2B illustrates a display mode of a hologram laminate by light reception from a point light source such as an LED light source. The hologram laminate 10 in FIG. 2 is arranged such that the transparent printing layer 2 overlaps the entire hologram region 1a, and the hologram region 1a is formed based on a cross-shaped pattern as an original image.
As shown in FIG. 2 (a), when the observer 20 observes the hologram laminate 10 of the present invention that has been irradiated with light from the line light source A, in the hologram region 1a, the transparent printed layer 2 overlapping the region is formed. The printed print information X can be visually recognized. At this time, since the conversion of incident light occurs in the entire linear light source in the hologram region 1a, a cross-shaped optical image is superimposed so as to follow the shape of the linear light source, resulting in a non-optical image Z. For this reason, an optical image is not expressed on the hologram area 1a, and the observer 20 cannot visually recognize the cross-shaped optical image.
On the other hand, as shown in FIG. 2B, when the observer 20 observes the hologram laminate 10 of the present invention that has been irradiated with light from the point light source B, a cross-shaped optical image Y that appears due to conversion of incident light. And the print information X drawn on the transparent print layer 2 can be viewed at the same time.

  According to the present invention, when the transparent printing layer is arranged so as to overlap at least a part of the hologram area in the hologram layer, only the printing information drawn on the transparent printing layer is obtained when there is no light irradiation from the point light source. On the other hand, when receiving light irradiation from a point light source, it is possible to simultaneously display the light image expressed in the hologram region and the printing information of the transparent printing layer. Thus, it can be set as the hologram laminated body which has various design property with the presence or absence of a point light source.

The hologram laminate of the present invention has at least a hologram layer and a transparent printing layer.
Hereinafter, each member of the hologram laminate of the present invention will be described.

1. Transparent printing layer First, the transparent printing layer in this invention is demonstrated. The transparent printed layer in the present invention is disposed so as to overlap at least a part of the transmission type Fourier transform hologram region.

Here, “transparent” in the transparent printed layer includes “semi-transparent”, but means that the transparent printed layer has transparency capable of transmitting light from a point light source. Among these, it is preferable to have transparency that can clearly display the optical image expressed on the hologram region and the printing information of the transparent printing layer.
Specifically, the total light transmittance in the visible light region of the transparent printing layer is preferably in the range of 10% to 90%, and in particular, the range of 30% to 80% is preferable. What is in the range of% -70% is preferable. If the total light transmittance of the transparent printing layer is higher than the above range, the printing information of the transparent printing layer may be difficult to be visually recognized. On the other hand, if the total light transmittance is lower than the above range, an optical image expressed on the hologram area may be generated. It may be difficult to see. In addition, the said total light transmittance shall be the value measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).
Further, the transmittance at a wavelength showing the maximum value of the spectral transmittance in the visible light region of the transparent printing layer is preferably 20% or more, more preferably 40% or more, and particularly preferably 60% or more. Those are preferred. This is because the optical image expressed on the hologram area is easily visible. The spectral transmittance is a value measured according to JIS R 3106: 1998 (Chapter 4 of test methods for transmittance, reflectance, emissivity, and solar heat gain of plate glass).

  In addition, the haze value of the transparent printing layer is preferably 30% or less, more preferably 20% or less, and particularly preferably 10% or less. When the haze value of the transparent printing layer is larger than the above range, the light transmission of the point light source may be hindered and the optical image may be difficult to be visually recognized on the hologram area. The haze value of the transparent printing layer is a value measured according to JIS K7136.

  The transparent printing layer is composed of an ink that can have the above-described optical characteristics (hereinafter sometimes referred to as transparent ink). The transparent ink is not particularly limited as long as it has desired optical characteristics. For example, a colorless transparent varnish or ink varnish, a transparent medium, and the like are added with an amount of a colorant capable of exhibiting the optical characteristics described above. And a transparent chromatic color ink. Among them, it is preferable that the transparent ink is obtained by adding an appropriate amount of a colorant to the transparent medium. The type of the transparent ink is appropriately selected according to the ink composition, such as an ultraviolet curable type, an oxidation polymerization type, a permeation type, a superheat drying type, and an evaporation drying type.

  As the transparent medium, a resin or the like usually used for printing ink can be used. Examples thereof include acrylic resins, polyurethane resins, polyester resins, fluorine resins, silicone resins, epoxy resins, polyolefin resins, melamine resins, vinyl chloride-vinyl acetate copolymers, and the like. These may be used alone or in combination of two or more. Examples of such a commercially available transparent medium include ACT800 manufactured by Seiko Advance.

  The colorant can be arbitrarily selected from known colorants used in printing inks such as color filters. Examples thereof include pigments such as inorganic pigments and organic pigments, acid dyes, direct dyes, disperse dyes, oil-soluble dyes, metal-containing oil-soluble dyes, and dyes such as sublimable dyes. Among them, in the present invention, a dye is preferable because of excellent transparency, and an oil-soluble dye is particularly preferable.

The oil-soluble dye is not particularly limited as long as it is generally used for oil-based inks. For example, diarylmethane, triarylmethane, thiazole, methine, azomethine, xanthine, oxazine, azo In addition, various oil-soluble dyes such as azo derivatives, anthraquinone derivatives, quinophthalone derivatives, spirodipyrans, isodolinosviropyrans, fluorans, and metal complex salts can be used. These may be used alone or in combination of two or more.
For example, in terms of a color index, yellow dyes include C.I. I. Disperse yellow 7, 3, 23, 51, 54, 60, 79, 141; C.I. I. Solvent Yellow 2, 6, 14, 15, 16, 19, 21, 29, 61, 66, 80, 105 and the like. Examples of magenta dyes include C.I. I. Disperse thread 1, 59, 60, 73, 135, 146, 167; C.I. I. Solvent Red 3, 8, 18, 19, 23, 24, 25, 49, 81, 82, 83, 84, 109, 121, 132, 135, 143, 146, 182 and the like. Examples of cyan dyes include C.I. I. D. Sparse Blue 14, 19, 24, 26, 56, 72, 87, 154, 165, 287, 301, 334, 359; I. Solvent blue 11, 12, 25, 35, 36, 49, 50, 55, 63, 70, 73, 97, 105, 111 etc. are mentioned. In addition, you may use oil-soluble dyes other than the color and color index which were mentioned above. Examples of the above-mentioned commercially available oil-soluble dyes include Yellow GRLH special, Yellow 3RH special, Orange GRH conc. Of Aizen Spiron series manufactured by Hodogaya Chemical Co., Ltd. special, Orange 2RH special, Red GEH, Red GEH special, Red GFH special, Red GRLH special, Red BEH special, Violet RH special, Blue GNH, Blue 2BNH, Green 3GNH special, Black RLH special, Black BH special, Black MH special Etc.

