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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 6134031 | Polarization control optical space switch The present invention is directed to an optical space switch accommodating a plurality of input light paths and output light paths. The optical space switch comprises a plurality of polarization control optical switches, each consisting essentially of: po... | 10/17/2000 |
| 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 reconfigurable HOEs may be configured to perform simple o... | 09/26/2000 |
| 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 green pixel G, which are arranged plainly, and a liquid c... | 09/19/2000 |
| 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 component is presented comprising a liquid crystal display elemen... | 09/19/2000 |
| 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 finder. In a finder optical system has an objective system,... | 09/19/2000 |
| 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 than two phasor vectors at the zero order. The presence of ... | 09/12/2000 |
| 6115152 | Holographic illumination 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 controlled. Described herein is a method of combining light f... | 09/05/2000 |
| 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 is formed of a transparent material. A reflection film 13 i... | 09/05/2000 |
| 6111670 | Hologram device and method for producing the same A hologram of an increased size using a single color laser, capable of executing a full color regeneration in a desired view angle and a method for producing the hologram. A plurality of photo-sensitive members are independently exposed to obtain respecti... | 08/29/2000 |
| 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 interconnect system. The device includes an optical emitter (14) f... | 08/22/2000 |
| 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 the screen. The reconfigurable HOEs may be configured to ... | 08/08/2000 |
| 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 image on the screen hologram image. By using a plurality of ... | 08/08/2000 |
| 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 diffraction grating (4), means (5) for attenuating zero order... | 08/01/2000 |
| 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 holographic devices. The first holographic device is operable t... | 07/25/2000 |
| 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 order diffracted light beams that emerge from each diffracting... | 07/18/2000 |
| 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 components enter respective pixels of a liquid crystal cell ... | 07/11/2000 |
| 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 of the system. The reconfigurable HOEs of the projection o... | 07/04/2000 |
| 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 holographic reflector comprises a holographic recording film layer... | 06/27/2000 |
| 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 optical element with positive optical power. The elements are a... | 06/20/2000 |
| 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 connected to a first control circuit. A second reflector fo... | 06/20/2000 |
| 6075579 | Liquid crystal display device using a hologram, hologram scatter plate, and process of replicating a diffuse reflection type hologram The invention relates to a liquid crystal display device which enables a visual field range to be made wide and luminance drops to be reduced, so that bright displayed images can be presented, and provides a liquid crystal display device comprising, in or... | 06/13/2000 |
| 6075626 | Hologram A hologram has a hologram element 3 containing a photopolymer and a cover film 22 and cover plate 21 which cover its surfaces. An adhesive 1 is used for bonding the cover film to the hologram element and the cover plate to the hologram element. The hologr... | 06/13/2000 |
| 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 reflects one linear polarization state while transmitting ra... | 06/13/2000 |
| 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 associated therewith, i.e., the computer generated hologram being... | 06/13/2000 |
| 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 light diffracted into the holographic image being replayed. Th... | 06/06/2000 |
| 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 reflection-type diffraction grating oriented to the semicondu... | 06/06/2000 |
| 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 element 21 for converting a multiplexed light from the first in... | 05/30/2000 |
| 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 electrodes. A refractive index of the coupling prism is greater tha... | 05/23/2000 |
| 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 hologram has an efficiency of about one-half that of the second... | 05/16/2000 |
| 6055106 | Apparatus for applying optical gradient forces An apparatus and method for manipulating small dielectric particles. The apparatus and method involves use of a diffractive optical element which receives a laser beam and forms a plurality of light beams. These light beams are operated on by a telescope ... | 04/25/2000 |
| 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 receives an object light beam and a first reference light bea... | 04/11/2000 |
| 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 beams respectively having polarized planes perpendicularly i... | 04/04/2000 |
| 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 laser beam generated at a first light source and a second las... | 03/28/2000 |
| 6041027 | Optical pickup for using disks each having a different thickness An optical pickup capable of use with disks each having a different thickness, including two optical modules each having a light source having a different wavelength, and a photodetector for receiving reflected light. The optical pickup selects a proper l... | 03/21/2000 |
| 6040928 | Holographic desktop monitor A projection monitor and a method of displaying an output image on a viewing screen of the monitor utilize a number of reconfigurable holographic optical elements (HOEs), allowing the components of the monitor to be physically arranged in a compact config... | 03/21/2000 |
| 6038043 | Method for recording a holographic optical element A fingerprint sensor having a holographic phase grating glued on one right angle surface of a prism is described where a light source oriented normally relative to the hypotenuse surface of the prism illuminates an interface of the grating and finger surf... | 03/14/2000 |
| 6034797 | 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 allows the pickup head to be made more compact in size with red... | 03/07/2000 |
| 6025938 | Beam homogenizer A beam homogenizer that minimizes undesired intensity variations at the output plane caused by sharp breaks between facets in previous embodiments. The homogenizer includes a hologram made up of irregularly patterned diffractive fringes. An input beam ill... | 02/15/2000 |
| 6022126 | Laser pointer The laser pointer of this invention includes: a laser pointer main body for emitting a visible laser beam; and a deflection optical element disposed on the central axis of the laser beam and adapted to deflect the direction along which the emitted laser b... | 02/08/2000 |
| 6023354 | Semiconductor Bragg reflector and a method of fabricating said reflector A semiconductor Bragg reflector and to a method of fabricating it. The reflector comprises a plurality of stacked layers on a substrate of a III-V type material, one of the stacked layers forming a holographic grating. The layer forming the grating compri... | 02/08/2000 |
