|
Match
|
Document |
Document Title |
|
|
6240200 |
Optical fingerprint imager with improved optics
A fingerprint imaging system includes a light source, an optical platen having a light receiving face positioned such that the light from the source impinges thereon, and a finger receiving face...
|
|
|
6231196 |
Laser marking process and products
The reflective backing of a mirror or other product is marked, engraved, scribed, or decorated with a laser beam to produce a decorative display assembly with a laser-enhanced image thereon. This...
|
|
|
6211976 |
Holographic projection system
Holographic optical elements (HOEs) can be used in systems and methods for providing illumination and for projecting images. The HOEs may be switchable HOEs, whose diffractive properties can be...
|
|
|
6211977 |
Method of producing a holographic projection screen for displaying a three-dimensional color images
A method of producing a holographic screen for projection of the three-dimensional color images is proposed, where a narrow and elongate slit-shaped diffuser is recorded on the hologram as an...
|
|
|
6195185 |
Image recording apparatus
An image recording apparatus is capable of reducing a vibration of a hologram recording medium so that a holographic stereogram which provides an excellent reproduced image can be prepared in a...
|
|
|
6191876 |
Light diffusion control by electrically reconfigurable holographic optical elements
A system and a method of displaying projected images on a projection screen of the system include one or more reconfigurable holographic optical elements (HOEs) in the screen to optically...
|
|
|
6185016 |
System for generating an image
A system for generating an image comprising an illumination system having a light source and a plurality of holographic devices switchable between an active state wherein light from the light...
|
|
|
6185015 |
Compact planar optical correlator
A planar optical correlator including at least first and second optical substrates (30, 32), through which light propagates by means of total internal reflection, at least first and second...
|
|
|
6181448 |
Multi-laser scanning unit
A multi-laser scanning unit (LSU) in which scanning lines incident parallel onto a photoreceptor have the same scanning direction. The multi-laser scanning unit includes: a driving source for...
|
|
|
6175431 |
Projection systems based on reconfigurable holographic optics
A projection system and a method of displaying a projected input image on a projection screen of the system utilize one or more reconfigurable holographic optical elements (HOEs) to optically...
|
|
|
6172778 |
Compact optical crossbar switch
A planar optical crossbar switch comprising two thin planar substrates, on each of which are recorded or attached two holographic lenses between which light propagates by means of total internal...
|
|
|
6169614 |
Wedged-shape holographic collector
A diffractive collector for an optical scanner includes a wedged-shaped substrate having holographic grating provided on a front surface, a conical-shaped back surface, and at least one detector....
|
|
|
6169613 |
Planar holographic optical device for beam expansion and display
A holographic optical device includes a light transmissive substrate carrying first and second laternally separated holographic optical elements. The first holographic optical element diffracts...
|
|
|
6166389 |
Apparatus having a light source and a sol-gel monolithic diffuser
An apparatus for projecting light on to a predetermined area includes a light source and a transparent element disposed adjacent the light source where in the transparent element is made from a...
|
|
|
6166833 |
Zero-order computer generated phase-only holograms
A method for encoding zero-order phase-only holograms, and the holograms so encoded. The amplitude and phase of each point of a discrete mathematical transform, such as a Fourier transform, of an...
|
|
|
6166834 |
Display apparatus and method for forming hologram suitable for the display apparatus
A dichroic or trichromatic transparent display apparatus through which a background view is seen comprises a transparent substrate, a hologram formed on a rear face of the transparent substrate, a...
|
|
|
6157471 |
Display panel with compensation by holographic birefringent films
A display panel having compensation using holographic birefringent films. Due to the natural birefringence of liquid crystals, contrast suffers when a liquid crystal cell is viewed at an oblique...
|
|
|
6144470 |
Holographic optical element with castellated aperture
In an optical positioning system, a holographic optical element having a plurality of rectangular apertures has predetermined ones of its aperture edges castellated or notched in order to null out...
|
|
|
6140660 |
Optical synthetic aperture array
A synthetic aperture system for producing a non-periodic pattern in a region of overlap. The system includes a source of electromagnetic radiation producing a plurality of electromagnetic beams, a...
|
|
|
6141124 |
Color filter and color picture display device using the same
A color filter which, in a reflection type color picture projector using a polarized light component as a projection light, improve the utilization factor of light and a color picture display...
|
|
|
6137637 |
Prism-type objective lens for the pickup head of an optical disc drive capable of driving two types of optical discs
A prism-type objective lens is provided for use in the pickup head of an optical disc drive capable of driving two types of optical discs such as a CD and a DVD. The prism-type objective lens...
|
|
|
6132048 |
Single display assembly having selective reflectors to view indicia
A single display assembly (10) has an electronically controllable display (11) with a plurality of display elements (12) and sandwiched by two support plates (13,14), two polarizers (15,16) and two...
|
|
|
6124954 |
Projection screen based on reconfigurable holographic optics for implementation in head-mounted displays
A head-mounted display system and a method of displaying scenes within the system include two or more reconfigurable holographic optical elements (HOEs) in a holographic diffuser of the system. The...
|
|
|
6122080 |
Finder equipped with an indicator
The invention relates to a space-saving yet high-quality real image type finder indicator wherein an optical member such as a hologram is used for a device for indicating various information in a...
|
|
|
6122079 |
Chromatically-adjusted holographically illuminated image-providing display element
Reflective image-providing displays illuminated with chromatically-adjusted holographically diffused light are provided. In one particular and preferred embodiment, a liquid crystal display...
