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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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
6995903 Microscope, a method for manufacturing a microscope and a method for operating a microscope  
A microscope including a source of light, adjustable in frequency and intensity, a method of operating such a microscope, and a method for manufacturing such a microscope are described. Typically,...
6987590 Patterned reflective optical structures  
An optical structure includes a light transmissive substrate having a surface relief pattern applied thereon, such as a hologram. A patterned layer of a reflective material is applied over portions...
6927885 Label with a diffractive bar code and reading arrangement for such labels  
A label ( 1 ) made from a layer composite ( 15 ) includes at least one machine-readable diffractive bar code ( 3 ) consisting of narrow rectangular fields ( 4 ) occupied by the optically active...
6909547 Security element with diffraction structures  
A security element ( 2 ) comprising a plastic laminate has a surface pattern ( 12 ) composed mosaic-like from surface elements ( 13; 14; 15 ). Shaped into at least two of the surface elements ( 14;...
6906861 Light-diffracting binary grating structure  
A light-diffractive binary grating structure has a microscopic mesa structure ( 2 ) whose plateaux ( 5 ) are separated by valleys ( 4 ) of substantially rectangular cross-section, wherein the...
6903850 Security device  
A security device has a substrate formed with a surface relief defining an optically variable effect generating structure. At least two different reflection enhancing materials are provided on, or...
6898009 Diffractive display  
The present invention is directed to an improvement in a diffractive display suitable for presenting graphic and the like displays. Broadly, a novel embodiment is realized from a holographic...
6876472 Optical feature, in particular for documents of value, and a manufacturing method for the later individualization or data storage  
The invention relates to an optical feature, in particular for documents of value, having at least one at least dual-channel hologram for the holographic reconstruction of different images from...
6833956 Diffractive structure with interstitial elements  
A diffractive device has a surface relief structure which, when illuminated by a light source, generates one or more diffraction images which are observable from particular ranges of viewing angles...
6822795 Dynamic image device with diffractive optical element  
Invisible different monochromatic images are inscribed in a diffractive optical element. Each of the images appears when a specific light source is on and image disappears when the specific light...
6791756 System and method for efficient illumination in color projection displays  
A multilevel optical phase element is illuminated with a light source having a plurality of wavelengths of interest. The multilevel phase element disperses light from the light source by...
6765704 Optical device  
An optical device for security and anti-counterfeit applications comprises a holographic diffractive structure ( 8 ) that generates a holographic optically variable image by diffraction that...
6700705 Structure arrangement having an optical-diffraction effect  
In order to improve a structure arrangement comprising a plurality of portions having a relief structure with an optical-diffraction effect, in particular for visually identifiable optical security...
6621607 Diffractive display  
The present invention is directed to an improvement in a diffractive display suitable for presenting graphic and the like displays. Broadly, a novel embodiment is realized from a holographic...
6583933 Reflective diffraction grating  
Reflective diffraction grating. A focused ion beam (FIB) micromilling apparatus is used to store color images in a durable medium by milling away portions of the surface of the medium to produce a...
6552831 Active and passive holographic optical based curved surface element  
Disclosed is a curved surface element (e.g., light bulb, ornament, light pipe, etc.) which has at least a portion thereof (inner or outer surface) covered with a holographic diffraction grating...
6540381 Spectral light tube  
A tube has walls consisting totally or partially of a first diffraction grating with its ruled surface aligned perpendicular to the length of the tube to disperse a field of rainbow colored light...
6507419 Illumination system using optical feedback  
Disclosed is an illumination system using optical feedback to maintain a predetermined illumination output. The illumination system employs an electrically controllable optical filter for filtering...
6466372 Systems for projecting images from diffractive phase plates  
A system for projecting images is provided having a group of diffractive phase plates each encoded with different image information which have phase shifts aligned to reconstruct visible images in...
6465077 Black line screens and methods of making same  
A viewing device comprising a media having a lineal pattern of alternating transparent and non-transparent regions printed thereon, wherein the non-transparent regions comprise edges having an Edge...
6452699 Controlled diffraction efficiency far field viewing devices  
This invention pertains to the design of optimized far field viewing devices that simultaneously produce bright far field holographic light patterns and achieve good see-through performance to...
6417968 Diffractive surface pattern  
A surface pattern is made up of surface elements ( 1 to 7 ) which are arranged in a mosaic-like fashion and which have microscopic relief structures. The surface elements ( 2 to 6 ) which are...
6417967 System and method for efficient illumination in color projection displays  
An illumination system for a color projection display. In one embodiment a broad spectrum light source illuminates a multilevel optical phase element which disperses the broad spectrum light from...
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...
6359734 Surface pattern  
A surface pattern ( 1 ) has N visually recognizable patterns which are composed of optically diffractive, microscopically fine relief structures, plane mirror faces or absorbing or scattering...
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...
6324004 Planar patterns with superimposed diffraction gratings  
A surface pattern (1) is composed of elements (2 to 5) which are arranged in a mosaic-like fashion and of which at least one pattern is formed from a background element (4) and a pixel (2) with...
6285472 Active and passive holographic optical based curved surface elements  
Disclosed is a curved surface element (e.g., light bulb, ornament, light pipe, etc.) which has at least a portion thereof (inner or outer surface) covered with a holographic diffraction grating...
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...
6262845 Apparatus and method for generating partially coherent illumination for photolithography  
The present invention introduces a novel scatter plate into the optical path of source light used for illuminating a replicated object. The scatter plate has been designed to interrupt a focused,...
6246521 Compact lighting device  
A compact illumination device intended especially for illuminating an active matrix in a monochromatic or trichromatic display device. This device includes a source and collimating device in order...
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...
6193376 Display apparatus  
A display apparatus of the present invention includes: an illumination optical system for emitting illumination light; a reflective display panel divided into a plurality of pixels, illuminated by...
6157487 Optically variable surface pattern  
An optically variable surface pattern includes at least one graphic representation producing an achromatic impression when viewed in visible light over a certain angular range without noticeable...
RE36878 Multi-colored material using rainbow grating  
A decorative multi-colored material and method of making same using rainbow gratings simultaneously evidence different color patterns which change through the color spectrum. The patterns are...
6101036 Embossed diffraction grating alone and in combination with changeable image display  
A static diffracting grating display system provides a fixed image representing high digital content information. A plurality of physical diffracting features are fixed into the surface of a...
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...
6011650 Decorative optical display apparatus  
A decorative optical display (20) utilizing a reflective diffraction grating (94) or a transmissive diffraction grating (304) and a plurality of polychromatic light sources (60) disposed around...
Matches 1 - 50 out of 104 1 2 3 >