Matches 201 - 250 out of 255 < 1 2 3 4 5 6 >
Match Document Document Title
5351142 Semi-transparent reflective layer for a phase hologram  
A phase hologram is embossed in a mylar web having a tin tungsten oxide reflective layer deposited upon. The embossed microtexture produces a hologram that is semi-transparent, thereby allowing the...
5347111 Authenticity identifying structure for an article  
For the purpose of identifying the authenticity of an article, an incident detecting light beam having a certain wave length and a polarization plane extending in a certain direction is projected...
5331443 Laser engraved verification hologram and associated methods  
A method for increasing the authentication effect of a verification hologram to be affixed to a protected document includes laser etching individualized indicia into the reflective layer of each...
5319476 Multiply recorded hologram for security  
A hologram containing information recorded such a manner that it is difficult to read. A Lippmann hologram (10) contains photoelectrically readable information (13) recorded so as to be...
5319475 Tamper resisting holographic security seal  
A tamper resistant security seal is a laminated tape having a transparent carrier layer (2); an optical, diffraction pattern defining layer (3,4); and an adhesive layer (6) for adhering the tape to...
5314767 Holographic products with improved seals  
An improved process for cutting and simultaneously sealing the cut edges of holographic materials comprising cutting with a hot cutting tool. Suitable cutting tools include a steel rule die, a hot...
5310222 Optical device  
An optical security device for use on a security article comprises a number of layers including an optically diffracting layer and an at least partially reflective layer which together generate a...
5306899 Authentication system for an item having a holographic display using a holographic record  
In order to improve security for holographic labels which are positioned on a substrate base, a bar code symbol is holographically recorded on the base such as a credit card, a label, or a...
5300764 Transparent optical identification label with infrared directivity  
An optical identification label consisting of an area of hologram or diffraction grating which is transparent to visible light but reflects incident light with a specific reflective directivity. By...
5296949 Optical authentication device  
An optical device for receiving incident light having a minimum wavelength, and for producing a resultant light containing an optical image. The device includes a first material having a first...
5271644 Security device comprising optically variable data and method for making the same  
A security-printing device comprising: (i) a substrate; (ii) a toner image adhered to said substrate; and, (iii) a layer of an optically variable material adhered solely to said toner image,...
5267753 Holographic bank draft  
A bank draft form may incorporate a hologram as an anti-counterfeit measure. The hologram may extend over a substantial portion of the bank draft form, including the signature entry area and other...
5155604 Coated paper sheet embossed with a diffraction or holographic pattern  
A decorative substrate consisting of a paper base sheet coated with a thermoplastic material, involving a novel technique for coating and embossing the substrate. The paper sheeting is supplied...
5145212 Non-continuous holograms, methods of making them and articles incorporating them  
Non-continuous reflective holograms or diffraction gratings are provided in various forms for authenticating documents and things, and for decorative and product packaging applications. In one...
5142383 Holograms with discontinuous metallization including alpha-numeric shapes  
Non-continuous reflective hologram or diffraction grating devices are provided in various forms for authenticating documents and things, such as those that contain visual information desired to be...
5138468 Keyless holographic lock  
A keyless holographic locking device that uses a matched optical filter to store in form of a hologram a unique identificaton such as a fingerprint of an authorized user, a source of coherent light...
5128779 Non-continuous holograms, methods of making them and articles incorporating them  
Non-continuous reflective holograms or diffraction gratings are provided in various forms for authenticating documents and things, and for decorative and product packaging applications. In one...
5095194 Holographic credit card with automatical authentication and verification  
A holographic credit card that uses a matched optical filter to store in form of a hologram a unique identification such as a fingerprint of the authorized user, a source of coherent light that...
5085514 Technique of forming a separate information bearing printed pattern on replicas of a hologram or other surface relief diffraction pattern  
A method and system for replicating microstructure surface relief patterns, such as diffraction patterns including holograms, by casting. A liquid casting resin is held between a surface relief...
5059776 Bar code field and bar code reader  
An article of manufacture contains a substrate which contains a bar code field containing bar elements and background elements. The bar code elements have embossed, optically-reactive, microscopic...
5044707 Holograms with discontinuous metallization including alpha-numeric shapes  
Non-continuous reflective hologram or diffraction grating devices are provided in various forms for authenticating documents and things, such as those that contain visual information desired to be...
5026132 Method of producing and reproducing holograms  
In a method of taking and reproducing photographs in which a hologram in the substrate of the photograph is superposed on the photograph and is produced, e.g., by the Lippmann-Bragg process by an...
5024495 Computer software protection, by optical effects  
This apparatus and method protects software from unauthorized distribution and use, by utilizing the fact that holograms and other optical effects-producing media are extremely difficult to copy. A...
4913504 Documents or like articles bearing holograms  
A document or like article produced by a process which provides a three-dimensional, light-diffracting pattern comprising a hologram on a surface of a transparent material layer which may be...
4876725 Method and apparatus for fingerprint verification  
The invention relates to an optical processing fingerprint verification device. A light source illuminates a prism upon which the user has placed two fingers to that light reflected from the prism...