  In addition, when using an oil-soluble dye as the colorant, water-soluble dyes, other dyes such as disperse dyes, and other colorants such as pigments are used in combination as long as the amount does not affect the optical properties of the transparent printing layer. You can also

  The addition amount of the colorant in the transparent ink may be an amount that allows the transparent printing layer to have the optical characteristics described above, and is, for example, 1 part by weight or less with respect to 100 parts by weight of the transparent medium. Among them, it is preferable that the content be in the range of 0.01 to 0.5 parts by weight, particularly 0.02 to 0.2 parts by weight. If the amount of the colorant added to the transparent ink is larger than the above range, the transparent printed layer cannot have the desired optical characteristics, and the light transmission of the point light source is hindered so that an optical image is visually recognized on the hologram area. It may be difficult.

  The transparent ink may contain various additives such as a photopolymerization initiator, a plasticizer, a stabilizer, a deterioration inhibitor, and an antifoaming agent. In addition, the said additive may be previously contained in the transparent medium etc., and may be added separately.

  Moreover, the said transparent ink may contain a flame retardant from the point that the hologram laminated body of this invention can be used also in the use as which flame retardance is calculated | required, such as a vehicle. Examples of the flame retardant include any flame retardant such as phosphorus flame retardant, nitrogen flame retardant, metal salt flame retardant, hydroxide flame retardant, antimony flame retardant and the like, and silicone flame retardant. A flame retardant can be used. In addition, as content of the flame retardant in the said transparent printing layer, what is necessary is just the quantity which the transparent printing layer does not impair the optical characteristic mentioned above, and can be set suitably.

  It does not specifically limit as a film thickness of the said transparent printing layer, For example, it can be set as about 0.1 micrometer-50 micrometers.

  Although the said transparent printing layer has designability, it is preferable to have printing information different from the optical image expressed in the hologram area of a hologram layer especially. The printing information in the transparent printing layer is not particularly limited, for example, various characters such as characters, symbols, marks, illustrations, characters, etc., company name, product name, sales point, catch phrase, handling explanation, etc. Character information can be listed.

  The transparent printing layer in this invention should just be arrange | positioned so that it may overlap with at least one part of the hologram area | region of a hologram layer, and the number may be one and may be plural. When there are a plurality of transparent print layers, the print information in each transparent print layer may be the same or different information. Further, it may be disposed so as to overlap the entire surface of the hologram region, and may be disposed on the entire surface of the hologram layer.

  The arrangement position of the transparent printing layer may be the uneven surface side in the hologram region, or may be the surface side opposite to the surface having the uneven shape, but the surface side opposite to the surface having the uneven shape It is preferable to arrange | position. If a transparent printing layer is provided on the uneven surface, the refractive index difference caused by the uneven shape may change, and an optical image may not be expressed in the hologram region in response to light irradiation from a point light source. In addition, when providing a transparent printing layer in an uneven | corrugated shaped surface, it is preferable to provide the said transparent printing layer following an uneven | corrugated shape so that the refractive index difference of a hologram area may not change.

2. Hologram Layer Next, the hologram layer in the present invention will be described. The hologram layer in the present invention has a transmission type Fourier transform hologram region that converts light incident from a point light source into a desired optical image.

  The hologram layer functions as a Fourier transform lens, which converts light incident from a point light source into a desired optical image due to the difference in height of the uneven shape on the surface of the hologram region. With such a function, light incident from an arbitrary point light source is diffracted in a plurality of predetermined directions, and a predetermined image is formed as an optical image. The above function may be referred to as a “Fourier transform lens function”.

Here, in the present invention, the uneven shape on the surface of the hologram region means that a multi-valued Fourier transform image formed based on image data of an original image to be displayed as a light image is in a vertical and horizontal direction to a desired range. This corresponds to the pattern of the Fourier transform image when a plurality are arranged.
In the present invention, the hologram area may be a single hologram area 1a ₁ (hereinafter sometimes referred to as a single hologram area) as shown in FIG. As shown in FIG. 3B, a hologram area 1a ₂ (hereinafter sometimes referred to as a large-format hologram area) in which a plurality of single hologram areas 1a ₁ are arranged and enlarged is also acceptable. In addition, Y in FIG. 3 is an optical image that is expressed in a single or large format hologram region.
In the present invention, the hologram region is preferably a large hologram region. When the hologram forming layer of the present invention is used for an advertising medium, a decorative member, or the like, an optical image can be enlarged and displayed by having a large hologram region, and visibility can be improved.

  In the hologram region, the wavelength of the point light source capable of exhibiting the above-described Fourier transform lens function is not particularly limited, and a desired wavelength can be targeted. Further, the wavelength of the point light source is not limited to monochromatic light of one wavelength, but may be light including multiple wavelengths, and may be white light.

The material constituting the hologram layer is not particularly limited as long as it can form an uneven shape for exhibiting the above-described Fourier transform lens function in the hologram region and exhibits a predetermined refractive index. The refractive index of the material of the hologram layer is not particularly limited, and can be appropriately set according to the use of the hologram laminate of the present invention.
Moreover, the wavelength used as the reference | standard of the said refractive index is not specifically limited, What is necessary is just to select suitably from the range of 400 nm-750 nm. In particular, in the present invention, the refractive index at a wavelength of 555 nm is preferably in the range of 1.3 to 2.0, and particularly preferably in the range of 1.33 to 1.8. Here, the refractive index can be measured by a spectroscopic ellipsometer.

