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7606133 |
Hologram recording/reproducing device and hologram reproducing device
A hologram recording/reproducing device records information onto a medium by a light beam emitted from a laser light source and passing through a forward path, the forward path having optical...
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7596463 |
Method and storage medium for calibrating a holographic storage system
The present invention relates to a method for calibrating a holographic storage system, and to an apparatus for reading from and/or writing to holographic storage media and a holographic storage...
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7595923 |
Optical head and multiplexing methods for reflection type holographic storage using spatial filtering
The invention describes a collinear optical head for a reflection-type holographic recording medium, which is capable of obtaining an increased capacity. The optical head presented here allows for...
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7595922 |
Hologram reconstructing apparatus and hologram reconstructing method
A hologram reconstructing apparatus configured to irradiate a hologram recording medium that stores an interference pattern of a signal beam spatially modulated by data displayed on a spatial...
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7593304 |
Apparatus and method for recording and reproducing hologram, and spatial light modulator therefor
A hologram recording/reproducing apparatus includes a recording/reproducing optical system that guides at least one of an information beam and a reference beam to an optical recording medium; a...
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7589876 |
Holographic memory reproduction method and apparatus
A method and apparatus for performing reproduction position servo-control without reducing the recording capacity of a holographic recording medium. Upon the reproduction of a holographic recording...
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7577075 |
Optical information recording and reproducing apparatus, and optical information recording and reproducing method
An optical information recording and reproducing apparatus, comprising: an optical system for performing recording and reproduction using holography, including a first laser source, a spatial light...
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7576900 |
System and method for holographic storage
A system and a method for holographic storage mainly involve forming a holographic interference pattern in a holographic recording medium. The holographic storage system utilizes a light source to...
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7570567 |
Multi-layered holographic read-only memory and data retrieval method
An inexpensive multi-layered holographic read-only memory having a large capacity is provided. In the memory in which single-mode slab waveguides are multi-layered, a periodic scattering center...
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7567494 |
Apparatus and method for recording and reproducing hologram
The apparatus includes an address information writer that writes address information representing the position of the unit sectors in the recording medium when recording the hologram in each of the...
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7564761 |
Recording and reproducing device
A recording and reproducing device includes: a reference light irradiating section; a spatial light modulating section for generating information light; an information light irradiating section for...
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7554893 |
Recording/reproducing apparatus for optical recording medium with partial reading controller for partial reading of information
A reproducing apparatus for an optical recording medium, comprising: a reference beam irradiator for irradiating an optical recording medium on which information is recorded by holography with a...
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7551538 |
Optical recording apparatus and optical head
To provide an optical recording apparatus capable of effectively suppressing useless fixation to an information-unrecorded area during a fixing process with a simple structure, and an optical head....
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7549111 |
Apparatus, system, and method for converting between serial data and encoded holographic data
An apparatus, system, and method are disclosed for converting between serial data and encoded holographic data. The apparatus for converting between serial data and encoded holographic data is...
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7548359 |
Double-wavelength light source unit and optical head device having four diffraction gratings
A double-wavelength light source unit capable of stable signal detection, is realized. The double-wavelength light source unit comprises a double-wavelength light source, a photodetector and a...
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7545723 |
Holographic recording medium, method for manufacturing the same, and holographic recording-reproducing system
In a holographic recording medium, noise is prevented from being generated by servo light in a recording layer without scarifying recording regions. A holographic recording medium 12 has a servo...
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7544919 |
Focus assist system and method
The invention relates to image focus. In particular, it relates to a focus assist system that conveys focus level data to a user. There are a wide variety of different display methods, including,...
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7539116 |
Holographic digital data storage system compatible with holographic and reflective medium
In a holographic digital data storage system, a light source generates a reference beam, a holographic optical element saves a plurality of interference patterns between the reference beam and a...
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7535609 |
Hologram recording method and device
A hologram recording method comprising recording information of signal light as a reflection-type hologram on an optical recording medium, by illuminating the signal light and reference light on a...
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7532373 |
Holographic recording method, holographic recording apparatus, holographic memory reproducing method, holographic memory reproducing apparatus, holographic recording and reproducing apparatus, and holographic recording medium
The pitch of light beam spots on a light receiving surface of an address detector upon search of information recorded on a holographic recording medium is decreased to reduce a distance between the...
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7525894 |
Apparatus and method for recording and reproducing optical information
In recording of information, an information beam as S-polarization is incident on an optical information recording medium. After passing through the optical information recording medium, the...
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7519224 |
Method and apparatus for compensating data image reproduced from holographic system
The present invention provides a method and apparatus for preprocessing a page image reproduced from a storage medium in a holographic system. The present invention calculates pixel sums for each...
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7518974 |
Recording and reproducing apparatus
A recording and reproducing apparatus includes a light source to emit a laser beam, an information light beam irradiation unit to irradiate a medium with an information light beam, a reference...
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7518973 |
Holographic optical information reproducing apparatus
It is an object of the invention to provide an optical information reproducing apparatus and an optical information storing/reproducing apparatus which utilize holography, wherein noise due to...