4832445 Security diffraction devices difficult to exactly duplicate  
Holograms, including diffraction gratings, and methods of making them, that reconstruct an image which changes as the hologram is tilted with respect to the viewer and in a manner that images...
4820006 Holographic identification system using incoherent light  
Apparatus and method for a holographic identification system used to determine the presence and identification of objects with tags and labels placed on persons, articles, goods, merchandise,...
4802758 Device for quality control of holograms  
The device consists essentially of a frame designed to support the hologram, at least one source of electromagnetic radiation, at least one sensor and a processing unit which, in at least one...
4662653 Optically diffracting security element  
A security element for authenticating bank notes, credit cards, security passes and the like is disclosed. The security element incorporates a reflective-type diffraction grating, which grating...
4568141 Document having an optical-diffraction authenticating element  
A document includes a substrate which has an outer surface and defines a plane, and a coordinate system which is defined with respect to the plane. A diffraction-optical authenticating element...
4563024 Hologram identification device  
An identification device in the form of a security card or anti-counterfeiting label which comprises a hologram visible by reflection in incident natural light, the film emulsion having been...
4304809 Identity card with grid images  
Disclosed is an identity card having grid images thereon comprised of a linear grid structure. In various embodiments, the grid depths of the individual grid images differ and can produce several...
4269473 Identification card with a hologram and a process for the production thereof  
An identification card, which has an increased safeguard against counterfeiting, comprises both a hologram containing information and information which is visible recorded in a single layer of...
4171864 Identification document and display unit therefor  
An identification document contains idential data both in visual and holographic form. Simultaneous display of the visual data and holographic data in closely adjacent relationship permits ready...
4171766 Falsification-proof identification card having a Lippmann-Bragg hologram  
An identification card with a holographic security safeguard in the form of a large area Lippmann-Bragg hologram recorded on a layer or sheet-like carrier disposed on a face of the identification...
4163290 Holographic verification system with indexed memory  
A verification system utilizing a holographic memory defined by a multiplicity of individual holograms on a photographic strip arranged side by side in elongate, parallel, hologram channels of...
4150781 Access authentication system  
This invention describes a system for access control, wherein a control card is presented to a control means. If the control card is authenticated, then access is gained. If it is not...
4131337 Comparison reader for holographic identification cards  
Disclosed are a method and apparatus for verifying an identification card or the like having visible indicia thereon and also having on a portion thereof a hologram of said visible indicia as...
4126373 Holographic identification elements and method and apparatus for manufacture thereof  
An identification element having an integral holographic recording as part thereof and method and apparatus for manufacture. The identification element is formed using an interference pattern from...
4120559 Method of establishing secret information  
A method for establishing and reading secret information using holographic interference pattern techniques. A holographic plate is placed in a holder and exposed with a laser light reflected from...
4119361 Multilayer identification card  
A multi-ply identification card for storage of machine-readable information includes optical markings disposed between protective layers. At least one of the protective layers can be penetrated by...
4108367 Token and reader for vending machines  
A token for use in a vending machine consists of a plastic card having at least one pair of side-by-side holograms embossed thereon. A token reader includes means to guide a token into the path of...
4097279 Process for preparing an identification card  
A process for preparing identification cards which comprises spreading bonding material on a substrate, placing a transparent film over the coated substrate, superposing a photograph having opaque...
4053228 Finger identification  
A fingerpress is formed by pressing a finger against the back surface of a transparent glass plate and holding it in a predetermined position thereon. This fingerpress is interrogated by a light...
4014602 Identification card having a hologram superimposed on printed data  
A falsification-proof identity card comprises a first transparent layer on the underneath side of which conventional data is applied by printing technology. The card contains a holographic...
3894756 Identification card having a reference beam coded hologram  
An identification system for identifying persons, articles, documents and the like using a coded hologram which contains the desired identifying indicia in coded holographic form. Encoding of the...
3819911 IDENTIFICATION CARD DECODER  
Cards employing a light-modifying portion containing doubly encoded numbers are responsive to the illumination thereof for deriving a binary encoded pattern of light spots lying respectively on the...
3807859 INFORMATION INPUT SYSTEM USING HOLOGRAPHY  
An identification card having six-digit numerical information is prepared which comprises six information unit or digit hologram areas arranged in a predetermined direction, each having a hologram...
3781113 METHOD AND APPARATUS FOR PERSONAL IDENTIFICATION  
A method and apparatus for creating an encoded fingerprint card which consists of a hologram of a fingerprint created by a main illuminating beam and a reference beam on a sensitive photographic...
3743421 SYSTEM FOR IDENTIFYING PERSONNEL BY FINGERPRINT VERIFICATION AND METHOD THEREFOR  
An optical recognition device which employs a source of incoherent quasi-monochromatic light for illuminating an input prism upon which a fingertip to be verified as that of a particular individual...
Matches 201 - 250 out of 255 < 1 2 3 4 5 6 >