  As the material of the hologram layer, a resin material conventionally used for forming a relief hologram or the like, for example, a thermosetting resin, a thermoplastic resin, an ultraviolet curable resin, an ionizing radiation curable resin, or the like can be used. .

  Examples of the thermosetting resin include unsaturated polyester resins, acrylic modified urethane resins, epoxy modified acrylic resins, epoxy modified unsaturated polyester resins, alkyd resins, and phenol resins. Examples of the thermoplastic resin include acrylate resin, acrylamide resin, nitrocellulose resin, polystyrene resin, and the like. These resins may be homopolymers or copolymers composed of two or more components. Moreover, these resin may be used independently and may use 2 or more types together.

  The thermosetting resin or thermoplastic resin described above includes various isocyanate compounds, metal soaps such as cobalt naphthenate and zinc naphthenate, organic peroxides such as benzoyl peroxide and methyl ethyl ketone peroxide, benzophenone, acetophenone, anthraquinone, naphthoquinone, A thermal or ultraviolet curing agent such as azobisisobutyronitrile or diphenyl sulfide may be included.

  Examples of the ionizing radiation curable resin include epoxy-modified acrylate resins, urethane-modified acrylate resins, acrylic-modified polyester resins, and the like. Among them, urethane-modified acrylate resins are preferable, and particularly shown in Japanese Patent Application Laid-Open No. 2007-017643. A urethane-modified acrylic resin represented by the following chemical formula is preferred.

  When the ionizing radiation curable resin is cured, a monofunctional or polyfunctional monomer, oligomer, or the like can be used in combination for the purpose of adjusting the cross-linked structure and viscosity. Examples of the monofunctional monomer include mono (meth) acrylates such as tetrahydrofurfuryl (meth) acrylate, hydroxyethyl (meth) acrylate, vinylpyrrolidone, (meth) acryloyloxyethyl succinate, and (meth) acryloyloxyethyl phthalate. Etc. In addition, as a bifunctional or higher functional monomer, classified by a skeleton structure, polyol (meth) acrylate (for example, epoxy-modified polyol (meth) acrylate, lactone-modified polyol (meth) acrylate, etc.), polyester (meth) acrylate, epoxy ( Examples include (meth) acrylate, urethane (meth) acrylate, and other polybutadiene-based, isocyanuric acid-based, hydantoin-based, melamine-based, phosphoric acid-based, imide-based, and phosphazene-based poly (meth) acrylates. Furthermore, various monomers, oligomers, and polymers that are ultraviolet and electron beam curable can be used.

  More specifically, examples of the bifunctional monomer and oligomer include polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and 1,6-hexanediol di (meth). An acrylate etc. are mentioned. Examples of the trifunctional monomer, oligomer, and polymer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, and aliphatic tri (meth) acrylate. Examples of tetrafunctional monomers and oligomers include pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, and aliphatic tetra (meth) acrylate. Examples of pentafunctional or higher functional monomers and oligomers include dipentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate. Moreover, the (meth) acrylate etc. which have a polyester frame | skeleton, a urethane frame | skeleton, and a phosphazene frame | skeleton are mentioned. The number of functional groups is not particularly limited, but if the number of functional groups is less than 3, the heat resistance tends to decrease, and if it exceeds 20, the flexibility tends to decrease. The thing within the range of 3-20 is preferable.

  The content of the monofunctional or polyfunctional monomer and oligomer as described above can be appropriately adjusted, but it is usually preferably 50 parts by weight or less with respect to 100 parts by weight of the ionizing radiation curable resin. The range of 0.5 to 20 parts by weight is preferable.

  In addition, the hologram layer is filled with a photopolymerization initiator, a polymerization inhibitor, a deterioration inhibitor, a plasticizer, a lubricant, a colorant such as a dye or a pigment, an extender pigment or a resin for increasing an amount or preventing blocking, if necessary. You may add suitably additives, such as an agent, surfactant, an antifoamer, a leveling agent, and a thixotropy imparting agent.

The film thickness of the hologram layer is preferably in the range of 0.05 mm to 5 mm, more preferably in the range of 0.1 mm to 3 mm, when the hologram layer has self-supporting properties. On the other hand, when the hologram layer does not have a self-supporting property and is formed on a transparent substrate to be described later, the film thickness of the hologram layer is preferably within a range of 0.1 μm to 50 μm, particularly 2 μm to 20 μm. It is preferable to be within the range.
Further, the size and the like of the hologram layer can be appropriately set according to the use of the hologram laminate of the present invention.

The hologram layer in the present invention has at least a hologram area, but may have an area (non-hologram area) in which an uneven shape is not formed in addition to the hologram area. This is because in the non-hologram region, another design that does not require a point light source such as a transparent printed layer can be added.
The proportion of each region in the hologram layer is not particularly limited and can be appropriately selected depending on the application.

  Note that the hologram layer in the present invention is usually a mode in which the surface of the hologram region as described above is provided with a concavo-convex shape, that is, a surface phase type, but can convert light incident from a point light source into a desired optical image. Any other embodiment may be used as long as it has a simple hologram region. As other embodiments, for example, an internal phase type having a refractive index distribution inside the hologram layer corresponding to the hologram region, an amplitude type having a transmittance distribution in the hologram region, and the like can be cited.

3. Arbitrary member The hologram laminated body of this invention may have arbitrary members other than the hologram layer and transparent printing layer which were mentioned above.
Hereinafter, arbitrary members assumed in the present invention will be described.

(1) Transparent base material The hologram laminate of the present invention may have a transparent base material on the surface of the hologram layer opposite to the surface having the irregular shape in the hologram region. It is because the thermal or mechanical strength of the hologram laminate of the present invention can be increased by having a transparent substrate.

