{"id":13,"date":"2019-01-20T11:53:56","date_gmt":"2019-01-20T11:53:56","guid":{"rendered":"https:\/\/dns-iran.com\/?page_id=13"},"modified":"2020-01-19T14:20:00","modified_gmt":"2020-01-19T10:50:00","slug":"hologram","status":"publish","type":"page","link":"https:\/\/dns-iran.com\/index.php\/hologram\/","title":{"rendered":"Hologram & Accessories"},"content":{"rendered":"\n

DNS-IRAN Definition ; What does Hologram mean? A hologram is an image created by a photographic projection of a recording of a light field rather than an image formed by some sort of lens. It appears as a three-dimensional representation on a two-dimensional object, which can be seen without intermediate optics such as goggles or glasses. However these hologram images become unintelligible when viewed under diffused ambient light since they are not actual images. The photographic technique used to create these images is called holography.<\/p>\n\n\n\n

What is a hologram or OVD and why should I use this technology?<\/h3>\n\n\n\n

The term ‘OVD’ (Optically Variable Device) is used to describe \nboth laser generated hologram images and electron beam generated images.\n <\/p>\n\n\n\n

These optically variable devices are created in highly-secure \nfacilities and are at the forefront of overt asset and brand protection \nprogrammes. <\/p>\n\n\n\n

The OVD can be used as a stand-alone feature or can be combined \nwith printed security features to create devices that are extremely \ndifficult to replicate using conventional photocopy or scanning \ntechnologies.<\/p>\n\n\n\n

OVD technologies <\/p>\n\n\n\n

The list of technologies below is by no means exhaustive. It is \nsimply meant to act as a guide to the most frequently used OVD \ntechnologies.<\/p>\n\n\n\n

2D\/3D – a laser generated holographic \nimage that has depth and parallax. It uses two dimensional artwork to \nbuild a three dimensional picture.<\/p>\n\n\n\n

3D – is a laser generated image that depicts an object in 3D. It can be computer generated or created using a micro-model.<\/p>\n\n\n\n

Dot Matrix – generally flat, rather \nthan three dimensional, but highly kinetic holographic image. It can be \nhigh resolution and is ideal for containing optical forensic features \nsuch as microtext.<\/p>\n\n\n\n

Filmed Stereogram – a 3D moving image created from a filmed subject. Ideal for high security work and can also be computer generated.<\/p>\n\n\n\n

Combination Images – As the name \nsuggests, a combination of some of the above single technologies in \norder to create an image with increased security.<\/p>\n\n\n\n

Ebeam Image – this is an image created\n without the use of a laser. The underlying structure of the image is \nwritten at the microscopic level with an electron beam generator. This \ntype of image can include three dimensional and highly kinetic elements \nwith forensic features within one image. It is highly secure, but \ncommands a high price.<\/p>\n\n\n\n

Designing a hologram<\/p>\n\n\n\n

From your supplied artwork (line art, colour separated or a \ncomputer file) a hologram can be chosen to suit your application. This \ntakes into account the substrate onto which the hologram will be applied\n and the existing graphics with which the hologram will interact.<\/p>\n\n\n\n

The design proof is usually supplied as both hard copy colour \nprint (where the security features contained within the hologram will be\n detailed and shown in magnification) and as a fully animated video file\n that can be played on a desktop PC. <\/p>\n\n\n\n

Providing your supplier offers these stages it will allow them to\n engineer any changes whilst the OVD is still in its design stage. The \nOVD is not ‘originated’ until the hard copy colour print and video file \nhave been agreed by you. Once you have approved the inital designs, the \nOVD is then originated (created) and manufacturing can commence.<\/p>\n\n\n\n

Registered Images, continuous images and stripes <\/p>\n\n\n\n

When the OVD is designed it will be either a registered image or \ncontinuous image. You will make your choice, governed by cost, \napplication speed, security of the image and aesthetic appearance.<\/p>\n\n\n\n

A registered (specific) image can be described as a single \ndiscreet picture (image a portrait of yourself). Even though the \nrequirement may be for millions of images, all the images will be \n‘separate’ items but each is exactly the same as the next. During \napplication, the registered image is applied in exactly the same \nposition on each document that passes through the application press. \nThis is the type of OVD seen on credit cards and passports.<\/p>\n\n\n\n

A continuoius image is often called a wallpaper pattern. This is \nbecause the image is designed so that wherever an impression is taken, \nall of the elements will be included, although not necessarily in the \nsame position as the preceeding impression. in general, continuous \nimages are designed for cost-effectiveness rather than overall aesthetic\n or security concerns.<\/p>\n\n\n\n

A recent development has been the introduction of the OVD stripe.\n Generally the stripe is an OVD continuous pattern applied at a width of\n 10mm or less. The benefit of strips is that application speeds are very\n high and thus the unit cost is lower. This makes OVD stripe application\n ideal for large runs. An OVD stripe can be seen on the \u00a320 note and the\n Euro banknotes.<\/p>\n\n\n\n

