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7209270 Method and apparatus for phase correlation holographic drive  
A holographic storage apparatus for recording data in a holographic medium includes at least one light source for generating a reference beam and a signal beam. The reference beam is preferably a...
7197160 Geographic information systems using digital watermarks  
The present invention relates to systems and methods for managing images and related information. In one implementation, geographic information system (GIS) layer information is registered or...
7151623 Holographic data-storage medium  
In an example holographic data storage medium, which has a polymer film which serves as a storage layer and can be changed locally by heating, the polymer film is set up as a top layer of the data...
7148468 Mirror angle measurement and servo control apparatus for holographic digital data storage system  
A mirror angle measurement and a servo control apparatus for a Holographic Digital Data Storage (HDDS) system is disclosed. The mirror angle measurement apparatus includes a first mirror having a...
7149014 Holographic memory using beam steering  
A method, apparatus, and system provide the ability for storing holograms at high speed. A single laser diode emits a collimated laser beam to both write to and read from a photorefractice...
7142336 Recording medium and hologram reader  
A recording medium including a storage part to hold a medium identifier intrinsic to each recording medium, and a hologram generated using a reference beam modulated with the medium identifier....
7136206 Method and apparatus for implementing a multi-channel tunable filter  
The present invention provides a multi-channel tunable filter and methods for making such a filter. In one embodiment, the filter comprises a bank of gratings imprinted into a filter material,...
7126730 Electro-holographic lens  
An electro-holographic lens device comprising: an active layer made from a transparent photo-refractive material, whose refractive index may be locally modified by locally applying an electric...
7112359 Method and apparatus for multilayer optical articles  
The present invention provides a method and apparatus for a multilayer optical articles. A method comprises forming a first multilayer article with a first substrate and a second substrate with a...
7102803 Apparatus and method of using a thermal design for wavelength division multiplexed holographic filters  
A temperature compensated apparatus for filtering light is comprised of a holographically recorded grating defined in a photosensitive layer for providing optical filtration for light incident on...
7094502 Methods for transferring holographic images into metal surfaces  
A method for impressing holographic images or holograms in the surface of metal objects such as aluminum cans, sheet metal or metal foil. The surfaces of metal shims and print rolls bearing...
7072114 Optical pickup using an optical phase plate and which is compatible with optical recording media of different types  
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an...
7072538 Planar reconfigurable optical add/drop module  
A reconfigurable optical add/drop module (ROADM) for dynamically adding or dropping various wavelengths of an optical signal without having to physically replace the module with a...
7048689 Ultrasonic receiving apparatus and ultrasonic receiving method  
To reduce the cost while maintaining the real time environment in receiving ultrasonic waves in an ultrasonic receiving apparatus which is capable of reducing changes in detection sensitivity due...
7034970 Optical recording medium and method for producing such an optical recording medium  
The present invention relates to a method for producing an optical recording medium. In the method, on the surface of a recording layer formed by spin-coating a first coating solution containing a...
7023592 Band-pass filter and image display apparatus  
A band-pass filter has a reflecting optical element having a fixed reflection angle selection region for wavelengths of a given region, and has an optical path such that reflection is performed at...
6995883 Security document with an optical security area  
A security document, such as a banknote, includes an optical security area having a first periodic optical structure and a security sign provided on the security area and configured to...
6987591 Volume hologram  
A volume hologram for modifying a characteristic of an input microwave beam and a method for manufacturing thereof are disclosed. The hologram is fabricated from a multi-layer artificial...
6985293 Optical pickup using an optical phase plate and which is compatible with optical media for different types  
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an...
6967755 Holographic ROM system including an alignment apparatus for aligning a holographic medium and a mask  
A holographic ROM system includes an alignment apparatus for aligning a holographic medium for storing data and a mask with patterns of the data. The alignment apparatus has a beam irradiating...
6961161 Holographic recording and reproducing apparatus  
An image detected by a CCD image sensor 108 when only a non-modulated signal light is applied to a holographic memory 120 in which data is not recorded is ensured as a noise pattern. When data is...
6961159 Holographic viewing device, and computer-generated hologram for the same  
The invention relates to a holographic viewing device that enables a given pattern to be properly viewed in place of light sources in a scene and is easy to fabricate and assemble with consistent...
6961160 Recording material for holograms, manufacturing method thereof, recording medium for holograms, hologram recording method and hologram reproduction method  
A recording material for holograms includes a metal oxide porous body with an oxygen donor substance in the pores. In addition, a method manufactures a recording material for holograms that...
6958836 Hologram carrier  
The invention relates to a hologram carrier having a hologram surface and a reference surface to facilitate the acquisition of the hologram surface by a device. In this case, provision is made for...
6956681 Integrated reading and writing of a hologram with a rotated reference beam polarization  
A method for monitoring diffraction while recording a hologram includes: generating a source beam; generating a data beam by projecting a first component of the source beam through a data source,...
