Patents Examined by Jie Lei
  • Patent number: 11686994
    Abstract: A method for driving an acousto-optic element with an acousto-optic crystal and a piezoelectric transducer for setting the acousto-optic crystal in mechanical vibration includes driving the piezoelectric transducer with a drive signal with at least one drive frequency. The at least one drive frequency in alternation takes on a plurality of different values around a center frequency during a passage of a mechanical vibrational wave through the acousto-optic crystal, such that a grating that is produced owing to density fluctuations in the acousto-optic crystal exhibits different grating spacings at the same time.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: June 27, 2023
    Inventor: Bernd Widzgowski
  • Patent number: 11684254
    Abstract: An OCT system for measuring a retina as part of an eye health monitoring and diagnosis system. The OCT system includes an OCT interferometer, where the interferometer comprises a light source or measurement beam and a scanner for moving the beam on the retina of a patient's eye, and a processor configured to execute instructions to cause the scanner to move the measurement beam on the retina in a scan pattern. The scan pattern is a continuous pattern that includes a plurality of lobes. The measurement beam may be caused to move on the retina by the motion of a mirror that intercepts and redirects the measurement beam. The mirror position may be altered by the application of a drive signal to one or more actuators that respond to the drive signal by rotating the mirror about an axis or axes.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: June 27, 2023
    Assignee: ACUCELA INC.
    Inventors: Ryo Kubota, Stephan Wyder, Philip M. Buscemi, Matthias Pfister, Alexander Holzer
  • Patent number: 11686898
    Abstract: A privacy display provides a private image exclusively visible within a viewing cone of a viewbox. The privacy display includes a light guide to guide light, a diffraction grating configured to diffractively couple out a portion of the guided light as diffractively coupled-out light and to direct the diffractively coupled-out light into the viewbox, and a light valve array configured to modulate the diffractively coupled-out light to provide the private image. An extent of the viewbox is determined by a collimation factor of the guided light. A dual-mode privacy display system further includes a broad-angle backlight configured to provide broad-angle light to separately provide a public image visible both inside and outside the viewing cone. The private image may be provided in a privacy mode and the public image may be provided in a public mode of the dual-mode privacy display system.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: June 27, 2023
    Assignee: LEIA INC.
    Inventor: David A. Fattal
  • Patent number: 11681169
    Abstract: Aspects and examples are directed to programmable optical finite impulse response filters and optical infinite impulse response filters, which may be implemented as photonic integrated circuits.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: June 20, 2023
    Inventors: Gary M. Graceffo, Andrew Kowalevicz, Benjamin P. Dolgin
  • Patent number: 11675057
    Abstract: A beam scanning apparatus includes a light source configured to emit light, and a reflective phased array device configured to reflect the light emitted from the light source and incident on the reflective phased array device, and electrically adjust a reflection angle of the reflected light reflected by the reflective phased array device, wherein the light source and the reflective phased array device are disposed such the light is incident on the reflective phased array device at an incidence angle with respect to a normal of a reflective surface of the reflective phased array device.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: June 13, 2023
    Inventors: Junghyun Park, Jungwoo Kim, Byunggil Jeong, Changgyun Shin, Byounglyong Choi
  • Patent number: 11662597
    Abstract: In described examples, a system (e.g., a projection system) can include a diffractive optical element adapted to be illuminated by at least one coherent light beam. A lens array is coupled to receive a diffracted beam of light from the diffractive optical element. The lens array includes a first and a second array lens. The first array lens is coupled to receive a first sector of a pattern of illumination of the diffracted beam of light, and the second array lens is coupled to receive a second sector of the pattern of illumination of the diffracted beam of light. A spatial light modulator is coupled to receive overlapping diffracted beams of light from the first and second array lenses to form an image beam.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: May 30, 2023
    Inventor: Terry Alan Bartlett
  • Patent number: 11660031
    Abstract: A method is disclosed for testing hearing in infants based on pupil dilation response. It does not require sedation or depend on subjective judgments of human testers. Pupil dilation response to sound is measured by presenting on a display a visually engaging video containing periodic changes; presenting sounds synchronized with the periodic changes of the video; recording images from a camera directed in front of the display, where the camera is sensitive to infrared wavelengths; processing the images to measure pupil sizes; and processing the measured pupil sizes to determine, statistically, the presence of a pupil dilation response to the sounds.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: May 30, 2023
    Assignee: University of Oregon
    Inventors: Avinash Deep Bala Singh, Terry Takeshi Takahashi
  • Patent number: 11644693
    Abstract: Techniques for providing wearable electronic devices with electrical components are disclosed. The electrical components can provide electrical technology to eyewear to facilitate audio support including enhanced hearing. The electrical components can operate independently or together with other electrical components provided elsewhere. The wearable electronic devices with electronic components can, for example, provide audio output, audio enhancements, or event-related audio content.
