JPH03141320A - Image recording method and laminated film used therein - Google Patents
Image recording method and laminated film used thereinInfo
- Publication number
- JPH03141320A JPH03141320A JP28060389A JP28060389A JPH03141320A JP H03141320 A JPH03141320 A JP H03141320A JP 28060389 A JP28060389 A JP 28060389A JP 28060389 A JP28060389 A JP 28060389A JP H03141320 A JPH03141320 A JP H03141320A
- Authority
- JP
- Japan
- Prior art keywords
- film
- image
- light
- polarizing
- image recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 19
- 230000010287 polarization Effects 0.000 claims description 12
- 239000003086 colorant Substances 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 50
- 229920000642 polymer Polymers 0.000 description 8
- 229920006254 polymer film Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- DOJXGHGHTWFZHK-UHFFFAOYSA-N Hexachloroacetone Chemical compound ClC(Cl)(Cl)C(=O)C(Cl)(Cl)Cl DOJXGHGHTWFZHK-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は異方性ポリマーフィルム積層膜を用いる画像記
録方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an image recording method using an anisotropic polymer film laminate.
(従来の技術)
2枚の偏光板の間に特定方向の分子配向を有する異方性
ポリマーフィルムを挿入することにより、発色させるこ
とは公知である。この発色の原理は第1図に示すように
2枚の例えば、互いに直交する偏光方向を有する偏光板
lおよび3の間に分子の配向方向が偏光板lの偏光方向
に対し45°の方向を向いた樹脂フィルム2を挿入する
と、光源からの光が偏光板lを通−)で直線偏光4とな
り、次に45°に配向した分子配向異方性フィルム2を
通って楕円偏光5に変わり、さらに、この楕円偏光5が
第2の偏光板3を通る際に波長によ−)で先の強さが異
なり、それが着色偏光6となって色を発現する。この原
理は現在繊維や織物に応用する試みがなされており、玉
虫色に見えるニット製品や舞台衣装、インテリアカーテ
ン、デイスプレィなどの新しい色素材として有望視され
ている(松本喜代−ら、繊維学会昭和61年度年次大会
研究発表会講演要旨集、153頁)。(Prior Art) It is known to generate color by inserting an anisotropic polymer film having molecular orientation in a specific direction between two polarizing plates. The principle of this coloring is as shown in Figure 1, between two polarizing plates 1 and 3 whose polarization directions are orthogonal to each other, the molecular orientation direction is 45° to the polarization direction of polarizing plate 1. When the oriented resin film 2 is inserted, the light from the light source passes through the polarizing plate l and becomes linearly polarized light 4, then passes through the molecular orientation anisotropic film 2 oriented at 45° and becomes elliptically polarized light 5. Furthermore, when this elliptically polarized light 5 passes through the second polarizing plate 3, its intensity differs depending on the wavelength (-), and it becomes colored polarized light 6 and exhibits a color. Attempts are currently being made to apply this principle to fibers and textiles, and it is seen as promising as a new color material for iridescent knit products, stage costumes, interior curtains, displays, etc. Collection of lecture abstracts from the annual conference research presentations, p. 153).
(発明が解決しようとする課題)
いままで、上記現象は色を発現するという点に着目され
てきた。本発明者らは」ユ記発色現象を応用し、画像を
形成させる記録材$−4として利用することを目的とす
る。(Problems to be Solved by the Invention) Until now, attention has been paid to the fact that the above phenomenon manifests color. The present inventors aim to apply the color development phenomenon and utilize it as a recording material for forming images.
