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| Number | Title | Issue Date |
| 7443586 | Display device using single-panel diffractive light modulator Disclosed herein is a display device using a single-panel diffractive light modulator. The display device includes a light source unit, a condensing unit, an illumination unit, a diffractive light modulator, a projection unit, a filter unit, and a distortion correct... | 10/28/2008 |
| 7440188 | Diffractive optical element A conventional diffractive optical element (DOE), which consists of repetition of a unit pattern , has an advantage of applicability of the Fast Fourier Transform algorithm to calculate diffraction beam spots intensities on lattice points on an image plane. But, the... | 10/21/2008 |
| 7418170 | Optical device and virtual image display device A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide (13) to guide, by internal total refl... | 08/26/2008 |
| 7388694 | Method, program and system for image drawing Laser information is prepared which indicates the irradiation interval and intensity level to be irradiated on an optical disc in advance. Then, when image drawing is indicated together with the indication of the forming spacing for pits, a laser is controlled so as... | 06/17/2008 |
| 7367759 | Surface relief grating image machining process and product A surface relief grating (SRG) image machining process and/or product. For the SRG image machining process a material and a cutting tool are provided. The material is contacted by the cutting tool to a predetermined depth. The cutting tool is rotated to cut the mate... | 05/06/2008 |
| 7362493 | Micromirror and post arrangements on substrates A micromirror of a micromirror array of a spatial light modulator used in display systems comprises a mirror plate attached to a hinge that is supported by two posts formed on a substrate. Also the mirror plate is operable to rotate along a rotation axis that is par... | 04/22/2008 |
| 7358513 | Optical device and method of manufacture The present invention provides for a method of producing an optical device by means of electron beam lithography and including the step of varying the characteristics of the electron beam spot during formation of the device and also an apparatus for producing diffra... | 04/15/2008 |
| 7349158 | Diffraction grating-based encoded micro-particles for multiplexed experiments Microparticles 8 includes an optical substrate 10 having at least one diffraction grating 12 disposed therein. The grating 12 having a plurality of colocated pitches Λ which represent a unique identification digital code that is detected... | 03/25/2008 |
| 7301682 | Optically variable security attribute The invention relates to an optically variable security attribute for documents, securities, bank notes, packaging and goods. The task of the invention is to provide an optically variable security attribute with covert detectable characteristics to improve sa... | 11/27/2007 |
| 7298533 | Optical films for creating unique optical effects An optical layer comprises a sheet of material having a surface. The surface comprises a plurality of optical elements. The optical elements are comprised of microscopic patterns in the surface that cooperate to produce an image. Each of the elements has a focal len... | 11/20/2007 |
| 7286764 | Reconfigurable modulator-based optical add-and-drop multiplexer An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the first signal at a first location, the first location configured to actuat... | 10/23/2007 |
| 7281810 | Optical device and methods of manufacture An optical device which generates an optically variable image, the image being optically variable in that it varies according to the position of observation, is manufactured by dividing an optically invariable image into multiple pixels. Color component values are d... | 10/16/2007 |
| 7270428 | 2D/3D data projector The present solution relates to a 2D/3D data projector, which comprises: A data projector, the data projector comprising: at least one micro display having an image to be projected, at least one source unit comprising at least one light source chip and at least one ... | 09/18/2007 |
| 7258915 | Flake for covert security applications Covert flakes having one or more symbols and/or a selected shape are used in a composition, such as ink or paint, to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the covert flakes are covert pigment f... | 08/21/2007 |
| 7256937 | Structured polarizer and method for making the same A structured polarizer (linear polarizing filter) with side-by-side in a plane (lateral) regions having different polarization directions, complete extinction and complete transparency, is presented with two superpositioned planes (polarizers) with a polarizer whose... | 08/14/2007 |
| 7248408 | Color display apparatus using one panel diffractive-type optical modulator Disclosed herein is a color display apparatus using a one-panel diffractive-type optical modulator. The color display apparatus includes a plurality of light sources, an illumination lens system, a diffractive-type optical modulator, a filter system, and a projectio... | 07/24/2007 |
| 7245406 | Method for forming fine concavo-convex patterns, method for producing optical diffraction structure, and method for copying optical diffraction structure A method for forming fine concavo-convex patterns by using a relief formation material 3 having a relief formation layer 2 composed of a resin having thermoplasticity and a relief pattern sheet 6 having on a surface thereof fine concavo-convex p... | 07/17/2007 |
| 7241489 | Opaque flake for covert security applications Opaque flakes, such as pigment or bright flake used in paints and inks, have a selected shape and/or other indicia to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the opaque covert flakes match the vi... | 07/10/2007 |
| 7239734 | Authentication of identification documents and banknotes The present invention provides methods and systems that are helpful authentication of physical and electronic documents like financial documents and identification documents. Steganographic indicia plays a role in some of our implementations. In other implementation... | 07/03/2007 |
| 7224528 | Optically variable security devices A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an optical interference pattern such as a holographic image pattern or an optical diffraction pattern thereon. A color shi... | 05/29/2007 |
| 7221512 | Light control material for displaying color information, and images A light control material is provided for displaying color images having microstructures either on its surface or within the material which reflect a selected color and bandwidth of light in accordance with their physical characteristics. In an exemplary embodiment, ... | 05/22/2007 |
