Patents by Inventor Francesco Aieta

Francesco Aieta 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: 10928677
    Abstract: A diffractive multiview backlight and a multiview display employ an array of diffractive multibeam elements including a plurality of diffraction gratings configured to provide a plurality of light beams having different principal angular directions corresponding to different view directions of the multiview display. The display includes multiview pixels that include sub-pixels. A size of the diffractive multibeam element of the array is comparable to a size of a sub-pixel in a multiview pixel of the multiview display.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 23, 2021
    Assignee: LEIA INC.
    Inventors: Francesco Aieta, David A. Fattal
  • Patent number: 10866426
    Abstract: An electronic device may have a light source such as a laser light source. The light source may emit light into a waveguide. A phase grating may diffract the light that is emitted into the waveguide to produce diffracted light. The diffracted light may be oriented parallel to a surface normal of an angled edge of the waveguide and parallel to a surface normal of a microelectromechanical systems mirror element in a two-dimensional scanning microelectromechanical systems mirror that is coupled to the edge of the waveguide. A wave plate may be interposed between the mirror and the edge of the waveguide to change the polarization state of light reflected from the mirror element relative to incoming diffracted light from the phase grating. The phase grating may be configured so that the reflected light is not diffracted by the phase grating.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: December 15, 2020
    Assignee: Apple Inc.
    Inventors: Eric J. Hansotte, Byron R. Cocilovo, Se Baek Oh, Seyedeh Mahsa Kamali, Francesco Aieta
  • Publication number: 20200386937
    Abstract: A static multiview display and method employ an array of diffraction gratings to provide a multiview image having a direction that is a function of both color and a propagation angle of a collimated guided light beam. The static multiview display includes a light guide configured to guide light in a longitudinal direction and a light source configured to provide the collimated guided light beam, the propagation angle within the light guide being determined by a longitudinal offset of an optical emitter of the light source. The static multiview display further includes the array of diffraction gratings are configured to scatter out a portion of the collimated guided light beam as a plurality of directional light beams representing the multiview image.
    Type: Application
    Filed: August 21, 2020
    Publication date: December 10, 2020
    Inventors: Xuejian Li, David A. Fattal, Francesco Aieta, Ming Ma
  • Patent number: 10830643
    Abstract: In one implementation, a spectral microscope may comprise a substrate with a planar lens, the planar lens including a phase profile including an axial focus and an oblique focus, a light source to excite a signal of a particle among a plurality of particles, and a detector to receive light generated from the light source from the axial focus of the planar lens and a spectral color component of the excited signal of the particle from the oblique focus of the planar lens.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: November 10, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Francesco Aieta, Charles M. Santori, Anita Rogacs
  • Publication number: 20200341182
    Abstract: A polarization recycling backlight and a multiview display employ a polarization-selective scattering feature configured to preferentially scatter out a first polarization component of guided light and a polarization conversion structure configured to convert a portion of a second polarization component of the guided light into the first polarization component. The polarization conversion structure includes a subwavelength grating.
    Type: Application
    Filed: July 12, 2020
    Publication date: October 29, 2020
    Inventors: Francesco Aieta, Xuejian Li, Thomas Hoekman, David A. Fattal
  • Patent number: 10816815
    Abstract: Multi-wavelength light is directed to an optic including a substrate and achromatic metasurface optical components deposited on a surface of the substrate. The achromatic metasurface optical components comprise a pattern of dielectric resonators. The dielectric resonators have distances between adjacent dielectric resonators; and each dielectric resonator has a width, w, that is distinct from the width of other dielectric resonators. A plurality of wavelengths of interest selected from the wavelengths of the multi-wavelength light are deflected with the achromatic metasurface optical components at a shared angle or to or from a focal point at a shared focal length.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 27, 2020
    Assignee: President and Fellows of Harvard College
    Inventors: Francesco Aieta, Mikhail Kats, Patrice Genevet, Federico Capasso, Mohammadreza Khorasaninejad
  • Publication number: 20200232924
    Abstract: Optical readers are disclosed in examples herein. An example optical reader including a light source to emit a light beam; and a spot pattern generator to receive the light beam and to generate a two-dimensional spot array from the light beam, the two-dimensional spot array to be directed toward a substrate having nanostructures, the two-dimensional spot array to be sensed to detect a presence or an absence of a substance of interest on the substrate.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Inventors: Charles M. SANTORI, James William STASIAK, Francesco AIETA, Anita ROGACS, Mineo YAMAKAWA, Kenneth WARD
  • Publication number: 20200218011