Here, “having a transparent substrate on the side of the hologram layer opposite to the surface having the concavo-convex shape in the hologram region” may be an embodiment having a transparent substrate directly on the hologram layer. Further, the transparent substrate may be provided through another layer on the hologram layer. That is, as shown in FIG. 4 (a), the transparent substrate 3 may be directly provided between the hologram layer 1 and the transparent printing layer 2, and as shown in FIG. 4 (b), You may have the transparent base material 3 on the surface which has the transparent printing layer 2 of the hologram layer 1. FIG. In the case of FIG. 4B, an adhesive may be interposed between the hologram layer 1 and the transparent printing layer 2 and the transparent substrate 3. The composition of the adhesive can be the same as the material described in the section “(2) Adhesive layer” described later.
Moreover, although not shown in figure, when a transparent printing layer is located on the uneven | corrugated shaped surface of a hologram area | region, you may have a transparent base material on the surface opposite to the surface which has a transparent printing layer of a hologram layer.

  The transparent substrate preferably has a transmittance in the visible light region (hereinafter sometimes referred to as a light transmittance) of 80% or more, and more preferably 90% or more. By setting the light transmittance of the transparent substrate within the above-mentioned range, light can be sufficiently transmitted to the transparent printing layer and the hologram layer, and the optical image expressed in the hologram region and the printing information of the transparent printing layer can be obtained. It is because it becomes easy to visually recognize. In addition, let the light transmittance of the said transparent base material be the value measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).

  Moreover, the said transparent base material is so preferable that a haze value is low, Specifically, the thing whose haze value is in the range of 0.01%-5% is preferable, and in particular within the range of 0.01%-3%. Some are preferred, especially those in the range of 0.01% to 1.5%. This is because, by setting the haze value of the transparent substrate within the above range, it is possible to display the optical image that appears in the hologram region and the printing information in the transparent printing layer without impairing the visibility. In addition, the haze value of the said transparent base material shall be the value measured based on JISK7136.

  The material for the transparent substrate is not particularly limited as long as it exhibits the above light transmittance and haze value. For example, polyethylene terephthalate, polycarbonate, acrylic resin, cycloolefin resin, polyester resin, polystyrene resin, Resin films such as acrylic styrene resin, quartz glass, Pyrex (registered trademark), and synthetic quartz plates can be used. Among these, as the transparent substrate, it is preferable to use a resin film from the viewpoint of light weight and less risk of breakage and the like, and polycarbonate is optimal from the viewpoint of birefringence.

  The transparent substrate may contain a flame retardant. This is because the hologram laminate of the present invention can also be used in applications that require flame retardancy such as vehicles. About the kind of said flame retardant, since it is the same as the material demonstrated by the term of "1. Transparent printed layer" mentioned above, description here is abbreviate | omitted. In addition, about the addition amount of a flame retardant, what is necessary is just the quantity which the said transparent base material can show desired light transmittance and a haze value, and can be set suitably.

  Moreover, the said transparent base material may contain a ultraviolet absorber, a heat ray absorber, etc. This is because deterioration of the hologram layer caused by exposure to ultraviolet rays and heat rays is suppressed, and the hologram laminate of the present invention can be used as an ultraviolet absorption filter, a heat ray cut filter, or the like.

  The film thickness of the transparent substrate may be any thickness that can provide rigidity and strength for supporting the hologram layer and the like, and is preferably about 0.005 mm to 5 mm, for example. It is preferably within a range of 02 mm to 1 mm. Further, the shape of the transparent substrate is not particularly limited, and can be appropriately selected according to the usage form of the hologram laminate of the present invention.

  In order to improve the adhesiveness with the other layers, for example, the surface of the transparent substrate may be subjected to corona treatment or the like.

(2) Adhesive layer The hologram laminate of the present invention may have an adhesive layer on the surface of the hologram layer opposite to the surface having the irregular shape in the hologram region. This is because by having an adhesive layer, the hologram laminate can be used as an advertising medium or a decorative member by being bonded to a desired member such as a window glass.

Here, “having the adhesive layer on the surface opposite to the surface having the irregular shape in the hologram region” means that the transparent printing layer 2 of the hologram layer 1 is formed as shown in FIG. The adhesive layer 4 may be formed on the surface, and the hologram layer 1 is formed on the transparent substrate 3 as shown in FIG. The adhesive layer 4 may be formed on the surface on which the print layer 2 is formed.
Moreover, although not shown in figure, when a transparent printing layer is located on the uneven | corrugated shaped surface of a hologram area, the contact bonding layer may be formed on the surface opposite to the surface which has a transparent printing layer of a hologram layer.

  The adhesive layer preferably has high transparency. Specifically, the transmittance (light transmittance) in the visible light region is preferably 80% or more, and more preferably 90% or more. This is because, by setting the light transmittance of the adhesive layer in the above-described range, it is possible to display without impairing the visibility of the light image appearing in the hologram region and the print information in the transparent print layer. In addition, let the light transmittance of the said contact bonding layer be the value measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).

  The adhesive layer preferably has a low haze value. Specifically, the haze value is preferably in the range of 0.01% to 5%, and more preferably in the range of 0.01% to 3%. In particular, those in the range of 0.01% to 1.5% are preferred. Thereby, even if it has the said contact bonding layer, it is because a display is possible, without inhibiting the visibility of the optical image expressed in a hologram area, and the printing information in a transparent printing layer. In addition, let the haze value of the said contact bonding layer be the value measured based on JISK7136.

The adhesive layer may be a pressure-sensitive adhesive layer, or a re-peeling adhesive layer having both adhesive properties and re-peeling properties. When the adhesive layer is an adhesive layer, the hologram laminate of the present invention can be firmly attached to a desired member, and the hologram laminate can be hardly peeled off from the adherend.
Further, when the adhesive layer is a re-peeling adhesive layer, the hologram laminate of the present invention is bonded to a desired member by adhering so that air does not enter between the re-peeling adhesive layer and the adherend. Can do. Such a re-peeling adhesion layer can easily perform adhesion and peeling repeatedly without leaving a mark due to an adhesive or the like on the adherend, and can suppress damage to the adherend.

