Abstract: A new type of FT lens is provided that improves phase conjugation in holographic data systems. This type of FT lens has a uniquely large isoplanatic patch. This enables relaxed assembly tolerances, asymmetric reader/writer architectures, and compensation for tilted plate aberrations in the media.

Abstract: Methods are disclosed for determining the layout of cure sites/cure spots and/or stack positions on the recordable section of a holographic storage medium. Also disclosed are methods for carrying out pre-curing and stack writing routines for pre-curing, in an appropriate order, bookcases comprising such cure spots in the recordable section, and for writing stacks of holograms, in an appropriate order, to such bookcases after determining such layouts.

Abstract: Described are holographic storage mediums and method of making holographic storage mediums. The holographic storage mediums may have write components that bind to the matrix to form a pattern in the media. The holographic storage mediums may also be rewriteable.

Abstract: 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.

Abstract: 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.

Abstract: A laser system comprising a laser assembly for generating a light beam, and collimation assembly movable axially with respect to the laser assembly and being positioned in the optical path of the light beam. The collimation assembly comprises a collimation lens group comprising a first lens component positioned within a first lens mounting cell, a second lens component positioned within a second lens mounting cell and provided with a central portion for receiving and cooperating with the first cell to thereby adjust the axial spacing between the first and second lens components, means for radially adjusting the position of the second cell with respect to the first cell to thereby radially adjust the optical axis of the second lens component with respect to the optical axis of the first lens component, and means formed in the central and flange portions of the second cell for creating flexure therein.

Abstract: 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.

Abstract: 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 memory for containing at least a portion of a directory of the data contained in the holographic media. By locating directory information for the holographic media in a supplemental memory, areas of the holographic media that have not yet been written to can be determined prior to accessing the holographic media. In this way, activating photo-sensitive agents in unwritten areas of the holographic media can be avoided unless these areas are being written to.

Abstract: Even when a tilt error is caused in a holographic memory in a direction perpendicular to a surface including optical axes of a signal beam and a reference beam, the signal beam and the reference beam are allowed to enter the holographic memory at adequate angles relative thereto at all times by suppression of the tilt error. During recording and reproducing operations, the reference incident angle of the reference beam in the radial tilt direction is detected based on a received light state. A tilt actuator for displacing the holographic memory medium in the radial tilt direction is driven to adjust an incident angle of the reference beam in the radial tilt direction to the reference angle Sr. Then, the signal beam and the reference beam are emitted to the holographic memory medium to execute the recording and reproducing operations.

Abstract: Aspects of the present invention are generally directed to a holographic system. Generally, aspects of the present invention are directed to allocating power of a light beam generated by a coherent light source among the various discrete light beams used in a holographic system. Specifically, a variable optical divider is incorporated into an optical steering subsystem of the holographic memory system to redirect the coherent light beam into one or more discrete light beams, and to dynamically allocate power of the coherent light beam among the discrete light beams.

Abstract: A holographic read only memory card which can be coupled to and read by a card reader to which electronic read only memory cards can also be coupled to and read by the card reader is disclosed. The holographic read only memory card comprises: a housing having a compartment for receiving a holographic storage medium; a holographic storage medium having stored thereon holographic data; and optionally a an electronics panel member having an electronic memory component which can be read by the card reader when the holographic read only memory card is coupled to the electronic card reader. The housing comprises one or more card locating members to thereby repeatedly position the holographic read only memory card each time the holographic read only memory card is coupled to the electronic card reader so that the holographic data can be read.

Abstract: A card connector which can interchangeably couple a holographic memory card or an electronic memory card to a card reader and/or writer which can then read and/or write to the coupled holographic memory card or electronic memory card. The card connector comprises: a memory card receiving section which can interchangeably receive the holographic memory card or the electronic memory card; and one or more card positioning members which cooperate with one or more card locating members on the coupled holographic memory card or the coupled electronic memory card to thereby repeatedly position the coupled holographic memory card or the coupled electronic memory card each time the holographic memory card or the electronic memory card is coupled to the card reader and/or writer, and is in a fully inserted card position, so that data can be read from and/or written to the coupled holographic memory card or the coupled electronic memory card.

Abstract: A data storage cartridge is described. The cartridge may include a housing having a top, a bottom, a front side, a back side, a first lateral side, and a second lateral side, said housing having a first media access aperture on the top of the housing; and a data storage medium contained within the housing, the data storage medium including a disk with a top and a bottom; wherein the front side of the housing contains a first segment of reduced thickness adjacent to the first media access aperture.

Abstract: The present invention relates to embodiments of: (1) a unitary holographic drive head assembly mounting structure; (2) an assembly comprising a unitary holographic drive head assembly mounting structure and a plurality of holographic drive head components and/or subassemblies; (3) a subassembly comprising a spatial light modulator, detector array, and a beam splitter; (4) a device comprising a spatial light modulator and a physical aperture positioned over or an imaged aperture projected onto the photoactive area of the spatial light modulator; (5) a system for optically aligning or pointing a laser in a holographic drive head assembly; (6) a light source subassembly comprising a laser, a fiber coupling lens; and an optical fiber having a fiber connector ready output end; and (7) a light source subsystem comprising a laser source, beam conditioning optics, fiber coupling optics for receiving the conditioned light beam, and a fiber optic connector for receiving the conditioned light beam from the fiber couplin

Abstract: The present invention provides a scanner comprising: a reflector component; means supporting the reflector component for pivoting with respect to the MCR to provide a scan which is stationary with respect to the OCR; means for enabling the support means to provide controlled pivoting of the reflector component; a magnet component which causes pivoting of the reflector component when actuated; and means for actuating the magnet component to thereby cause pivoting of the reflector component. Also provided is a scanner comprising a reflective prism for providing a circularized scanning beam, a prism carrier and magnet suspension assembly, and flexure means connected to the assembly to enable the prism to controllably pivot: (1) with respect to the MCR axis to provide a scan which is stationary with respect to the OCR; and (2) with respect to a pitch axis orthogonal to the MCR to provide an orthogonal scan.

Abstract: 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.

Abstract: Methods and systems for measuring and/or inspecting a characteristic of an optical article are provided. In one example, a method includes illuminating an optical article with a focused beam of light, detecting the light with a sensor after interacting with the optical article, determining a deflection angle of the beam of light, and determining a characteristic of the optical article based on the deflection angle. In one example, a system includes a light source, an optical element, and a sensor. The optical element focuses light from the light source to a reference location, the sensor detects the light from the reference location and generates signals associated with the intensity and position of the light received. A processor may receive the signals from the sensor and thereby determine a deflection angle of the light from the probe path.

Abstract: 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.

Abstract: The present invention provides systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format. The present invention also provides systems and methods for protecting data stored on data storage medium so that the data may be recovered without errors.

Abstract: The present invention provides systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format. The present invention also provides systems and methods for protecting data stored on data storage medium so that the data may be recovered without errors.