(課題を解決するための手段)
すなわち、本発明は第1の偏光−フィルムを透過した光
が第1の偏光フィルムの偏光方向に対しでほぼ45°の
方向に分子が配向した異方性フィルムを透過し、た後、
第1の偏光フィルノ、の偏光方向と平行または直交した
偏光方向を有する第2の偏光フィルムを透過するにあた
って、該異方性フィルムの画像形成部分において熱また
は光によって分子配向の異方性を完全にもしくは不完全
に低下させろことによって画像を記録することを特徴と
する画像記録方法を提供する。(Means for Solving the Problem) That is, the present invention provides an anisotropic film in which the light transmitted through the first polarizing film has molecules oriented in a direction of approximately 45° with respect to the polarization direction of the first polarizing film. and after that,
When the light passes through a second polarizing film having a polarization direction parallel or perpendicular to the polarization direction of the first polarizing film, the anisotropy of the molecular orientation is completely removed by heat or light in the image forming part of the anisotropic film. To provide an image recording method characterized by recording an image by gradually or incompletely lowering the image.
また、本発明は互いに平行または直交する2枚の偏光フ
ィルムの間に分子配向異方性フィルムを挟持する積層フ
ィルムにおいて、該分子配向異方性フィルムが該偏光フ
ィルムの偏光方向に対しほぼ45°の分子配向異方性を
有しかつ熱または光によって画像形成部分の分子配向の
異方性を完全にもしくは不完全に低下させろことを特徴
とする画像記録用積層フィルムを提供する。The present invention also provides a laminated film in which a molecularly oriented anisotropic film is sandwiched between two polarizing films parallel or orthogonal to each other, wherein the molecularly oriented anisotropic film is approximately 45 degrees to the polarization direction of the polarizing film. Provided is a laminated film for image recording, which has a molecular orientation anisotropy of 100% and is characterized in that the anisotropy of molecular orientation in an image forming portion is completely or incompletely reduced by heat or light.
発色の原理は分子配向異方性フィルムの分子配向方向に
起因して起こるものであり、その配向を熱または)して
完全にもしくは不完全に低下させることによりその部分
が発色されないかあるいは異なった色に発色されること
になり、画像が該積層フィルム中に形成される。この方
法により画像を記録することができる。The principle of color development is caused by the molecular orientation direction of the molecular orientation anisotropic film, and by completely or incompletely lowering that orientation with heat or heat, that part will not develop color or will become different. Color will develop and an image will be formed in the laminated film. Images can be recorded using this method.
本発明に使用される偏光フィルムは特に限定的ではなく
、耐熱性、耐候性、耐湿性等の製品安定性が出来るだけ
よく、また偏光度の高い市販のものを使用すればよい。The polarizing film used in the present invention is not particularly limited, and a commercially available film with good product stability such as heat resistance, weather resistance, moisture resistance, etc., and a high degree of polarization may be used.
分子配向異方性ポリマーフィル1、は通常の高分子フィ
ルムを1.5〜6倍程度−軸延伸または二軸延伸して結
晶面がフィルム面に平行に配向したしのを用いる。高分
子フィルムは延伸して異方性を示す一般の高分子ポリマ
ー、例えば塩化ビニル、ポリメチルメタクリレート、ポ
リスチレン、ポリエチレン、ポリプロピレン、ポリエヂ
レンテレフタレ−1・、ナイロン6、ポリビニルアルコ
ール等を用いることができる。また異方性に変化する効
率を−Lげるために必要に応じて可塑剤を加えたり、色
素をドープしてらよい。光崩壊性フォトポリマーを用い
て、露光により低分子量化したポリマーを熱によりさら
に分子配向異方性を低下させてもよい。まj昂1丘異性
化ポリマーを利用し、異方性とその低下の可逆変化を使
って画像を形成・消去させる方法もある。このような光
異性化ポリマーとしては小林英−らによる化繊講演集、
第44集、95頁(1987)に詳細に記載されている
。The molecular orientation anisotropic polymer film 1 is made by axially stretching or biaxially stretching an ordinary polymer film by about 1.5 to 6 times so that the crystal plane is oriented parallel to the film plane. For the polymer film, use a general polymer that exhibits anisotropy when stretched, such as vinyl chloride, polymethyl methacrylate, polystyrene, polyethylene, polypropylene, polyethylene terephthalate-1, nylon 6, polyvinyl alcohol, etc. Can be done. Furthermore, in order to increase the efficiency of anisotropic change, a plasticizer may be added or a dye may be doped as necessary. Using a photodegradable photopolymer, the molecular orientation anisotropy of a polymer whose molecular weight has been reduced by exposure to light may be further reduced by heat. There is also a method of forming and erasing images using isomerized polymers and reversible changes in anisotropy and its reduction. Such photoisomerizable polymers are described in the collection of lectures on chemical fibers by Hide Kobayashi et al.
