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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...
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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...
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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...
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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...
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6018402 |
Apparatus and method for phase-encoding off-axis spatial light modulators within holographic data systems
Embodiments of the invention include an off-axis amplitude and phase encoding optical system, apparatus and method of storage in which a holographic optical element (HOE) is used advantageously to...
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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...
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6008914 |
Laser transfer machining apparatus
The laser transfer machining apparatus comprises a shaping unit for shaping the laser beam so that the laser beam has a beam pattern which corresponds to a desired pattern to be machined in the...
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6005692 |
Light-emitting diode constructions
A light-emitting assembly defining a pixel comprising a series of red, green, and blue light-emitting segments in general alignment and connected by first and second electrodes. The light-emitting...
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6002500 |
Holographic screen including convex protrusions
A holographic screen of a rear projection type for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface. The holographic screen...
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6000804 |
Colored light retroreflective material and retroreflective hologram reconstructor using the same
To provide a retroreflective material which has high utilization efficiency of light and which can give a reflected light to various color tones: the retroreflective material in accordance with the...
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6002520 |
Illumination system for creating a desired irradiance profile using diffractive optical elements
An illumination system that comprises a light source, and, disposed in an optical path between the light source and the surface, converging imaging optics, and a diffractive array generator. The...
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5999281 |
Holographic projection screen combining an elliptical holographic diffuser and a cylindrical light-collimator
A projection screen having a construction well-suited for effecting lateral color constancy in rear screen projection display systems is disclosed. The projection screen includes a holographic...
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5999282 |
Color filter and color image display apparatus employing the filter
An improved color filter and a color image display apparatus employs the filter, the color filter has a hologram device for spectrally diffracting an incident light into plural light beams of...
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5995250 |
Method for manufacturing light beam scanning apparatus
A method of manufacturing a fixed hologram plate of a light-beam scanning apparatus for diffracting a light incident from a light source portion by a rotatable hologram, scanning by the diffracted...
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5978109 |
Superresolution scanning optical device
A superresolution scanning optical device has image forming means for forming the image of light from a coherent light source unit in the form of a fine spot on a conjugate face through an image...
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5973805 |
Antiglare inner mirror
An antiglare inner mirror includes a housing which is supported by a stay and is capable of inclining by an inclining device. A mirror main body is mounted on a front opening portion of the...
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5973806 |
System and method for steering Fresnel region data using cylindrical coordinates to access data locations in a holographic memory
Systems and methods for steering an optical path to gain access to data locations in a holographic memory cell (HMC). One of the systems includes: (1) first and second reflective elements locatable...
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5969832 |
Projection image display device
A projection image display device includes, a light source, an image display panel having a number of pixels and a vertical scanning function, an optical system for dividing light from the light...
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5963347 |
Holographic neurochip
The invention relates to an opto-electronic integrated circuit which is optically connected by holograms. An optimum arrangement for as high an integration density as possible of the light sources,...
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5963684 |
Multiple-wavelength optical transceiver
An optical demultiplexing apparatus is capable of spatially separating a multiplexed optical signal into two or more optical wavelength signals thereof. An input multiplexed optical signal present...
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5963345 |
Holographic stop sign
A warning indicator that comprises a lamp hidden adjacent to the roof of a vehicle, such as a school bus, and a transmission hologram decal containing a hologram that is mounted on a front or rear...
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5955221 |
Method and apparatus for fabrication of high gradient insulators with parallel surface conductors spaced less than one millimeter apart
Optical patterns and lithographic techniques are used as part of a process to embed parallel and evenly spaced conductors in the non-planar surfaces of an insulator to produce high gradient...
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5956106 |
Illuminated display with light source destructuring and shaping device
A light source destructuring and shaping device which both homogenizes and imparts predetermined directionality to light rays emanating from a light source is disclosed. The device comprises a...
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5946114 |
Optical filtering device and application to a liquid crystal projector
This optical filtering device includes a dichroic separator on the path of a light beam to be processed. According to the invention, it also includes a holographic filtering device situated in...
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5945201 |
Holographic identifier for garments
An identifying tag that includes a foil sheet having first and second opposing surfaces. The foil sheet is made from a mylar polyester foil and a holographic image appears on its first surface. The...
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5940194 |
Real time-determination of interconnect metrology using binary computer-generated holograms
Holographic test structures on a semiconductor wafer are used to provide real-time analysis of upstream fabrication processing parameters. The test structures comprise reflective segments within...
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5936751 |
Reflective image-providing display viewed with holographically diffused ambient light
Reflective image-providing displays viewed with holographically diffused light are provided. As one particular and preferred embodiment, a liquid crystal display component is presented comprising a...
