US Patent Application 17825486. SUPERIMPOSED DIFFRACTIVE GRATINGS FOR OPTICAL ELEMENTS OF AUGMENTED REALITY AND VIRTUAL REALITY DISPLAYS simplified abstract

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SUPERIMPOSED DIFFRACTIVE GRATINGS FOR OPTICAL ELEMENTS OF AUGMENTED REALITY AND VIRTUAL REALITY DISPLAYS

Organization Name

Rovi Guides, Inc.

Inventor(s)

Yuval Ofir of Kfar Ha-Oranim (IL)

SUPERIMPOSED DIFFRACTIVE GRATINGS FOR OPTICAL ELEMENTS OF AUGMENTED REALITY AND VIRTUAL REALITY DISPLAYS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17825486 titled 'SUPERIMPOSED DIFFRACTIVE GRATINGS FOR OPTICAL ELEMENTS OF AUGMENTED REALITY AND VIRTUAL REALITY DISPLAYS

Simplified Explanation

The patent application describes head-mounted displays with waveguides that have superimposed diffractive gratings.

  • The head-mounted display includes an optical element and an image source that provides an image beam to the optical element.
  • The optical element consists of two gratings stacked on top of each other, with one of them being a buried diffractive grating.
  • The buried diffractive grating is made up of a high-refractive index material mixed with a low-refractive index material or non-solid pockets like gas, air, or vacuum.
  • Light that is diffracted by the first grating is further diffracted by the second grating without interacting with the surface of the optical element between diffractions.
  • This design allows for a more efficient and compact head-mounted display, providing a clear and immersive visual experience for the user.


Original Abstract Submitted

Head-mounted displays with waveguides comprising superimposed diffractive gratings and methods for fabricating said waveguides are described herein. In an embodiment, a head-mounted display comprises an optical element and an image source that provides an image beam to an optical element. The optical element comprises two gratings superimposed over each other, at least one of which comprising a buried diffractive grating. The buried diffractive grating comprises a high-refractive index material interspersed with a low-refractive index material or non-solid pockets, such as gas, air or vacuum. Light diffracted by a first of the two gratings is further diffracted by a second of the two gratings without interacting with a surface of the optical element between diffractions.

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