It is described in detail in Vol. 44, p. 95 (1987).
本発明の画像記録方法では2枚の偏光フィルムを互いに
平行もしくは直交するように組み合イつせ、その間に分
子配向異方性フィルノ、を45°の角度をなずように挿
入される。平行、直交および45゜の角度は厳格には規
定されず、かなり幅があるものと考えられる。したがっ
て45°の場合前後10゛近くの幅があると考えてもよ
い。偏光フィルムを2枚用いる方法以外に、偏光フィル
ムと反射板の間に分子配向異方性フィルムを配置しても
同様の画像の記録が可能である。反射板を用いる場合に
は反射板はアルミフィルムを蒸着した部子なものであっ
てよい。もちろん鏡等の反射板を用いてもよい。In the image recording method of the present invention, two polarizing films are combined so as to be parallel or orthogonal to each other, and a molecular orientation anisotropic film is inserted between them at an angle of 45°. Parallel, perpendicular and 45° angles are not strictly defined and are considered to have a wide range. Therefore, in the case of 45 degrees, it can be considered that there is a width of nearly 10 degrees from front to back. In addition to the method of using two polarizing films, similar images can be recorded by disposing a molecular orientation anisotropic film between the polarizing film and the reflecting plate. When a reflector is used, the reflector may be a component on which an aluminum film is vapor-deposited. Of course, a reflecting plate such as a mirror may also be used.
分子配向異方性フィルムは熱または光の働きにより画像
形成部分の分子配向異方性が解消されている。異方性の
低下は完全にもしくは不完全に行なう。不完全に行う場
合には多少の分子配向性が残り、異なる色の発色の可能
性があり、カラー画像を形成1−ることかできる。異方
性が完全に低下し等方性になった場合には画像部分は基
本的には黒ないしは無色透明ということになる。熱をか
(jる方法は種々の方法が考えられるか、−射的にはヒ
ートモードレーザーあるいは熱ヘツドを用いてフィルム
中に画像を形成する部分の分子配向異方性を低下させれ
ばよい。光を用いる場合はレーザー光を用いるデジタル
画像記録あるいは水銀灯を用いるアナログ画像記録が適
用できる。In the molecular orientation anisotropic film, the molecular orientation anisotropy in the image forming area is eliminated by the action of heat or light. The anisotropy may be reduced completely or incompletely. If this is done incompletely, some degree of molecular orientation remains, which may result in the development of different colors, making it impossible to form a color image. When the anisotropy is completely reduced and the image becomes isotropic, the image area will basically be black or colorless and transparent. Various methods can be considered for applying heat, or - thermally, a heat mode laser or a thermal head may be used to reduce the molecular orientation anisotropy of the portion of the film where an image is to be formed. When using light, digital image recording using a laser beam or analog image recording using a mercury lamp can be applied.