    Abstract: A grating-coupled light guide concentrates light and diffractively redirects the concentrated light at a non-zero propagation angle as guided light having a predetermined spread angle. The grating-coupled light guide includes a light guide, an optical concentrator, and a grating coupler. The optical concentrator is configured to concentrate light from a light source as concentrated light and the grating coupler is configured to diffractively redirect the concentrated light into the light guide as the guided light. Characteristics of the optical concentrator and grating coupler are configured in combination to determine the non-zero propagation angle and predetermined spread angle. A grating-coupled display system further includes an array of light valves configured to modulate emitted light as a displayed image.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 9, 2020
    Inventors: Xuejian Li, David A. Fattal, Francesco Aieta
  • Publication number: 20200192101
    Abstract: A device including a waveguide having a first waveguide surface and a second waveguide surface parallel to the first waveguide surface is disclosed. The device may include a first volume holographic light coupling element disposed between the first waveguide surface and the second waveguide surface. The first volume holographic light coupling element may be structured to reflect at least a portion of incident light as reflected light. Incident light for which the first volume holographic light coupling element is structured to reflect may have a first angle of incidence within a total internal reflection (TIR) range with respect a first axis corresponding to a surface normal of the waveguide. Incident light for which the first volume holographic light coupling element is structured to reflect may have a second angle of incidence with respect to a second axis different from the first axis.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Mark R. Ayres, Kenneth E. Anderson, Adam C. Urness, Friso Schlottau, Byron R. Cocilovo, Francesco Aieta
  • Publication number: 20200150489
    Abstract: A multiview backlight and a multiview display employ a microlens to adjust directional light beams to have directions corresponding to respective different view directions of the multiview display. The multiview backlight includes a light guide configured to guide light as guided light, a multibeam element configured to scatter from the light guide a portion of the guided light as a plurality of directional light beams, and the microlens configured to adjust directions of the directional light beams. The multiview display further includes a multiview pixel configured to modulate the plurality of directional light beams and provide a plurality of different views of the multiview display, the microlens being between the multibeam element and the multiview pixel.
    Type: Application
    Filed: January 14, 2020
    Publication date: May 14, 2020
    Inventors: Ming Ma, David A. Fattal, Francesco Aieta
  • Publication number: 20200116641
    Abstract: In an example, an apparatus is described that includes a light source, a holographic optical element, a sampling apparatus, and a detector. The light source is configured to emit a beam of excitation light. The holographic optical element is arranged to convert the beam of excitation light into a plurality of beams of excitation light. The sampling apparatus is arranged to project the plurality of beams of excitation light onto a surface outside the apparatus as a two-dimensional pattern of projection points. The sampling apparatus is further arranged to collect scattered radiation emitted by the surface in response to the two-dimensional pattern of projection points. The detector detects a frequency shift in the scattered radiation.
    Type: Application
    Filed: December 11, 2019
    Publication date: April 16, 2020
    Inventors: Francesco Aieta, Anita Rogacs, Viktor Shkolnikov
  • Patent number: 10620126
    Abstract: Optical readers are disclosed in examples herein. An example optical reader including a light source to emit a light beam; and a spot pattern generator to receive the light beam and to generate a two-dimensional spot array from the light beam, the two-dimensional spot array to be directed toward a substrate having nanostructures, the two-dimensional spot array to be sensed to detect a presence or an absence of a substance of interest on the substrate.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: April 14, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Charles M Santori, James William Stasiak, Francesco Aieta, Anita Rogacs, Mineo Yamakawa, Kenneth Ward
  • Patent number: 10613376
    Abstract: Examples disclosed herein include an augmented reality (AR) see-through display system, which includes a diffractive backlight substrate including diffractive gratings. The display system includes a light source to transmit light into the backlight substrate, wherein the diffractive gratings scatter the light out of the backlight substrate to form an array of directional pixels. The display system includes an LCD panel to modulate the array of directional pixels to form an image that augments a real world view visible through the backlight substrate and the LCD panel.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: April 7, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Francesco Aieta
  • Publication number: 20200096771
    Abstract: An electronic device may include a display that produce images. The display may generate light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide that propagates the light in a first direction towards the output coupler. The output coupler may couple the light out of the waveguide towards the eye box while inverting a parity of the light about the first direction. The coupler may include a first element such as a set of partial mirrors or diffractive gratings that redirects a first portion of the light in a second direction. The coupler may include a second element that redirects a second portion of the light in a third direction opposite the second direction. The first element may redirect the second portion and the second element may redirect the first portion towards the eye box.
