JP2010221542A - Latent image formation object, genuineness determining method therefor and medium using latent image formation object - Google Patents

Latent image formation object, genuineness determining method therefor and medium using latent image formation object Download PDF

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JP2010221542A
JP2010221542A JP2009071710A JP2009071710A JP2010221542A JP 2010221542 A JP2010221542 A JP 2010221542A JP 2009071710 A JP2009071710 A JP 2009071710A JP 2009071710 A JP2009071710 A JP 2009071710A JP 2010221542 A JP2010221542 A JP 2010221542A
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latent image
line
polarization
forming body
image forming
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JP5365292B2 (en
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Mihoko Nagayoshi
美保子 永吉
Kazuhiro Yashiki
一尋 屋鋪
Hideki Ochiai
英樹 落合
Akira Kubo
章 久保
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a latent image formation object which carries an image itself contrived by making a latent image using polarization technique not a simple image but a complicated image, and further difficult to forge. <P>SOLUTION: This latent image formation object has a phase difference layer, formed on a base material, which involves a polarization latent image formed of at least, parallel shade lines. In addition, the polarization latent image is constituted of a parallel shade line latent image and a parallel shade line background, and therefore, it is possible to determine the genuineness of the latent image formation object, depending on whether a polarized latent image and a parallel shade line latent image emerge or not, with the help of a verification implement capable of verifying both polarized latent image and parallel shade line latent image. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、物品の偽造防止及び真贋判定を行うための隠し文字や隠しパターンを、フィルタを用いることによって表示させることを目標とした潜像を用いた潜像形成体に関するものであり、隠し文字や隠しパターンの中にさらなる潜像を備えた潜像形成体とその検証方法に関するものである。   The present invention relates to a latent image forming body using a latent image intended to display a hidden character or a hidden pattern for performing counterfeit prevention and authenticity determination of an article by using a filter. The present invention relates to a latent image forming body having a further latent image in a hidden pattern and a method for verifying the latent image forming body.

従来から、銀行券、商品券、パスポート等の有価証券や認証媒体は、偽造防止対策として偽造の困難な媒体の貼付を行ってきた。そこでは、目視による判定(オバート機能)又は検証器を用いた判定(コバート機能)を用いて真贋判定を行っている。   Conventionally, securities such as banknotes, gift certificates, passports, and authentication media have been pasted with a medium that is difficult to forge as a countermeasure against forgery. In this case, authenticity determination is performed using visual determination (overt function) or determination using a verifier (covert function).

しかし、目視による真贋判定が行える偽造防止媒体は、施された偽造防止技術が視認されてしまうが故に、偽造防止技術に気づかれ易く、それにより偽造もされ易いという現状がある。そこで、近年は、検証器を用いた真贋判定を行う偽造防止媒体に注目が集まっており、偏光技術を用いて潜像を形成し、偏光フィルムを重ねることにより潜像を出現させて真贋判定を行う潜像形成体が出現している。   However, the anti-counterfeit medium that can be visually checked for authenticity is easily noticed by the anti-counterfeiting technology, and is therefore easily counterfeited. Therefore, in recent years, attention has been focused on anti-counterfeit media that performs authenticity determination using a verifier, and a latent image is formed by using polarization technology, and the latent image appears by overlapping polarizing films to determine authenticity. The latent image forming body to appear has appeared.

特開2000−314810号公報JP 2000-314810 A

しかしながら、偏光技術を用いて潜像を形成した潜像形成体であっても、時間の経過、技術の進歩等にともない、偽造されてしまう可能性があり、それが問題となっている。   However, even a latent image forming body in which a latent image is formed by using a polarization technique may be forged with the passage of time or technological advancement, which is a problem.

本発明は、上記問題を解決するためになされたものであり、その課題とするところは、偏光技術を用いた潜像を、単純な画像ではなく複雑な画像にする等、画像自体に工夫を凝らし、さらに偽造が困難な潜像形成体を提供することにある。   The present invention has been made to solve the above-mentioned problems, and the problem is that the image itself is devised, such as making a latent image using polarization technology into a complex image instead of a simple image. It is an object of the present invention to provide a latent image forming body that is hardened and difficult to counterfeit.

上述した課題を解決するために、本発明は、位相差層及び反射層を具備する潜像形成体であって、該位相差層は、少なくとも偏光潜像部を有し、該偏光潜像部は、万線で構成され且つ万線背景部と万線潜像部とを有し、該万線潜像部を構成する万線と、該万線背景部を構成する万線とは、万線角度、ピッチ、万線位相のいずれか1つ以上が異なることを特徴とする潜像形成体としたものである。   In order to solve the above-described problem, the present invention is a latent image forming body including a retardation layer and a reflective layer, and the retardation layer has at least a polarization latent image portion, and the polarization latent image portion. Has a line background part and a line latent image part, and the line constituting the line latent image part and the line constituting the line background part are The latent image forming body is characterized in that at least one of a line angle, a pitch, and a line phase is different.

また本発明は、前記位相差層は、さらに偏光背景部を有し、前記偏光潜像部と該偏光背景部とでは、位相差子の光軸が異なる方向に配向されていることを特徴とする前記潜像形成体としたものである。   In the invention, it is preferable that the retardation layer further includes a polarization background portion, and the polarization latent image portion and the polarization background portion are oriented in different directions in the optical axis of the phase retarder. The latent image forming body.

また本発明は、さらに基材及び粘着層を積層したことを特徴とする前記潜像形成体としたものである。   Further, the present invention provides the latent image forming body characterized in that a base material and an adhesive layer are further laminated.

また本発明は、さらに片側の最外層に粘着層を、反対側の最外層に剥離層又は剥離保護層を介して剥離基材を積層したことを特徴とする前記潜像形成体としたものである。   The present invention further provides the latent image forming body, wherein an adhesive layer is further laminated on the outermost layer on one side, and a peeling substrate is laminated on the outermost layer on the opposite side via a peeling layer or a peeling protective layer. is there.

また本発明は、前記潜像形成体に偏光シートを重ね、偏光潜像の出現の有無にて真偽判定を行うことを特徴とする潜像形成体の真偽判定方法としたものである。   In addition, the present invention provides a method for determining authenticity of a latent image forming body, comprising: superimposing a polarizing sheet on the latent image forming body and performing authenticity determination based on the presence or absence of the appearance of a polarized latent image.

また本発明は、さらに顕像化用パターンを形成してなる顕像化用シートを重ね、万線潜像の出現の有無にて真偽判定を行うことを特徴とする前記潜像形成体の真偽判定方法としたものである。   Further, the present invention provides the latent image forming body characterized in that it further determines whether the latent image is present or not by superimposing a visualization sheet formed with a visualization pattern. This is a true / false determination method.

また本発明は、前記潜像形成体に、検証デバイスを重ね、偏光潜像及び万線潜像の出現の有無にて真偽判定を行うことを特徴とする潜像形成体の真偽判定方法としたものである。   In addition, the present invention provides a method for determining authenticity of a latent image forming body, wherein a verification device is superimposed on the latent image forming body, and authenticity determination is performed based on the presence or absence of the appearance of a polarized latent image and a line latent image It is what.

また本発明は、前記検証デバイスが、偏光子で形成された前記顕像化用パターンを有することを特徴とする前記潜像形成体の真偽判定方法としたものである。   Further, the present invention is the authenticity determination method for the latent image forming body, wherein the verification device has the visualization pattern formed of a polarizer.