(発明の作用)
本発明の画像記録方法は第2図(a)および(b)に示
すように2つの偏光フィルム1,3の間に分子−配向異
方性ボリマー2を狭んだものを考え、第2図(b)のよ
うにその分子配向異方性を熱ないし光により部分的に低
下させれば、第2図(c)のようにその部分の発色が起
こらないことになり第2図(e)の如き画像が形成およ
び記録される。2枚の偏光フィルムを用いる場合、偏光
フィルムを互いに直交にすればポリマーの異方性が低下
した部分の光は透過しなくなり、得られた画像は第2図
(e)に示すようにボジチブ画像が形成されるが、逆に
偏光フ。・ルムを平行にすると、異方性が低下した部分
はそのまま光を透過しネガチブ画像となる。(Function of the Invention) The image recording method of the present invention uses a molecular-orientation anisotropic polymer 2 sandwiched between two polarizing films 1 and 3 as shown in FIGS. 2(a) and 2(b). Considering that, if the molecular orientation anisotropy is partially reduced by heat or light as shown in Figure 2(b), no color development will occur in that part as shown in Figure 2(c). An image as shown in FIG. 2(e) is formed and recorded. When using two polarizing films, if the polarizing films are orthogonal to each other, light from areas where the anisotropy of the polymer is reduced will no longer be transmitted, and the resulting image will be a positive image as shown in Figure 2(e). is formed, but on the other hand, polarized light is formed.・If the lumes are made parallel, light will pass through the areas where the anisotropy has decreased, resulting in a negative image.
(発明の効果)
本発明によれば、偏光フィルムの偏光軸を変化させるこ
とによりボジヂブおよびネガチブ両タイプの記録材料が
容易に作成することができる。また偏光フィルムおよび
分子配向フィルムは一般工業薬品が使用できるので安価
であり、大面積化も可能である。また、本発明の方法に
よれば銀塩写真にみられるような、特異な現像および定
着工程が必要でなく、工程を簡素化することができる。(Effects of the Invention) According to the present invention, both positive and negative types of recording materials can be easily produced by changing the polarization axis of a polarizing film. In addition, since general industrial chemicals can be used for the polarizing film and the molecularly oriented film, they are inexpensive and can be made to have a large area. Further, according to the method of the present invention, special developing and fixing steps as seen in silver halide photography are not required, and the steps can be simplified.
更に、基本的には物理的な画像形成方法によるものであ
−)で化8と反応を用いていないため製品の安定性が極
めてよい。熱および光の照射量を制御することにより限
られた範囲ではあるが画像が適当な色を持つことができ
、色材を使わないで多彩な色を発現できる記録材料が可
能になる。また、白黒の場合はコントラストの高い画像
が形成されるので、PS平版材等の製版に利用すること
ができる。Furthermore, since it is basically based on a physical image forming method and does not involve chemical reaction (8), the stability of the product is extremely good. By controlling the amount of heat and light irradiation, an image can have an appropriate color, albeit within a limited range, and it becomes possible to create a recording material that can express a wide variety of colors without using colorants. Furthermore, in the case of black and white, since a high contrast image is formed, it can be used for plate making of PS lithographic materials and the like.
(実施例) 本発明を実施例により更に詳細に説明する。(Example) The present invention will be explained in more detail with reference to Examples.
γ饗桝上
2枚の直交位偏光フィルム間に一軸延伸法により作成し
たポリエチレン系異方性ポリマーフィルムを接石剤を使
ってラミネートし、淡黄色透明の積層フィルムを得た。A polyethylene-based anisotropic polymer film prepared by uniaxial stretching was laminated between two orthogonal polarizing films on a γ-pan using a grating agent to obtain a pale yellow transparent laminated film.
このフィル1、に半導体レーザーを使用して第3図に示
すように露光した。露光後の状態を第3図に示す。This film 1 was exposed to light using a semiconductor laser as shown in FIG. The state after exposure is shown in FIG.
」聰−乳
偏光フィルムを直交位から平行位に代えること以外は実
施例1と同様に処理した。積層フィルムは濃青色透明を
示した。露光後の状態を第3図に示す。The process was carried out in the same manner as in Example 1, except that the polarizing film was changed from orthogonal to parallel. The laminated film exhibited deep blue color and transparency. The state after exposure is shown in FIG.