    Type: Application
    Filed: August 13, 2019
    Publication date: March 26, 2020
    Inventors: Se Baek Oh, Bradley C. Steele, Byron R. Cocilovo, Francesco Aieta, Graham B. Myhre
  • Publication number: 20200089014
    Abstract: An electronic device may have a display that emits image light, a waveguide, and an input coupler that couples the image light into the waveguide. Beam splitter structures may be embedded within the waveguide. The beam splitter structures may partially reflect the image light multiple times and may serve to generate replicated beams of light that are coupled out of the waveguide by an output coupler. The beam splitter structures may replicate the beams across two dimensions to provide an eye box with uniform-intensity light from the display across its area. The beam splitter structures may include stacked partially reflective beam splitter layers, sandwiched transparent substrate layers having different indices of refraction, a thick volume hologram interposed between substrate layers, or combinations of these or other structures. The reflectivity of the beam splitter structures may vary discretely or continuously across the lateral area of the waveguide.
    Type: Application
    Filed: August 20, 2019
    Publication date: March 19, 2020
    Inventors: Guolin Peng, Eric J. Hansotte, Francesco Aieta, Graham B. Myhre, Hyungryul Choi, Nan Zhu, Paul J. Gelsinger-Austin, Se Baek Oh, Scott M. DeLapp, Bradley C. Steele
  • Publication number: 20200049996
    Abstract: An electronic device may have a display that provides image light to a waveguide. First and second liquid crystal lenses may be mounted to opposing surfaces of the waveguide. An coupler may couple the image light out of the waveguide through the first lens. The second lens may convey world light to the first lens. Control circuitry may control the first lens to apply a first optical power to the image light and the world light and may control the second lens to apply a second optical power to the world light that cancels out the first optical power. Each lens may include two layers of liquid crystal molecules having antiparallel pretilt angles. The pretilt angles and rubbing directions of the first lens may be antiparallel to corresponding pretilt angles and rubbing directions of the second lens about the waveguide.
    Type: Application
    Filed: July 24, 2019
    Publication date: February 13, 2020
    Inventors: Jin Yan, Young Cheol Yang, Igor Stamenov, Scott M. DeLapp, Francesco Aieta, Bradley C. Steele, Enkhamgalan Dorjgotov, Se Baek Oh
  • Publication number: 20200033619
    Abstract: A multilayer static multiview display and method of multilayer multiview display operation provide a plurality of multiview images using diffractive scattering of light from guided light beams having different radial directions. The static multiview display includes a first multiview display layer configured to emit directional light beams representing a first multiview image by diffractive scattering light from a radial pattern of guided light beams within the first multiview display layer. The static multiview display further includes a second multiview display layer configured to emit directional light beams representing a second static multiview image by diffractive scattering light from a radial pattern of guided light beams within the second multiview display layer. The provided plurality of multiview images may include a composite color multiview image, a static multiview image, or an animated or quasi-static multiview image.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 30, 2020
    Inventors: David A. Fattal, Xuejian Li, Francesco Aieta
  • Publication number: 20200033193
    Abstract: In one implementation, a spectral microscope may comprise a substrate with a planar lens, the planar lens including a phase profile including an axial focus and an oblique focus, a light source to excite a signal of a particle among a plurality of particles, and a detector to receive light generated from the light source from the axial focus of the planar lens and a spectral color component of the excited signal of the particle from the oblique focus of the planar lens.
    Type: Application
    Filed: October 3, 2019
    Publication date: January 30, 2020
    Inventors: Francesco Aieta, Charles M. Santori, Anita Rogacs
  • Publication number: 20200033526
    Abstract: A unilateral backlight and a unilateral multiview display employ an array of unilateral diffractive elements configured to provide directional light beams having a unilateral direction. A unilateral diffractive element of the unilateral diffractive element array comprises a slanted diffraction grating configured to provide a directional light beam by diffractive scattering of light guided in a light guide. The unilateral multiview display further includes light valves configured to modulate a plurality of directional light beams as multiview image having the unilateral direction.
    Type: Application
    Filed: September 26, 2019
    Publication date: January 30, 2020
    Inventors: David A. Fattal, Francesco Aieta
  • Patent number: 10527552
    Abstract: In an example, an apparatus is described that includes a light source, a holographic optical element, a sampling apparatus, and a detector. The light source is configured to emit a beam of excitation light. The holographic optical element is arranged to convert the beam of excitation light into a plurality of beams of excitation light. The sampling apparatus is arranged to project the plurality of beams of excitation light onto a surface outside the apparatus as a two-dimensional pattern of projection points. The sampling apparatus is further arranged to collect scattered radiation emitted by the surface in response to the two-dimensional pattern of projection points. The detector detects a frequency shift in the scattered radiation.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 7, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Francesco Aieta, Anita Rogacs, Viktor Shkolnikov