  When the adhesive layer is an adhesive layer, examples of the resin used for the adhesive layer include acrylic resins, ester resins, urethane resins, ethylene vinyl acetate resins, latex resins, epoxy resins, and polyurethane ester resins. Examples thereof include resins, or fluorine resins such as vinylidene fluoride resin (PVDF) and vinyl fluoride resin (PVF), and polyimide resins such as polyimide, polyamideimide, and polyetherimide. Among these, acrylic resins, urethane resins, ethylene vinyl acetate resins, and latex resins are preferable.

  When the adhesive layer is a re-peeling adhesive layer, examples of the resin used for the re-peeling adhesive layer include acrylic resins, acrylic ester resins, copolymers thereof, styrene-butadiene copolymers, Examples include natural rubber, casein, gelatin, rosin ester, terpene resin, phenolic resin, styrene resin, coumarone indene resin, polyvinyl ether, and silicone resin. Of these, acrylic resins and silicone resins are preferable. This is because the acrylic resin can be bonded even when the surface of the adherend has some unevenness. In addition, the silicone resin is less likely to decrease in adhesive strength even when adhesion and peeling are repeated.

  The adhesive layer may contain an ultraviolet absorber or an infrared absorber as necessary. By containing an ultraviolet absorber or an infrared absorber in the adhesive layer, the hologram laminate of the present invention can be prevented from being deteriorated by irradiation with ultraviolet rays or infrared rays.

  The ultraviolet absorber used in the adhesive layer is not particularly limited as long as it can absorb light in the ultraviolet region, and specifically, a benzotriazole ultraviolet absorber, a triazine ultraviolet absorber, Benzophenone UV absorbers, benzoate UV absorbers, liquid UV absorbers, polymer UV absorbers, anionic water-soluble polymer UV absorbers, cationic water-soluble polymer UV absorbers, nonionic water-soluble polymers An ultraviolet absorber etc. can be mentioned. Among these, from the viewpoint of durability, it is preferable to use a benzotriazole-based or cyclic iminoester-based ultraviolet absorber. These ultraviolet absorbers can be used alone or in admixture of two or more. Further, when two or more kinds of ultraviolet absorbers are used in combination, ultraviolet rays having different wavelengths can be absorbed simultaneously, so that a high ultraviolet absorption effect can be achieved.

  The addition amount of the ultraviolet absorber is appropriately selected according to the use of the hologram laminate of the present invention, but is usually contained in the solid content of the adhesive layer from about 0.1% by mass to 20% by mass. In particular, it is preferably contained in an amount of about 0.5 to 15% by mass. If the addition amount of the ultraviolet absorber is less than the above range, the ultraviolet absorption effect is small and the hologram laminate may be deteriorated by ultraviolet rays. On the other hand, if the addition amount is more than the above range, the adhesive layer may turn yellow. This is because the film formability of the adhesive layer may be lowered.

  Moreover, as an infrared absorber used for the said contact bonding layer, if the material absorbs the wavelength light of an infrared region, the kind etc. will not be specifically limited. Examples of such infrared absorbers include tin oxide, indium oxide, magnesium oxide, titanium oxide, chromium oxide, zirconium oxide, nickel oxide, aluminum oxide, zinc oxide, iron oxide, antimony oxide, lead oxide, and bismuth oxide. Inorganic infrared absorbers, cyanine compounds, phthalocyanine compounds, naphthalocyanine compounds, naphthoquinone compounds, anthraquinone compounds, aluminum compounds, pyrylium compounds, cerium compounds, squarylium compounds, diimoniums, copper complexes, Organic infrared absorbers such as nickel complexes and dithiol-based complexes are listed. These infrared absorbers can be used alone or in combination of two or more.

  The addition amount of the infrared absorber is appropriately selected depending on the infrared absorbing ability required for the adhesive layer, but is usually about 0.1% by mass to 20% by mass in the solid content in the adhesive layer, and in particular, about 0. It is preferable to contain about 5 mass%-15 mass%.

Moreover, the said adhesive layer may contain the flame retardant from the point that the hologram laminated body of this invention can be used also in the use as which flame retardance is calculated | required, such as a vehicle. About the kind of said flame retardant, since it can be made to be the same as that of the material demonstrated by the term of "1. Transparent printing layer" mentioned above, description here is abbreviate | omitted. In addition, about the addition amount of a flame retardant, the said contact bonding layer can have desired light transmittance and a haze value, and can be suitably set to such an extent that adhesive force does not fall.
Furthermore, the said adhesive layer may contain additives, such as a tackifier and a tackifier, as needed.

  The thickness of the adhesive layer is appropriately selected according to the type and use of the hologram laminate of the present invention, but is usually preferably in the range of 1 μm to 500 μm, and more preferably in the range of 2 μm to 50 μm. It is preferable. If the thickness of the adhesive layer is larger than the above range, it may not have the optical characteristics described above, and the visibility of the optical image that appears in the hologram region and the display of print information in the transparent print layer may be hindered. Because there is.

  The peel strength when the adhesive layer is a re-peeling adhesive layer is preferably within a range of 10 g / 25 mm to 1000 g / 25 mm, particularly 50 g / 25 mm to 500 g / 25 mm with respect to the adherend. It is preferable to be within the range. This is because if the peel strength is less than the above range, the hologram laminate may be easily peeled off from the adherend by an external force. If the peel strength exceeds the above range, when the hologram laminate of the present invention is peeled from the adherend, a part of the re-peeling adhesion layer may remain on the adherend without being peeled off. .

