Patents by Inventor Krishnan Ramaswamy Parameswaran

Krishnan Ramaswamy Parameswaran 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).

  • Publication number: 20220057269
    Abstract: An infrared thermal camera can be installed in a vehicle, such as a car, to provide different capabilities including night vision, passenger temperature monitoring, liveness detection, and avoidance of collisions with animals. The camera may be located inside the vehicle facing outwards through the front windshield. The camera may be used in multiple modes. In a first mode, the camera may be used to provide night vision or other thermal imaging of a scene outside the vehicle using a first field of view. In a second mode, the camera may be used to provide thermal imaging of a scene at least partially inside the vehicle using a second field of view, which may be useful, for example, for scanning the skin temperatures of occupants.
    Type: Application
    Filed: August 16, 2021
    Publication date: February 24, 2022
    Inventors: Krishnan Ramaswamy Parameswaran, Harvey Weinberg
  • Publication number: 20210157162
    Abstract: In an optical element, diffractive focusing features and diffractive anti-reflection features can extend into a first surface of a body, such as by etching. The diffractive focusing features can have a same first depth that is greater than a wavelength, and can be located in a first area to have a duty cycle that varies over the first area. The diffractive anti-reflection features can have a same second depth that is less than the wavelength. In some examples, an effective refractive index of the diffractive focusing features and the diffractive anti-reflection features, together, can be less than or equal to a specified value, such as 120% of a square root of a refractive index of a material of the body. In other examples, the diffractive anti-reflection features can be located in the first area to have a duty cycle that is constant over the first area.
    Type: Application
    Filed: November 24, 2020
    Publication date: May 27, 2021
    Inventors: David Kryskowski, Krishnan Ramaswamy Parameswaran
  • Patent number: 10732265
    Abstract: An optical illuminator assembly such as an integrated module can provide an illumination source for use in applications such as optical detection. A peak output power of the module can be enhanced as compared to other approaches, such as by one or more of controlling parasitic effects along an electrical pathway used to drive an optical emitter circuit included as a portion of the module, or by providing thermal management including establishing thermal conduction pathways through opposite surfaces of an optical emitter circuit such as an integrated circuit die comprising a solid-state optical emitter. Control schemes can be used that power various cells or functional blocks of the optical emitter independently. Thermal regulation can be provided by an active heat transfer element such as a thermoelectric cooler (TEC). An optical illuminator assembly can be optically coupled to a beam-steering device or other elements, such as using a self-aligning mechanical configuration.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: August 4, 2020
    Assignee: Analog Devices, Inc.
    Inventors: Krishnan Ramaswamy Parameswaran, Xu Tang, Ying-Ju Wang, Weidong Wang, David Bolognia, Scott Robert Davis, Christophe Antoine, Brian Hall