Patents by Inventor Joshua A Hudman

Joshua A Hudman 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: 10024968
    Abstract: An optical module, for use in a depth camera, includes a plurality of laser emitting elements, each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes a plurality of lenslets. Laser beams emitted by adjacent laser emitting elements at least partially overlap one another prior to being incident on the MLA For each lenslet of at least a majority of the lenslets of the MLA, the lenslet is at least partially filled by light corresponding to laser beams emitted by at least two of the laser emitting elements. The inclusion of the plurality of laser emitting elements is used to reduce speckle contrast. The overlap of the laser beams, and the at least partially filling of the lenslets of the MLA with light corresponding to laser beams emitted by multiple laser emitting elements, is used to reduce diffraction artifacts.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: July 17, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Joshua Hudman, Marshall DePue
  • Publication number: 20180038996
    Abstract: Methods and apparatus are provided for displaying an image to a viewer, for example in a head-mounted display (HMD) application, with reduced visual artifacts such as screen-door effect. A phase optic is disposed between the HMD lens and the user's eye. The optic changes the distribution of the light so the user's eye cannot focus the light better than the sub-pixel distance. The user can therefore not resolve the sub-pixel structure, and the structure therefore appears as one larger pixel, mitigating the screen-door effect. A significant reduction in screen-door effect visual artifacts arising from the periodic structure of the display panel may therefore be obtained.
    Type: Application
    Filed: August 1, 2017
    Publication date: February 8, 2018
    Applicant: VALVE CORPORATION
    Inventor: Joshua Hudman
  • Publication number: 20170188016
    Abstract: A depth camera includes an illumination module and an image detector module. The illumination module outputs structured light that illuminates a capture area. The image detector module captures an image of the structured light as reflected from object(s) within the capture area. The illumination module includes a VCSEL array and optical element(s), such as projection optics, an MLA or DOE, or combinations thereof. Projection optics receive a light pattern emitted by the VCSEL array and project the light pattern. An optical element, downstream from the projection optics, can cause a total number of features included in the structured light to be greater than the number of features included in the light pattern projected by the projection optics. In an embodiment, a pitch of an MLA is offset relative to a pitch of the VCSEL array. Various structures can include alignment elements to aid manufacture of the illumination module.
    Type: Application
    Filed: August 17, 2016
    Publication date: June 29, 2017
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Joshua Hudman, Prafulla Masalkar
  • Publication number: 20160341829
    Abstract: An optical module, for use in a depth camera, includes a plurality of laser emitting elements, each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes a plurality of lenslets. Laser beams emitted by adjacent laser emitting elements at least partially overlap one another prior to being incident on the MLA For each lenslet of at least a majority of the lenslets of the MLA, the lenslet is at least partially filled by light corresponding to laser beams emitted by at least two of the laser emitting elements. The inclusion of the plurality of laser emitting elements is used to reduce speckle contrast. The overlap of the laser beams, and the at least partially filling of the lenslets of the MLA with light corresponding to laser beams emitted by multiple laser emitting elements, is used to reduce diffraction artifacts.
    Type: Application
    Filed: August 4, 2016
    Publication date: November 24, 2016
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Joshua Hudman, Marshall DePue
  • Patent number: 9462253
    Abstract: An optical module, for use in a depth camera, includes a plurality of laser emitting elements, each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes a plurality of lenslets. Laser beams emitted by adjacent laser emitting elements at least partially overlap one another prior to being incident on the MLA For each lenslet of at least a majority of the lenslets of the MLA, the lenslet is at least partially filled by light corresponding to laser beams emitted by at least two of the laser emitting elements. The inclusion of the plurality of laser emitting elements is used to reduce speckle contrast. The overlap of the laser beams, and the at least partially filling of the lenslets of the MLA with light corresponding to laser beams emitted by multiple laser emitting elements, is used to reduce diffraction artifacts.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: October 4, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Joshua Hudman, Marshall DePue
  • Patent number: 9443310
    Abstract: A depth camera includes an illumination module and an image detector module. The illumination module outputs structured light that illuminates a capture area. The image detector module captures an image of the structured light as reflected from object(s) within the capture area. The illumination module includes a VCSEL array and optical element(s), such as projection optics, an MLA or DOE, or combinations thereof. Projection optics receive a light pattern emitted by the VCSEL array and project the light pattern. An optical element, downstream from the projection optics, can cause a total number of features included in the structured light to be greater than the number of features included in the light pattern projected by the projection optics. In an embodiment, a pitch of an MLA is offset relative to a pitch of the VCSEL array. Various structures can include alignment elements to aid manufacture of the illumination module.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: September 13, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Joshua Hudman, Prafulla Masalkar
