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        1. 當前位置:首頁-常見問題解答>>激光防偽標簽技術存在哪些優缺點

          激光防偽標簽技術存在哪些優缺點

          來源:http://www.apersianrug.com/ 日期:2019-04-17 發布人:admin   激光防偽技術包括激光全息圖像防偽標識、加密激光全息圖象防偽標識和激光光刻防偽技術三方面。全息防偽技術包括常規全息防偽技術,多通道全息防偽技術,隱形加密技術,360°計算機點陣全息技術,雙層全息技術,熒光加密全息技術,動態編碼防偽技術,電話電碼防偽技術,核微孔防偽技術以及基因防偽技術,并具有圖像清晰、色彩絢麗、立體感強、一次性使用的特點。
            Laser anti-counterfeiting technology includes laser holographic image anti-counterfeiting identification, encrypted laser holographic image anti-counterfeiting identification and laser lithography anti-counterfeiting technology. Holographic anti-counterfeiting technology includes conventional holographic anti-counterfeiting technology, multi-channel holographic anti-counterfeiting technology, invisible encryption technology, 360 degree computer lattice holographic technology, double-layer holographic technology, fluorescent encrypted holographic technology, dynamic encoding anti-counterfeiting technology, telephone code anti-counterfeiting technology, nuclear and microporous anti-counterfeiting technology and gene anti-counterfeiting technology, and has the characteristics of clear image, brilliant color, strong stereoscopic sense and one-
            激光模壓全息防偽技術傳入我國是在80年代末90年代初,特別是1990年至1994年期間,全國各地引進生產線上百條,占當時世界生產廠家的一半多。在引進初期,這種防偽技術確實起到了一定的防偽作用,但是隨著時間的推移,激光全息圖象制作技術迅速擴散,如今早已被造假者從各個方面攻破,幾乎失去了防偽的能力。
            Laser moulding holographic anti-counterfeiting technology was introduced into China in the late 1980s and early 1990s. Especially from 1990 to 1994, hundreds of production lines were introduced throughout the country, accounting for more than half of the world's manufacturers at that time. In the initial stage of introduction, this anti-counterfeiting technology did play a certain role in anti-counterfeiting, but with the passage of time, laser hologram production technology spread rapidly, and now has been cracked by counterfeiters from all aspects, almost lost the ability of anti-counterfeiting.
            技術評論:
            Technical Review:
            激光防偽標識的在其產生時就具有如下先天的缺陷:
            Laser anti-counterfeiting label has the following congenital defects when it comes into being:
            a.僅僅依靠制作技術的保密和控制來防偽。
            A. Anti-counterfeiting only depends on the confidentiality and control of production technology.
            b.屬于簡單觀察類防偽技術,其觀察點主要是看是否是全息圖象,其次是看圖案是否符合公布的圖案,但普通消費者只有在仔細對比時才可以分辨出兩種不同版本的全息標識。
            B. It belongs to the simple observation anti-counterfeiting technology. Its observation point mainly depends on whether it is a holographic image or not. Secondly, it depends on whether the pattern conforms to the published pattern. But ordinary consumers can distinguish two different versions of the holographic logo only by careful comparison.
            c.沒有防止防偽標識本身被再次利用的技術方法。
            C. There is no technical method to prevent the anti-counterfeiting label itself from being reused.
            d.沒有防止附有防偽標識的包裝被再次利用的技術方法。
            D. There is no technical method to prevent packaging with anti-counterfeiting labels from being reused.
            e.沒有防止造假者利用收買、行賄等手段獲得防偽標識的技術方法。
            E. There is no technical method to prevent counterfeiters from obtaining anti-counterfeiting marks by means of buying and bribing.
            2. 改進的激光全息圖象防偽標識
            2. Improved laser holographic image anti-counterfeiting identification
            由于一代激光全息防偽標識已經完全失去了防偽功能,人們不得不開始對其進行改進。改進的方法主要有三種:一種是采用計算機技術改進全息圖象,第二種是研制成了透明激光全息圖象防偽標識,第三種是反射激光全息圖象防偽標識。
            Because the first generation laser holographic anti-counterfeiting label has completely lost its anti-counterfeiting function, people have to start to improve it. There are three main methods to improve the quality of holographic image: the first is to improve the holographic image by computer technology, the second is to develop a transparent laser holographic image anti-counterfeiting label, and the third is the reflection laser holographic image anti-counterfeiting label.
            (1).應用計算機圖象處理技術的改進: 計算機圖象處理技術改進激光全息圖象經過了兩個階段的發展,一個階段是計算機合成全息技術,這種技術是將一系列普通二維圖像經光學成像后,按照全息圖象的原理進行一系列的處理,并記錄在一張全息記錄材料上形成計算機象素全息圖象,觀察這種象素全息圖象時,可在不同的視角看到不同的三維圖像,其圖形和彩色都具有異常靈活多變的動態效應,并且不受再現光線方向的限制。第二階段是計算機控制直接曝光技術,與普通全息成像不同,這種技術不需要拍攝對象,所需圖形完全由計算機生成,通過計算機控制兩相干光束以像素為單位逐點生成全部圖案,對不同點可改變雙光束之間的夾角,從而制成具有特殊效果的三維全息圖.