(3) Print layer The hologram laminate of the present invention may have a print layer. The “printing layer” here is a layer on which information is printed using ink or the like, but it does not satisfy the optical characteristics shown by the transparent printing layer described above.
By having the printing layer, it is possible to have information different from the information of the hologram layer and the transparent printing layer, and the design of the hologram laminate of the present invention can be further improved.

The material of the printing layer is not particularly limited as long as it can be printed by various printing methods. For example, polycarbonates, polyesters, cellulose derivatives, norbornene resins, polyvinyl chlorides, polyvinyl acetate. , Acrylic resins, urethane resins, polypropylenes, polyethylenes, styrenes and the like. As a method for forming the print layer, a method similar to a general method for forming a resin layer can be used.
Moreover, as an ink used for the said printing layer, the ink normally used for various printing methods, such as inkjet printing, screen printing, offset printing, gravure printing, flexographic printing, can be used.

  The print layer preferably has print information different from the optical image expressed in the hologram region in the hologram layer and the print information displayed by the transparent print layer. Examples of print information in the print layer are the same as those described in the section “1. Transparent print layer”.

  The print layer may be formed on a transparent substrate or a hologram layer. In addition, the printing layer is usually formed at a position that does not overlap the hologram area and the transparent printing layer so as not to hinder the visibility of the optical image expressed on the hologram area and the printing information of the transparent printing layer. Although it is preferable, it may be formed in the hologram region as long as it does not overlap the optical image and the print information. When a print layer is formed in the hologram area, a portion overlapping the print layer becomes a non-hologram area.

(4) Release layer Moreover, as for the hologram laminated body of this invention, the release layer may be arrange | positioned on the contact bonding layer mentioned above. Immediately before the hologram laminate of the present invention is bonded to a desired adherend, the release layer and the adhesive layer can be peeled off and used. Thereby, it can prevent that a foreign material adheres between a contact bonding layer and a to-be-adhered body.

The release layer is not particularly limited as long as it can protect the adhesive layer and can be easily peeled off from the adhesive layer. As such a release layer, for example, a layer made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), or the like can be used.
The thickness of the release layer is appropriately selected according to the type and application of the hologram laminate of the present invention.

  Further, the surface of the release layer that is in contact with the adhesive layer is preferably subjected to a peeling treatment in order to facilitate the peeling operation with the adhesive layer. Examples of such treatment methods include silicone treatment and alkyd treatment, but are not particularly limited.

(5) Arbitrary member Furthermore, the hologram laminate of the present invention may have an ultraviolet absorbing layer, an infrared absorbing layer, an antireflection layer, or the like on the transparent substrate or a non-hologram region of the hologram layer. . By having such a layer, the hologram laminate can be provided with an ultraviolet absorption function, an infrared absorption function, an antireflection function, and the like, and the hologram laminate of the present invention can be used as various filters. Become.
In addition, about these ultraviolet absorption layers, an infrared absorption layer, an antireflection layer, etc., since it can be set as the thing used generally, description here is abbreviate | omitted.

4). Hologram Laminate In the hologram laminate of the present invention, the transparent print layer can be made to function as a wavelength filter by disposing the transparent print layer so as to overlap at least a part of the hologram region. This is because the light image that appears on the hologram area by light irradiation from a point light source usually exhibits a rainbow color when the incident light is dispersed, but the hologram area and the transparent printing layer overlap. Thus, an optical image exhibiting the color of the transparent printing layer can be expressed. In addition, since the optical image that appears at this time has a clearer outline than the optical image that is expressed without passing through the transparent printing layer, the optical image is more visible.

  Moreover, in the hologram laminated body of this invention, it is preferable that the magnitude | size of the optical image expressed is smaller than the printing information of the transparent printing layer displayed. Especially, it is preferable that the optical image is expressed in the displayed print information. This is because print information and an optical image are combined to provide a hologram laminate having various design properties.

  The hologram laminate of the present invention may have two or more different hologram regions. For example, two different types of original images are used, and a first hologram region having an uneven shape corresponding to the Fourier transform image of one original image and a second hologram region corresponding to the Fourier transform image of the other original image are included. May be. In such a hologram laminate, by receiving light from a point light source, an optical image corresponding to the original image information in the first hologram region and an optical image corresponding to the original image information in the second hologram region Can be expressed separately according to the position from the point light source.

5. Production Method The production method of the hologram laminate of the present invention is not particularly limited as long as it can form a transparent printing layer on a hologram layer having a hologram region so as to overlap at least a part of the hologram region.
For example, the hologram lamination of the present invention includes a hologram layer forming step of forming a hologram layer having a hologram region, a transparent printing layer forming step of forming a transparent printing layer so as to overlap at least a part of the hologram region, and the like. The body can be manufactured.
Hereinafter, each step will be described.

(1) Hologram layer forming step The method for forming a hologram layer is not particularly limited as long as it can form a hologram layer having at least a hologram region. As a method for forming such a hologram layer, for example, a method using a master master for hologram layer (hereinafter sometimes abbreviated as “master master”) (first embodiment and second embodiment), the above master master is used. Although the method (3rd Embodiment) etc. which are not used are mentioned, it is not limited to this.
Each embodiment will be described below.

(A) First Embodiment In the first embodiment of the hologram layer forming step, a stamper is formed from a master original plate, and the hologram layer is formed using the stamper.

(I) Preparation of Master Master Plate for Hologram Layer The preparation method of the master master plate is not particularly limited, but can be manufactured by, for example, the method described below.
First, an original picture to be drawn in the hologram area of the hologram layer is created, and a Fourier transform image of the original picture is created by calculation such as FFT with a computer. At this time, the Fourier transform image is a Fourier transform image that is multi-valued into two or more values. Next, an electron beam drawing exposure or mask exposure is applied to a laminate of a metal layer such as chromium and a photoresist on a substrate to form a latent image of a concavo-convex pattern on the photoresist, and the latent image of the photoresist is formed. Develop positively. Next, the metal layer is etched by the first wet etching in accordance with the photoresist pattern to remove excess metal, and then the substrate is etched to a predetermined depth by the first dry etching to be removed. Strip the remaining photoresist.
Next, a photoresist is applied again on the entire surface, and development is performed by performing electron beam drawing exposure, mask exposure, or the like. Subsequently, the metal layer is etched by the second wet etching in accordance with the pattern of the photoresist, and the substrate is etched by the second dry etching. At this time, etching is performed by a depth that is half of the first etching amount. Finally, the remaining photoresist is peeled off and the remaining metal layer is completely removed to obtain a master original plate.