  • Publication number: 20160097929
    Abstract: An optical structure useful in a see-through head mounted display apparatus is provided. A first and a second partially reflective and transmissive elements are configured to receive the output of any number of optical sources via an optical element. Each reflective and transmissive element is positioned along an optical viewing axis for a wearer of the device with an air gap between the elements. Each reflective and transmissive element has a geometric axis which is positioned in an off-axis relationship with respect to the optical viewing axis. The off-axis relationship may comprise the geometric axis of one or both elements being at an angle with respect to the optical viewing axis and/or vertically displaced with respect to the optical viewing axis.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 7, 2016
    Inventors: Dawson Yee, Joshua Hudman
  • Publication number: 20160041390
    Abstract: The technology provides decoupling an aspheric optical element from a birdbath optical element in a near-eye display (NED) device. One or more aspheric lens are used with a spherical birdbath reflective mirror in a projection light engine of a NED device. A projection light engine provides image light (or other information), by way of the spherical birdbath reflective mirror and at least one aspheric lens, to a near-eye display of the NED device. The spherical birdbath reflective mirror collimates and reflects the image light to an exit pupil external to the projection light engine. Decoupling the aspheric optical element from the spherical birdbath reflective mirror may enable high modulation transfer function (MTF) and improved manufacturability of the projection light engine. The NED device having aspheric optical elements decoupled from a birdbath optical element may be positioned by a support structure in a head-mounted display (HMD) or head-up display (HUD).
    Type: Application
    Filed: August 7, 2014
    Publication date: February 11, 2016
    Inventors: Yarn Chee Poon, Joshua A Hudman, R Andrew Wall, Scott McEldowney, Steven John Robbins
  • Publication number: 20150097947
    Abstract: A depth camera includes an illumination module and an image detector module. The illumination module outputs structured light that illuminates a capture area. The image detector module captures an image of the structured light as reflected from object(s) within the capture area. The illumination module includes a VCSEL array and optical element(s), such as projection optics, an MLA or DOE, or combinations thereof. Projection optics receive a light pattern emitted by the VCSEL array and project the light pattern. An optical element, downstream from the projection optics, can cause a total number of features included in the structured light to be greater than the number of features included in the light pattern projected by the projection optics. In an embodiment, a pitch of an MLA is offset relative to a pitch of the VCSEL array. Various structures can include alignment elements to aid manufacture of the illumination module.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: Microsoft Corporation
    Inventors: Joshua Hudman, Prafulla Masalkar
  • Publication number: 20150085075
    Abstract: An optical module, for use in a depth camera, includes a plurality of laser emitting elements, each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes a plurality of lenslets. Laser beams emitted by adjacent laser emitting elements at least partially overlap one another prior to being incident on the MLA For each lenslet of at least a majority of the lenslets of the MLA, the lenslet is at least partially filled by light corresponding to laser beams emitted by at least two of the laser emitting elements. The inclusion of the plurality of laser emitting elements is used to reduce speckle contrast. The overlap of the laser beams, and the at least partially filling of the lenslets of the MLA with light corresponding to laser beams emitted by multiple laser emitting elements, is used to reduce diffraction artifacts.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 26, 2015
    Applicant: Microsoft Corporation
    Inventors: Joshua Hudman, Marshall DePue
  • Publication number: 20150070489
    Abstract: Disclosed herein are optical modules for use with depth cameras, and systems that include a depth camera. The optical module spreads out a laser beam, output by a laser source of the optical module, so that the laser beam output by the optical module does not look bright, and thus, does not draw attention to the laser light. Such an optical module can include an optical structure that modifies the laser beam so that its horizontal and vertical angles of divergence are substantially equal to desired horizontal and vertical angles of divergence, and so that its illumination profile is substantially equal to a desired illumination profile. This is beneficial since a scene should be illuminated by light having predetermined desired horizontal and vertical angles of divergence and a predetermined desired illumination profile in order for a depth camera to obtain high resolution depth images.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 12, 2015
    Applicant: Microsoft Corporation
    Inventors: Joshua Hudman, Prafulla Masalkar