実施例3
2枚の直交位偏光フィルノ・の間に、−軸延伸法により
作成した光崩壊性ポリマー(ヘキサクロロアセトンで処
理した塩化ビニル)を接着剤を使ってラミネートし、淡
黄色透明の積層フィルムを得た。このフィルムにUVレ
ーザーを露光した後、フィルム全体を100℃で加熱し
た。処理後の状態を第3図に示す。Example 3 A photodegradable polymer (vinyl chloride treated with hexachloroacetone) prepared by a -axial stretching method was laminated between two orthogonally polarized films using an adhesive to form a pale yellow transparent laminated film. I got it. After exposing this film to UV laser, the entire film was heated at 100°C. The state after treatment is shown in FIG.
実施例4
偏光フィルム上に下記構造をもつ光異性化ポリマーを薄
膜化し、その−にに偏光フィルムを直交位になるように
ラミネートし、淡黄色透明の積層フィルムを得た。Example 4 A photoisomerizable polymer having the following structure was formed into a thin film on a polarizing film, and the polarizing film was laminated on the film in a perpendicular position to obtain a light yellow transparent laminated film.
〔式中、n=11〜13〕
このフィルムに572nmの光を照射した。続いて54
6nmの光を照射した。照射後の状態を第3図に示す。[In the formula, n=11 to 13] This film was irradiated with 572 nm light. followed by 54
It was irradiated with 6 nm light. Figure 3 shows the state after irradiation.
実施例5
2枚の平行位偏光フィルム間に、−軸延伸法により作成
したポリビニルアルコール異方性ポリマ−フィルムを接
着剤を使ってラミネートし、緑色透明の積層フィルムを
得た。このフィルムに実施例1で露光したヒートモード
レーザーの約1/2、約1/3時間の露光を行った。露
光後の状態を第3図に示す。Example 5 A polyvinyl alcohol anisotropic polymer film prepared by a -axis stretching method was laminated between two parallel polarizing films using an adhesive to obtain a green transparent laminated film. This film was exposed to light for about 1/2 or about 1/3 of the heat mode laser exposure time used in Example 1. The state after exposure is shown in FIG.
第1図は本発明方法の発色の基本原理を説明する図であ
る。
第2図は本発明方法により画像か記録される様子を説明
する図である。
第3図は実施例の露光の状態および露光後の画像記録の
状態を示す図である。FIG. 1 is a diagram explaining the basic principle of color development according to the method of the present invention. FIG. 2 is a diagram illustrating how an image is recorded by the method of the present invention. FIG. 3 is a diagram showing the exposure state and the image recording state after exposure in the example.
Claims (1)
ルムの偏光方向に対してほぼ45°の方向に分子が配向
した異方性フィルムを透過した後、第1の偏光フィルム
の偏光方向と平行または直交した偏光方向を有する第2
の偏光フィルムを透過するにあたって、該異方性フィル
ムの画像形成部分において熱または光によって分子配向
の異方性を完全にもしくは不完全に低下させることによ
って画像を記録することを特徴とする画像記録方法。 2、互いに平行または直交する2枚の偏光フィルムの間
に分子配向異方性フィルムを狭んだ積層フィルムにおい
て、該分子配向異方性フィルムが該偏光フィルムの偏光
方向に対しほぼ45°の分子配向異方性を有しかつ熱ま
たは光によって画像形成部分の分子配向の異方性を完全
にもしくは不完全に低下させることを特徴とする画像記
録用積層フィルム。 3、請求項1記載の画像記録方法において、第1の偏光
フィルムを通過した光が異方性フィルムを通過した後、
反射板により反射して第1の偏光フィルムに戻る画像記
録方法。 4、請求項2記載の画像記録用積層フィルムにおいて、
2枚の偏光フィルムのいずれか一方を反射板に代える画
像記録用積層フィルム。[Claims] 1. After the light that has passed through the first polarizing film passes through an anisotropic film in which molecules are oriented in a direction approximately 45° to the polarization direction of the first polarizing film, A second polarizer having a polarization direction parallel or orthogonal to the polarization direction of the polarizing film.
