Patents by Inventor Bobin Varghese

Bobin Varghese has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12050329
    Abstract: A device (200) is proposed comprising a first part (101) of a first material having a first refractive index n1 and a second part (102) of a second material having a second refractive index n2 higher than n1. Such device further comprises at least one contact area (110) in between the first and second parts, radiating an outgoing electromagnetic wave (100o) when the device is illuminated by an incoming electromagnetic wave (100i). A projection of the at least one contact area along a direction of propagation of the incoming electromagnetic wave has a non-vanishing height lower than 1.2 times a critical height equal to a wavelength in vacuum of the incoming electromagnetic wave divided by the difference between the second refractive index n2 and the first refractive index n1.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: July 30, 2024
    Assignee: InterDigital CE Patent Holdings
    Inventors: Laurent Blonde, Mitra Damghanian, Valter Drazic, Bobin Varghese
  • Publication number: 20240094537
    Abstract: In example embodiments, a waveguide display apparatus includes a waveguide comprising a substrate, a plurality of diffractive grating elements on the waveguide, and at least two coating layers on the waveguide between the substrate and the diffractive grating elements. The grating elements may be elements of a diffractive in-coupler. Some embodiments include three coating layers, with a middle layer having a refractive index greater than that of the substrate, the middle layer being between two layers having a refractive index lower than that of the substrate. Some embodiments further include a fourth coating layer.
    Type: Application
    Filed: January 20, 2022
    Publication date: March 21, 2024
    Inventors: Valter Drazic, Oksana Shramkova, Bobin Varghese, Valerie Allie
  • Publication number: 20230290796
    Abstract: In example embodiments, an optical component includes a dielectric structure having a substantially rectangular cross-section with an upper surface and a lower surface. A first electrically conducting layer is provided on the upper surface, where the first electrically conducting layer has a first opening positioned to accept incoming electromagnetic radiation. The second electrically conducting layer has a second opening positioned to emit electromagnetic radiation, e.g. toward a CMOS sensor pixel in a silicon substrate. The dimensions of the optical component are configured to provide constructive interference for incident radiation of a selected wavelength.
    Type: Application
    Filed: July 22, 2021
    Publication date: September 14, 2023
    Inventors: Bobin Varghese, Oksana Shramkova, Laurent Blonde, Valter Drazic
  • Publication number: 20220043192
    Abstract: A device (200) is proposed comprising a first part (101) of a first material having a first refractive index n1 and a second part (102) of a second material having a second refractive index n2 higher than n1. Such device further comprises at least one contact area (110) in between the first and second parts, radiating an outgoing electromagnetic wave (100o) when the device is illuminated by an incoming electromagnetic wave (100i). A projection of the at least one contact area along a direction of propagation of the incoming electromagnetic wave has a non-vanishing height lower than 1.2 times a critical height equal to a wavelength in vacuum of the incoming electromagnetic wave divided by the difference between the second refractive index n2 and the first refractive index n1.
    Type: Application
    Filed: September 27, 2019
    Publication date: February 10, 2022
    Inventors: Laurent Blonde, Mitra Damghanian, Valter Drazic, Bobin Varghese