578014 B7 五、發明說明（） [發明的詳細說明] 本發明關於一種申請專利範圍第1項的引文的一種可 呈光學方式變化的平面圖案。 這類平面圖案含有構造，大多呈微視細微的浮雕 (Relief)構造，它們將照射到其上的光折射。舉例而言，這 種繞射式圖案適合當作真實無訛性及安全特徵以提高防僞 的安全性。它們特別適合作有價證券(Wertpapier)、鈔票、 付款手段、身分證、通行證(Passe)等。 作爲真實無訛性特點的功能在於：使設有該平面圖案 的物品（如鈔票）的檢出器具有感覺，能測知該物品係爲真 實而非僞造的。作爲安全特點的功能在於：將未授權的仿 冒行爲防止或者至少使之極端困難。 這類平面圖案見於許多來源；其代表性例子此處可列 舉歐洲專利案 EP 0 105 099 B卜 EP 0 330 738 Bl、EP 0 375 833 B1。其特點在圖案光輝燦爛及圖案會因移動位置看而 呈變化的效果，它們埋設到一薄塑膠層片中且呈一種標記 形式黏貼到文件(如鈔票、有價證券、個人證明、通行證' 簽證、身分證等)上。製造該安全元件所用的材料見於歐汾丨 專利案 ΕΡ0 201 323 B1。 一種圖元（像素）朝向(pixel-oriented)的可呈光學方式^ 化的平面圖案發表於歐洲專利案EP 0 375 833 B1。此類EP 0 375 833 B1平面圖案包含預設數目N的各種不同的影像 。該平面圖案分劃成多數像素。各像素再劃分N個次像# (Unterpixel英：subpixel)，其中該N個影像之一影像的一個 3 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------裝--------tr.---------線 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 ____B7___ 五、發明說明（） 影像點(Bildpunkt)與一個像素的N個次像素中的各個次像 素相關聯。各次像素包含一種折射構造，呈一種微視細微 的浮雕形式，該浮雕刻含有關於一彩色値、亮度値的分段 、及觀看方向的資訊。對於該平面圖案的觀看者而言，經 常只呈現單一個影像，其中各可見的影像可藉著將該平面 圖案傾斜或轉動或改變觀看者的視角而改變。 日本專利特(實？)公(開？)平-10-153702提到了一種特別 的繞射圖案，它施在一基板的表面。在此該基板分成小的 面積區域。在各面積區域中施有一種折射格柵。折射格柵 的朝向從一面積區域到另一面積區域有變化。如此，各依 該基板沿水平面的那個方向轉動而定，一個面積區域或另 一個面積區域顯得較亮或較暗。 藉由觀看這種效果，觀看者可分辨影印本與正本。 德國專利案DE 44 46 368 A1發表了一種資料載體，它 具有一種可呈光學方式變化的平面圖案，它一方面有一個 面，將入射光定向反射，另一方面將該光散射。在此該定 向反射的面可具有一種鋸齒廓形或一種折射格柵。被該反 射面所反射的光束的強度走勢(它與觀看角度有關）係與該 在所觀看角度時大致恒定的強度（它由該散射的面產生）重 合。因此對觀看者而言，依觀看角度而定而產生一種印象 :在特定角度時，該反射面顯得比該散射面更亮。 因此一種此類的可呈光學方式變化的元件很難影印， 因爲用一般影印機影印的影印本在所有的觀看角度下始終 都可以看到相同的資訊內容。 4 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公f ) ---------------------訂 ------- (請先閱讀背面之注意事項再填寫本頁) 578014 A7 ____B7____ 五、發明說明（) 國際專利案WO 99/38039提到了一種表面圖案，它由 許多影像元件組成。各影像元件的表面構成一種不對稱的 折射格柵。這些折射格柵的朝向的不同處在方位角(Azimut) 如此產生與視角有關的亮度差異。 藉由觀看這種效果，觀看者分辨影印本與正本。 本發明的目的在於提供一種可呈光學方式變化的平面 圖案，它具有較佳的防止影印的保護作用。 這種目的依本發明係利用申請專利範圍第1項的特徵 點達成。 一種折射光學效果的平面圖案由一種背景及一種位在 該背景上的影像資訊構成。一般的觀看條件下，入射到該 背景上或影像資訊上的光係折射到不同方向，因此觀看者 可讀出該影像資訊。本發明茲根據一個觀念：將該含有背 景及含有影像資訊的折射構造設計成使得它們全部在用彩 色影印機影印時都使彩色影印機的光二極體飽和，因此影 印本並不呈具有影像資訊的背景，而係呈一個無對比的面 〇 適用的折射構造爲墊紙(Matt,英：mat)構造，特別是各 向異性的墊紙構造。這些墊紙構造係爲浮雕構造，該浮雕 構造浮雕構造的廓形參數…如廓形長度與廓形高度…呈一 種統計學方式的分佈，因此它們將入射光沿方位角呈各向 同性或各向異性方式散射。在此，「各向異性」表示：該 墊紙構造的浮雕構造有一較優勢方向。這種作用使得在一 般的觀看條件下，入射光並不均勻地折射到所的方向，而 5 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ---------------------訂--------- (請先閱讀背面之注意事項再填寫本頁) 578014 A7 _____B7- ------ 五、發明說明（） 係較偏好垂直於該浮雕構造的該較優勢方向折射°如果此 處在一實施例中該背景由第一種墊紙構造構成’它具有第 一種優勢方向，而該影像資訊由第二種墊紙構造構成’它 與第一種墊紙構造不同處只在於：它具有另一種優勢方向 ，則該景與該影像資訊對一觀看者而言顯得不一樣亮。因 此該影像資訊可看到及可讀取。但第一墊紙構造的散光能 力與第二墊紙構造的散光能力夠大，以使得在用彩色影印 機影印時造成飽和。因此背景與影像資訊在該影本上呈— 個均勻的亮面形式。影像資訊完全失去。 在另一實施例中，該背景與該影像資訊具有各向同性 的墊紙構造，但它們具有不同的散射能力。在此該散射能 力選設成使得人眼不藉助工具可看出散射能力的不同，呈 對比方式，因此可看到影像資訊，但其中二種墊紙構造的 散光能力足夠使彩色影印機的光二極體飽和。 以下配合圖式詳細說明本發明的實施例： 圖式中： 第1圖A，B係墊紙構造的散光能力的走勢圖， 第2圖係一個具有影像資訊與一背景的平面圖案的上 視圖， 第3圖係該平面圖案的外觀橫截面圖， 第4圖係在影印時的性質， 第5圖A該背景的一個像素， 第5圖B該影像資訊的一個像素， 第6圖係一文件。 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -------------裝--------tr----------線 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 B7 五、發明說明（） [圖號說明] (1) 寬強度曲線 ⑵ 狹強度曲線 (3) 水平線(飽和位準) (4) 角度範圍 (5) 強度曲線 (6) 強度曲線 ⑺ 平面圖案 (8) 背景 (9) 影像資訊 (10) 漆層 (11) 反射層 (12) 蓋層 (13) 浮雕構造 (14) 像素 (15) .彩色影印機 (16) 玻璃板 (17) 文件 (18) 滑架 (19) 光源 (20) 偏向面鏡 (21) 檢出器 (22) 光感測器 (23) 光 7 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 578014 A7 B7 五、發明說明（） (24) 半空間 (25) 影像像素 (26) 背景像素 (27) 次像素 (28) 文件 [實施例的說明] 第1圖A顯示一個各向異性的墊紙構造在光垂直入射 到該墊紙構造上時的情形。該各向異性的墊紙構造由浮雕 構造構成，該浮雕構造有一優勢方向。其作用係使得在一 般照明條件下入射的光並不均勻地折射到所有的方向，而 係偏好折射到垂直於浮雕構造的優勢方向的方向。對於光 垂直入射到墊紙構造上的情形，該各向異性的墊紙構造上 折射到該墊紙構造上方的半空間的光的強度係呈距穹頂 (Zenit,英：zenith)的角度距離(5 (以度爲單位）的函數。較寬 的強度曲線1對應於垂直於該各向異性的墊紙構造的浮雕 構造的優勢方向的光分佈。較窄的強度曲線2對應於沿該 各向異性的墊紙構造的浮雕構造的優勢方向的光分佈。水 平線標示出一彩色影印機的光二極體的飽和位準。如第1 圖所示·在一角度範圍處，該彩色影印機將各向異性的墊紙 構造以相同的亮度成像，而出目者用肉眼在此角度範圍4 中看到的亮度差異呈明顯對比差異，因爲在一般照明條件 下在眼睛並不發生飽和效應。該角度範圍4的大小和各向 異性的程度有關。