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5930011 |
Holographic Multicolor optical elements for use in liquid crystal displays and methods of making the elements
The present invention relates to holographic multicolor optical elements for use as multicolor filters in liquid crystal displays and methods of making the elements. The elements can be used as...
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5930012 |
Polarization independent optical switch
A polarisation independent optical switch is constituted by a light input (6), a diffractive and re-configurable liquid crystal device (8), a collimating lens (7) for distributing the input light...
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5926293 |
Holographic transflector
A light-diffusing holographic transflector comprising a holographic layer and a transflective layer is disclosed. The transflector is capable under good ambient lighting conditions of illuminating...
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5920409 |
Optoelectronic devices using persistent photoconductivity
A compound semiconductor that is suitably doped to exhibit the DX effect is irradiated with an optical beam of spatially varying intensity whereby localized regions of persistently higher...
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5917622 |
Light device with holographic optics
A device for providing illumination to a specifically defined region including in combination an extended and diffuse light source and a holographic optical element mounted in spaced relation to...
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5917459 |
Holographic head up display
A color holographic head up display which can be mounted on, for example, an airplane or automobile for projecting a color image displayed on a screen. The color holographic head up display in...
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5909293 |
Hologram unit of optical pickup and method of attaching hologram plate using the same
Disclosed are a hologram unit of an optical pickup which has a main hologram and auxiliary alignment holograms around the main hologram thereof and a method of attaching a hologram plate of the...
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5898511 |
Process for making holograms and holography device
A plurality of hologram elements are simultaneously exposed to a constructing light while they are arranged in the form of a stack, so that the incident beam can be uniform within the exposure...
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5896208 |
Master hologram for the production of copy-proof holograms
A method for the production of holograms proof against copying and imitation possessing authenticity features, which are copies of a master hologram. In accordance with the invention as a master...
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5894359 |
Color filter and color display apparatus
A color filter includes a plurality of color pixels, and a first hologram diffracting an incident light beam into a first diffraction-resultant light beam. The color filter also includes a second...
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5892599 |
Miniature fingerprint sensor using a trapezoidal prism and a holographic optical element
A miniaturized fingerprint sensor has a holographic phase grating glued to a base surface of a trapezoidal prism which operates on light totally internally reflecting from a finger-coverslip...
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5892600 |
Spectacle lens structure with a planar reflective outer surface
A spectacle lens structure includes a light transmitting base plate having a serrated surface defining a hologram. A thin reflective coating having a planar outer surface is provided on the...
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5886799 |
Polarizing holographic reflector module and method for the manufacture thereof
The present invention provides a polarizing holographic reflector module useful in the manufacture of a holographically-illuminated liquid crystal display assembly by combination thereof with a...
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5880861 |
Illumination optical system
An illumination optical system to be disposed between a light source and a specimen comprises, in order from a light source side, a collector lens, a diffusing plate having a diffusing surface, a...
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5877824 |
System for illuminating a liquid-crystal screen
This system for illuminating a liquid-crystal screen comprises a light source which emits an unpolarized light beam (F). A polarizing splitter device (PBS) receives this unpolarized light beam and...
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5854697 |
Waveguide hologram illuminators
A waveguide hologram illumination system is based on thin substrate waveguides bearing a hologram on the surface through which light is diffracted out. A light source is optically coupled to the...
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5850300 |
Diffractive beam homogenizer having free-form fringes
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...
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5838468 |
Method and system for forming fine patterns using hologram
The method for forming a fine pattern on a substrate disclosed includes a step of preparing a hologram having a pattern, a step of irradiating material waves (de Broglie waves) such as neutral...
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5838436 |
Multi-purpose quantum computing
Method and apparatus are provided for a general purpose photonic computer. A data signal is input through an encoder to encode such signal with an instruction. The encoded signal is transmitted by...
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5835247 |
Device for the folding of the optical paths of two right-hand and left-hand image projectors of a binocular helmet visor with projection on visor
A display system for a binocular helmet visor having image projectors projecting images on a semi-reflecting internal wall of the visor of the helmet. One image faces the right eye and another...
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5832147 |
Holographic optical interconnect system and method for board-to-board and chip-to-chip communication interconnections
A holographic optical interconnect system (100) and method (200) provide flexible, efficient interconnection of a plurality of circuit boards CBs and a plurality of integrated circuit chips. Each...
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5828471 |
Illumination system and display device
An illumination system includes a polarization selective holographic element, which includes at least one optically anisotropic material, arranged to separate light of a first polarization type...
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5822091 |
Extreme depth-of-field optical lens and holographic projector system for its production
A modulated index lens containing a subsurface zeroth order coherent microlenticular mosaic defined by an index gradient adds a normalizing function to the vergences or parallactic angles of...
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