また本発明は、前記検証デバイスが、厚みのある透明シートを備えることを特徴とする前記潜像形成体の真偽判定方法としたものである。   Further, the present invention provides the method for determining authenticity of the latent image forming body, wherein the verification device includes a thick transparent sheet.

また本発明は、可とう性を有する支持体上に、前記潜像形成体と、偏光シート及び顕像化用パターンとを設けたことを特徴とする媒体としたものである。   The present invention also provides a medium in which the latent image forming body, a polarizing sheet, and a visualization pattern are provided on a flexible support.

また本発明は、可とう性を有する支持体上に、前記潜像形成体と、検証デバイスとを設けたことを特徴とする媒体としたものである。   The present invention also provides a medium in which the latent image forming body and the verification device are provided on a flexible support.

本発明は、以上説明したような構成であるから、以下に示す如き効果がある。   Since the present invention is configured as described above, the following effects can be obtained.

即ち、本発明の潜像形成体は位相差層を有するため、対応する偏光シートを重ねると、偏光潜像部が顕像化する。さらに偏光潜像部が万線で構成され、万線潜像部と万線背景部を有するため、顕像化用パターンが形成された顕像化用シートを重ねると、万線潜像が顕像化することにより、さらに偽造が困難で、且つ施した全ての潜像に気づかれ難い潜像形成体を提供することが可能となる。   That is, since the latent image forming body of the present invention has a retardation layer, the polarization latent image portion becomes visible when the corresponding polarizing sheets are stacked. Furthermore, since the polarization latent image portion is composed of a line, and has a line latent image portion and a line background portion, the line latent image is revealed by overlapping the visualization sheets on which the visualization pattern is formed. By forming an image, it is possible to provide a latent image forming body that is more difficult to counterfeit and is difficult to notice all the latent images applied.

本発明における潜像形成体の一実施形態例を示す概要図である。It is a schematic diagram showing an embodiment of a latent image forming body in the present invention. 本発明の潜像形成体に偏光シートを重ねた際の光の進路を示した概略図である。It is the schematic which showed the course of the light at the time of overlapping a polarizing sheet on the latent image formation body of this invention. 本発明の潜像形成体に偏光シートを重ねた際の見え方を示す模式図である。It is a schematic diagram which shows the appearance when a polarizing sheet is overlaid on the latent image forming body of the present invention. 本発明で使用している万線の角度、ピッチ及び位相について説明するための図である。It is a figure for demonstrating the angle of the line used by this invention, a pitch, and a phase. 本発明における偏光潜像部の一実施形態例を示す拡大模式図である。It is an enlarged schematic diagram which shows one example of embodiment of the polarization latent image part in this invention. 本発明における潜像形成体の検証方法を説明する図である。It is a figure explaining the verification method of the latent image formation body in this invention.

以下、本発明における潜像形成体の実施形態を、図面を参照して詳細に説明する。   Hereinafter, embodiments of a latent image forming body according to the present invention will be described in detail with reference to the drawings.

本発明における潜像形成体は位相差層を有し、位相差層は少なくとも偏光潜像部を、又は偏光潜像部と偏光背景部とを有している。   The latent image forming body in the present invention has a retardation layer, and the retardation layer has at least a polarized latent image portion, or a polarized latent image portion and a polarized background portion.

図1は、本発明における潜像形成体の一実施例を示す概観図である。図1に示した潜像形成体は、基材上に反射層と位相差層とをこの順に積層したものである。   FIG. 1 is a schematic view showing an embodiment of a latent image forming body in the present invention. The latent image forming body shown in FIG. 1 is obtained by laminating a reflective layer and a retardation layer in this order on a substrate.

図1(a)に示した位相差層は偏光潜像部のみを有しており、偏光潜像部内においては、位相差層の光軸は一定の方向に配向されている。図1(c)及び(d)に示した位相差層は、偏光潜像部と偏光背景部とを有しており、偏光潜像部と偏光背景部とでは、位相差子の光軸の配向方向が異なる。   The retardation layer shown in FIG. 1A has only a polarization latent image portion, and the optical axis of the retardation layer is oriented in a certain direction in the polarization latent image portion. The retardation layer shown in FIGS. 1C and 1D has a polarization latent image portion and a polarization background portion, and the polarization latent image portion and the polarization background portion have an optical axis of the retardation film. The orientation direction is different.

図2は、本発明における潜像形成体に、偏光シートを重ねた際の、光の進路を説明するための図である。   FIG. 2 is a view for explaining the path of light when a polarizing sheet is superimposed on the latent image forming body in the present invention.

図2(a)においては、偏光シートは、一定の偏光方向を有する直線偏光を透過する性質を有する偏光子で形成されている。ここでは、位相差層が、1/4λの位相差値をもつ位相差子からなり、偏光潜像部と偏光背景部とでは、位相差子の光軸方向が45°ずれるように配置された潜像形成体を例にあげる。   In Fig.2 (a), the polarizing sheet is formed with the polarizer which has the property to permeate | transmit the linearly polarized light which has a fixed polarization direction. Here, the phase difference layer is made of a phase difference having a phase difference value of 1 / 4λ, and the optical axis direction of the phase difference is shifted by 45 ° between the polarization latent image portion and the polarization background portion. Take a latent image forming body as an example.

まず、自然光が偏光シートを通過し、直線偏光となる。ここで、直線偏光の偏光方向と、偏光背景部の位相差子の光軸方向とが同じであった場合、直線偏光は位相差子の影響を受けずに、そのまま通過し、反射され、偏光シートを再度通過する。一方で、偏光潜像部においては、位相差子の光軸に対して、直線変更の偏光方向が45°ずれて入射することになり、反射を考慮すると、1/4λ×2=1/2λの位相差を受けることなり、直線偏光の偏光面は90°回転する。その結果、反射光が偏光シートで遮断される。   First, natural light passes through the polarizing sheet and becomes linearly polarized light. Here, when the polarization direction of the linearly polarized light and the optical axis direction of the phase retarder in the polarization background portion are the same, the linearly polarized light passes through and is reflected without being affected by the phase retarder. Pass the sheet again. On the other hand, in the polarization latent image portion, the polarization direction of the linear change is incident with a shift of 45 ° with respect to the optical axis of the phase retarder, and considering reflection, 1 / 4λ × 2 = 1 / 2λ Therefore, the plane of polarization of the linearly polarized light is rotated by 90 °. As a result, the reflected light is blocked by the polarizing sheet.

よって、偏光シートを介して入射した光は、偏光潜像部と偏光背景部のいずれに入射するかによって、反射した際に偏光シートを透過するか否かが変わり、偏光潜像が顕像化する。ここで、位相差子の位相差値及び偏光潜像部と偏光背景部とでの光軸の配向方向のずれは、同様の光学効果を呈するのであれば、特に上記したものに限定されない。   Therefore, whether the light incident through the polarizing sheet is incident on the polarized latent image portion or the polarized background portion changes whether or not it is transmitted through the polarizing sheet when reflected, and the polarized latent image is visualized. To do. Here, the phase difference value of the phase retarder and the deviation of the alignment direction of the optical axis between the polarization latent image portion and the polarization background portion are not particularly limited as long as the same optical effect is exhibited.

