Patent application number | Description | Published |
20080219128 | OPTICAL PICKUP, OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS AND METHOD FOR OPTICALLY RECORDING AND REPRODUCING INFORMATION - An optical pickup for recording a hologram by using an angle multiplexing method. An optical beam is separated into two beams, a signal beam and a reference beam having different convergence/divergence degrees, by using an optical component such as a diffraction lens. The signal and reference beams are made incident upon the same objective, and the optical component or the objective lens is moved in a direction perpendicular to an optical axis, to thereby realize angle multiplex recording. If an optical information recording medium is inclined, the optical component or the objective lens is moved along the direction along which the optical information recording medium moved to change an angle of the reference beam incident upon the optical information recording medium and compensate for degradation of a reproduction signal. | 09-11-2008 |
20080225670 | OPTICAL PICKUP, OPTICAL INFORMATION RECORDING APPARATUS AND OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS USING THE OPTICAL PICKUP - In holographic recording, it is important to form stably an interference fringe between a reference beam and a signal beam in a holographic storage medium. To suppress factors degrading stability of the interference fringe, such as fluctuation of atmospheric air, position displacement of optical components and the like during propagation of the reference and signal beams, an optical pickup and an optical information recording/reproducing apparatus adopt an optical system structure providing a higher proportion of optical components shared by the reference and signal beams optical path than conventional optical system structure. To increase the proportion of shared optical components, the signal beam and the reference beam pass through the PBS prism as parallel beams and a concave lens is placed on a reference beam path just before the objective lens. | 09-18-2008 |
20080239428 | NON-FT PLANE ANGULAR FILTERS - Non-Fourier Transform (FT) plane angular filters and their use in holographic storage systems or devices for angular filtering of a data beam prior to recording holographic data or for angular filtering of a recovered beam prior to detecting the recovered holographic data. The non-FT plane filters may be a macrotube array, an etalon, a multi-layer thin film interference coating on a curved surface, a lenslet array device, a waveguide-like array, or a combination thereof. Also provided are methods for carrying out angular filtering using such filters for data storage and/or data recovery. | 10-02-2008 |
20080259421 | METHODS FOR IMPLEMENTING PAGE BASED HOLOGRAPHIC ROM RECORDING AND READING - According to one aspect, methods and systems for recording and reading holographic storage media are provided. In one aspect, a method includes illuminating a data mask with a beam and recording a resulting modulated beam in a holographic storage medium, wherein the data mask includes an information layer that is divided into multiple data pages, and propagating a reference beam to the holographic storage medium to record the multiple data pages of the data mask in a parallel fashion on the holographic storage medium. | 10-23-2008 |
20090046334 | HROM REPLICATION METHODS, DEVICES OR SYSTEMS, ARTICLES USED IN SAME AND ARTICLES GENERATED BY SAME - HROM replication methods, devices or systems are disclosed herein. Also disclosed herein are articles comprising conical reference (reconstruction) beam hologram elements to generate conical or conical like reference (reconstruction) beams which may be used in such HROM replication methods, devices or systems. Further disclosed herein are articles comprising a target medium which may be used in such HROM replication methods, devices or systems. | 02-19-2009 |
20090080042 | MONOCULAR HOLOGRAPHIC DATA STORAGE SYSTEM ARCHITECTURE - A monocular holographic storage device or system to provide for compact recording and/or reading of data pages in a holographic storage medium. Also provided are methods for carrying out such data storage and/or data recovery using a monocular holographic storage device or system. Further provided are articles comprising holographic storage media for recording or for reading recorded data using such devices or systems. | 03-26-2009 |
20090092160 | EXTERNAL CAVITY LASER WITH A TUNABLE HOLOGRAPHIC ELEMENT - Embodiments of systems and methods are provided for a tunable laser device. The tunable laser device may include a tunable Bragg reflector that allows its wavelength to be tuned via temperature and/or pressure. This Bragg reflector may include holographic material in which a Bragg grating may be formed comprising parallel fringes of alternating index of refractions. Temperature and/or pressure changes may be effected in the Bragg reflector by, for example, a thermoelectric cooler and/or piezo transducer. | 04-09-2009 |
20100231998 | MONOCULAR HOLOGRAPHIC DATA STORAGE SYSTEM ARCHITECTURE - A monocular holographic storage device or system to provide for compact recording and/or reading of data pages in a holographic storage medium. Also provided are methods for carrying out such data storage and/or data recovery using a monocular holographic storage device or system. Further provided are articles including holographic storage media for recording or for reading recorded data using such devices or systems. | 09-16-2010 |
20120127548 | MONOCULAR HOLOGRAPHIC DATA STORAGE SYSTEM ARCHITECTURE - A monocular holographic storage device or system to provide for compact recording and/or reading of data pages in a holographic storage medium. Also provided are methods for carrying out such data storage and/or data recovery using a monocular holographic storage device or system. Further provided are articles comprising holographic storage media for recording or for reading recorded data using such devices or systems. | 05-24-2012 |
20120224237 | HOLOGRAPHIC RECORDING SYSTEM HAVING A RELAY SYSTEM - According to one aspect and example, a holographic recording system includes a light source, an object for modulating an object beam from the light source, and a relay system adapted to magnify (positive or negative) the modulated beam (e.g., an image of the object) to an output image. The object may include an SLM operable to modulate the object beam with an information layer comprising a plurality of data pages. The output image is directed to the holographic storage medium, where a reference beam is also directed, to record the resulting interference pattern. Additionally, the relay system converges the output image to an output Fourier plane, which may be disposed within the holographic storage medium. A filter may be placed at an intermediate Fourier plane located prior to the output Fourier plane, and a phase mask may be placed at the position of the output image. | 09-06-2012 |
20130176407 | Beam scanned display apparatus and method thereof - Generally, display systems may be employed in cinema and exhibition applications. Laser scanned display systems may be enabled such that the display systems may display three dimensional (ā3Dā) content. One example of a display system may include a diffusive screen which may be a transmissive diffuser and at least a light engine or an array of light engines, in which the light engine or array of light engines may include at least a light source, beam combining optics which may combine colors into at least one of a single beam or closely spaced beams, and at least a scanning system which may steer the beam to a desired location on the diffusive screen. | 07-11-2013 |