該角度範圍4的典型値爲15°〜35° 。 8 _________ -二 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） - - - - . ---------------------訂--------•線 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 ____B7_—…一--- 五、發明說明（) 該墊紙構造，舉例而言，具有橢圓體形狀(且因此呈長 形)的隆起部，其長度與寬度一樣大。該長度與寬度都是呈 統計學方式分佈。但對於該隆起部有一共同點爲朝向’換 言之，該橢圓體的長軸近乎沿相同方向延伸° 第1圖B顯示當光垂直入射到二個各向同性的墊紙構 造上時，該二個各向異性的墊紙構造的散射能力。該各向 異性的墊紙構造上折射到該墊紙構造上方的半空間的光的 強度也係呈距天頂的角度距離5的函數。一個各向同性的 墊紙構造的浮雕構造在方位角方面沒有優勢方向。因此該 二條強度曲線5與6與方位角無關，亦即不受墊紙構造平 面中的浮雕構造的朝向的影響。因此該各向同性的墊紙構 造將垂直入射的光在方位角方面呈各向同性方式折射。在 這二種各向同性的墊紙構造中的不同點係基於不同的回散 射(Riickstreu)能力。如第1圖B所示，該二種各向同性的 墊紙構造的光強度係在於一彩色影印機的光二極體的飽和 位準3上方該彩色影印機的角度範圍4,因此該二個各向 同性的墊紙構造在一影印本中呈相同亮度成像，而一位觀 看者不藉助工具的肉眼在此情形中也能淸楚看出亮度不同 〇 第2圖顯示一個平面圖案7的外觀圖，其面積劃分成 不同的影像區域，這些影像區域定出一影像資訊9，可由 人眼相對於該背景8作區別而看出。在此情形中，該影像 資訊9由分別的字母構成’它們構成VALID字樣。這些定 出該影像資訊9的字母由一第一墊紙構造構成，它將垂直 9 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） I I I — — — — — — — — — — ·1111111 ·1111111 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 ^__B7_ 五、發明說明（） 入射的光以各向異性方式折射。因此該第一墊紙構造將光 主要(但不是惟一地)折射到一第一方向。背景8由一第二 墊紙構造構成，它的朝向與第一墊紙構造不同。因此它將 垂直入射的光主要折射到一個與第一方向不同的方向。 如第三圖的橫截面所示，該平面圖案宜設計成層複合 物的方式。該層複合物由一第一漆層10、一反射層11、及 一個作蓋層12用的第二漆層構成。該平面圖案的影像區域 的墊紙構造整體利用微視細微的浮雕構造13做成。反射層 11使該浮雕構造13變成反射光的構造。漆層10宜爲一黏 著劑層，因此該層複合物可直接黏合到一基板上。蓋層12 宜完全蓋住該浮雕構造13。此外，它在可見光的頻域的光 折射指數宜爲至少1.5，如此該幾何廓形高度h產生儘可能 大的具光學效果的廓形高度。此外該蓋層12當作耐刮傷的 保護層。 舉例而言，該平面圖案可用以下方式製造：將該平面 圖案呈矩陣狀劃分成多數A = n* m個像素14(第2圖），然 後一個鐫印壓模[其鐫印面積對應於一個像素的面積]將一 個接一個的像素14鐫印到一張熱塑性塑膠的箔片中。爲了 使圖式簡單明瞭起見，只顯示其中一些像素14。在鐫印這 些與背景8相關的像素14時，該鐫印壓模佔住一個第一旋 轉位置，而它在鐫印與影像資訊9相關的像素14時則佔住 一個第二旋轉位置。舉例而言，該二旋轉位置隔了一角度 ，在10°〜90°的範圍，例如隔了 20° ，因此該二個各向 異性的墊紙構造的優勢方向隔了 20° 。將所有的像素14 10 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ---------------------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 ___B7 _ 五、發明說明（） 鐫印後，由該熱塑性塑膠的箔片以習知的方式做成一個鐫 印矩陣。 有關製造這種平面圖案的方法的進一步的細節’舉例 而言可見於歐洲專利案EP 0 105 099 Bl、EP 0 375 833 B1 與 EP 0 201 323 B卜 第4圖以示意圖方式顯示當利用一影印機，例如一彩 色影印機15影印時的幾何性質。該彩色影印機15有一玻 璃板16及一滑架18，所要影印的文件17-…例如一張鈔票 -…放在該玻璃板16上，該滑架18可沿一 X方向移行， 且該滑架18包含一光源19、一偏轉面鏡20、及一個具有 光感測器22的檢出器21。在影印時，由光源19發出的光 23以一定的角度斜斜入射到該文件17上，因此也斜斜地 入射到在該文件17上具有各種不同朝向的墊紙構造的平面 圖案7上。入射光的一部分垂直向下折射，並經由該偏轉 面鏡20成像到該彩色影印機15的光感測器22上。該二個 墊紙構造的折射效率遠比圍繞著平面圖案7的區域部分的 大得多，在該圍繞著平面圖案7的區域部分中，光並不折 射，而只散射。即使在該墊紙構造上折射的光只有一小部 分入射到彩色影印機15的光感測器22上，這麼一小部分 也足夠使該光感測器22飽和。因此，與平面圖案7對應的 面積部分在影印本上呈均勻亮面。因此該影像資訊在影印 時就失去。 該墊紙構造將光勻勻地折射到該平面圖案7(呈一種折 射格柵的形式)上方的半空間24中，因此它們有一個很大 11 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ---------------------tl.---------線 (請先閱讀背面之注意事項再填寫本頁) 578014 A7 _______B7_______ 五、發明說明（） 優點，即：要完成本發明，所需的效果並不受到維持一定 的照明條件與否的影響。換言之，即使影印時由於件何原 故使照明角度改變，光仍然充分地折射到該檢出器21中。 在一種有利的設計中’該平面圖案7由影像像素25(如 第5圖A與第5圖B所示，它們用於產生影像資訊9)以及 背景像素26(它們產生背景8)構成。該影像像素25與背景 像素26各分劃成四個次像素27。一個次像素27的典型度 量尺寸爲，因此一個像素的四個次像素27 用人眼不能分別用人眼看出。各影像像素25的三個次像素 27包含一個具一第一優勢方向的第一墊紙構造’該影像像 素25的第四個次像素27包含第二墊紙構造，它具有一第 二優勢方向，與該第一優勢方向不同。而在背景像素26的 情形則相反。此處該三個次像素27包含第二墊紙構造’而 背景像素26的第四個次像素27則含有第一墊紙構造。第 一與第二優勢方向夾成一角度0，使得觀看者看到一個影 像像素25呈亮點而一個背景像素26呈暗點，或者反之。 當平面圖案7在其平面中旋轉0角或旋轉180° +Θ時，影 像素25與背景像素26的亮度値會混淆。在次像素27中的 墊紙構造的朝向利用一箭頭表示。因此該產生背景8的勢 紙構造與該產生影像資訊9的墊紙構造包含一部分相同的 墊紙構造。 在此實施例中，所有的影像區域，亦即背景8與影像 資訊9，將光折射到二個優勢方向，但係爲不同的比例。 然而由於如此所產生的對比，人眼仍能區別影像資訊9與 12 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） - - ' , --------------裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 578014 五 A7 B7 發明說明（） 背景8。由於各影像素25與各背景像素26 3有至少個 具有第一墊紙構造的次像素27與至少一個具有第二墊紙構 造的次像素27 ,因此在影印時，所有影像素25與背景像 素26將光折射到相關的光感測器22並使所有的相關的光 感測器22飽和，因此該影印的平面圖案7在影印本上呈無 對比的亮面。 在另一實施例中，只有該第一墊紙構造爲一種各向異 性方式折射的墊紙構造，而該第二墊紙構造則爲一種各向 同性方式折射到該半空間24中的墊紙構造。在此情形中， 由於不同的對比，人眼也看到該平面圖案7的影像資訊9 與背景8，而彩色影印機15由於其光感測器飽和’不能看 出這種對比差別。 在又一實施例中該第一墊紙構造與第二墊紙構造都是 各向同性的墊紙構造，但具有不同的回散射能力。 本發明也可用於把影印本上的資訊的意義內容改成和 正本上者不同。第6圖的例子顯示具有該平面圖案7的文 件28的一部分。文件28上印有字串「這是影印本」（Dies ist eine Kopie)。