図2(b)においては、偏光シートは、一定の偏光方向を有する直線偏光を透過する性質を有する偏光子と、位相差子とを積層してなる。ここでは、潜像形成体の位相差層及び偏光シートの位相差子が、1/8λの位相差値を持ち、潜像形成体の偏光潜像部と偏光背景部とでは、位相差子の光軸方向が直角になるように配向されている場合を例に挙げる。   In FIG. 2B, the polarizing sheet is formed by laminating a polarizer having a property of transmitting linearly polarized light having a certain polarization direction and a phase retarder. Here, the retardation layer of the latent image forming body and the retardation of the polarizing sheet have a retardation value of 1 / 8λ, and the polarization latent image portion and the polarization background portion of the latent image forming body An example is given in which the orientation is such that the optical axis direction is perpendicular.

まず自然光が偏光シートの偏光子を通過して直線偏光となる、潜像形成体の位相差層の光軸の配向方向と、偏光シートの位相差子の光軸の配向方向とが平行であれば、直線偏光は位相差子、位相差層、反射して位相差層、位相差子という順に通過する中で、1/2λ(=1/8λ+1/8λ+1/8λ+1/8λ)の位相差をうけることとなり、偏光面が90°回転し、偏光シートの偏光子で遮断される。   First, natural light passes through the polarizer of the polarizing sheet to become linearly polarized light, and the alignment direction of the optical axis of the retardation layer of the latent image forming body is parallel to the alignment direction of the optical axis of the retardation film of the polarizing sheet. For example, linearly polarized light undergoes a phase difference of 1 / 2λ (= 1 / 8λ + 1 / 8λ + 1 / 8λ + 1 / 8λ) while passing through the phase retarder, the phase difference layer, the reflected phase difference layer, and the phase retarder in this order. As a result, the polarization plane rotates 90 ° and is blocked by the polarizer of the polarizing sheet.

一方で、位相差層の光軸の配向方向と偏光シートの位相差子の光軸の配向方向とが直行する場合には、直線偏光が受ける位相差は0(=1/8λ−1/8λ−1/8λ+1/8λ)となり、直線偏光は結果的に位相差層及び位相差子の影響を受けず、偏光シートの偏光子を通過する。   On the other hand, when the alignment direction of the optical axis of the retardation layer and the alignment direction of the optical axis of the retardation film of the polarizing sheet are orthogonal, the phase difference received by the linearly polarized light is 0 (= 1 / 8λ-1 / 8λ). −1 / 8λ + 1 / 8λ), and as a result, the linearly polarized light is not affected by the retardation layer and the retardation film, and passes through the polarizer of the polarizing sheet.

よって、偏光シートを介して入射した光は、偏光潜像部と偏光背景部とのどちらを通過したかにより、偏光シートの偏光子を通過するか否かが変わってくることとなり、偏光潜像が顕像化する。なお、ここでも、位相差層及び偏光シートに設けられた位相差子を通過した光が同様の光学効果を受けるのであれば良く、位相差層及び位相差子の位相差値、偏光潜像部と偏光背景部との光軸の配向方向のずれはこれに限定されるものではない。   Therefore, whether the light incident through the polarizing sheet passes through the polarizer of the polarizing sheet varies depending on whether it passes through the polarizing latent image portion or the polarizing background portion. Becomes visible. Here, it is sufficient that the light passing through the retardation film provided on the retardation layer and the polarizing sheet is subjected to the same optical effect. The retardation value of the retardation layer and the retardation film, and the polarization latent image portion The deviation of the alignment direction of the optical axis between the polarizing background portion and the polarizing background portion is not limited to this.

以上のように、本発明における潜像形成体に、それぞれに対応した偏光シートを重ねることにより、図2を用いて説明した如く特殊な光学効果が発生し、偏光潜像が顕像化する。   As described above, by superimposing the corresponding polarizing sheets on the latent image forming body in the present invention, a special optical effect is generated as described with reference to FIG. 2, and the polarized latent image is visualized.

この潜像形成体に偏光シートを重ねたものを偏光シート側から目視すると、偏光潜像部に入射した光が偏光シートによって遮断される場合には、図3(a)の如く視認される。また、位相差層が偏光潜像部及び偏光背景部を有する場合であって、偏光潜像部に入射した光は偏光シートを透過し、偏光背景部に入射した光は偏光シートに遮断される場合には、図3(b)に示した如く、偏光潜像部及び偏光背景部がネガポジ反転して視認される。   When the latent image forming body with the polarizing sheet superimposed thereon is viewed from the polarizing sheet side, the light incident on the polarizing latent image portion is visually recognized as shown in FIG. Further, in the case where the retardation layer has a polarization latent image portion and a polarization background portion, light incident on the polarization latent image portion is transmitted through the polarization sheet, and light incident on the polarization background portion is blocked by the polarization sheet. In this case, as shown in FIG. 3B, the polarization latent image portion and the polarization background portion are visually recognized with negative-positive inversion.

なお、本発明における潜像形成体は、偏光シートを重ねていない状態では、目視では偏光潜像部と偏光背景部とは一様に視認され、偏光潜像が形成されていることは、認識できないものである。   Note that the latent image forming body in the present invention recognizes that the polarization latent image portion and the polarization background portion are visually visually recognized and the polarization latent image is formed when the polarizing sheets are not overlapped. It is not possible.

なお、本発明における潜像形成体及び偏光シートは、図1又は図2の形態に限定されるものではなく、偏光シートを介して入射した光が、偏光潜像部に入射するか、偏光背景部に入射するかによって、その反射光が偏光シートを通過するか否かが変わり、結果として偏光潜像が顕像化するような構成であればよい。   Note that the latent image forming body and the polarizing sheet in the present invention are not limited to the form shown in FIG. 1 or FIG. 2, and light incident through the polarizing sheet is incident on the polarizing latent image portion or polarized background. Whether the reflected light passes through the polarizing sheet changes depending on whether it is incident on the part, and the polarization latent image may be visualized as a result.

また、位相差層が、偏光背景部と複数の偏光潜像部を有していても良く、この場合には、それぞれの偏光潜像部の光軸が配向された方向が異なっていても良いし、一部若しくは全部の変更潜像部において光軸が配向された方向が同じでも良い。   The retardation layer may have a polarization background portion and a plurality of polarization latent image portions. In this case, the directions in which the optical axes of the respective polarization latent image portions are oriented may be different. In addition, the direction in which the optical axis is oriented may be the same in some or all of the changed latent image portions.

また、詳細については後ほど述べるが、本発明における偏光潜像部は、微細な万線で構成されている。よって、厳密に言えば、図1及び図2で示した偏光潜像部の、万線がない部分については、ブランクであるか、若しくは偏光背景部と同じ性質を持つ。しかし、図1及び図2においては、通常の目視で視認される概観図を示していることをここで述べておく。   Although details will be described later, the polarization latent image portion in the present invention is composed of fine lines. Therefore, strictly speaking, the portion of the polarization latent image portion shown in FIGS. 1 and 2 that does not have a line is either blank or has the same property as the polarization background portion. However, it should be noted here that FIG. 1 and FIG. 2 show a general view visually recognized by ordinary eyes.

さらに、前述した潜像形成体の、基材の位相差層を設けた側とは反対の側に、接着層を設けて、ラベルタイプの潜像形成体としても良い。また、基材を含まない潜像形成体の片面に粘着層を積層し、反対の面に剥離層又は剥離保護層を介して転写基材を積層して、転写箔タイプの潜像形成体としても良い。   Furthermore, an adhesive layer may be provided on the opposite side of the above-described latent image forming body to the side on which the retardation layer is provided to form a label type latent image forming body. In addition, an adhesive layer is laminated on one side of a latent image forming body that does not include a base material, and a transfer base material is laminated on the opposite side via a peeling layer or a peeling protective layer to form a transfer foil type latent image forming body. Also good.

