Search Patents
  • Decision feedback viterbi detector for page-access optical memories
    Patent number: 5740184
    Abstract: Signal processing methods for addressing intersymbol interference in page-access optical memories such as holographic or two photon systems are disclosed. The invention takes advantage of the cartesian arrangement of data in page-access optical memories. A detector using the Viterbi algorithm is used to decode data row by row. Decision feedback is used in the direction perpendicular to the Viterbi direction. The use of data from previously decoded rows allows a reduction in the complexity of the Viterbi detector.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: April 14, 1998
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: John F. Heanue, Korhan Gurkan, Lambertus Hesselink
  • Portable content container displaying A/V files in response to a command received from a consumer device
    Patent number: 8861941
    Abstract: A portable content container is disclosed comprising a decoder for decoding an A/V file into an A/V stream. File directory information identifying one or more A/V files is transmitted to a consumer device. A display command is received from the consumer device to display a selected one of the A/V files on a display device. The selected A/V file is decoded into an A/V stream transmitted to the display device in response to the display command. In an embodiment, the portable content container further comprises local memory for storing A/V files.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: October 14, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventor: Lambertus Hesselink
  • Program recording webification
    Patent number: 10382526
    Abstract: A method of providing a program recording to a user includes: accessing an application service provider that includes a program database via a first connection over a network with a user processor; selecting, with the user processor, a program recording to be received at the location of the user processor; providing the program recording selected with the user processor, at the location of the application service provider or a third location different from the location of the application service provider and the location of the user processor; and delivering the selected program recording to the location of the user processor.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: August 13, 2019
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Lambertus Hesselink, Dharmarus Rizal, Joep van Beurden, Eric S. Bjornson
  • Portable content container displaying A/V files in response to a command received from a consumer device
    Patent number: 8526798
    Abstract: A portable content container is disclosed comprising a decoder for decoding an A/V file into an A/V stream. File directory information identifying one or more A/V files is transmitted to a consumer device. A display command is received from the consumer device to display a selected one of the A/V files on a display device. The selected A/V file is decoded into an A/V stream transmitted to the display device in response to the display command. In an embodiment, the portable content container further comprises local memory for storing A/V files.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 3, 2013
    Assignee: Western Digital Technologies, Inc.
    Inventor: Lambertus Hesselink
  • Managed peer-to-peer applications, systems and methods for distributed data access and storage
    Publication number: 20050144186
    Abstract: Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Strategic cache management processes are provided to manage the data in cache memory of the storage devices involved. Communication of data over the network may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN. Data transmissions may be managed to minimize bandwidth and may be temporally and/or spatially compressed.
    Type: Application
    Filed: November 13, 2004
    Publication date: June 30, 2005
    Inventors: Lambertus Hesselink, Dharmarus Rizal, Eric Bjornson
  • Optical data storage by selective localized alteration of a format hologram
    Patent number: 6212148
    Abstract: Digital data bits are stored at storage locations at plural depths within a holographic storage medium as selective, localized alterations in a format hologram. Micro-localized regions of a reflection format hologram extending throughout the medium are deleted by focusing a high-power laser beam at desired storage locations. The deletion regions have a lower reflectivity than the surrounding parts of the format hologram. Tunable-focus storage and retrieval heads, as well as dynamic aberration compensators, are used for multi-depth access. Storage and retrieval may each be achieved with a single head.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: April 3, 2001
    Assignee: Siros Technologies, Inc.
    Inventors: Lambertus Hesselink, Robert R. McLeod, Sergei L. Sochava, William Phillips
  • Method and apparatus for optical data storage and/or retrieval by selective alteration of a holographic storage medium
    Patent number: 6310850
    Abstract: An apparatus and method for optical data storage and/or retrieval using an optical data storage medium having a spatially-modulated refractive index that can be altered locally with optical methods. Data can be written at a plurality of depths throughout the volume of the medium using a write beam and relatively simple and inexpensive optical components. The write beam stores data locally by physical distortion of the medium at discrete storage locations. The alterations can be detected as variations in the reflectivity of the storage locations using a retrieval beam.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: October 30, 2001
    Assignee: Siros Technologies, Inc.
    Inventors: Sergei Sochava, Sergei Orlov, Tokuyuki Honda, Brian H. Cumpston, Lambertus Hesselink
  • Focusing and imaging compatible objective lenses for pixel-based and/or bit-based optical data recording and retrieval
    Publication number: 20090225644
    Abstract: A low cost and lightweight interchangeable lens system is provided. The lens system includes two aspheric elements that is usable both for page-based and bit-based data storage systems. The lens system has a large field of view up to ±50 degrees and a high numerical aperture up to 0.8. The invention reduces cost and weight of the objective lenses and is usable with the servoing technology. The invention provides a long working distance of 20% of the focal length and provides sufficient physical space to accommodate media and aberration corrections, which enable a media interchangeable and compatible system among the both optical recording formats.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 10, 2009
    Inventors: Yuzuru Takashima, Lambertus Hesselink
  • Managed peer-to-peer applications, systems and methods for distributed data access and storage
    Patent number: 7587467
    Abstract: Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Strategic cache management processes are provided to manage the data in cache memory of the storage devices involved. Communication of data over the network may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN. Data transmissions may be managed to minimize bandwidth and may be temporally and/or spatially compressed.