平面圖案7位在字串的「是」（德文字eine) 前面，其中該平面圖案9的的影像資訊9表示「不」字(字 母k)。因此當觀看該文件時，觀看者看到這樣的句子「這 不是影印本」（Dies ist ireine Kopie)。但在影印本上卻呈現 這樣的句子「這是影印本」（Dies ist eine Kopie)。 13 本紙張尺度適用中國國家標準（CNS)A4規格（210 χ 297公釐） --------I----· I I (請先閱讀背面之注意事項再填寫本頁) 訂： .線·578014 B7 V. Description of the invention () [Detailed description of the invention] The present invention relates to a quotation which can be optically changed in a citation of item 1 of the scope of patent application. These flat patterns contain structures, most of which are microscopic relief structures, which refract the light that strikes them. For example, this diffraction pattern is suitable for authenticity and security features to improve the security of anti-counterfeiting. They are especially suitable for securities (Wertpapier), banknotes, payment methods, ID cards, Passes, etc. As a feature of authenticity, the function is to make the detector of the article (such as a banknote) with the flat pattern feel, and to detect that the article is real, not counterfeit. The function as a security feature is to prevent or at least make it extremely difficult for unauthorized counterfeiting. Such flat patterns are found in many sources; representative examples are listed here in European patents EP 0 105 099 B, EP 0 330 738 Bl, EP 0 375 833 B1. Its characteristics are the brilliant effect of the pattern and the effect that the pattern will change depending on the movement position. They are embedded in a thin plastic layer and pasted to a document in the form of a mark (such as banknotes, securities, personal certificates, passports, Identity card, etc.). The materials used to make this security element are found in the patent case EP0 201 323 B1. A pixel-oriented planar pattern that can be optically converted is published in European Patent EP 0 375 833 B1. This EP 0 375 833 B1 planar pattern contains a variety of different images with a preset number N. The planar pattern is divided into a plurality of pixels. Each pixel is further divided into N sub-images (Unterpixel, subpixel), in which one of the N images is one of the 3 paper sizes applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) ---- ---------- install -------- tr .--------- line (please read the notes on the back before filling this page) 578014 A7 ____B7___ V. Invention Explanation () The image point (Bildpunkt) is associated with each of the N sub-pixels of a pixel. Each sub-pixel contains a refraction structure in the form of a microscopic relief, which contains information about a color 値, brightness 値 segment, and viewing direction. For a viewer of the planar pattern, often only a single image is presented, wherein each visible image can be changed by tilting or rotating the planar pattern or changing the perspective of the viewer. Japanese Patent Application (Open?) Hei-10-153702 mentions a special diffraction pattern applied to the surface of a substrate. The substrate is here divided into small areas. A refractive grid is applied in each area. The orientation of the refraction grid varies from one area to another. Thus, depending on which direction the substrate is rotated in the horizontal plane, one area area or the other area area appears brighter or darker. By watching this effect, the viewer can distinguish the photocopy from the original. The German patent application DE 44 46 368 A1 discloses a data carrier having a planar pattern that can be optically changed. It has a surface on one side that reflects incident light directionally and scatters it. The directional reflecting surface may have a sawtooth profile or a refractive grid. The intensity trend of the light beam reflected by the reflecting surface (which is related to the viewing angle) coincides with the roughly constant intensity at the viewing angle (which is generated by the scattering surface). So for the viewer, depending on the viewing angle, an impression is produced: at a specific angle, the reflective surface appears brighter than the scattering surface. Therefore, it is difficult to make a photocopy of such an optically changeable component, because a photocopy made by a general photocopier can always see the same information content at all viewing angles. 