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Document Title |
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7377656 |
Projector
A projector of rear-projection type including a light source that outputs a laser beam and a scanner that scans a screen with the laser beam. When a laser beam with energy exceeds an accessible...
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7367682 |
Color image projection arrangement and method
A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for causing selected pixels in a raster pattern to be...
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7357512 |
Color image projection system and method
An image projection system projects an image on a projection screen having a phosphor for converting incident violet light into green light which, together with red and blue light, creates the...
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7354157 |
Image display device and light source device
An image display device includes a laser light source, a wavelength conversion element converting a wavelength of a light beam emitted from the laser light source into a predetermined wavelength,...
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7307770 |
Hologram imaging device and method of using same
A hologram imaging device for obtaining hologram images and associated document markings which are commonly being used for document verification is disclosed. The imaging device comprises a housing...
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7167287 |
Hologram imaging device and method of using same
A hologram imaging device for obtaining hologram images and associated document markings which are commonly being used for document verification is disclosed. The imaging device comprises a housing...
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7165844 |
Projector type display apparatus
There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes...
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7123393 |
Method and apparatus for holographic recording and retrieval
A wavelength multiplexed holographic system includes a wavelength tunable blue-violet laser and a controller for wavelength multiplexing. A method of holographic data recording includes providing a...
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7027197 |
Pulsed-laser systems and methods for producing holographic stereograms
Pre-sensitization techniques can be used in conjunction with holographic recording materials to allow high quality holographic stereograms to be recorded in those holographic recording materials...
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6906836 |
Full color holographic image combiner system
A device, such as a heads up display, includes equipment for generating a virtual image in the field of view of an observer. The equipment includes at least one light source having a wavelength...
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6874893 |
Laser display system
A laser display system is disclosed, to remove speckles displayed on a screen, which includes at least one laser as light source, at least one filter transmitting or reflecting a particular...
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6873444 |
Volume holograms in transparent materials
This invention discloses a method of producing, in a solid transparent material ( 3 ), a hologram of an object; the method includes the steps of: developing a three-dimensional mathematical model...
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6865309 |
Optical coupling device, method of producing the same, and optical apparatus using the same
An optical coupling device, a method of producing the same, and an optical apparatus using the same. A light transmitting medium of the optical coupling device is made of optical fibers to transmit...
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6809846 |
Optical switch and optical network
Disclosed is an optical switch for transmitting or shutting down an input light signal in accordance with a set switching state. The optical switch comprises first and second optical amplifiers...
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6806982 |
Pulsed-laser systems and methods for producing holographic stereograms
Pre-sensitization techniques can be used in conjunction with holographic recording materials to allow high quality holographic stereograms to be recorded in those holographic recording materials...
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6768567 |
Synchrotron-based EUV lithography illuminator simulator
A lithographic illuminator to illuminate a reticle to be imaged with a range of angles is provided. The illumination can be employed to generate a pattern in the pupil of the imaging system, where...
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6639699 |
Optical system for recording or replicating hologram
The invention provides a hologram recording or replicating optical system wherein a misalignment-with-time of the center of a laser generated beam is automatically corrected so that the color...
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6633419 |
Production method and device for hologram
A method and apparatus for producing a hologram using a two-beam laser interference exposure process, comprising the steps of using as a light source a femtosecond laser having a pulse width of...
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6549309 |
Holography apparatus, method and product
Holographic patterns are produced by utilizing a laser to illuminate a workpiece with an interference pattern, with sufficient laser power to ablate the workpiece where it is illuminated by the...
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6404518 |
Full-color hologram and method of producing the same
A full-color hologram capable of generating a bright image and reproducing colors in all color regions is formed by multiple recording or multilayer recording with four different dominant...
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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...
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6348983 |
Holographic storage medium having enhanced temperature operating range and method of manufacturing the same
A holographic storage medium, a method of manufacturing the holographic storage medium and a holographic storage device incorporating the storage medium. In one embodiment, the holographic storage...
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6297894 |
Optical scheme for holographic imaging of complex diffractive elements in materials
This invention discloses optical system and method for writing a refractive index pattern in a light transmissive or light absorbing sample. A light source for providing a short pulse laser beam in...
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6130958 |
Method for reconstructing the image of an object scanned with a laser imaging apparatus
A method for reconstructing an image of a scanned object comprises the steps of collecting object data by scanning the object with a laser beam and detecting the light passing through the object;...
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6101210 |
External cavity laser
External Cavity Laser An external cavity laser comprising first and second feedback means with an optical gain medium (2) therebetween, one of the feedback means is provided by a grating (4) formed...
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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...