    Type: Grant
    Filed: July 25, 2022
    Date of Patent: May 9, 2023
    Assignee: IngenioSpec, LLC
    Inventors: Thomas A. Howell, David Chao, C. Douglass Thomas, Peter P. Tong
  • Patent number: 11644681
    Abstract: A semiconductor laser shaping device includes, along the light path of a semiconductor laser, a fast axis collimating lens, slow axis collimating lens, the half wave plate, a polarization beam combining prism, and a crawling prism group. The laser emitted by the semiconductor laser is collimated by a fast-axis collimating lens and then by a slow-axis collimating lens, and subsequently injected into a half wave plate and polarization beam combining prism, which compresses its spot size along the slow axis while keeping the spot size unchanged along the fast axis. The laser beam then passes through the crawling prism group, which shifts a portion of the light in the slow-axis direction to the fast-axis direction, which again compresses the light beam in the slow-axis direction. The device can reduce the beam size of a semiconductor laser in the slow-axis direction, reducing its beam parameter product and improving beam quality.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: May 9, 2023
    Assignee: Fujian Hitronics Technologies, Inc.
    Inventors: Shaofeng Zhang, Guanglei Ding, Jianyang Yang, Haocheng Hu, Huaping Zhang, Yawei Yan, Renliang Wan
  • Patent number: 11635639
    Abstract: Spectacles including auricular devices are described. The spectacles include a structure having a front frame for supporting respective lenses, and a pair of arms articulated to the front frame on laterally opposite sides, each of the arms extending longitudinally between a first end that is articulated to the front frame and a second, opposite end, close to which an end arm portion can make contact with the head at the ear. Each arm extends from the second end into an arm portion that is made of flexible material and bears an element for supporting an auricular device, and the arm portion can move, on account of its flexibility, between an operating position in which the support element is worn at the ear to allow the auricular device to be positioned, and a non-operating position in which the support element is removably held on the end arm portion.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: April 25, 2023
    Inventors: Nicola Belli, Giorgio Manera
  • Patent number: 11630246
    Abstract: A diffusion lens includes a concave first lens surface, a convex second lens surface such that part of light incident on the first lens surface is output from the second lens surface, a side surface extending from a periphery of the second lens surface in a vertical direction of the diffusion lens such that part of the rest of the light incident on the first lens surface is output from the side surface, and a bottom surface extending from a periphery of the first lens surface in a horizontal direction of the diffusion lens to meet a periphery of the side surface. Rates of change of the first and second lens surfaces have the same sign. A pattern is formed on the side surface and the bottom surface to diffuse the light through the side surface and diffuse the light reflected by the bottom surface.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: April 18, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seungjae Lee, Yonghun Kwon, Chunsoon Park, Keunbum Lee, Sungho Jun
  • Patent number: 11619823
    Abstract: An optical system for displaying a magnified virtual image of an image emitted by a display to a viewer. The optical system includes first and second lenses facing each other and spaced apart by an air gap to define an optical cavity therebetween. The optical cavity includes a reflective polarizer disposed on a major surface of the first lens, and an optical stack disposed on a major surface of the second lens. The optical stack includes an absorbing polarizer, a first retarder layer, a partial reflector, and a second retarder layer disposed between the absorbing polarizer and the partial reflector. The first and/or second lenses is/are birefringent lens provided outside the optical cavity to control polarization.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 4, 2023
    Inventors: John D. Le, Zhisheng Yun
  • Patent number: 11614643
    Abstract: A reflective spatial light modulator (SLM) made of an electro-optic material in a one-sided Fabry-Perot resonator can provide phase and/or amplitude modulation with fine spatial resolution at speeds over a Gigahertz. The light is confined laterally within the electro-optic material/resonator layer stack with microlenses, index perturbations, or by patterning the layer stack into a two-dimensional (2D) array of vertically oriented micropillars. Alternatively, a photonic crystal guided mode resonator can vertically and laterally confine the resonant mode. In phase-only modulation mode, each SLM pixel can produce a ? phase shift under a bias voltage below 10 V, while maintaining nearly constant reflection amplitude. This high-speed SLM can be used in a wide range of new applications, from fully tunable metasurfaces to optical computing accelerators, high-speed interconnects, true 2D phased array beam steering, beam forming, or quantum computing with cold atom arrays.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: March 28, 2023
    Assignee: Massachusetts Institute of Technology
    Inventors: Cheng Peng, Christopher Louis Panuski, Ryan Hamerly, Dirk Robert Englund
  • Patent number: 11609364
    Abstract: The present invention provides a thin optical laminated sheet with little or no interference fringes or rainbow-like colors, and a method of manufacturing the optical laminated sheet. An optical laminated sheet is integrally formed by laminating a plurality of optical films having an adhesive layer interposed therebetween, the optical laminated sheet including an adhesive layer A wherein one surface is a flat and smooth surface and the opposite surface has an unevenness shaped by a transfer. The optical laminated sheet may include an integrally formed laminate wherein one surface of the adhesive layer A is planarly bonded to one surface of the optical film and an uneven surface that is the other surface of the adhesive layer A is linearly and/or intermittently bonded to the prism edges of a light collecting film made up of prism rows. The optical laminated sheet may be used in a backlight unit.