4 This paper size applies to China National Standard (CNS) A4 specification (210 X 297 male f) --------------------- Order ------- ( (Please read the notes on the back before filling this page) 578014 A7 ____B7____ 5. Description of the Invention () The international patent case WO 99/38039 mentions a surface pattern, which is composed of many image elements. The surface of each image element forms an asymmetric refraction grid. The orientation of these refraction grids differs in the azimuthal angle (Azimut), which produces a difference in brightness depending on the viewing angle. By watching this effect, the viewer distinguishes the photocopy from the original. An object of the present invention is to provide a planar pattern that can be optically changed, which has a better protection function against photocopying. This object is achieved according to the present invention by using the feature point of the first patent application scope. A flat pattern of refracting optical effects is composed of a background and image information located on the background. Under normal viewing conditions, the light incident on the background or image information is refracted to different directions, so the viewer can read out the image information. The present invention is based on an idea: the refractive structures containing the background and the image information are designed so that all of them saturate the photodiodes of the color photocopier when they are photocopied with the color photocopier, so the photocopies are not presented with image information. The background is a non-contrast surface. The suitable refraction structure is a mat paper structure, especially an anisotropic mat paper structure. These padding structures are embossed structures whose profile parameters ... such as profile length and profile height ... are distributed in a statistical manner, so they illuminate the incident light isotropically or azimuthally along the azimuth. Anisotropic scattering. Here, "anisotropic" means that the relief structure of the paper pad structure has a more advantageous direction. This effect makes the incident light not uniformly refracted in all directions under normal viewing conditions, and the 5 paper sizes apply the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ------ --------------- Order --------- (Please read the notes on the back before filling this page) 578014 A7 _____ B7- ------ V. Description of the invention () is the refraction preferred to the dominant direction perpendicular to the relief structure. If the background in this embodiment consists of the first pad structure, it has the first dominant direction, and the image information It is composed of the second type of paper pad structure. It is different from the first type of paper pad structure only in that it has another advantageous direction, and the scene and the image information are not as bright to a viewer. The image information is therefore visible and readable. However, the astigmatism capacity of the first pad structure and the second pad structure are sufficiently large to cause saturation when copying with a color photocopier. Therefore, the background and image