基材としては、押出加工やキャスト加工により作製された無延伸フィルム及び、延伸加工により作製された延伸フィルム等を用いる事ができる。延伸フィルムには、伸ばし方により、1軸延伸フィルム及び2軸延伸フィルムがあり、両者とも使用できる。   As a base material, the unstretched film produced by the extrusion process and the cast process, the stretched film produced by the drawing process, etc. can be used. The stretched film includes a uniaxially stretched film and a biaxially stretched film depending on how to stretch, and both can be used.

これらの無延伸フィルム及び延伸フィルムの材料としては、セロハン、ポリカーボネート(PC)、ポリエチレン(PE)、ポリプロピレン(PP)、ポリオレフィン(PO)、エチレンビニルアルコール(EVOH)、ポリビニルアルコール(PVA)、ポリ塩化ビニル、ポリエチレンナフタレート(PEN)、ポリエチレンテレフタレート(PET)、ナイロン、アクリル樹脂、トリアセチルセルロース(TAC)フィルム等があげられる。   These unstretched films and stretched film materials include cellophane, polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyolefin (PO), ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVA), polychlorinated. Examples thereof include vinyl, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), nylon, acrylic resin, and triacetyl cellulose (TAC) film.

位相差層及び偏光シートに用いられる位相差子としては、複屈折性を持つ材料があげられる。複屈折とは、物質の屈折率が光軸方向によって異なる事で、これにより複屈折性を持つ物質中を光が透過するときにその速度が異なってくるので、物質通過後の光には通過速度の差の分だけ位相差が生じることになる。位相差値は屈折率と膜厚で決定することができる。   Examples of the phase retarder used for the phase difference layer and the polarizing sheet include materials having birefringence. Birefringence means that the refractive index of a substance varies depending on the direction of the optical axis, and this changes the speed when light passes through a substance having birefringence. A phase difference is generated by the difference in speed. The phase difference value can be determined by the refractive index and the film thickness.

位相差子は、例えば一定の方向に配向処理を行った配向膜の上に液晶材料を塗布することにより形成することが可能である。また、偏光潜像部と偏光背景部とで光軸の方向を変えるためには、例えば、部分的に配向処理の方向を変えた配向膜の上に、液晶材料を塗布することにより形成可能である。   The retardation film can be formed, for example, by applying a liquid crystal material on an alignment film that has been subjected to alignment treatment in a certain direction. In addition, in order to change the direction of the optical axis between the polarization latent image portion and the polarization background portion, for example, it can be formed by coating a liquid crystal material on an alignment film in which the direction of alignment treatment is partially changed. is there.

位相差子に用いられる液晶材料としては、メソゲン基の両端にアクリレートを設けた光硬化型液晶モノマー、EB若しくはUVで硬化させた高分子液晶、ポリマー主鎖にメソゲン基を提げた高分子液晶、分子主鎖自体が配向する液晶性高分子を用いる事が出来る。これらの液晶は、塗布後、NI点の少し下の温度で熱処理することにより、配向を促進することが可能である。   As liquid crystal materials used for the phase retarder, photocurable liquid crystal monomers provided with acrylates at both ends of the mesogenic group, polymer liquid crystals cured with EB or UV, polymer liquid crystals with mesogenic groups in the polymer main chain, A liquid crystalline polymer in which the molecular main chain itself is aligned can be used. The orientation of these liquid crystals can be promoted by heat treatment at a temperature slightly below the NI point after coating.

位相差子において液晶材料を配向させるための配向膜の配向処理には、例えば光配向法若しくはラビング配向法を用いる事が出来るが、本発明において偏光潜像部及び偏光背景部を形成する際には、偏光潜像部が微細な万線で構成されるため、光配向法が特に好適な方法である。   For the alignment treatment of the alignment film for aligning the liquid crystal material in the phase retarder, for example, a photo alignment method or a rubbing alignment method can be used. In the present invention, when forming the polarization latent image portion and the polarization background portion, Since the polarization latent image portion is composed of fine lines, the photo-alignment method is a particularly suitable method.

光配向法とは、配向膜に偏光等の異方性を有する光を照射若しくは非偏光光を斜めから照射し、配向膜内の分子の再配列や異方的な化学反応を誘起する方法で、配向膜に異方性を与え、これによって液晶分子が配向することを利用したものである。光配向のメカニズムとしては、アゾベンゼン誘導体の光異性化、桂皮酸エステル、クマリン、カルコンやベンゾフェノン等の誘導体の光二量化や架橋、ポリイミド等の光分解等があげられる。   The photo-alignment method is a method that induces rearrangement of molecules in the alignment film and anisotropic chemical reaction by irradiating the alignment film with light having anisotropy such as polarized light or non-polarized light from an oblique direction. In this method, anisotropy is imparted to the alignment film, whereby the liquid crystal molecules are aligned. The photo-alignment mechanism includes photoisomerization of azobenzene derivatives, photodimerization and crosslinking of derivatives such as cinnamic acid ester, coumarin, chalcone and benzophenone, and photolysis of polyimide and the like.

具体的には、適当な波長帯域の偏光光若しくは斜めからの非偏光光によりパターン露光することにより行われる。また、偏光潜像部と偏光背景部の如く、2軸方向に配向させる場合は、フォトマスクで配向方向を変えたい部分をカバーしてパターン露光し、さらにフォトマスクでカバーされていた未露光部を処理するため方向を変えて露光すれば良い。または、一度全面をパターン露光した後に、部分的にフォトマスクでカバーして方向を変えて再度露光しても良い。   Specifically, it is performed by pattern exposure with polarized light in an appropriate wavelength band or non-polarized light from an oblique direction. Also, when aligning in the biaxial direction, such as a polarized latent image portion and a polarized background portion, pattern exposure is performed by covering the portion whose orientation direction is to be changed with a photomask, and further, the unexposed portion covered with the photomask. In order to process, exposure may be performed while changing the direction. Alternatively, after the entire surface is once exposed to pattern, it may be partially covered with a photomask and changed in direction to be exposed again.

ラビング法は、基材上にポリマー溶液を塗布して作成した配向膜を布で擦る方法で、擦った方向に配向膜表面の性質が変化し、この方向に液晶分子が並ぶという性質を利用したものである。配向膜には、ポリイミド、PVA等が用いられる。   The rubbing method is a method of rubbing an alignment film created by applying a polymer solution on a substrate with a cloth. The property of the alignment film surface changes in the rubbing direction and liquid crystal molecules are aligned in this direction. Is. For the alignment film, polyimide, PVA, or the like is used.

また、偏光潜像部と偏光背景部の如く、光軸を2軸方向に配向させる場合には、配向方向を変えたい部分をマスクでカバーして布で擦った後にマスクを除去し、今度は先ほどラビングした部分をマスクでカバーし、再び方向を変えて布で擦った後、マスクを除去する。または、全面を布で擦った後に、部分的にマスクでカバーし、方向変えて布で擦った後、マスクを除去しても良い。   Also, when the optical axis is oriented in the biaxial direction, such as the polarization latent image portion and the polarization background portion, the portion to change the orientation direction is covered with a mask and rubbed with a cloth, and then the mask is removed. Cover the rubbed part with a mask, change the direction again and rub with a cloth, and then remove the mask. Alternatively, the entire surface may be rubbed with a cloth, partially covered with a mask, the direction may be changed, and the mask may be removed after being rubbed with a cloth.