    Type: Grant
    Filed: April 1, 2017
    Date of Patent: March 21, 2023
    Assignee: SUNTECHOPT CO., LTD.
    Inventor: Yuki Matsubara
  • Patent number: 11604064
    Abstract: A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces; the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces; and the optical multilayer film is disposed between the third and fifth surfaces. A second light beam enters the first prism through the first surface and exits by the second surface. The first light beam exits the lens assembly and enters the second prism through the eighth surface, and exits the first prism by the second surface. The lens assembly and the prism assembly satisfy: 0.80%?E1/E0?0.95%; wherein E0 is an energy of the first light beam emitted from the display and E1 is an energy of the first light beam passes through the lens assembly.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: March 14, 2023
    Inventors: Fang-Li Ma, Yue-Ye Chen, Bin Liu, Jun-Wei Che, We-Jie Lou, Hua-Tang Liu
  • Patent number: 11598969
    Abstract: A method of bonding layers of dielectric materials includes providing a surface one of the layers with microscale- and/or nanoscale-size bonding elements forming contact points of the layers and bringing a layer of the layers into a mutual position according to an intended use. The method also includes illuminating the layer whose surface is provided with bonding elements by an incident electromagnetic wave, the propagation direction of which is substantially orthogonal to the one of the layers, and whose wavelength is selected depending on an absorption spectrum of a material forming the one of the layers and generating condensed optical beams within said bonding elements or close to a tip of said bonding elements intended to be in contact with the other layer. The method further includes heating and melting the bonding elements by high-intensity focal spots formed by said generated optical beams and maintaining the layers into a mutual position until and bonding of the layers.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: March 7, 2023
    Assignee: Thomson Licensing
    Inventors: Artem Boriskin, Ray Keating, Justin Cunningham
  • Patent number: 11598980
    Abstract: Optical devices and their fabrication from thin film lithium niobate are provided. In some embodiments, an optical device includes a substrate and an optical waveguide disposed on the substrate. The optical waveguide comprises lithium niobate. The optical waveguide has a central ridge extending laterally along the substrate. A pair of electrodes is disposed on opposite sides of the central ridge of the optical waveguide.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: March 7, 2023
    Assignee: President and Fellows of Harvard College
    Inventors: Cheng Wang, Mian Zhang, Marko Loncar
  • Patent number: 11592693
    Abstract: A method for fabricating a tunable optical phased array, and a tunable optical phased array are disclosed by the present application. The tunable optical phased array includes: a substrate layer (10), a distributed Bragg reflector (20), a support layer (30), a piezoelectric layer (40), an antenna array (60), and a transducer module (50) configured to make interconversion between a phase control signal and a surface wave; the antenna array (60) and the distributed Bragg reflector (20) are used to form a Fabry Perot resonant cavity, and the phase control signal output by a signal source is concerted into the surface wave by the transducer module (50), and the surface wave is conducted to the antenna array (60) through the piezoelectric layer (40).
    Type: Grant
    Filed: September 29, 2019
    Date of Patent: February 28, 2023
    Inventor: Zhongxiang Zhang
  • Patent number: 11586062
    Abstract: An optoelectronic system includes a concentration layer, a modulation layer including an array of light modulators, an exit layer that receives the modulation layer output having a modulation layer output spatial distribution and remaps the modulation layer output spatial distribution to a modified spatial distribution. A collector layer receives the modified spatial distribution to produce a collector layer output. A detector receives the collector layer output. A processor controls the modulation layer and receives the detector output to generate an image. The collector layer can receive the modified spatial distribution at a plurality of collector layer inputs and combine the plurality of collector layer inputs at a collector layer output. Modulators can be configured to direct couple modulated light to a collector layer, without using an exit layer. Configurations with spatial light modulator modules and sub-modules are described.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: February 21, 2023
    Assignee: Syght, Inc.
    Inventors: Charles C. Partee, Kevin D. McKinstry
  • Patent number: 11573477
    Abstract: Aspects of the present disclosure describe techniques for controlling coherent crosstalk errors that occur in multi-channel acousto-optic modulators (AOMs) by applying cancellation tones to reduce or eliminate the crosstalk errors. For example, a method and systems are described that include applying a first radio frequency (RF) tone to generate a first acoustic wave in a first channel of the multi-channel AOM, wherein a portion of the first acoustic wave interacts with a second channel to cause a crosstalk effect, and applying a second RF tone to generate a second acoustic wave in the second channel, wherein the second acoustic wave reduces or eliminates the crosstalk effect caused by the portion of the first acoustic wave.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: February 7, 2023
    Inventors: Kristin Beck, Marko Cetina, Michael Goldman