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7518972 |
Holographic multiplex recording method
A holographic multiplex recording method is provided in which remaining dynamic range in each recording area is made more uniform upon holographic multiplex recording. In this holographic recording...
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7515521 |
Hologram recording and reproducing apparatus
A hologram recording and reproducing apparatus minimizes reproduction errors by servo control on the tilting of a reference beam relative to a hologram recording medium. The apparatus includes an...
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7512054 |
Method for optical recording, method for optical reproducing, optical recording medium, and optical recording and reproducing apparatus utilizing holography
The present invention relates to a method for optical recording in which information is recorded on an optical recording media utilizing holography and to a method for optical reproducing in which...
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7505389 |
Information processing device and information recording medium
There is provided an information processing device which is capable of suppressing generation of stray light at the time of recording and reproduction of information, thus enabling quality...
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7502297 |
Hologram recording apparatus, hologram reproducing apparatus, hologram recording method, and hologram reproducing method
A hologram recording apparatus includes a rotating mechanism for rotating a hologram recording medium, a first light source for emitting first laser light, a modulator for modulating the intensity...
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7496024 |
Hologram apparatus and hologram recording method
The present invention provides a hologram apparatus for recording an interference fringe of a signal beam and a reference beam having a speckle pattern in a recording area of a hologram recording...
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7496023 |
Method, program and system of forming visual image on optical disk
A visible image forming method is performed for forming a visible image on an optical disk by an optical disk recording apparatus, which is designed for applying a laser beam onto an optical disk...
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7492692 |
Hologram recording and reproducing apparatus
An example hologram recording and reproducing apparatus includes a recording unit which records information on a holographic recording medium by recording interference fringes formed by irradiation...
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7492691 |
Supplemental memory having media directory
Disclosed is a holographic data storage device including holographic media for containing data, writing data to and reading data from. The storage device also includes at least one supplemental...
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7486424 |
Holographic recording apparatus
The present invention relates to a holographic recording apparatus that records on a multiple basis information on a holographic memory. An object of the present invention is to provide a...
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7477588 |
Apparatus for and method of recording and reproducing holograms
The number M of a plurality of multiplexed recording mediums to be recorded in a projected area S on the surface of a recording medium satisfies the equation (1′) where n represents the...
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7476487 |
Photosensitive semiconductor nanocrystals, photosensitive composition comprising semiconductor nanocrystals and method for forming semiconductor nanocrystal pattern using the same
Semiconductor nanocrystals surface-coordinated with a compound containing a photosensitive functional group, a photosensitive composition comprising semiconductor nanocrystals, and a method for...
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7471609 |
Hologram reproduction apparatus and reproduction method
A hologram reproduction apparatus includes a light-receiving unit such as a two-dimensional sensor which obtains two-dimensionally modulated image data, and an A/D converter which A/D-converts...
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7468941 |
Recording and reproducing apparatus
A recording and reproducing apparatus according to the present invention includes a light source for emitting a light beam, a spatial modulating part for modulating the light beam to create...
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7457016 |
Optical system for processing CD, DVD and holographic digital data
An optical system capable of selectively processing CD, DVD and holographic digital data is provided. The system includes a beam generation unit providing a linearly polarized light beam; a beam...
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7453785 |
Method for generating a holograrm on a disc surface
A method for generating a hologram on a disc surface provides for the use of calibration spots burned onto a disc with an accuracy greater than one half wavelength of light.
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7444047 |
Multiplexing optical system
A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have...
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7436749 |
Hologram recording and reproduction apparatus
A hologram recording and reproduction apparatus is disclosed which can raise the degree of freedom in design to achieve miniaturization thereof and can raise the hologram recording density of the...
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7433293 |
Optical disc recording medium and method of manufacturing the same
An optical disc recording medium of the present invention comprises a first substrate ( 11 ) having a physically pre-formatted surface; a reflective film ( 12 ) formed on the pre-formatted surface...
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7430294 |
Method and apparatus for the encryption of data
There is disclosed a method and apparatus for coding data, for the purpose of preventing unauthorised readout of information. In the method, user information is converted into digital data (UD),...
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7428206 |
Holographic information recording apparatus
It is an object of the invention to improve a recording capacity density by removing part of diffracted light and by making a recording region in relation to a recording medium in the efficient...
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7428205 |
Multi-layer holographic data reading method
A plurality of holographic recording media are positioned one above the other on an optical substrate and contain conventional stationary or moving imagery or data sets such as binary data...
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7426168 |
Hologram erasing method and hologram erasing apparatus
The present invention discloses a hologram erasing method, in which a predetermined hologram is erased by irradiating a predetermined region of a hologram recording medium in which the hologram to...
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7411872 |
Servo-tracking and three-dimensional alignment in page-based data optical storage
A system for page-based optical data storage includes a sensor array positioned to track a data page when the data page is optically read from or recorded to a storage medium. A servo mechanism is...
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7411708 |
Method and apparatus for phase-encoded homogenized Fourier transform holographic data storage and recovery
An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a...
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7408865 |
Optical information recording apparatus and optical information reproducing apparatus using holography
It is an object of the invention to record and reproduce information successfully even when light having small energy is used for hologram. A drive means to move a collimator lens according to...
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