これら配向膜を形成する方法としては、グラビアコーティング法、マイクログラビアコーティング法等の公知の手法を用いる事が出来る。また、位相差子として、光配向法やラビング法により、配向膜自身が複屈折率性を持つもの等も利用できる。   As a method for forming these alignment films, known methods such as a gravure coating method and a micro gravure coating method can be used. Further, as the phase retarder, a film having an alignment film itself having birefringence by a photo-alignment method or a rubbing method can be used.

反射層は、光反射効果を有するインキ等を公知の印刷方法により設けても良いし、金属を蒸着若しくはスパッタリング等の方法で設けても良い。反射層に金属を用いる場合の材料としては、例えばAl、Sn、Cr、Ni、Cu、Au、インコネル、ステンレス、ジュラルミン等の金属を単体又は複合させたものが使用可能である。   The reflective layer may be provided with an ink having a light reflecting effect by a known printing method, or may be provided with a method such as vapor deposition or sputtering. As a material in the case of using a metal for the reflective layer, for example, a material such as Al, Sn, Cr, Ni, Cu, Au, Inconel, stainless steel, and duralumin can be used alone or in combination.

また、光反射効果を有するインキ層を印刷により全面若しくはパターンで設けた転写箔、若しくは金属反射層を備えた転写箔を作製し、転写を行うことで反射層を設けても良いし、金属箔や金属層を有するフィルムをラミネートして反射層を設けても良く、その作製方法は特に限定されない。   Alternatively, a transfer foil provided with an ink layer having a light reflection effect by printing or in a pattern or a transfer foil provided with a metal reflection layer may be prepared, and a reflection layer may be provided by performing transfer. Alternatively, a reflective layer may be provided by laminating a film having a metal layer, and its manufacturing method is not particularly limited.

反射層をパターン状に設ける場合には、全面に反射層を形成した後に、エッチング加工、レーザー加工、水洗シーライト加工等の公知の方法でパターン化しても良いし、前記公知の方法にてパターン化した反射層を転写若しくはラミネートしても良い。   When the reflective layer is provided in a pattern, after forming the reflective layer on the entire surface, the reflective layer may be patterned by a known method such as etching, laser processing, washing sea light processing, or the like. The converted reflective layer may be transferred or laminated.

また、本発明の潜像形成体には、回折構造形成層を設けても良い(図示せず)。回折構造形成層は、位相差層と反射層との層間に設ければ良い。回折構造を形成することにより、視覚効果及び偽造防止効果を向上させることが可能となる。さらに反射率の異なる回折構造効果層を、回折構造形成層の回折構造を追従するように設けることにより、この視覚効果をさらに強調することが可能となる。   The latent image forming body of the present invention may be provided with a diffraction structure forming layer (not shown). The diffractive structure forming layer may be provided between the retardation layer and the reflective layer. By forming the diffractive structure, the visual effect and the forgery prevention effect can be improved. Further, by providing the diffractive structure effect layer having a different reflectance so as to follow the diffractive structure of the diffractive structure forming layer, this visual effect can be further emphasized.

偏光シートに用いられる偏光子としては、反射光若しくは透過光にて特定偏光成分を分離若しくは抽出できる素子であれば利用可能である。例えば、PVAにヨウ素若しくは2色性染料を含浸させ延伸配向させた吸収型偏光子、2色性染料を配向膜上で配向させた吸収型偏光子等があげられるが、一定の方向に偏光した偏光光を作り出す偏光子であれば、これに限定されない。   As the polarizer used in the polarizing sheet, any element that can separate or extract a specific polarization component by reflected light or transmitted light can be used. For example, an absorption polarizer in which PVA is impregnated with iodine or a dichroic dye and stretched and oriented, an absorption polarizer in which a dichroic dye is oriented on an alignment film, and the like are mentioned. The polarizer is not limited to this as long as it is a polarizer that generates polarized light.

次に、本発明において偏光潜像部が万線で形成されていることについて図を用いて詳細に説明する。万線で形成された偏光潜像部は、万線潜像部と万線背景部とを有している。   Next, it will be described in detail with reference to the drawings that the polarization latent image portion is formed by a line in the present invention. The polarization latent image portion formed by a line has a line latent image portion and a line background portion.

なお、実際には偏光潜像部と偏光背景部とは、偏光シートとの対応関係により、両者がネガポジ反転して顕像化する故、偏光背景部が万線で形成され、万線潜像部及び万線背景部を有していても、偏光潜像部と偏光背景部の両方が万線で構成され、万線潜像部及び万線背景部を有していても良いものとする。   Actually, the polarized latent image portion and the polarized background portion are visualized by negative-positive reversal due to the correspondence relationship with the polarizing sheet. 2 and the line background part, both the polarization latent image part and the polarization background part are composed of lines, and may have a line latent image part and a line background part. .

万線潜像部を形成する万線と万線背景部を形成する万線とは、万線の太さ、角度、ピッチ及び位相のいずれか1つ以上が異なっている。なお、偏光潜像部を形成している万線は、デザインに支障がない程度の微細な点となっているので、偏光潜像として顕像化していても、視覚上では、万線模様として確認することはできない。   The line forming the line latent image part and the line forming the line background part differ in one or more of the line thickness, angle, pitch and phase. The lines forming the polarization latent image portion are fine points that do not hinder the design, so even if they are visualized as a polarization latent image, they are visually recognized as line patterns. It cannot be confirmed.

ここで、本発明で使用している万線の角度、ピッチ及び位相について図4を用いて説明しておく。本発明における万線の角度は図4(a)のθを指し、規則的に並んでいる万線の傾きを表す。万線のピッチは図4(a)のDを指し、1つの万線から隣の最近接している万線までの距離を表している。また、ピッチD内での万線部と非万線部の比率を万線比率と呼ぶ。   Here, the angle, pitch, and phase of the lines used in the present invention will be described with reference to FIG. The angle of the line in the present invention indicates θ in FIG. 4A and represents the inclination of the line that is regularly arranged. The pitch of each line refers to D in FIG. 4A and represents the distance from one line to the adjacent closest line. Further, the ratio of the line part and the non-line part in the pitch D is called a line ratio.

一方で、万線の位相とは、図4(b)のkを指し、規則的に並んでいる万線の周期を表している。図6(b)では、万線Aと万線Bは、位相がgだけずれている状態を示している。   On the other hand, the phase of the line indicates k in FIG. 4B and represents the period of the line regularly arranged. In FIG. 6B, line A and line B show a state where the phases are shifted by g.

万線の太さは、太すぎても細すぎても顕像化用シートを重ねた際に万線潜像が視認しづらくなるので、10〜1000μmの範囲、好ましくは10〜500μmに設定することが望ましい。また、万線比率(=万線部/(万線部+非万線部))は任意に設定しても良いが、1/10〜9/10の範囲で、好ましくは1/3〜2/3に設定することが望ましい。さらに好ましくは比率が1/2である。よって、万線のピッチは20〜2000μm、好ましくは20〜1000μmの範囲に設定することが望ましい。   The thickness of the line is set in the range of 10 to 1000 μm, preferably 10 to 500 μm because the line latent image is difficult to be visually recognized when the visualization sheets are stacked even if the line is too thick or too thin. It is desirable. Further, the line ratio (= line part / (line part + non-line part)) may be set arbitrarily, but is in the range of 1/10 to 9/10, preferably 1/3 to 2. It is desirable to set to / 3. More preferably, the ratio is 1/2. Therefore, it is desirable that the pitch of the line is set in the range of 20 to 2000 μm, preferably 20 to 1000 μm.

