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8976434 Apparatus and method for collimating diffused light using a compound holographic optical element  
A collimator can be made of a compound holographic optical element made of three holographic optical elements. The first reflection holographic optical element will have recorded within it...
8654421 Exposure device and image forming device  
There is provided an exposure device including: a light-emitting element array in which plural light-emitting elements are arrayed in a predetermined direction; and a hologram element array in...
8547412 Image forming apparatus  
An image forming apparatus includes: a light source; a photosensitive member; a brushless motor including a stator and a rotor; a rotary polygon mirror rotated by the brushless motor; an...
8085312 Image input apparatus, image input method, personal authentication apparatus, and electronic apparatus  
An image input apparatus that inputs an image of an object residing within a living body is disclosed. The image input apparatus includes a light source that irradiates near infrared light on the...
8047660 Projection system and method including spatial light modulator and compact diffractive optics  
A method and apparatus for a projection display system includes a spatial light modulator and a volume illumination hologram. The spatial light modulator comprises a digital micromirror device,...
7651227 Projection system and method including spatial light modulator and compact diffractive optics  
A method and apparatus for a projection display system includes a spatial light modulator and a volume illumination hologram. The spatial light modulator comprises a digital micromirror device,...
7457017 Screens to be used with a system for the magnification and projection of images in substantially three-dimensional format  
The three-dimensional system discloses screens (12, 16) that produce magnified three-dimensional images (6) that can be projected before large audiences who can view said images without special...
7443553 Holographic sensors and their production  
An array of discrete sensors disposed on a substrate, each sensor comprising a holographic support medium and a hologram disposed throughout the volume of the medium, whereby interaction with an...
7417618 Lighting apparatus and projection type display, and driving method therefor  
A lighting apparatus used for a projection type display is provided, which can change the incident ray volume to an optical modulation device without changing the optical output intensity of the...
7236300 Transmission type screen using a fly-eye lens  
A transmission type screen including a fly-eye lens having a convex shape on one side thereof and a light-shielding layer provided on an opposite side of a lens surface of the fly-eye lens and...
7121668 Device and method for generating an image for projection  
In an image projection device, interferences between the light source and the light modulator leading to visible interferences in the projected image are suppressed by an interference cancellation...
7055967 Illumination systems employing corrective optics for use in reduced étendue color video projection systems  
An illumination system is provided with at least a first arc lamp positioned on the first axis of a first reflecting device. An aspherical corrector plate is positioned to receive the light rays...
6870650 Illumination device and method for laser projector  
Systems and methods for providing illumination suitable for imaging devices such as laser projection systems. In one embodiment, a highly collimated (e.g., laser light) beam is passed through a...
6817530 Multiple image security features for identification documents and methods of making same  
A method for making a secure identification document with multiple images is provided. Information is provided to an information bearing layer, the information constructed and arranged to be...
6808271 Projection type display apparatus  
In order to achieve a great improvement in light utilizing efficiency, a projection type display apparatus for obliquely projecting an original image onto a screen includes a first projection...
6736512 Pixel element for a three-dimensional screen  
A pixel element for a 3D display, wherein multiple substantially collimated controllable light beams are emitted in multiple directions, with each light beam associated with a predetermined...
6719429 Anamorphic illumination of micro-electromechanical display devices employed in multimedia projectors  
Micro-electromechanical display device (“MDD”)-based multimedia projectors (90, 120) of this invention employ an arc lamp (32), a color modulator (42), and anamorphic illumination systems (94,...
6654399 Semiconductor light projection apparatus and distance measurement apparatus  
In performing an light emitting operation using a plurality of semiconductor light-emitting devices, these semiconductor light-emitting devices are lighted up such that the driving current is...
6619801 Projection type image display apparatus realizing three-dimensional image  
A projection type image display apparatus includes a light source emitting light, a polarization device transmitting light polarized in one direction of incident light emitted from the light...
6568810 Illumination optical system and projection display apparatus incorporating the same  
An illumination optical system comprises a first multi-lens array, a second multi-lens array, and a polarization conversion module. An optical modulation device of a projector is irradiated with...
6396463 Image projection apparatus  
There is provided an image projection apparatus which is small and in which a picture image can be stably observed while high resolution is maintained. The image projection apparatus is structured...
6366369 Transmission hologram fabrication process  
The invention relates to a process capable of fabricating a variety of transmission holograms having a simple structure, a wide visible range and a large area and comprising the first stage of...
6281993 Phase shifting element for optical information processing storing systems  
Optical information processor and storage of pixelated data pattern in a Fourier plane of a lens as achieved by a plurality of optical elements operating with a spatial light modulator. A laser...