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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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6023352 |
Methods and systems for thermal fixing and/or erasing of holograms
The invention features methods and systems for thermally fixing or erasing a laser-induced hologram in a photorefractive material, for example, by directing laser radiation having a wavelength...
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5668647 |
Method and apparatus and for processing ultrafast optical signals
An apparatus and method are disclosed for providing holographic matched filters for application in all-optical holographic processing of ultrahigh-speed optical data. A scaled spatial image of...
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5530564 |
Holographic interference exposing device
A holographic interference exposing device using a visible laser source and a chopper to easily align the optical system while confirming the light path of the laser beam with the naked eye. The...
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5479238 |
High resolution imagery systems and methods
The current limits of resolution of multi-element optical systems are exceeded by reducing the number of elements while introducing at the critical aperture a blazed transmission grating having...
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5438441 |
Method and apparatus for material processing with a laser controlled by a holographic element
Apparatus and method for performing material processing, such as drilling or welding, with a high intensity laser beam operating in the infrared spectrum, using a reflective holographic optical...
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5416616 |
Incoherent/coherent readout of double angularly multiplexed volume holographic optical elements
Novel apparatuses for readout of multiplexed volume holographic optical elements, based on parallel incoherent/coherent double angularly multiplexed holographic recording and readout principles,...
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5383038 |
Holographic optical memory using semiconductor microcrystallite doped glasses and method using same
There is described a semiconductor microcrystallite doped glass that exhibits SHG, and a method of preparing, or encoding, a semiconductor microcrystallite doped glass by the simultaneous injection...
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5351324 |
Fiber optic security seal including plural Bragg gratings
An optical security system enables the integrity of a container seal to be remotely interrogated. A plurality of Bragg gratings is written holographically into the core of at least one optical...
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5289252 |
Linear frequency modulation control for FM laser radar
A closed loop frequency control system for maintaining accurate linearity in the transmitted signal (60) in a linear frequency modulated (LFM) chirped laser radar system. A correction signal (50),...
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5270853 |
Method and apparatus for imaging an object in or through a scattering medium by using multiple-wave mixing
A method and apparatus for imaging an object that is part of, embedded in, or viewed through a scattering medium is provided. A broadband stochastic beam generator, such as a broadband laser,...
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5260814 |
Production of full color stereographic holograms
A method and apparatus for producing temporally coherent, full color holograms is disclosed whereby a linear array of stereographically positioned cameras are simultaneously triggered to obtain a...
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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...
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5241616 |
Optical pattern recognition system utilizing resonator array
Separate features of a composite image in a field of view illuminated by a aser beam are respectively monitored by low level optical cavity resonators of an array from which optical data outputs...
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5198915 |
Underwater inspection apparatus and method
A camera for use in holography comprises a source of coherent radiation (55), a beam splitter (55,56) for splitting radiation from said source into a reference and a recording beam, a film holder...
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5192867 |
Electron optical measurement apparatus
In an electron holography apparatus having an electron source, a specimen holder, an electron lens system, and an electron biprism, the electron biprism is so constructed as to be rotatable about...
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5189532 |
Edge-illuminated narrow bandwidth holographic filter
This invention concerns a method and apparatus of using the relatively thin holographic material of a transmission holographic optical element in such a manner whereby a narrow spectral bandwidth...
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5182780 |
Optical backplane interconnecting circuit boards
A system for interconnection of a stack of circuit boards, wherein each of at least a plurality of the circuit boards has an end region carrying one or more light transmitters or light receivers,...
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5134504 |
Method and apparatus for producing full color stereographic holograms
A method and apparatus for producing temporally coherent, full color holograms is disclosed whereby a linear array of stereographically positioned cameras are simultaneously triggered to obtain a...
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4988154 |
Method and apparatus of producing an arcuate rainbow hologram
A two-dimensional, white light illuminable arcuate rainbow hologram that is potentially viewable from 360° is formed by limiting the information content of a wave front representing a reflection...
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4988153 |
Holographic memory read by a laser array
A holographic memory read-out system in which multiple pages of information are angularly multiplexed onto a recording medium, either planar or volume. For read-out of the hologram, a selected one...
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4964698 |
System for selective laser assisted plating
A method directed to a system for splitting, imaging and focusing a pulsing laser beam, such as from an excimer laser, onto a workpiece to improve the subsequent metal plating of such workpiece. A...
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4938550 |
Holographic deflection device
A holographic deflection device having a tunable laser, and at least one hologram for deflecting light incident thereupon from the tunable laser, so that the deflection of the light can be...
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4879532 |
Method and apparatus for phase conjugate optical modulation
A method and apparatus for phase conjugate optical modulation involves creating a phase hologram within a nonlinear medium by overlapping, within the nonlinear medium, a pair of laser beams,...
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