(Ii) Formation of Hologram Layer The stamper used in the present embodiment can be formed by, for example, depositing a conductive film on the master original plate, performing nickel plating (electroforming), and peeling off the master original plate.

  A single hologram region can be formed by performing a press stamp once on the coating film made of the material of the hologram layer using the stamper and transferring the uneven pattern of the stamper. At this time, it is also possible to apply a stamp by applying the hologram layer material on the transparent substrate. In addition, after the first press stamp, the coating film is transported and stopped by the width of the stamper, a new stamp is performed, and the coating film is transported and stopped by the width of the stamper again to repeat the process to a desired size. A hologram layer having a large hologram region can be formed.

(B) Second Embodiment In a second embodiment of the hologram layer forming step, a hologram master is used to form a hologram layer replica master (hereinafter referred to as replica plate), and the replica plate is made into a roller to form a hologram. The layer is formed.
Since the preparation method of the master original plate is the same as “(a) First embodiment” described above, the description thereof is omitted here.

The replica plate used in the present embodiment is, for example, an ultraviolet curable resin is applied to the master original plate, and the ultraviolet curable resin is cured by irradiating ultraviolet rays in a state where the replica plate substrate is pressed thereon, It can be formed by peeling the master original plate. As the replica plate substrate, a PET film or a polycarbonate film is suitable.
By arranging the replica plate with no gap around the embossing roller, an embossing roller having a plurality of replica plates on the surface can be obtained.

  When the transparent substrate coated with the hologram layer material is sandwiched between the obtained embossing roller and another roller provided thereunder, and the embossing roller is rotated, a replica plate is formed on the coating film made of the hologram layer material. The concavo-convex pattern is conveyed while being transferred. Then, the hologram layer which has a large-sized hologram area of a desired magnitude | size can be formed by hardening | curing the said coating film by ultraviolet irradiation downstream of a conveyance line. When the replica plate is placed around the embossing roller, a fixed interval is provided, and pattern transfer and curing by ultraviolet irradiation are performed on the coating film made of the material of the hologram forming layer in the same manner as described above. After that, the hologram layer having a single hologram region can be formed by cutting at intervals.

(C) Third Embodiment A third embodiment of the hologram layer forming step is a method (step-and-repeat method) for forming a hologram layer without using a master original plate.
In the present embodiment, first, a Fourier transform image is created by the same method as in “(a) First embodiment (i) Preparation of master master for hologram layer” described above. Next, a large substrate coated with a metal layer and a photoresist is prepared, and the large substrate is subjected to electron beam drawing exposure, mask exposure, and the like to form a latent image of an uneven pattern on the photoresist. Next, the large substrate is transported by the width of the Fourier transform image, and the large substrate is again subjected to electron beam drawing exposure or mask exposure to form a latent image of the uneven pattern on the photoresist, and the large substrate is Fourier transformed. Stop feeding for the width of the image. Repeat the above operation and finally develop.

  Next, the first wet etching, the first dry etching, and the second time are performed on the large substrate in the same procedure as the above-described “(a) First embodiment (i) Preparation of master master for hologram layer”. Wet etching and dry etching for the second time, and finally the remaining photoresist is peeled off, and all the remaining metal layers are removed, so that the desired number of single hologram regions are arranged without gaps in the vertical and horizontal directions. A large master can be obtained. A hologram layer having a large-sized hologram region of a desired size is obtained by performing press stamping in the same manner as described in “(a) First embodiment (ii) Formation of hologram layer” by using the large original plate. Can be formed. The large original plate can also be used as a master original plate in the first and second embodiments described above.

(2) Transparent Print Layer Formation Step The method for forming the transparent print layer is not particularly limited as long as it can be formed so as to overlap with at least a part of the hologram region of the hologram layer. For example, a method in which a transparent ink is directly applied and printed on the hologram layer by various methods can be used. Moreover, when the hologram laminate of the present invention has a transparent substrate, the transparent ink is separately applied on the transparent substrate by various methods to form a transparent printed layer, and the transparent printed layer of the transparent substrate is formed. For example, a method of bonding a surface having a surface and a hologram layer through an adhesive or the like can be used.

  When printing using a transparent ink, each composition of the transparent ink may be dissolved in a solvent and used as necessary. The solvent can be appropriately selected depending on the printing method, but it is preferable to use, for example, a high boiling point solvent or a highly volatile solvent used in the oil-based ink disclosed in JP-A-2008-173980.

  The printing method used for forming the transparent printing layer is not particularly limited. For example, lithographic printing, intaglio printing, relief printing, basic printing method for stencil printing, offset printing, gravure printing, silk screen printing, flexographic printing, resin Letterpress printing, octopus printing, ink jet printing, transfer printing, electrostatic printing, ultraviolet (UV) curing printing, baking printing, waterless offset printing, and the like can be used.

(3) Other steps As a method for producing a hologram laminate of the present invention, for example, in addition to the steps described above, any step described later can be included depending on the configuration of the hologram laminate.

(A) Adhesive layer forming step When the adhesive layer is formed on the surface of the hologram layer opposite to the surface having the concavo-convex shape in the hologram region, a method for forming the adhesive layer at a desired position is used. If it is, it will not specifically limit. For example, a method in which the adhesive layer forming coating solution is directly applied on the surface of the hologram layer on which the transparent printing layer is formed or on the surface of the transparent substrate on which the transparent printing layer is formed is used. It is done. Alternatively, the adhesive layer forming coating solution may be separately applied onto the release layer and dried to form an adhesive layer, and then transferred to a desired position such as a hologram layer.