information appear on the film as a uniform bright surface. Image information is completely lost. In another embodiment, the background and the image information have an isotropic pad structure, but they have different scattering capabilities. Here, the scattering ability is selected so that the human eye can see the difference in scattering ability without the aid of a tool, in a contrasting manner, so that the image information can be seen, but the scattering ability of the two padding structures is sufficient to make the light Polar body is saturated. The following describes the embodiments of the present invention in detail with the drawings: In the drawings: FIG. 1 is a trend chart of the astigmatism capability of the paper structure of A and B, and FIG. 2 is a top view of a flat pattern with image information and a background Figure 3 is a cross-sectional view of the appearance of the flat pattern, Figure 4 is the nature of the photocopy, Figure 5 is a pixel of the background, Figure 5 is a pixel of the image information, and Figure 6 is a file. 6 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) --------------------- tr ------- --- Line (Please read the notes on the back before filling this page) 578014 A7 B7 V. Description of the invention () [Illustration of drawing number] (1) Wide intensity curve ⑵ Narrow intensity curve (3) Horizontal line (saturation level) (4) Angle range (5) Intensity curve (6) Intensity curve ⑺ Plane pattern (8) Background (9) Image information (10) Paint layer (11) Reflective layer (12) Cover layer (13) Embossed structure (14) Pixel (15). Color photocopier (16) Glass plate (17) File (18) Slide (19) Light source (20) Deflection mirror (21) Detector (22) Light sensor (23) Light 7 (Please read the precautions on the back before filling out this page) This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) 578014 A7 B7 V. Description of the invention () (24) Half space (25) Image Pixels (26) Background pixels (27) Sub-pixels (28) Document [Explanation of the Example] FIG. 1A shows an anisotropic pad structure when light is incident perpendicularly on the pad structure. The anisotropic pad structure is composed of a relief structure, which has an advantageous direction. Its function is to make the incident light not uniformly refracted in all directions under general lighting conditions, and it prefers to refract to the direction perpendicular to the dominant direction of the relief structure. In the case where light is incident perpendicularly on the pad structure, the intensity of the light refracted to the half space above the pad structure on the anisotropic pad structure is at an angular distance from the dome (Zenit, England: zenith) ( A function of 5 (in degrees). The wider intensity curve 1 corresponds to the light distribution perpendicular to the dominant direction of the relief structure of the anisotropic pad structure. The narrower intensity curve 2 corresponds to the direction The light distribution in the dominant direction of the relief structure of the opposite sex pad structure. The horizontal line indicates the saturation level of the photodiode of a color photocopier. As shown in Figure 1, at an angle, the color photocopier will The anisotropic pad structure is imaged with the same brightness, and the brightness difference seen by the eye with the naked eye in this angle range 4 is significantly different because the saturation effect does not occur in the eye under normal lighting conditions. This angle The size of the range 4 is related to the degree of anisotropy. The typical range of the angle range 4 is 15 ° ~ 35 °. 