顕像化用シートを重ねて万線潜像を顕像化するためには、万線背景部と万線潜像部とで、万線の太さ、角度、ピッチ及び位相のいずれか1つ以上が異なる万線パターンを使用すれば良い。ただし、それぞれが近似しすぎていると万線潜像が見えづらくなるので考慮する。   In order to visualize the line latent image by superimposing the visualization sheets, any one of the line thickness, angle, pitch, and phase in the line background part and line latent image part A different line pattern may be used. However, it is difficult to see the latent line image if they are too close to each other.

図5は、万線で構成された偏光潜像部を示したものである。ただし、図5においては、説明のために、万線を太くし、ピッチも広くしている。図5(a)は、万線潜像部と万線背景部とが合わさった偏光潜像部であり、図5(b)はそのうち万線背景部のみを、図5(c)は万線潜像部のみを切り出した図である。   FIG. 5 shows a polarization latent image portion composed of lines. However, in FIG. 5, the lines are thickened and the pitch is widened for explanation. FIG. 5A is a polarization latent image portion in which the line latent image portion and the line background portion are combined, FIG. 5B shows only the line background portion, and FIG. 5C shows the line. It is the figure which cut out only the latent image part.

図5に示した偏光潜像部は、万線潜像部と万線背景部を形成する万線が、同一ピッチ及び同一万線比率で、異なる角度で設けられている。万線潜像部と万線背景部の万線角度は、45°異なるために、顕像化シートを用いた場合、0°方向と45°方向で柄のネガポジが反転した万線潜像が現れることになる。   In the polarization latent image portion shown in FIG. 5, the lines forming the line latent image portion and the line background portion are provided at the same pitch and the same line ratio at different angles. Since the line angle of the line latent image part and the line background part differs by 45 °, when a visualization sheet is used, the line latent image in which the pattern negative / positive is reversed in the 0 ° direction and the 45 ° direction is obtained. Will appear.

顕像化用シートとしては、万線背景部若しくは万線潜像部を形成する万線のピッチ及び万線比率と同じピッチ及び万線比率からなる万線状の顕像化用パターンが公知の印刷方法により形成された透明性を有するシート状のものであれば良く、材料等は特に限定しない。この顕像化用パターンは、万線背景部若しくは万線潜像部を形成する万線のピッチ及び万線比率と同じ万線比率(=万線部/(万線部+非万線部))からなる万線状又は格子状の顕像化用パターンであっても良い。   As the visualization sheet, a line-like visualization pattern having the same pitch and line ratio as the line pitch and line ratio forming the line background portion or line latent image portion is known. Any material may be used as long as it is a sheet having transparency and formed by a printing method. This visualization pattern has the same line ratio as the pitch and line ratio of the line forming the line background part or line latent image part (= line part / (line part + non-line part) Or a line-like or grid-like pattern for visualization.

図6は本発明における潜像形成体の検証方法を説明する図である。まずは、偏光シートを重ねて、偏光潜像の出現の有無にて検証を行う。その後、出現した万線で形成された偏光潜像に顕像化用シートをさらに重ね、万線潜像が出現するか否かにて検証を行う。   FIG. 6 is a diagram for explaining a method for verifying a latent image forming body according to the present invention. First, the polarizing sheets are overlapped, and verification is performed based on whether or not a polarization latent image appears. Thereafter, a visualization sheet is further superimposed on the polarized latent image formed by the appearing line, and verification is performed by checking whether the line latent image appears.

なお、検証は、偏光シート及び顕像化用シートの両者を動かしながら検証を行う。図6(a)、(b)、(c)に示したように、偏光潜像部の光軸方向により検証する角度や位置が限定される可能性がある故、偏光シートは、万線潜像部が、偏光潜像として顕像化している状態で固定して行っても良い。   The verification is performed while moving both the polarizing sheet and the visualization sheet. As shown in FIGS. 6A, 6B, and 6C, the angle and position to be verified may be limited depending on the optical axis direction of the polarization latent image portion. The image portion may be fixed while being visualized as a polarization latent image.

また、顕像化用シートの重ねる位置又は角度を変えた時にそれぞれ出現する複数の万線潜像を形成することも可能である。各々の偏光潜像部の形状も任意の形状に形成して良い。また、全ての偏光潜像部の万線構成を異なるように形成しても、一部の偏光潜像部の万線構成のみを異なるように形成しても良く、バラエティ性に富んだ潜像形成体を自由にデザインすることが可能である。   It is also possible to form a plurality of line latent images that respectively appear when the position or angle at which the visualization sheets overlap is changed. Each of the polarization latent image portions may be formed in an arbitrary shape. Further, all the polarization latent image portions may be formed with different line configurations, or only some of the polarization latent image portions may be formed with different line configurations. It is possible to design the formed body freely.

これにより、万線パターン又は万線模様のピッチが異なる複数の顕像化用シート若しくは潜像形成体の領域と各々に形成されたピッチと完全に一致する顕像化用シートを用意しなければならず、たとえ潜像の存在に気づいたとしても、全ての潜像を確認することは困難となる故、一部を偽造・改ざんされたとしても、確実に真偽判定が可能となる。   Thus, a line pattern or a plurality of visualization sheets having different line pattern pitches or areas of latent image forming bodies and visualization sheets that completely match the pitches formed in each area must be prepared. In other words, even if the presence of a latent image is noticed, it is difficult to confirm all the latent images, so that even if some of the latent images are forged or altered, it is possible to reliably determine whether the images are forged.

また、偏光シート及び顕像化用シートの機能を兼ね備えた検証デバイスにより同時に偏光潜像及び網点潜像の出現の有無を検証することも可能である。   It is also possible to simultaneously verify the presence or absence of the appearance of a polarized latent image and a halftone dot latent image by using a verification device having the functions of a polarizing sheet and a visualization sheet.

検証デバイスとしては、例えば、偏光シート上に前記顕像化用パターンを、有色インキ等を用いて公知の印刷方法にて備えた検証デバイス、偏光シート上に偏光潜像と同様のパターンの位相差子を備えた検証デバイス、偏光シートを前記顕像化用パターンにて配置した検証デバイス、偏光方向の異なる偏光子をストライプ状、市松模様状等に配置した検証デバイス等が使用可能である。また、検証デバイスは、本願における潜像形成体の偏光潜像及び網点潜像の双方を顕像かすることが可能であれば、特に上記した形態に限定されない。   As the verification device, for example, the above-mentioned pattern for visualization on a polarizing sheet, a verification device provided with a known printing method using colored ink, etc., the phase difference of the same pattern as the polarization latent image on the polarizing sheet A verification device including a polarizer, a verification device in which a polarizing sheet is arranged in the visualization pattern, a verification device in which polarizers having different polarization directions are arranged in a stripe pattern, a checkered pattern, or the like can be used. The verification device is not particularly limited to the above-described form as long as it can visualize both the polarization latent image and the halftone dot latent image of the latent image forming body in the present application.

偏光子を前記顕像化用パターンにて配置した検証デバイスを作製するには、シート状の偏光子を公知の方法にて万線状に穴を開ける等して配置されるように工夫すると良い。   In order to produce a verification device in which a polarizer is arranged in the pattern for visualization, a sheet-like polarizer may be devised so as to be arranged in a line-like manner by a known method. .