    Type: Grant
    Filed: November 13, 2004
    Date of Patent: September 8, 2009
    Assignee: Western Digital Technologies, Inc.
    Inventors: Lambertus Hesselink, Dharmarus Rizal, Eric S. Bjornson
  • Enhanced surface plasmon resonance sensor using Goos-Hanchen effect
    Publication number: 20070159633
    Abstract: An improved surface plasmon resonance (SPR) sensor is provided based on direct measurement of the Goos-Hänchen effect. Sensor sensitivity is enhanced by selecting the thickness of the metallic layer of the SPR sensor to be close to a critical thickness dcr where the effect of the surface plasmon resonance on the Goos-Hänchen shift is most pronounced. Overall sensor sensitivity is surprisingly found to improve with this approach, even though the measurement is based on a second order effect (i.e., the Goos-Hänchen shift) instead of the first order reflectance change measured in conventional SPR sensor approaches. The invention is also applicable to sensors based on measurements of other non-specular reflection parameters, such as temporal shifts, frequency shifts, and/or angular shifts.
    Type: Application
    Filed: June 30, 2006
    Publication date: July 12, 2007
    Inventors: Xiaobo Yin, Lambertus Hesselink
  • METHODS AND SYSTEMS FOR A PORTABLE DATA LOCKER
    Publication number: 20190014122
    Abstract: The embodiments provide for binding files to an external drive, a secured external drive, or portable data locker. The files are bound in order to help restrict or to prevent access and modification by certain computers or users. Computers or users that are authorized or within the authorized domain are permitted full access. The files stored on the external drive may be bound in various ways. The files may be encapsulated in a wrapper that restricts the use and access to these files. The bound files may require execution of a specific application, plug-in, or extension. A computer may thus be required to execute program code that limits the use of the secured files. In one embodiment, the external drive provides the required program code to the computer. In other embodiments, the required program code may be downloaded from a network or provided by an external authority.
    Type: Application
    Filed: July 20, 2018
    Publication date: January 10, 2019
    Inventors: Lambertus Hesselink, Rajesh K. Batra
  • Secure Control System for Multistage Thermo Acoustic Micro-CHP Generator
    Publication number: 20160146153
    Abstract: A method of controlling facility power requirements using a thermoacoustic power device is provided that includes determining energy assets in a facility, controlling the energy assets using an appropriately programmed controller across a network having a security system protocol, monitoring outside temperatures and weather, measuring usage of the energy assets using a temperature sensor or an electrical usage sensor to a load-response signal of an on/off operation and usage of the energy assets to identify a specific energy asset by the controller to determine aggregate energy needs of the energy assets, and using a thermoacoustic power device controlled by the controller to generate electricity and heat according to the monitored temperature, weather and energy assets.
    Type: Application
    Filed: November 24, 2015
    Publication date: May 26, 2016
    Inventors: Lambertus Hesselink, Geoffrey A. Bruder, Mark A. Pickens, Rajesh Batra, Neil W. Troy, Rodger W. Dyson, JR.
  • Single X-ray Grating X-ray Differential Phase Contrast Imaging System
    Publication number: 20170307549
    Abstract: Single X-ray grating differential phase contrast (DPC) X-ray imaging is provided by replacing the conventional X-ray source with a photo-emitter X-ray source array (PeXSA), and by replacing the conventional X-ray detector with a photonic-channeled X-ray detector array (PcXDA). These substitutions allow for the elimination of the G0 and G2 amplitude X-ray gratings used in conventional DPC X-ray imaging. Equivalent spatial patterns are formed optically in the PeXSA and the PcXDA. The result is DPC imaging that only has a single X-ray grating (i.e., the G1 X-ray phase grating).
    Type: Application
    Filed: June 30, 2017
    Publication date: October 26, 2017
    Inventors: Lambertus Hesselink, Max Yuen, Yao-Te Cheng, Yuzuru Takashima
  • METHODS AND SYSTEMS FOR A PORTABLE DATA LOCKER
    Publication number: 20160065587
    Abstract: The embodiments provide for binding files to an external drive, a secured external drive, or portable data locker. The files are bound in order to help restrict or to prevent access and modification by certain computers or users. Computers or users that are authorized or within the authorized domain are permitted full access. The files stored on the external drive may be bound in various ways. The files may be encapsulated in a wrapper that restricts the use and access to these files. The bound files may require execution of a specific application, plug-in, or extension. A computer may thus be required to execute program code that limits the use of the secured files. In one embodiment, the external drive provides the required program code to the computer. In other embodiments, the required program code may be downloaded from a network or provided by an external authority.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 3, 2016
    Inventors: Lambertus Hesselink, Rajesh K. Batra
  • METHOD AND SYSTEM FOR OPTIMIZING DEVICE SHAPE
    Publication number: 20230376650
    Abstract: A method includes receiving/processing a device geometry data for a device based on a boundary element method (BEM) to generate a surface physics solution and further to generate a first intermediate data; applying additional underlying physics rule to the generated surface solution and generating a second intermediate data; evaluating performance of the device based on the applying; generating a gradient between the evaluated performance of the device and a desired performance; storing the intermediate data in a memory component; applying the additional underlying physics rule to the generated gradient and to the second intermediate data to generate a gradient of the parameters of the physics rules; processing the gradient of the parameters of the physics rules based on the BEM and the first intermediate data to generate a gradient of the generated surface solution; and updating the device geometry data based on the gradient of the generated surface boundary.