Metallised, demettalised and selectively demetallised<\/p>\n\n\n\n

The embossed hologram is metallised using a vacuum deposition \nprocess. This gives the hologram its silver appearance. Lacquer coatings\n can be used in the production process to alter the colour of the \nhologram, giving gold, red, blue etc.<\/p>\n\n\n\n

It is also possible to use high refractive index coatings in the \nmetallisation process instead of aluminium. This allows the OVD to be \ntransparent at some angles of view yet fully diffractive at other \nangles. This type of product is ideal for ID applications where the \ntransparent hologram is used as a security device to protect a \nphotograph or important data.<\/p>\n\n\n\n

A further process that can significantly increase the security of\n the OVD is selective demettalisation. In this process metal is removed \nfrom the OVD image after metallisation. Fine detail patterns can be \nachieved, including micro text. This process, when allied to a high \nsecurity image creates a product that would be almost impossible to copy\n accurately.<\/p>\n\n\n\n

Carrier Medium<\/p>\n\n\n\n

The OVD’s that are in general use today are created as embossed, \nmetallised images. This is the type of OVD as seen on a bank card, \ncheque or bank note.<\/p>\n\n\n\n

The OVD can be supplied as a pressure sensitive (self adhesive) \nlabel or as a transfer foil suitable for hot or cold stamping by rotary \nor platten application. The OVD images can also be supplied as a \nlamination film suitable for packaging applications.<\/p>\n\n\n\n

In most cases, the OVD’s that can be seen on bank cards, \nbanknotes, tickets, printed documents and cheques have been produced \nas hot stamping foils which are applied with high-speed precision \nequipment.<\/p>\n\n\n\n

Hot stamping foils<\/p>\n\n\n\n

Most security printers use a large volume of security hot \nstamping foils. They are produced to high specifications and are applied\n using specialist equipment onto products that are produced in their \nfactories. They can apply registered image, continuous image and stripe \nas some have platen and rotary application methods. In general, hot \nstamping foils are used in conjuction with paper or polymer (plastic) \nsubstrates. A pre-printed material is passed through an application \npress at high speed and the OVD is applied onto the surface of the \nmaterial. This process is used to apply OVD’s onto cheques, labels, \ntickets and financial documents. The application process is usually \naccurate to +\/- 0.25mm ensuring consistency throughout the production \nrun.<\/p>\n\n\n\n

Hologram Labels<\/p>\n\n\n\n

OVDs can also be supplied as labels that are tamper evident. \nThese can be applied by hand, by hand-held applicator or by high speed \nlabelling machines. The basic types of tamper evident labels that you \ncan purchase exhibit their tamper evidence either by delaminating, \nvoiding or by fracture\/crumbling if an attempt is made to remove them. <\/p>\n\n\n\n

Suppliers can also manufacture labels that combine security \nfeatures with OVDs in order to enhance their products’ performance and \nto allow the end user to perform a simple test of the label. The \ncombination of print and OVD can offer a much more aesthetically \npleasing product than an OVD only label. The labels can also be \nindelibly numbered and the larger labels can have variable data and \nbarcodes printed.<\/p>\n\n\n\n

Applications<\/p>\n\n\n\n

Cheques, Event Tickets, Gift Vouchers, Lottery Tickets, Swing \nTags, Labels for tamper-evident use, Labels for Brand and Asset \nProtection, Taxation Documents, Parking Permits, Identity Documents, \nAccess Control Passes. <\/p>\n\n\n\n

DNS-IRAN Explanation;<\/h4>\n\n\n\n

Hologram refers to both the physical \nmedium that diffracts the light to create the image and the resulting \nimage itself. The first practical optical hologram that recorded a 3-D \nobject was invented in 1962 by Yuri Denisyuk of the then Soviet Union \nand by Dennis Leith and Juris Upatnieks at the University of Michigan. \nSince its development in 1962, various hologram types have been \ndeveloped.\n<\/p>\n\n\n\n

One type is called a transmission hologram. These holograms are \nproduced by splitting the laser light into an illumination beam and a \nreference beam. The illumination beam is projected directly on the \nobject while the reference beam is projected directly onto the \nphotographic medium, forming an interference pattern on the film; the \nresult is a captured light field that was taken in a method similar to \ntraditional photography processes.\n<\/p>\n\n\n\n

Another type of hologram is the rainbow hologram, which is \ncommonly used for authentication and security purposes. These are \ndesigned to be viewable under the illumination of white light rather \nthan laser light like other types of holograms. The image is created \nusing a vertical slit which removes vertical parallax in the resulting \nimage, reduces spectral blur and preserves the three-dimensionality for \nmost observers. These can usually be found on credit cards, product \npackaging and driver\u2019s licenses. <\/p>\n\n\n\n

Another common type is the Denisyuk hologram or reflection hologram. This type is seen in holographic displays and is capable of multicolor image reproduction.<\/p>\n\n\n\n

Dns-Iran hologram administration provide completely line and running the project for all type of Hologram included security hologram , packaging , and brand protection .<\/strong><\/p>\n\n\n\n

so we can categorizing security hologram production step as bellow while all steps can be provided by DNS-IRAN company.<\/p>\n\n\n\n