また、前述した検証デバイスに、さらに厚みのある透明シートを組み合わせることにより、検証デバイスを動かさなくても見る角度を連続的に変えることにより画像の濃淡が連続的に変化し、立体感のあるモアレ模様を得ることが出来る。   In addition, by combining the above-described verification device with a thicker transparent sheet, the contrast of the image changes continuously by continuously changing the viewing angle without moving the verification device, resulting in a three-dimensional moire pattern. A pattern can be obtained.

厚みのある透明シートとしては、潜像形成体の基材と同様の材料を用いても良いし、レンズ効果のある材料を用いても良い。また、透明シートの厚みは、基材の屈折率にもよるが、万線のピッチの0.3〜3倍が好ましい。これは、0.3倍未満であると立体感が得られず、また3倍以上であると透明シートの影響で万線潜像が見え難くなるためである。   As the thick transparent sheet, a material similar to the base material of the latent image forming body may be used, or a material having a lens effect may be used. Moreover, although the thickness of a transparent sheet is based also on the refractive index of a base material, 0.3 to 3 times the pitch of a line is preferable. This is because if it is less than 0.3 times, a stereoscopic effect cannot be obtained, and if it is more than 3 times, it is difficult to see the latent line image due to the effect of the transparent sheet.

また別の実施形態例として、前記潜像形成体と前記検証デバイスとを、一連の支持体上に並列に設けても良い。この支持体は可とう性を有することが必須であり、不透明なものでも透明なものでも良い。ただし、支持体越しに検証を行う場合もあるので、不透明な支持体の場合には、指示体に窓を設ける等の工夫をしなくてはならない。また、透明なものであっても支持体の複屈折率をコントロールされているものが良い。材料としては、潜像形成体の基材と同様のものが使用できる。   In another embodiment, the latent image forming body and the verification device may be provided in parallel on a series of supports. This support is essential to have flexibility, and may be opaque or transparent. However, since verification may be performed through the support, in the case of an opaque support, it is necessary to devise such as providing a window on the indicator. Moreover, even if it is transparent, it is preferable that the birefringence of the support is controlled. As the material, the same material as the substrate of the latent image forming body can be used.

可とう性を有する支持体は、検証のしやすさから長方形が好ましい。潜像形成体と検証デバイスを並べて設ければ、支持体を変形させて重ね合わせることにより、偏光潜像及び万線潜像の出現の有無を確認できる。また、検証デバイスではなく、偏光シートと顕像化用シートを別々に設けても良い。例えば、潜像形成体を挟む形で支持体の両端に偏光シート及び顕像化用シートを配置すれば、偏光シートと顕像化用シートが潜像形成体に重なるように支持体を変形させることにより、偏光潜像及び万線潜像の出現の有無を確認することが出来る。   The flexible support is preferably rectangular because it is easy to verify. If the latent image forming body and the verification device are provided side by side, the presence or absence of the appearance of the polarization latent image and the line latent image can be confirmed by deforming and superposing the support. Further, instead of the verification device, a polarizing sheet and a visualization sheet may be provided separately. For example, if a polarizing sheet and a visualization sheet are arranged at both ends of the support with the latent image forming body interposed therebetween, the support is deformed so that the polarizing sheet and the visualization sheet overlap the latent image forming body. Thus, the presence or absence of the appearance of the polarization latent image and the line latent image can be confirmed.

(実施例1)
アルミ蒸着PETであるメタルミーS#25(東レ社製)を基材とし、光配向剤であるIA−01(大日本インキ化学工業社製)をマイクログラビアで塗布し製膜を行った。この光配向剤は、365nmの偏光光を照射すると、偏光方向に液晶配向力を持つ材料である。この光配向膜に対して偏光紫外線を用いて全面で2J/cmの照射を行い、全面照射した偏光方向に対して45°の角度差が付いた方向にフォトマスクを用いて2J/cmの照射を行った。フォトマスクは図5のような画像が得られるように作成されたフォトマスクで、1つの万線パターンとそれに対して、同じ網点比率及びピッチで角度が45℃異なる万線パターンの2つの万線パターンを含んでいる。
Example 1
A metal-medium S # 25 (manufactured by Toray Industries, Inc.), which is an aluminum vapor-deposited PET, was used as a base material, and IA-01 (manufactured by Dainippon Ink & Chemicals, Inc.), a photo-alignment agent, was applied by microgravure to form a film. This photo-alignment agent is a material having a liquid crystal alignment force in the polarization direction when irradiated with 365 nm polarized light. It performs irradiation of 2J / cm 2 over the entire surface with a polarized ultraviolet against this photo-alignment film, the entire surface angle difference of 45 ° relative to the irradiated polarization direction by using a photomask in the direction marked with 2J / cm 2 Irradiation was performed. The photomask is a photomask created so that an image as shown in FIG. 5 can be obtained. One line pattern and two line patterns having the same halftone dot ratio and pitch and different angle patterns of 45 ° C. Contains line patterns.

その後、UVキュアラブル液晶UCL−008(大日本インキ化学工業社製)をマイクログラビアにて塗工した。UCL−008の複屈折率は0.18であるので、可視光の中心波長550nmの光に対して位相差値λ/4となるようにするために、膜厚を0.76μmとなるようにした。   Thereafter, UV curable liquid crystal UCL-008 (manufactured by Dainippon Ink & Chemicals, Inc.) was applied by microgravure. Since the birefringence of UCL-008 is 0.18, the film thickness is set to 0.76 μm in order to obtain a phase difference value λ / 4 with respect to the light having a central wavelength of 550 nm of visible light. did.

このように作成した潜像形成体に一定の偏光方向を有する直線偏光を透過する偏光シートを重ねたところ、図3(a)に示した如く、偏光潜像部が偏光潜像として黒色に視認され、さらに直線偏光子を45°回転させたところ、図3(b)に示す如く、偏光背景部が黒色に視認された。   When a polarizing sheet that transmits linearly polarized light having a certain polarization direction is overlaid on the latent image forming body thus created, as shown in FIG. 3A, the polarization latent image portion is visually recognized as black as a polarization latent image. Further, when the linear polarizer was further rotated by 45 °, the polarization background portion was visually recognized as black as shown in FIG.

ここで、偏光潜像部が偏光潜像として視認されている状態で、さらに偏光潜像部を形成する万線と同じ万線比率で同じピッチの万線からなる顕像化用パターンが形成された顕像化用シートを用意し、0°方向に重ねると、図6(a)のように万線背景部が黒色に視認された。また、顕像化用シートを45°回転させると、図6(b)のように万線潜像部が黒色に視認された。   Here, in the state in which the polarization latent image portion is visually recognized as a polarization latent image, a visualization pattern is formed which includes lines having the same line ratio and the same pitch as the lines forming the polarization latent image part. When the visualization sheet was prepared and overlapped in the 0 ° direction, the background portion of the line was visually recognized as black as shown in FIG. Further, when the visualization sheet was rotated by 45 °, the line latent image portion was visually recognized as black as shown in FIG.

このように、本発明における潜像形成体は、偏光シートを重ねることにより、偏光潜像が顕像化し、さらに顕像化シートを重ねることにより、偏光潜像に含まれていた万線潜像を顕像化させることができる。   As described above, the latent image forming body in the present invention visualizes the polarized latent image by overlapping the polarizing sheets, and further overlaps the latent image formed in the polarized latent image by overlapping the visualized sheets. Can be visualized.

