Matches 101 - 150 out of 255 < 1 2 3 4 5 6 >
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6500526 Retroreflective sheeting containing a validation image and methods of making the same  
This invention relates to retroreflective sheeting that has an image, such as a validation image. In one embodiment, the image is directional having varying appearance at different angles of view. ...
6496287 Optical identification element  
An optical component in the form of an identification element (such as for counterfeit protection or copy protection) includes an optically anisotropic layer comprising regions of different optical...
6495295 Hologram transfer film  
Disclosed is a hologram transfer film which can realize easy and good transfer of a hologram and, at the same time, can realize stable transfer of the hologram in a transfer process. The hologram...
6494491 Object with an optical effect  
An item with a surface area creating an optical effect is such that the surface area with the optical effect exhibits at least two images ( 12, 14 ) separated a distance (d) from each other by...
6489065 Holographic medium and process for use thereof  
A holographic recording medium comprises (a) an acid generator capable of generating an acid upon exposure to actinic radiation; and (b) a polymer comprising a plurality of high refractive index...
6444377 Security features  
The invention relates to improvements in security features in paper and other substrates and in particular to an activatable feature to warn of tampering. The invention further relates to a...
6436584 Image-recording medium, method for forming image-recording medium, method and apparatus for reading data  
There is described an image-recording medium and an image-reading method, which make it possible to improve reading accuracy of information by avoiding duplication of an optical variable image with...
6418232 Method of authenticating digital-watermark pictures  
An extraction process includes the steps of carrying out a geometric transformation on a picture being inspected to transform the size of the picture being inspected into a reduced scale of an...
6414761 Secure holographic images on paper  
A paper support has an adhesive layer and a metallized holographic image, wherein the metallized holographic image includes at least two holograms, such that the first hologram is visible only by...
6392768 Dot matrix hologram with a hidden image  
A dot matrix hologram with a hidden image is disclosed, wherein the hidden image technology is applied to a dot matrix hologram. Although the hidden image technology has been used in a conventional...
6369947 Surface pattern  
A surface pattern comprises microscopically fine relief structures that diffract visible light. When the surface pattern is illuminated perpendicularly with white light, the surface pattern appears...
6369919 Holographic security device  
A holographic security device comprising first and second holographic generating structures ( 2,3 ) recorded in respective sets of substantially non-overlapping regions of a record medium is...
6342969 Multiple image diffractive device  
A pixellated diffractive device includes a multiplicity of pixels ( 12,22 ) in turn divided into multiple sub-pixels ( 13,23 ). The device is related to one or more pixellated diffraction surface...
6337752 Data carrier having an optically variable element and methods for producing it  
The invention relates to a system comprising a series of data carriers, in particular identity cards, papers of value or the like, whereby the data carriers belonging to the system exhibit...
6323972 Real-time analog creation of holographic fourier transform matched filters  
A method is disclosed by which filters are created optically in real time--and tested. This technique is made possible by recent advances in Charge Couple Detector (CCD) detector array technology....
6317226 Dot matrix hologram for hiding a moire pattern  
A moire pattern technology about a dot matrix hologram for hiding a moire pattern is invented. In the moire pattern hidden region of a dot matrix hologram, the moire pattern foreground area and the...
6310700 Velocity matching electrode structure for electro-optic modulators  
This is an electro-optic modulator having an electro-optic substrate such as lithium niobate, an optical waveguide defined within the substrate, an electrode structure including a microwave...
6301047 System for optically identifying an object  
The object to be identified is affixed with an identification medium comprising a reflective layer consisting of a reflective hologram or diffraction grating. The high polymer cholesteric liquid...
6280891 Multi-layer assembly and method for marking articles and resulting marked articles  
Methods and adhesive labels useful in marking products or documents by applying these to substrates. A mark such as a barcode, photograph or characters are formed directly on the substrate and the...
6271967 Optically diffractive structure  
The invention concerns a structure arrangement that includes surface regions having one or more structures having an optical-diffraction effect, in particular for visually identifiable, optical...
6252685 Optical recording medium and apparatus of judging fake thereof  
A phase watermark hologram "W" is composed of a blaze having binary phase difference of 2π×n, where "n" is a natural number of more than 1. An watermark appears in response to phase difference,...
6243202 Structure arrangement, in particular for a security element  
A structural arrangement having optical diffraction qualities for use as a security element in a value bearing document, such structural arrangement having a plurality of surface regions having at...
6226109 Diffractive security device on compact discs  
This invention relates to marking the genuine CD in an easily detectable way while difficult to counterfeit. The improved CD has within its layers a second structured surface parallel to the flat...
6222650 Holographic authentication element and document having holographic authentication element formed thereon  
Device, method, and system for recording diffractive high resolution text, pictorial, and/or other graphical information is provided which is particularly suited to recording information that would...
6171734 Security printed document to prevent unauthorized copying  
A paper substrate is laminated with a metalized layer forming a mirrored surface. A partially transparent black diffraction grating is applied by stochastic screening to the mirrored surface. The...