8 _________-The two paper dimensions apply the Chinese National Standard (CNS) A4 specification (210 X 297 mm)- ---. --------------------- Order -------- • Line (Please read the precautions on the back before filling this page) 578014 A7 ____ B7_—… 一 --- 5. Description of the invention () The pad structure, for example, has a bulge with an ellipsoidal shape (and thus a long shape), which is as long as the width. Both the length and the width are It is distributed statistically. But for the ridges, they have one thing in common. In other words, the long axis of the ellipsoid extends in almost the same direction. Structurally, the scattering capabilities of the two anisotropic mat structures. The intensity of light refracted on the anisotropic mat structure to the half space above the mat structure is also at an angular distance of 5 from the zenith. Function of an isotropic relief paper structure has no dominant direction in terms of azimuth. Therefore, the two intensity curves 5 and 6 are independent of the azimuth angle, that is, they are not affected by the orientation of the relief structure in the plane of the relief paper structure Influence. Therefore, the isotropic pad structure will vary the azimuth angle of the light incident vertically. Refraction in an isotropic manner. The different points in the two isotropic pad structures are based on different Riscstreu capabilities. As shown in Figure 1B, the two isotropic pad structures are The light intensity lies at the saturation level 3 of the photodiode of a color photocopier. The angle range of the color photocopier is 4. Therefore, the two isotropic pads are structured to form the same brightness in a photocopy. The viewer can clearly see the difference in brightness in this case without the aid of the naked eye of a tool. Figure 2 shows the appearance of a flat pattern 7, the area of which is divided into different image areas, which define an image information 9 It can be seen from the difference between the human eye and the background 8. In this case, the image information 9 is composed of separate letters' and they constitute the word VALID. The letters that define the image information 9 are composed of a first pad paper structure, which will be perpendicular to the 9 paper sizes and apply the Chinese National Standard (CNS) A4 specification (210 X 297 mm) III — — — — — — — — — — · 1111111 · 1111111 (Please read the notes on the back before filling out this page) 578014 A7 ^ __ B7_ 5. Description of the invention () The incident light is refracted in an anisotropic manner. The first pad structure therefore refracts light primarily (but not exclusively) into a first direction. The background 8 is composed of a second pad structure, and its orientation is different from that of the first pad structure. Therefore, it refracts light that is normally incident to a direction different from the first direction. As shown in the cross section of the third figure, the planar pattern should preferably be designed as a layer composite. The composite layer is composed of a first paint layer 10, a reflective layer 11, and a second paint layer for the cover layer 12. The entire pad structure in the image area of the flat pattern is made of a microscopic relief structure 13 as a whole. The reflective layer 11 changes the relief structure 13 into a structure that reflects light. The paint layer 10 is preferably an adhesive layer, so the composite of this layer can be directly bonded to a substrate. The cover layer 12 should completely cover the relief structure 13. In addition, its refractive index in the visible light frequency domain should be at least 1.5, so that the geometric profile height h produces the largest profile height with optical effects as much