さらにこの万線ピッチの2倍の厚みを有する透明シートに顕像化用パターンが印刷された顕像化用シートを潜像形成体に重ねると、発生したモアレ模様が見る角度を連続的に変化させることにより各点における濃淡が連続的に変化し、立体感のある画像が得られた。   Furthermore, when a visualization sheet, in which a visualization pattern is printed on a transparent sheet having a thickness twice this line pitch, is superimposed on the latent image forming body, the angle at which the generated moire pattern is viewed changes continuously. By doing so, the shading at each point changed continuously, and an image with a three-dimensional effect was obtained.

1・・・基材
2・・・位相差層
3・・・偏光潜像部
4・・・偏光背景部
5・・・反射層
6・・・偏光シート
7・・・偏光子
8・・・位相差子
DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Phase difference layer 3 ... Polarization latent image part 4 ... Polarization background part 5 ... Reflection layer 6 ... Polarizing sheet 7 ... Polarizer 8 ... Phase retarder

Claims (11)

位相差層及び反射層を具備する潜像形成体であって、
該位相差層は、少なくとも偏光潜像部を有し、
該偏光潜像部は、万線で構成され且つ万線背景部と万線潜像部とを有し、
該万線潜像部を構成する万線と、該万線背景部を構成する万線とは、万線角度、ピッチ、万線位相のいずれか1つ以上が異なることを特徴とする潜像形成体。
A latent image forming body comprising a retardation layer and a reflective layer,
The retardation layer has at least a polarization latent image portion,
The polarization latent image portion is composed of a line and has a line background portion and a line latent image portion,
The line forming the line latent image part and the line forming the line background part are different in at least one of line angle, pitch and line phase. Formed body.
前記位相差層は、さらに偏光背景部を有し、
前記偏光潜像部と該偏光背景部とでは、位相差子の光軸が異なる方向に配向されていることを特徴とする請求項1に記載の潜像形成体。
The retardation layer further has a polarization background portion,
2. The latent image forming body according to claim 1, wherein the polarization latent image portion and the polarization background portion are oriented in different directions in an optical axis of a phase retarder.
さらに基材及び粘着層を積層したことを特徴とする請求項1又は2に記載の潜像形成体。   Furthermore, the base material and the adhesion layer were laminated | stacked, The latent image formation body of Claim 1 or 2 characterized by the above-mentioned. さらに片側の最外層に粘着層を、反対側の最外層に剥離層又は剥離保護層を介して剥離基材を積層したことを特徴とする請求項1又は2に記載の潜像形成体。   The latent image forming body according to claim 1 or 2, wherein an adhesive layer is further laminated on the outermost layer on one side, and a peeling substrate is laminated on the outermost layer on the opposite side via a peeling layer or a peeling protective layer. 請求項1乃至4のいずれか1項に記載の潜像形成体に偏光シートを重ね、偏光潜像の出現の有無にて真偽判定を行うことを特徴とする潜像形成体の真偽判定方法。   An authenticity determination of a latent image forming body, wherein the latent image forming body according to any one of claims 1 to 4 is overlapped with a polarizing sheet, and the authenticity determination is performed based on the presence or absence of the appearance of the polarizing latent image. Method. さらに顕像化用パターンを形成してなる顕像化用シートを重ね、万線潜像の出現の有無にて真偽判定を行うことを特徴とする請求項5に記載の潜像形成体の真偽判定方法。   The latent image forming body according to claim 5, further comprising: stacking a visualization sheet formed with a visualization pattern, and performing authenticity determination based on the presence or absence of appearance of a line latent image. Authenticity determination method. 請求項1乃至4のいずれか1項に記載の潜像形成体に、検証デバイスを重ね、偏光潜像及び万線潜像の出現の有無にて真偽判定を行うことを特徴とする潜像形成体の真偽判定方法。   A latent image formed by superimposing a verification device on the latent image forming body according to any one of claims 1 to 4 and determining whether or not a polarized latent image and a line latent image appear. A method for determining the authenticity of a formed body. 前記検証デバイスが、偏光子で形成された前記顕像化用パターンを有することを特徴とする請求項7に記載の潜像形成体の真偽判定方法。   8. The method of determining authenticity of a latent image forming body according to claim 7, wherein the verification device has the visualization pattern formed of a polarizer. 前記検証デバイスが、厚みのある透明シートを備えることを特徴とする請求項7又は8に記載の潜像形成体の真偽判定方法。   9. The method of determining authenticity of a latent image forming body according to claim 7, wherein the verification device includes a thick transparent sheet. 可とう性を有する支持体上に、請求項1乃至4のいずれか1項に記載の潜像形成体と、偏光シート及び顕像化用パターンとを設けたことを特徴とする媒体。   A medium comprising the support having flexibility and the latent image forming body according to any one of claims 1 to 4, a polarizing sheet, and a visualization pattern. 可とう性を有する支持体上に、請求項1乃至4のいずれか1項に記載の潜像形成体と、検証デバイスとを設けたことを特徴とする媒体。   5. A medium comprising the latent image forming body according to claim 1 and a verification device on a flexible support.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011053274A (en) * 2009-08-31 2011-03-17 Toppan Printing Co Ltd Forgery preventing medium, polarizing plate for verification, and method of determining authenticity of forgery preventing medium
WO2013042737A1 (en) * 2011-09-21 2013-03-28 富士フイルム株式会社 Object including latent image
JP2013109129A (en) * 2011-11-21 2013-06-06 Toppan Printing Co Ltd Display body for forgery prevention, affixation label thereof, transfer foil and authenticity determination method
WO2013114514A1 (en) * 2012-01-31 2013-08-08 株式会社有沢製作所 Method for producing optical film, optical film, mask, and apparatus for producing optical film
JPWO2015147176A1 (en) * 2014-03-26 2017-04-13 凸版印刷株式会社 Anti-counterfeit medium and method for producing anti-counterfeit medium
JP2019204121A (en) * 2017-10-23 2019-11-28 住友化学株式会社 Retardation film and optical laminate
CN111247464A (en) * 2017-10-23 2020-06-05 住友化学株式会社 Retardation film and optical laminate

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58138669U (en) * 1982-03-12 1983-09-17 凸版印刷株式会社 Lottery ticket
JPH0484119A (en) * 1990-07-27 1992-03-17 Ookurashiyou Insatsu Kyokucho Multidimensional image display body and multidimensional image display method
JPH11277962A (en) * 1998-03-30 1999-10-12 Dainippon Printing Co Ltd Image formed body, and implement and method for confirmation
JP2001213042A (en) * 2000-01-31 2001-08-07 Toppan Printing Co Ltd Printed matter
JP2002098829A (en) * 2000-09-21 2002-04-05 Toppan Printing Co Ltd Laminated composite body and information recording medium with countermeasure for prevention of forgery by using the same
JP2006247916A (en) * 2005-03-09 2006-09-21 National Printing Bureau Image fabricator
JP2008070807A (en) * 2006-09-15 2008-03-27 Toppan Printing Co Ltd Medium and label for preventing forgery, printed matter, transferring foil and discrimination method
JP2010221541A (en) * 2009-03-24 2010-10-07 Toppan Printing Co Ltd Latent image formation object, genuineness determining method therefor and medium using latent image formation object
JP2010221539A (en) * 2009-03-24 2010-10-07 Toppan Printing Co Ltd Latent image formation object, genuineness determing method therefor and medium using latent image formation object

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58138669U (en) * 1982-03-12 1983-09-17 凸版印刷株式会社 Lottery ticket
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