    Type: Application
    Filed: May 19, 2023
    Publication date: November 23, 2023
    Inventors: Lambertus Hesselink, Lars Thorben Neustock
  • Spatio-angular multiplexing geometry for volume holographic storage
    Patent number: 5844700
    Abstract: Partially overlapping holograms are stored in a cylindrical volume holographic storage medium capable of rotation about and translation along its longitudinal axis. The reference and signal beams are mutually perpendicular, and each is perpendicular to the longitudinal axis. An index-matched housing encloses the medium laterally. An optional helically-varying optical axis (c-axis) orientation allows recording at constant angular intervals over a full revolution. Signals from stored pages are used to dynamically adjust the positioning of the medium relative to the light beams as the medium continuously spins at high velocity, and to control the access of the signal beam to the readout camera.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: December 1, 1998
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Muthuveerappan Jeganathan, Matthew C. Bashaw, Lambertus Hesselink
  • Optical data storage by selective localized alteration of a format hologram in a holographic storage disk
    Patent number: 6614741
    Abstract: Digital data bits are stored at storage locations at plural depths within a holographic medium of a holographic storage disk in the form of selective, localized alterations in a format hologram. Micro-localized regions of a reflection format hologram extending throughout the medium are deleted by focusing a high-power laser beam at desired storage locations. The deletion regions have a lower reflectivity than the surrounding parts of the format hologram. Tunable-focus storage and retrieval heads, as well as dynamic aberration compensators, are used for multi-depth access. Storage and retrieval may each be achieved with a single head.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: September 2, 2003
    Assignee: Research Investment Network, Inc.
    Inventors: Lambertus Hesselink, Robert R. McLeod, Sergei L. Sochava
  • MANAGED PEER-TO-PEER APPLICATIONS, SYSTEMS AND METHODS FOR DISTRIBUTED DATA ACCESS AND STORAGE
    Publication number: 20160261680
    Abstract: Secure and remote operation of a remote computer from a local computer over a network includes authenticating a remote computer for connection to a computer over the network and/or a local computer for connection to a remote computer over the network; establishing a secure connection therebetween; and integrating a desktop of a remote computer on a display of a local computer. Functions that are performed may include one or more of: integrating a file structure of accessible files accessed at the second or first computer, into a file structure contained at the first or second computer, respectively; at least one of integrating a desktop of the second computer on a display of the first computer and integrating a desktop of the first computer on a display of the second computer; and directly operating the second computer from the first computer or the first computer from the second computer.
    Type: Application
    Filed: May 17, 2016
    Publication date: September 8, 2016
    Inventors: LAMBERTUS HESSELINK, DHARMARUS RIZAL, ERIC S. BJORNSON
  • Managed peer-to-peer applications, systems and methods for distributed data access and storage
    Patent number: 8688797
    Abstract: Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Communication of data over one or more networks may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN. In any case, file structure integrating means are configured to integrate a file structure of accessible files accessed at a second or first computer, into a file structure contained at the first or second computer, respectively.
    Type: Grant
    Filed: November 13, 2004
    Date of Patent: April 1, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventors: Lambertus Hesselink, Dharmarus Rizal, Eric S. Bjornson
  • MANAGED PEER-TO-PEER APPLICATIONS, SYSTEMS AND METHODS FOR DISTRIBUTED DATA ACCESS AND STORAGE
    Publication number: 20180234484
    Abstract: Secure and remote operation of a remote computer from a local computer over a network includes authenticating a remote computer for connection to a computer over the network and/or a local computer for connection to a remote computer over the network; establishing a secure connection therebetween; and integrating a desktop of a remote computer on a display of a local computer. Functions that are performed may include one or more of: integrating a file structure of accessible files accessed at the second or first computer, into a file structure contained at the first or second computer, respectively; at least one of integrating a desktop of the second computer on a display of the first computer and integrating a desktop of the first computer on a display of the second computer; and directly operating the second computer from the first computer or the first computer from the second computer.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 16, 2018
    Inventors: LAMBERTUS HESSELINK, DHARMARUS RIZAL, ERIC S. BJORNSON
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