Patents Assigned to HoloSpex, Inc.
  • Patent number: 10795314
    Abstract: Systems, methods, and devices are provided relating to far field hologram viewing devices. A method of designing and manufacturing a far field hologram is provided. Holographic light patterns with minimal spurious pixel errors in the hologram response may be produced without requiring a tight tolerance on the relative positions of the hologram and an observer's eye. Far field viewing devices, and methods for making the same, that employ multiple unit holograms each having differing noise characteristics that superpose in a way to reduce the effects of spurious pixel errors while maintaining good overall noise performance.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: October 6, 2020
    Assignee: Holospex, Inc.
    Inventor: Joseph van der Gracht
  • Patent number: 6452699
    Abstract: This invention pertains to the design of optimized far field viewing devices that simultaneously produce bright far field holographic light patterns and achieve good see-through performance to present a well focused scene. A far field transmission hologram recorded on a transparent substrate has regions having high diffraction efficiency juxtaposed with regions having low diffraction efficiency. The high diffraction efficiency regions contribute to production of bright far field holographic light patterns, whereas the low diffraction efficiency regions contribute to see-through performance.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: September 17, 2002
    Assignee: HoloSpex, Inc.
    Inventors: Ravindra A. Athale, Joseph van der Gracht
  • Patent number: RE39864
    Abstract: This invention pertains to the design of optimized far field viewing devices that simultaneously produce bright far field holographic light patterns and achieve good see-through performance to present a well focused scene. A far field transmission hologram recorded on a transparent substrate has regions having high diffraction efficiency juxtaposed with regions having low diffraction efficiency. The high diffraction efficiency regions contribute to production of bright far field holographic light patterns, whereas the low diffraction efficiency regions contribute to see-through performance.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: October 2, 2007
    Assignee: HoloSpex, Inc.
    Inventors: Ravindra A. Athale, Joseph van der Gracht