| 7215450 | Optically variable element The present invention relates to an optically variable element having surface portions with achromatic surface structures and different scatter, diffraction and reflection characteristics. The achromatic surface structures are combined with a thin-film structure, wh... | 05/08/2007 |
| 7215461 | MEMS devices with increased damping for suspended movable structures In one embodiment, a light modulator includes a substrate and a number of modulator elements disposed above and spaced apart from the substrate. Each modulator element has an optically active portion adapted to receive light incident thereon, and a support portion o... | 05/08/2007 |
| 7204284 | Tire comprising a colored design and process for obtaining it Tire made of a rubber-based material of black color comprising at least one design on an outer surface of the said tire, the material being a diene elastomer or rubber, the design having on its outer surface at least one light diffraction grating formed of a plurali... | 04/17/2007 |
| 7199911 | Optical structure An optical device for security and anti-counterfeit applications has a holographic diffractive structure that includes a discrete region that in response to white light illumination generates a holographic image by a process of diffraction of light in one embodiment... | 04/03/2007 |
| 7194105 | Authentication of documents and articles by moiré patterns The present invention relies on the moiré patterns generated when superposing a base layer made of base band patterns and a revealing line grating (revealing layer). The produced moiré patterns comprise an enlargement and a transformation of the individual pattern... | 03/20/2007 |
| 7192175 | Backlighting light pipe for illuminating a flat-panel display A light pipe includes a surface provided with a pattern that has diffractive properties, where the pattern has uniform, mutually different areas on the surface such that some of the areas are configured to distribute light from a light input end of the light pipe to... | 03/20/2007 |
| 7190522 | Chemical synthesis using diffraction grating-based encoded optical elements An optical identification element having a synthesized chemical attached thereto includes an optical substrate having at least one diffraction grating disposed therein, the grating having a resultant refractive variation at a grating location, said grating being emb... | 03/13/2007 |
| 7182476 | Optical device and methods of manufacture An optical device which generates an optically variable image, the image being optically variable in that it varies according to the position of observation, is manufactured by dividing an optically invariable image into multiple pixels. Color component values are d... | 02/27/2007 |
| 7177081 | High contrast grating light valve type device A grating light valve has with a plurality of spaced reflective ribbons are spatially arranged over a substrate with reflective surfaces. The grating light valve is configured to optimized the conditions for constructive and destructive interference with an incident... | 02/13/2007 |
| 7167297 | Micromirror array In order to minimize light diffraction along the direction of switching and more particularly light diffraction into the acceptance cone of the collection optics, in the present invention, micromirrors are provided which are not rectangular. Also, in order to minimi... | 01/23/2007 |
| 7163317 | Color-changing apparatus, and associated method, for a light assembly Color-changing apparatus, and an associated method, for a lighting assembly. One or more dichroic filters are selectably positioned in the path of a light beam generated by a light source. A positioner supportively positions the dichroic filter and effectuates its t... | 01/16/2007 |
| 7161720 | Embedded information carrier for optical data In a system for authenticating information, a holographic element, including a first layer of optical information in a first coded pattern and a second layer of optical information in a second coded pattern is inserted into a reader. The reader includes an opening i... | 01/09/2007 |
| 7158096 | Compact, head-mountable display device with suspended eyepiece assembly A compact, lightweight, head-mountable display device is provided for transmitting an image to a user's eye. The device includes a projection system including a display attached at one end to a head-mountable support fixture. An eyepiece assembly is attached to a se... | 01/02/2007 |
| 7159112 | Decryption of graphics data in a graphics processing pipeline Encrypted graphics data is transmitted between systems or components of a system. The data is decrypted within a graphics processor or other recipient device that has been provided with an appropriate key. In one embodiment, encryption is performed by perturbing sel... | 01/02/2007 |
| 7144617 | Diffractive security element A security element (2) comprising a reflective, optically variable surface pattern (3) which is embedded in a layer composite of plastic material and which can be visually recognized from predetermined observation directions is formed from a mosaic of ... | 12/05/2006 |
| 7131380 | EB pattern profile printing The present invention provides a printing process and a printed product in which a coating is combined with an additive that lowers the surface tension of the dried coating. The coating pattern is printed on a substrate, and is cured using electron beam (“EB”) p... | 11/07/2006 |
| 7126755 | Method and apparatus for labeling using diffraction grating-based encoded optical identification elements A method and apparatus for labeling an item using diffraction grating-based encoded optical identification elements 8 includes an optical substrate 10 having at least one diffraction grating 12 disposed therein. The grating 12 has one or ... | 10/24/2006 |
| 7116380 | Video projector and optical light valve therefor A video projector apparatus including a linear array of individually addressable reflective active elements, an optical system including a light source and providing a linear light pattern focused on said linear array and from which is created an image of the linear... | 10/03/2006 |
| 7113320 | GLV based fiber optic transmitter A communications transmitter is disclosed that utilizes a grating light valve (GLV) to impose information on an optical signal. The communications transmitter further includes at least one laser light source, a frequency dispersing device, an electrostatic modulator... | 09/26/2006 |