            (1) Improvement of computer image processing technology: Computer image processing technology improves laser holographic image through two stages of development. The first stage is computer synthetic holographic technology. This technology is to process a series of ordinary two-dimensional images after optical imaging, according to the principle of holographic image, and record them on a holographic recording material. Computer-generated pixel holographic images can be viewed from different perspectives. The graphics and colors of these images have very flexible dynamic effects and are not restricted by the direction of the reconstructed light. The second stage is computer-controlled direct exposure technology. Unlike conventional holographic imaging, this technology does not require the object to be photographed. The required graphics are generated entirely by computer. By computer-controlled two coherent beams to generate all patterns point by point in pixels, the angle between two beams can be changed for different points, thus making a three-dimensional hologram with special effect.
            (2).透明激光全息圖象防偽技術: 普通的激光全息圖象是用鍍鋁的聚酯膜經過模壓(也可以先用聚酯薄膜經過模壓再鍍鋁)而成,鍍鋁的作用是增加反射光的強度使再現圖像更加明亮,照明光和觀察方向都在觀察者這一側,這樣的激光彩虹模壓全息圖是不透明的。透明激光全息圖象的改進之處實際上就是取消了鍍鋁層,全息圖象直接模壓在透明的聚酯薄膜上。1996年,我國公安部又決定將透明激光彩虹模壓全息圖應用在居民身份證上,身份證被透明膜整個覆蓋和封住,當在光線下觀察其正面時,不但能看清證件,還能看到透明膜上再現出來的二維三維彩虹全息圖像(長城及中國的中英文字樣)
                                   激光防偽標簽技術
            (2) Transparent laser hologram image anti-counterfeiting technology: ordinary laser hologram image is formed by moulding aluminized polyester film (or by moulding aluminized polyester film first). The effect of aluminizing is to increase the intensity of reflected light to make the reconstructed image brighter. The illumination and observation direction are on the observer's side. Such laser rainbow moulding hologram is opaque. In fact, the improvement of transparent laser hologram is the elimination of aluminium coating, and the hologram is directly moulded on transparent polyester film. In 1996, the Ministry of Public Security of China decided to apply transparent laser rainbow moulding hologram to the resident identity card. The identity card was covered and sealed by transparent film. When the front of the card was observed under light, not only the document could be seen clearly, but also the two-dimensional rainbow hologram (the Great Wall and the Chinese and English characters of China) could be seen on the transparent film.
            (3).反射激光全息圖象防偽技術: 反射全息圖是將入射激光射到透明的全息乳膠介質上,一部分光作為參考光,另一部分透過介質照亮物體,再由物體散射回到介質作為物光,物光和參考光相互干涉,在介質內部生成多層干涉條紋面,介質底片經處理后在介質內部生成多層半透明反射面(例如6微米厚的乳膠層里可以有20多個反射面 )。
            (3) Reflected laser hologram anti-counterfeiting technology: Reflected hologram is a kind of transparent holographic latex medium in which the incident laser is irradiated. One part of the light is used as reference light, the other part illuminates the object through the medium, and then scatters the object back to the medium as object light. The object light and reference light interfere with each other to form a multi-layer interference fringe surface in the medium. The medium plate is processed and placed inside the medium. Generate multilayer translucent reflectors (for example, more than 20 reflectors in a 6 micron thick latex layer).
            技術評論:
            Technical Review:
            激光防偽技術的這些改進并沒有也不太可能延長激光全息圖象防偽技術的生命周期,因為這些改進只是不同程度地增加了圖象的制造難度,沒有能改進掉哪怕是一條激光全息圖象防偽的先天不足,原有的問題依然存在。
            These improvements of laser anti-counterfeiting technology do not and are unlikely to prolong the life cycle of laser holographic image anti-counterfeiting technology, because these improvements only increase the difficulty of image manufacturing to varying degrees, and fail to improve even the inherent shortcomings of a laser holographic image anti-counterfeiting, the original problems still exist.
            總技術評論: 激光全息防偽技術是近年來在國內外受到普遍關注的一項現代化激光應用技術成果,它以深奧的全息成像原理及色彩斑斕的閃光效果而受到消費者的青睞與喜愛。激光全息防偽標識可廣泛應用于輕工、醫藥、食品、化妝品、電子行業的名優商標、有價證券、機要證卡及豪華工藝品等與一般印刷商標相比,它具獨特的優勢與魅力。本技術適合與其它防偽結合使用,如激光全息綜合防偽、激光電碼復合式、激光油墨復合式、包裝激光復合式等
            General technical review: Laser holographic anti-counterfeiting technology is a modern laser application technology achievement which has received widespread attention at home and abroad in recent years. It is favored and loved by consumers for its profound holographic imaging principle and colorful flashing effect. Laser holographic anti-counterfeiting label can be widely used in light industry, medicine, food, cosmetics, electronics industry, famous trademarks, securities, machine key card and luxury handicraft, etc. Compared with general printed trademarks, it has unique advantages and charm. This technology is suitable for combination with other anti-counterfeiting technologies, such as laser holographic anti-counterfeiting, laser code composite, laser ink composite, packaging laser composite, etc.

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