as possible. In addition, the cover layer 12 serves as a scratch-resistant protective layer. For example, the planar pattern can be manufactured in the following manner: the planar pattern is divided into a plurality of A = n * m pixels 14 (FIG. 2) in a matrix shape, and then a stamping stamp [its stamping area corresponds to one Pixel area] The pixels 14 are stamped one after the other into a sheet of thermoplastic foil. In order to make the drawing simple and clear, only some of the pixels 14 are displayed. When imprinting the pixels 14 related to the background 8, the imprint stamp occupies a first rotation position, and when imprinting the pixels 14 related to the image information 9, it occupies a second rotation position. For example, the two rotation positions are separated by an angle in the range of 10 ° to 90 °, for example, 20 °. Therefore, the dominant directions of the two anisotropic pad structures are separated by 20 °. All pixels 14 10 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) --------------------- Order --- ------ Line (please read the notes on the back before filling this page) 578014 A7 ___B7 _ 5. Description of the invention () After printing, the thermoplastic plastic foil is made into a conventional way 镌Printed matrix. Further details on the method of manufacturing such a flat pattern 'can be found, for example, in the European patents EP 0 105 099 Bl, EP 0 375 833 B1 and EP 0 201 323 B. Figure 4 shows schematically when a photocopy is used Machine, such as a color photocopier 15 for photocopying. The color photocopier 15 has a glass plate 16 and a carriage 18, and a document 17 to be photocopied, such as a banknote, is placed on the glass plate 16. The carriage 18 can move in an X direction, and the slide The stand 18 includes a light source 19, a deflection mirror 20, and a detector 21 having a light sensor 22. At the time of photocopying, the light 23 emitted from the light source 19 is incident obliquely on the document 17 at a certain angle, so it is also incident obliquely on the flat pattern 7 of the paper 17 having pad structures with various orientations. A portion of the incident light is refracted vertically downward, and is imaged onto the light sensor 22 of the color photocopier 15 via the deflection mirror 20. The refraction efficiency of the two pad structures is much greater than the area portion surrounding the flat pattern 7. In the area portion surrounding the flat pattern 7, light is not refracted, but only scattered. Even if only a small part of the light refracted on the pad structure is incident on the light sensor 22 of the color copier 15, such a small portion is enough to saturate the light sensor 22. Therefore, the area portion corresponding to the planar pattern 7 is uniformly bright on the photocopy. Therefore, the image information is lost during photocopying. The paper pad structure evenly refracts light into the half-space 24 above the flat pattern 7 (in the form of a refraction grid), so they have a large 11 This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) --------------------- tl .--------- line (Please read the precautions on the back before filling (This page) 578014 A7 _______B7_______ 5. Description of the invention () Advantages: To complete the present invention, the effect required is not affected by maintaining a certain lighting condition or not. In other words, even if the illumination angle is changed due to a piece during photocopying, the light is sufficiently refracted into the detector 21. In an advantageous design, the planar pattern 7 is composed of image pixels 25 (as shown in Figures 5A and 5B, which are used to generate image information 9) and