  The adhesive layer-forming coating solution can be prepared by dissolving the above-mentioned adhesive layer material in an organic solvent. The material of the adhesive layer is the same as the content described in the above-mentioned section “3. Arbitrary Member (2) Adhesive Layer”, and thus the description thereof is omitted here. The organic solvent used in the adhesive layer forming coating solution can be appropriately selected according to the material of the adhesive layer and the application method.

  The method for applying the coating liquid for forming the adhesive layer is not particularly limited. For example, a Mayer bar, gravure coat, gravure reverse coat, kiss reverse coat, three roll reverse coat, slit reverse die coat, comma coat, knife coat Various coating methods such as can be used.

(B) Print layer formation process When forming a print layer on a hologram layer, a transparent base material, etc., the formation method will not be specifically limited if desired information can be printed. As a printing method used for forming the printing layer, a general method can be used, for example, lithographic printing, intaglio printing, letterpress printing, basic printing method of stencil printing, flexographic printing, resin letterpress printing, gravure offset. Examples thereof include printing, octopus printing, inkjet printing, transfer printing, electrostatic printing, ultraviolet (UV) curable printing, baking printing, and waterless offset printing.

(C) Arbitrary process In addition to each process mentioned above, you may have a transparent base material bonding process, an ultraviolet absorption layer formation process, an infrared absorption layer formation process, an antireflection layer formation process, etc.

6). Application The application of the hologram laminate of the present invention is not particularly limited, but is suitable for an application capable of utilizing the display change in the hologram region according to the presence or absence of a point light source. For example, it can be used as an advertising medium or a decorative member by being attached to a window glass or the like.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  The following examples illustrate the present invention in more detail.

[Example]
(Hologram layer forming process)
<Preparation of master master for hologram layer (master master)>
First, an original image 21 of an optical image to be observed was created (FIG. 6 (a)). The original image was created as a bitmap image of 256 pixels wide × 256 pixels high using image creation software of a personal computer. Next, Fourier transform image data 22 was created by Fourier transforming the original picture 21 with a personal computer (FIG. 6B). At this time, the Fourier transform image data was Fourier transform image data having a quaternary phase value. The number of pixels in the Fourier transform image data is 256 pixels in the horizontal direction and 256 pixels in the vertical direction, which is the same as the number of pixels in the original image.

  Next, according to the method described in the section “(1) Hologram layer forming step (a) First embodiment” in “5. Manufacturing method” described above, a master original plate was produced by electron beam drawing exposure and etching. At this time, since the dimension of one pixel of the Fourier transform image data was 5 μm wide × 5 μm long, the dimension of the Fourier transform image was 1280 μm wide × 1280 μm long. A large master original 23 having a width of 128 mm and a height of 128 mm was obtained by forming 100 Fourier images of 100 × width of the Fourier transform image (FIG. 6C). Synthetic quartz was used for the master original substrate.

<Formation of hologram layer replication master (replica)>
A replica plate 24 was formed using the master original plate 23 in accordance with the method described in the section “(1) Hologram layer forming step (b) Second embodiment” in “5. Manufacturing method” (FIG. 6D )). The replica plate is obtained by applying a urethane-modified acrylate resin to the master plate obtained as described above, and curing the urethane-modified acrylate resin by irradiating with ultraviolet rays while pressing a PET film as a replica plate substrate on the master plate. Was formed by peeling.
An embossing roller having 25 replica plates 24 on the surface by arranging the replica plates 24 around the embossing roller so that there are five in the width direction (CD direction) and five in the circumferential direction (MD direction). 25 (FIG. 6E).

<Formation of hologram layer>
A PET film (transparent substrate) coated with urethane-modified acrylate resin as a hologram layer material is sandwiched between the embossing roller and other rollers provided below it, the embossing roller is rotated, and the UV curable resin is applied. The replica plate pattern was transferred onto the film while being transferred, and the ultraviolet curable resin was cured by ultraviolet irradiation downstream thereof. As a result, a hologram layer 1 having a large hologram region 1a _{2 in} which five single hologram regions were arranged in the CD direction and 8000 in the MD direction could be formed (FIG. 6 (f)).

(Transparent printing layer forming process)
A transparent printing layer was formed on the surface of the PET film on which the hologram layer was formed opposite to the surface on which the hologram layer was formed. The transparent printing layer is a transparent ink prepared by mixing 0.05 parts by weight of a coloring dye (Aizen Spilon Blue 2BNH, manufactured by Hodogaya Chemical Co., Ltd.) with 100 parts by weight of a transparent medium (ACT 800, manufactured by Seiko Advance). Screen printing was performed on top to form a pattern.
A hologram laminate was prepared by providing a removable adhesive layer made of silicone resin on a PET film including the transparent printing layer.

[Evaluation]
When the obtained hologram laminate was affixed to the window glass, when there was no point light source on the opposite side of the observer and the window glass, the pattern of the transparent printed layer could be visually recognized, while the point light source was In some cases, in addition to the pattern of the transparent printing layer, an optical image in which the irradiation light from the point light source was converted in the hologram region through the transparent printing layer was visually recognized.

DESCRIPTION OF SYMBOLS 1 ... Hologram layer 1a ... Transmission type Fourier-transform hologram area (hologram area)
2 ... Transparent printing layer 10 ... Hologram laminate

Claims (3)

A hologram layer having a transmissive Fourier transform hologram region for converting light incident from a point light source into a desired optical image;
A transparent printed layer disposed so as to overlap at least a part of the transmission type Fourier transform hologram region;
A hologram laminate, comprising:   2. The hologram laminate according to claim 1, further comprising a transparent substrate on a surface side of the hologram layer opposite to a surface having an uneven shape in the transmission Fourier transform hologram region.   3. The hologram laminate according to claim 1, further comprising an adhesive layer on a surface of the hologram layer opposite to the surface having the uneven shape in the transmission Fourier transform hologram region.