6256122 Device for the elimination of the zero order beam emerging from a hologram illuminated in polarized light  
Device for elimination of the zero order beam emerging from holograms illuminated in polarized light includes a birefringent plate (5) illuminated by both said zero order beam (3) and by a...
6043913 Apparatus for producing dot matrix hologram  
An apparatus for producing a dot matrix hologram is provided, which can fabricate a hologram of high quality, simplify the construction, and reduce the cost. This apparatus includes a laser source...
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...
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...
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...
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...
5831757 Multiple cylinder deflection system  
The present invention provides precise constant velocity linear motion for reading and writing information over an area. The present invention uses a multiple cylinder linear feed unit to move a...
5812313 Method of providing a magnified image of a periodical image pattern  
Method and display for providing a magnified image of a two-dimensional, periodic image pattern. An apertured sheet is arranged in front of the two-dimensional, periodic image pattern preferably...
5764389 Holographic color filters for display applications, and operating method  
A holographic optical filter separates broadband electromagnetic radiation into spectral components corresponding to different spectral regions and then images this radiation onto pixels of a...
5754278 Image transfer illumination system and method  
An illumination system for an image transfer system having a gate at which an original image to be transferred can be positioned, to provide a transfer region of illumination at the gate,...
5659420 Confocal optical apparatus  
A confocal optical apparatus comprising a light source, a first aperture portion for passing light emitted from the light source and obtaining a point source, an objective lens for causing the...
5623360 Time delay beam formation  
Optical systems are disclosed which are capable of generating and rapidly changing time delays of electrical signals for true time delay beam formation and beam steering and for signal processing...
5610733 Beam-homogenizer  
A beam homogenizer for converting an incident beam of non-uniform spatial power or energy distribution into an output beam of uniform spatial power or energy distribution. The homogenizer is a...
5548418 Holographic structured light generator  
The present invention is a holographic structured light generator (HSLG) for generating an array of an arbitrary number of laser beamlets from a single laser beam using a point laser light source...
5465238 Optical random access memory having multiple state data spots for extended storage capacity  
An optical memory is disclosed in which data is stored in an optical data layer capable of selectively altering light such as by changeable transmissivity or polarization. The data is illuminated...
5455692 Dual image CHMSLS  
A hologram structure for use in a holographic center high mounted stoplight system for a vehicle. The hologram structure includes first and second hologram layers laminarly secured to each other,...
5387989 Modified technique for fabricating low noise floodlit CHMSL holograms  
A hologram structure for use in a holographic center high mounted stoplight system for a vehicle. The hologram structure includes a hologram layer having a plurality of holographic lenses formed...
5295010 Amplifying and synchronizing signals in optical computing system  
Amplification and synchronization of photon pulses in optical computing chips is accomplished by placing parametric amplifying devices at predetermined spatial locations in the light conductive...
5289298 Multiplex grating holographic floodlit center high mounted stoplight  
A hologram structure for use in a holographic center high mounted stoplight system for a vehicle. The hologram structure includes a hologram layer having a plurality of single grating holograms...
5278679 Sub-diffraction limited focusing lenses  
This invention relates to the fabrication of lenses which can focus a light beam to a spot size which is smaller than that allowed by diffraction theory. A composite lens function is constructed...
5258863 Method for effecting illumination of an arbitrary aperture  
The present invention discloses a novel method for effecting illumination of an arbitrary aperture. The method comprises a first step of providing a developed hologram comprising a plurality of...
5206499 Strapdown stellar sensor and holographic multiple field of view telescope therefor  
A star tracker for generating positional information for a vehicle includes a holographic telescope (150) having one or more fields of view for imaging stellar objects. The telescope includes a...
5187360 Aspheric lens having a plurality of lenslets disposed substantially contiguously in an array  
The lens includes a plurality of lenslets arranged substantially contiguously in an array. Each lenslet is adapted to receive radiation from a particular zone not substantially overlapping with...
5170269 Programmable optical interconnect system  
This is an optical interconnect system. The system comprises: at least one signal transmitter; at least two signal receivers; at least one DMD in the same plane as the signal transmitter; and a...
5129041 Optical neural network processing element with multiple holographic element interconnects  
A neural network processing element uses primarily optical components to model a biological neuron having both spatial and temporal dependence. The neural network processing element includes a...
4998787 Method of fabricating a multiple holographic lens  
Method of fabricating a coherently exposed multiple holographic lens including a first step of fabricating an incoherently exposed master multiple holographic lens with an array of overlapping...
4993790 Holographic lenticular screen stereoscopic avoinics display apparatus  
Holographic techniques are utilized to create a lens or magnifying effect in a surface film. This surface film deflects the light rays so that they leave the film at a much different angle then...

Matches 1 - 50 out of 93 1 2 >