6124953 Wallpaper construction having a holographic border  
A decorative construction 10 for attachment to a vertical surface wherein the decorative construction 10 includes a main image unit 11 comprising a generally elongated rectangular sheet of...
6111671 Match filters for a real time fingerprint sensor and verification system  
A real time fingerprint verification system includes a recording device and a verification device each having a fingerprint scanner for generating a flat, dimensionally undistorted, high contrast,...
6088161 Diffractive device having a surface relief structure which generates two or more diffraction images and includes a series of tracks  
A diffractive device has a surface relief structure which when illuminated by a light source, generates one or more diffraction effects which are observable from a range of viewing angles around...
6070724 Package with holographic image generating decal  
In order to depict features such as pivoting and/or the flexure of elements of an article or articles which are enclosed within a package, at least one holographic generating layer is disposed on...
6066437 Film which can be lettered using a laser beam  
This invention relates to film which is lettered with a laser beam comprising at least one protective film which is transparent to the laser beam, at least one opaque layer which is ablated by the...
6066378 Volume hologram laminate and label for preparing volume hologram laminate  
A multilayered volume hologram structure of the invention comprises a substrate 2 for a certificate or the like, and an adhesive layer 5, a volume hologram layer 5 and a surface protective film 7...
6036807 Method for applying a security code to an article  
For applying a security code to an article, such as a cheque guarantee card, credit card, identity card or component of a motor or machine, use is made of a hologram or kinegram wherein...
6017657 Method for embossing holograms into aluminum and other hard substrates  
Surface relief holograms are prepared by directly impressing them into aluminum and other hard metal substrates, without the need to preheat or otherwise soften the substrate. A holographic...
6005691 High-security machine-readable holographic card  
The hologram card generates a hologram image in response to an illumination light beam. The hologram card comprises a substrate of a first plastic material having a first refractive index. The...
6002499 Real time fingerprint sensor and verification system  
A real time fingerprint verification system includes a recording device and a verification device each having a fingerprint scanner for generating a flat, dimensionally undistorted, high contrast,...
5999280 Holographic anti-imitation method and device for preventing unauthorized reproduction  
A holographic anti-imitation method and device is provided, which can prevent a creative graphic design from unauthorized reproduction. The holographic anti-imitation method and device provides the...
5969863 Surface pattern including light-diffracting relief structures  
A surface pattern has two surface portions with microscopically fine, light-diffracting relief structures. The relief structures are in the form of grating structures GS1 and GS2, respectively,...
5956164 Two-dimensional/three dimensional graphic material and method of making same  
Graphic material includes at least one area bearing a hologram and at least one area bearing a diffraction grating. Preferably, the diffraction grating and the hologram are simultaneously viewable...
5943144 Process for the manufacture of non-replicable holograms possessing authenticity features and a reading device to check authenticity  
A process for the manufacture of non-replicable holograms possessing authenticity features which are copies of a master hologram. To form a master hologram, a hologram is taken of a randomly...
5912767 Diffractive indicia for a surface  
Diffractive indicia for a surface (1) comprising a plurality of small separate diffractive elements (2) and means for a adhering the diffractive elements to the surface. Each diffractive element...
5909313 Multiple image diffractive device  
A pixellated diffractive device includes a multiplicity of pixels in turn divided into multiple sub-pixels. The device is related to one or more pixellated diffraction surface structures which when...
5900954 Machine readable record carrier with hologram  
A record carrier (e.g., an identification card) of the type containing machine-readable representations of data, wherein the record carrier comprises a substrate, a first pattern of...
5896359 Spinning disc volume holographic memory  
A volume holographic memory has a spinning disk comprised of photorefractive medium, object beam optics configured to direct an object beam through the outer edge of the disk, and reference beam...
5896208 Master hologram for the production of copy-proof holograms  
A method for the production of holograms proof against copying and imitation possessing authenticity features, which are copies of a master hologram. In accordance with the invention as a master...
5886798 Information carriers with diffraction structures  
An information carrier has at least one diffraction pattern which is formed from microscopically fine relief structures and which, upon being illuminated with coherent light, produces in two...
5857709 Anticounterfeit documentation with see-through and write-able hologram  
A security document form such as a bank draft, or other document of value may incorporate a see-through and write-able hologram or diffractive grating as an anticounterfeit measure. The hologram...
5843626 Method for manufacturing a master disc for optical discs  
In a method for manufacturing a master disc for optical discs, patterns to be displayed on the disc are classified into a main object and a background. The background is commonly assigned as the...
5841555 Secure optical identification method and means  
A method of providing secure identification for an article, including: providing on the article a diffraction grating strip including a pattern of a series of diffraction grating elements, each the...
5838466 Hidden Holograms and uses thereof  
Replicas of a surface relief hologram, or other light diffraction pattern, are coated with a transparent material having substantially the same refractive index as the holograms to conform to the...
5835245 Holographic method and materials to detect and prevent forgery in identity cards  
Security and identity cards including at least one hologram of the card, or part of the card, are disclosed. Holographic methods and materials to detect and prevent forgery in identity cards such...
Matches 101 - 150 out of 255 < 1 2 3 4 5 6 >