background pixels 26 (which generate background 8). The image pixel 25 and the background pixel 26 are each divided into four sub-pixels 27. The typical measurement size of one sub-pixel 27 is, so the four sub-pixels 27 of one pixel cannot be seen by the human eye separately. The three sub-pixels 27 of each image pixel 25 include a first pad structure with a first dominant direction. The fourth sub-pixel 27 of the image pixel 25 includes a second pad structure, which has a second dominant direction. Different from this first advantage. The opposite is true for the background pixel 26. Here the three sub-pixels 27 include a second pad structure 'and the fourth sub-pixel 27 of the background pixel 26 contains a first pad structure. The first and second dominant directions are angled at an angle of 0 so that the viewer sees an image pixel 25 as a bright point and a background pixel 26 as a dark point, or vice versa. When the planar pattern 7 is rotated by 0 angle or 180 ° + Θ in its plane, the brightness 値 of the shadow pixels 25 and the background pixels 26 are confused. The direction of the pad structure in the sub-pixel 27 is indicated by an arrow. Therefore, the background paper structure that generates the background 8 and the pad paper structure that generates the image information 9 include a part of the same pad paper structure. In this embodiment, all the image areas, that is, background 8 and image information 9, refract light into two dominant directions, but at different ratios. However, due to the contrast produced by this, the human eye can still distinguish the image information 9 and 12. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm)--', --------- ----- install -------- order --------- line (please read the notes on the back before filling this page) 578014 Five A7 B7 Invention Description () Background 8. Since each pixel 25 and each background pixel 263 have at least one sub-pixel 27 having a first pad structure and at least one sub-pixel 27 having a second pad structure, all photo pixels 25 and background pixels are 26 refracts the light to the relevant light sensors 22 and saturates all the relevant light sensors 22, so the flat pattern 7 of the photocopy has a bright surface without contrast on the photocopy. In another embodiment, only the first pad structure is a pad structure refracted anisotropically, and the second pad structure is a pad structure refracted into the half-space 24 in an isotropic manner. structure. In this case, the human eye also sees the image information 9 and the background 8 of the flat pattern 7 due to different contrasts, and the color photocopier 15 cannot see this contrast difference because of its light sensor saturation. In yet another embodiment, the first paper pad structure and the second paper pad structure are both isotropic paper pad structures, but have different backscattering capabilities. The present invention can also be used to change the meaning and content of information on photocopies from the original. The example of Fig. 6 shows a part of the file 28 having the flat pattern 7. The text "Dies ist eine Kopie" was printed on Document 28. The plane pattern 7 is located in front of "Ye" (German character eine) in the character string, and the image information 9 of the plane pattern 9 indicates "no" (letter k). So when viewing the document, the viewer sees the sentence "This is not a photocopy" (Dies ist ireine Kopie). But the sentence "Dies ist eine Kopie" appears on the photocopy. 13 This paper size applies to China National Standard (CNS) A4 specification (210 x 297 mm) -------- I ---- · II (Please read the precautions on the back before filling this page) Order: .line·