|
|
|
6122465 |
Reflective liquid crystal display having a hologram color filter
A color liquid crystal display device includes a liquid crystal element, an optical path conversion element array and a hologram. The liquid crystal element has a blue pixel B, a red pixel R, and a...
|
|
|
6118559 |
Broadband diffractive diffuser and associated methods
A broadband diffractive diffuser contains at least three levels, with approximately a phase shift of π between at least two of the at least three levels. Such a diffuser provides light with more...
|
|
|
6115153 |
Reflection-type hologram scale and optical displacement measuring apparatus therewith
A holographic grating 12 is formed on one surface of a scale substrate 11 in such a manner that a light source is disposed over the other surface of the scale substrate 11. The scale substrate 11...
|
|
|
6108109 |
Method, device and optical package with enhanced temperature stability
The present invention provides a method, device and optical package (10,22) for enhancing a temperature stability by controlling a variable characteristic of an optical package and optical...
|
|
|
6101008 |
Autostereoscopic display based on electrically switchable holograms
An autostereoscopic display system and a method of displaying a scene in a stereoscopic form on a screen of the system include two or more reconfigurable holographic optical element (HOE) stacks in...
|
|
|
6101007 |
One-visual-point image display apparatus and multi-visual-points image display apparatus
A screen hologram image is reproduced on or near a plane of a hologram plate. A dynamic image is displayed at a position crossing an optical path of light beam for illumination to view a dynamic...
|
|
|
6095652 |
Projection system
A projection system incorporating a screen (2, 14) with a substantially achromatic response in a direction substantially perpendicular to the plane of the screen. The screen (2, 14) comprises a...
|
|
|
6094283 |
Holographic display with switchable aspect ratio
A holographic display system comprising left and right optical systems is disclosed. The optical systems each comprise an image display operable to display an input image and first and second...
|
|
|
6091521 |
Light collection from diffractive displays
A diffractive display system and a method of collecting first order light beams from a diffractive display of the system utilize holographic optical elements (HOEs) to deflect one of two first...
|
|
|
6088076 |
Liquid crystal display apparatus using holographic optical element
A liquid crystal display apparatus uses a holographic optical element to split the light from a light source for generating white light to R, G and B wavelength light components. The split light...
|
|
|
6082862 |
Image tiling technique based on electrically switchable holograms
A projection system and a method displaying a high resolution composite image on a projection screen include a number of reconfigurable holographic optical elements (HOEs) in the projection optics...
|
|
|
6081354 |
Holographic reflector for liquid crystal display
A reflective liquid crystal display contains, a holographic reflector that provides either a white or more neutral background color to the display when viewed with ambient white light. The...
|
|
|
6078423 |
Stereoscopic display device
A display device includes an image bearing device for generating one or more viewable images, optical elements for generating one or more viewing zones for viewing the viewable images, and an...
|
|
|
6076732 |
Two-motor reflection system with hologram
A holographic spectroscope for a two-motor reflection system for generating scanning patterns in which a light beam is first reflected by a first reflector connected to a first motor electrically...
|
|
|
6075651 |
Compact collimating apparatus
A compact, lightweight, multi-wavelength display system which can be used as a collimating eyepiece is provided. The system utilizes a polarization selective optical element, or PS element, that...
|
|
|
6075627 |
Diffusing imager and associated methods
A diffusing function and a lens function are provided on a single surface. Such a structure may be formed from a computer generated hologram including free form regions having a phase shift...
|
|
|
6072607 |
Optical pickup device
An optical pickup device of the present invention includes a substrate having at least a major surface, a semiconductor laser provided on the surface of the substrate for emitting laser beam, a...
|
|
|
6072606 |
Close-lit holographic nightlight display lighting system
A holographic display system provides a holographic image suitable for use as a nightlight in a dimly lit environment wherein the only light in the field of view of the user is essentially the...
|
|
|
6069987 |
Optical device for an optical network unit and manufacturing method therefor
An optical device for use in optical communication optical network units, having an aptitude for efficient production, manufacturing cost reduction and size reduction, comprising: a first CGH...
|
|
|
6067176 |
Reflective projection-type displaying apparatus
A projection-type displaying apparatus is disclosed. The apparatus has a coupling prism, a glass substrate joined to the coupling prism and a liquid crystal display panel containing pixel...
|
|
|
6064500 |
Holographic optical device and method of manufacture
A method of producing an optical element including a photopolymer layer between two holograms is disclosed. The holograms have the same diffraction spacing and refractive index, but the first...
|
|
|
6057947 |
Enhanced raster scanning assembly
An optical assembly utilizing a novel optical element. The assembly includes a tunable source of input radiation; an optical element that can receive at least a portion of the input radiation and...
|
|
|
6049402 |
Multiplexed phase-conjugate holographic data storage using a buffer hologram
An optical storage system, which includes a temporary buffer and an optical storage medium, allows the practical combination of phase-conjugation and hologram multiplexing. The temporary buffer...
|
|
|
6046856 |
Image projector and illumination device used for the image projector
In an illumination device used for a color image projector, indefinitely polarized light beams from a light source are separated by a polarization beam splitter into two linearly polarized light...
|
|
|
6043911 |
Optical source module with two wavelengths and optical pickup apparatus using the same
A light source module with two wavelengths that is adapted to generate laser beams different in wavelength. In the light source module, a hologram optical element (HOE) is used to allow a first...
|