6952295 Hologram screen and hologram display  
A hologram screen 1 displays an image by diffracting and scattering image light 31 projected from an image projection apparatus 2. An upward/downward light scattering device 13, which scatters...
6940653 Radiation conditioning system  
A holographic imaging system and method includes a radiation source for generating radiation. A data base has a set of elements, each element is indicative of a trajectory of a light ray exiting a...
6924912 Holographic screen  
A holographic screen for displaying images by diffracting and dispersing an image beam projected by an image projector comprises a main hologram for diffracting and dispersing an incident image...
6909529 Method and apparatus for phase correlation holographic drive  
A holographic storage apparatus for recording data in a holographic medium includes at least one light source for generating a reference beam and a signal beam. The reference beam is preferably a...
6900904 Distributed system for producing holographic stereograms on-demand from various types of source material  
A distributed system for producing holographic stereograms (holograms). A data acquisition station is typically remote from image processing, printing, and replicating stations. The data...
6894815 Reference beam absorbers-blockers  
In accordance with teachings of the present invention, a device accomplishes the task of reducing or preventing reflections of the reference beam off a diffuser from striking the holographic...
6870649 Holographic viewing device, and computer-generated hologram for the same  
The invention relates to a holographic viewing device that enables a bright reconstructed pattern to be viewed in place of light sources in a scene while a spot due to zero-order transmitted light...
6854850 Multiple images from a single projector  
An image projection system capable of projecting images to multiple screens or viewing surfaces. The system uses a moveable mirror to direct the projected images to the screens. The moveable...
6850345 Sandwich holographic disk construction with thin molded substrates  
In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate...
6849149 Hologram laminates  
There are provided a hologram laminate and a hologram label which do not involve any problem in the production process per se of forging preventive labels using a volume hologram, can provide a...
6850346 Method and apparatus for storing and retrieving a sequence of digital page data  
In a storing mode of an apparatus for storing and retrieving a sequence of digital page data, a first/second complex reference beam and a modulated signal beam converge on a storing location to...
6844949 Method and apparatus for storing and retrieving digital page data  
In a storing mode of an apparatus for sequentially storing and retrieving digital page data, a first and second complex reference beams and a modulated and second signal beams converge on a...
6844946 Tunable holographic filter  
An optical add/drop filter is formed using a hologram which is tuned to a wavelength in an optical signal. The diffraction condition of the hologram may be varied to vary the in add or drop content.
6842272 Hologram plate and its fabrication process  
The invention provides a hologram plate which is used with the double-focus replication process, and which is integrated with a spacer to impart marring resistance thereto, and is integrated with...
6842271 Rain sensor, in particular for a motor vehicle  
A rain sensor for a motor vehicle, having a transmitter emitting radiation, a receiver, and a holographically embodied diffractive element that has a linear-grating-like structure.
6833938 Variable hologram element, and optical device using the same  
The invention relates to an optical element with variable optical properties, which ensures that the amount of light available is increased, and an optical device using the same. In a liquid...
6829067 Method and apparatus for implementing a multi-channel tunable filter  
The present invention provides a multi-channel tunable filter and methods for making such a filter. In one embodiment, the filter comprises a bank of gratings imprinted into a filter material,...
6829066 Hologram screen  
The present invention provides a hologram screen which is capable of preventing separation, and damage to, a hologram film and which permits the hologram film to be reused easily. The present...
6825959 Holographic viewing device, and computer-generated hologram for the same  
The invention relates to a holographic viewing device that has a high diffraction efficiency, enables bright patterns with less noticeable conjugate or higher-order images to be viewed in place of...
6822772 Holographic display  
The invention relates to a holographic display for storing and reducing a spatial structure, having a holographic screen forming the master hologram, and having a projection device which...
6818270 Hologram laminate and hologram label  
A hologram laminate allows traces of separation of the hologram to be clearly left on both the adherend and the hologram label and hence makes it possible to prevent reuse of the hologram and is...
6801721 Polarization mode dispersion compensator for optical fiber communication systems  
Optical infinite impulse response (IIR) filters are efficient polarization mode dispersion (PMD) compensators, requiring fewer stages than finite impulse response (FIR) filters. IIR filter...
6801722 Optical tracking system with reflective fiber  
An optical tracking system for use in an optical receiver of an optical communication system includes a first focus unit, a tracker, and an optical fiber having an angled tip. The first focus unit...
6797366 Color shifting film articles  
Multilayer polymeric films and other optical bodies are provided which is useful in making colored mirrors and polarizers. The films are characterized by a change in color as a function of viewing...
6775036 Holographic shrink wrap element and method for manufacture thereof  
A holographic shrink wrap element containing a shrink wrap film and a layer on the shrink wrap film, wherein the layer contains a holographic image. A process for preparing a holographic shrink...