The hottest dynamic two-dimensional laser marking

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Dynamic two-dimensional laser marking technology (Part I)

Abstract: the new marking has anti-counterfeiting function, extreme miniaturization and greater anti-damage characteristics

one-dimensional and two-dimensional bar codes have become a universal tool for marking information on countless products and objects. These marks can be printed on the label or directly on the product. However, the application of traditional barcode is limited in some occasions, such as preventing product counterfeiting, preventing illegal extraction of information, code miniaturization, and effective preservation of data content (even if the mark is physically damaged, the data content will not be affected according to the combustion performance of building materials)

in the traditional linear bar code, the data is encoded in the pattern of alternating bright and dark lines, and the width of the center line of the pattern and the spacing of the lines are different. In two-dimensional bar code, data is encoded in an array of bright and dark pixels. The new 2dmi code is completely different. The computer algorithm converts binary information or character information into a rectangular (or square) pattern composed of crossed lines (see Figure 1). The position, angle and thickness of these lines are all combined to form coding information. Several coding schemes with different complexity have been developed, and the number of lines is different, which can support 15 digit information

Figure 1 2dmi coding example shows how the position, angle and thickness of lines are combined to load coding information

one of the advantages of this method is that damage will not cause the loss of stored data. If a part of the traditional barcode is obliterated, the data stored in that section will be permanently lost. However, when recording data with 2dmi, as long as a part of each line can be imaged with a reader, then the system software will easily reconstruct the whole image, so all the original data can be decoded. In fact, if the whole corner or most of the edges of 2dmi mark are deleted, no data will be lost (see Figure 2). This is particularly useful for products with high frequency of use and/or high wear

Figure 2 Even if the mark is seriously damaged, the data can be read out

Another important advantage of

2dmi is that it can be used for patent coding. The coding of traditional bar codes is standardized. Anyone can read and copy them, and print them on their counterfeit products. With 2dmi, this cannot be done. Use complex and unique cryptographic algorithms to generate tags and decode them. Moreover, these algorithms can support almost countless coding combinations. Every licensed 2dmi user will get their own unique password algorithm to provide them with a secure closed system. Without the rigidity of the user's password algorithm, no one can read and copy his password, even those users who have their own 2dmi system provided by orbid. This will protect the interests of users, prevent their products from counterfeiting, and prevent those immoral dealers from illegal activities, such as illegal discounts or transshipments

finally, for ordinary coding, there is a minimum size limit. Pixels and lines are closely combined. When the size is small enough, information cannot be stored and read out. On the contrary, 2dmi is a relatively open marker, and lines are relatively separated from each other, so it does not need the resolution or contrast of traditional markers. This allows 2dmi to take a much smaller form. In order to obtain the maximum spatial resolution, the small and expensive items (such as watches, jewelry or gemstones) can be marked with a Q-switched UV laser. The size of the mark can be a few tenths of a millimeter, which will not affect the appearance at all

how can 2dmi marking become a reality? In some cases, the customer can sign an "application agreement" with orbid, which specifies the delivery conditions that orbid needs to obtain before the customer obtains the license of the technology. Part of the agreement may include the delivery of product samples and the application of design specifications. When anti-counterfeiting protection is particularly important, it may be necessary to generate a series of true and false marks to ensure that the orbid system can clearly distinguish them. The purchaser of the system needs to pay the license fee and pre use fee for horizontal competition through the company's acquisition, that is, to pay the cost of several products being marked. Small goods customers generally have laser marking system parts, and the system itself may be purchased by end customers. Customers with larger items can work closely with orbid to purchase a third-party laser marking workbench. Ordinary hand-held image scanners are used for marking, and the information is decoded by computers equipped with appropriate algorithms

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