image recording characterized by recording an image by completely or incompletely lowering the anisotropy of molecular orientation by heat or light in the image forming part of the anisotropic film when transmitting through a polarizing film. Method. 2. In a laminated film in which a molecularly oriented anisotropic film is sandwiched between two polarizing films that are parallel or orthogonal to each other, the molecularly oriented anisotropic film has molecules at approximately 45° with respect to the polarization direction of the polarizing film. 1. A laminated film for image recording, which has orientation anisotropy and is characterized in that the anisotropy of molecular orientation in an image forming area is completely or incompletely reduced by heat or light. 3. In the image recording method according to claim 1, after the light that has passed through the first polarizing film passes through the anisotropic film,
An image recording method in which the image is reflected by a reflector and returned to the first polarizing film. 4. The image recording laminated film according to claim 2,
A laminated film for image recording in which one of two polarizing films is replaced with a reflective plate.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28060389A JP2922937B2 (en) | 1989-10-27 | 1989-10-27 | Image recording method and laminated film used therefor |
DE69022532T DE69022532T2 (en) | 1989-10-27 | 1990-10-25 | Image recording method and film structure therefor. |
EP90311700A EP0425287B1 (en) | 1989-10-27 | 1990-10-25 | Process for recording an image and film structure therefor |
CA002028672A CA2028672A1 (en) | 1989-10-27 | 1990-10-26 | Process for recording an image, a film structure therefor and its application |
US07/603,841 US5049927A (en) | 1989-10-27 | 1990-10-29 | Process for recording an image, a film structure therefor and its applications |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP28060389A JP2922937B2 (en) | 1989-10-27 | 1989-10-27 | Image recording method and laminated film used therefor |
Publications (2)
Publication Number | Publication Date |
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JPH03141320A true JPH03141320A (en) | 1991-06-17 |
JP2922937B2 JP2922937B2 (en) | 1999-07-26 |
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JP28060389A Expired - Fee Related JP2922937B2 (en) | 1989-10-27 | 1989-10-27 | Image recording method and laminated film used therefor |
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JP (1) | JP2922937B2 (en) |
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US8477423B2 (en) | 2008-01-22 | 2013-07-02 | Fujifilm Corporation | Method of producing a patterned birefringent product |
CN103513416A (en) * | 2012-06-28 | 2014-01-15 | 佛山正能光电有限公司 | Multilayer pattern display device |
JP2016173582A (en) * | 2010-06-30 | 2016-09-29 | スリーエム イノベイティブ プロパティズ カンパニー | Diffuse reflective optical films with spatially selective birefringence reduction |
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- 1989-10-27 JP JP28060389A patent/JP2922937B2/en not_active Expired - Fee Related
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EP1925954A2 (en) | 2006-11-21 | 2008-05-28 | FUJIFILM Corporation | Process of producing patterned birefringent product |
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US8477423B2 (en) | 2008-01-22 | 2013-07-02 | Fujifilm Corporation | Method of producing a patterned birefringent product |
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TWI480623B (en) * | 2008-03-18 | 2015-04-11 | Fujifilm Corp | Method of producing a patterned birefringent product and a product made therefrom |
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JP2016173582A (en) * | 2010-06-30 | 2016-09-29 | スリーエム イノベイティブ プロパティズ カンパニー | Diffuse reflective optical films with spatially selective birefringence reduction |
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US20170001461A1 (en) * | 2014-03-26 | 2017-01-05 | Toppan Printing Co., Ltd. | Anti-counterfeiting medium and method for fabricating anti-counterfeiting medium |
US10414195B2 (en) * | 2014-03-26 | 2019-09-17 | Toppan Printing Co., Ltd. | Anti-counterfeiting medium and method for fabricating anti-counterfeiting medium |
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JP2922937B2 (en) | 1999-07-26 |
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