| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359004000 | Recyclable | 8 |
| 20130135701 | HOLOGRAPHY DEVICES, THREE-DIMENSIONAL IMAGE DISPLAY APPARATUSES INCLUDING THE SAME, AND METHODS OF PROCESSING HOLOGRAPHY IMAGES - A holography device may include a light reaction layer configured to react with light to form and remove a diffraction grating, and a metal thin film on the light reaction layer. When first light is incident on the metal thin film while the grating is formed in the light reaction layer, surface plasmon formed on the metal thin film may be diffracted so as to output a holography image. A method of processing a holography image may include recording the image on a holography device by irradiating first light to a light reaction layer to form a diffraction grating, outputting the image by irradiating second light to a metal thin film on the light reaction layer to diffract surface plasmon formed on the metal thin film, and deleting the image from the holography device by irradiating third light to the light reaction layer to remove the grating. | 05-30-2013 |
| 20140268262 | Non-mechanical digital/holographic wide angle control of one or more lasers beams. - An apparatus including a laser generating a plane wave beam, a first beam splitter splitting the plane wave beam into a first reference laser beam and at least one ideal input beam, at least one second beam splitter, and an angle-magnifying optical element. The at least one second beam splitter reflects the at least one ideal input beam through the angle-magnifying optical element to generate at least one distorted input beam. The apparatus further includes a focal plane array receiving the first reference laser beam and the at least one distorted input beam and recording at least one interference pattern generated by the first reference laser beam and the at least one distorted input beam. The apparatus further includes a spatial light modulator generating the at least one recorded interference pattern, receiving the reference laser beam, and transmitting at least one time-reversed output beam through the angle-magnifying optical element. | 09-18-2014 |
| 359005000 | Magnetic material | 1 |
| 20080259418 | DELETE RECYCLING OF HOLOGRAPHIC DATA STORAGE - Data hologram recycling systems, methods and computer program products are configured to arrange data for storage in the intermediate data storage as data segments which are replicas of holographic storage segments for destaging to the holographic data storage, and to determine retrieval for recycling of the destaged holographic storage segments to which aggregated requests for deletion are directed. The retrieval determination may be based on a plurality of policies. | 10-23-2008 |
| 359006000 | Sandwich having photoconductor | 1 |
| 20100165427 | HOLOGRAM RECORDING/REPRODUCING APPARATUS AND METHOD - An apparatus includes: a light source; a splitting unit that splits a light beam into an information beam and a reference beam; a spatial light modulator that modulates the information beam into a grating binary pattern having bright points and dark points; an irradiation unit that irradiates the reference beam and the information beam onto a hologram recording medium to record information corresponding to each of the regions of the spatial light modulator; a photodetector that detects a signal beam that is diffracted from the hologram recording medium by irradiating the hologram recording medium with a reproduction beam emitted by the light source; and a power detector that detects a difference of powers of signal beams detected by the photodetector at portions in the hologram recording medium corresponding to two of the regions of the spatial light modulator. | 07-01-2010 |
| 359007000 | Crystalline material | 4 |
| 20090046333 | System and Method Using a Voltage Kick-Off to Record a Hologram on a Photorefractive Polymer for 3D Holographic Display and Other Applications - An updateable system and method of recording a hologram on a media simultaneously reduces the writing time and increases persistence without sacrificing diffraction efficiency. A voltage kick-off technique controls the bias electric field applied to a photorefractive polymer media in conjunction with the application of the writing beams and dark decay. Essentially the voltage kick-off technique applies a high electric field above the optimal field while the writing beams are on and reduces the electric field when the writing beams are off during dark decay. The voltage kick-off technique produced two separate unexpected results. First, when the writing beams are turned off and the electric field is lowered the diffraction efficiency continues to increase until it reaches a maximum efficiency that is within a few percent of that achieved by writing at the optimal field until steady-state is achieved. Second, the decay time constant is much larger than expected producing a much longer persistence without sacrificing diffraction efficiency or writing time. | 02-19-2009 |
| 20100321748 | METHOD AND SYSTEM FOR RE-WRITING WITH A HOLOGRAPHIC STORAGE MEDIUM - A method and device for re-writing data on a holographic storage device is disclosed. First and second electro-optic modulators may phase shift the reference and data beams used to store data on the photorefractive crystal. When the reference beam is shifted 180° out of phase with respect to the data beam, the photorefractive crystal is erased. | 12-23-2010 |
| 20100321749 | METHOD AND APPARATUS FOR BULK ERASURE IN A HOLOGRAPHIC STORAGE SYSTEM - A method and system for bulk erasing in a holographic storage system is disclosed. The method may involve illuminating the entire volume storage region of a photorefractive crystal with a laser to achieve bulk erasure, or may involve selective erasure of a portion of a single written page. For bulk erasure of the entire photorefractive crystal the use of a separate laser or an incoherent light source is used. | 12-23-2010 |
| 20140198360 | DEVICE FOR RECORDING AND REPRODUCING HOLOGRAPHIC 3D IMAGE, AND METHOD FOR RECORDING AND REPRODUCING HOLOGRAPHIC 3D IMAGE - Devices and methods for recording and reproducing a holographic 3D image are provided. The devices for recording the holographic 3D image comprising: a laser generation unit for emitting a laser beam; a beam splitter unit configured to receive the laser beam from the laser generation unit and split the laser beam into a reference beam and an object beam directed to an object to be photographed; a photorefractive crystal configured to receive the reference beam from the beam splitter and the object beam diffused from the object to form a holographic 3D image; and a rotation unit configured to rotate the photorefractive crystal once every time one holographic 3D image is recorded. The holographic 3D image can be recorded and reproduced by the rotate the photorefractive crystal in light paths of recording and reproduction light beams, respectively. | 07-17-2014 |
