Patents by Inventor Pasi Saarikko

Pasi Saarikko 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: 20160231570
    Abstract: A wearable image display system comprises a headpiece, a first and a second light engine, and a first and a second optical component. The first and second light engines generate a first and a second set of beams respectively, each beam substantially collimated so that the first and second set form a first and a second virtual image respectively. Each optical component is located to project an image onto a first and a second eye of a wearer respectively. The first and second sets of beams are directed to incoupling structures of the first and second optical components respectively. Exit structures of the first and second optical components guide the first and second sets of beams onto the first and second eyes respectively. The optical components are located between the light engines and the eyes. Both of the light engines are mounted to a central portion of the headpiece.
    Type: Application
    Filed: February 9, 2015
    Publication date: August 11, 2016
    Inventors: Tapani Levola, Pasi Saarikko, Steven John Robbins, Yarn Chee Poon, Lena Adele Wolfe, Erica Lee Towle
  • Patent number: 9372347
    Abstract: A display system comprises an optical waveguide and a light engine. The light engine generates multiple input beams which form a virtual image. An incoupling grating of the waveguide couples each beam into an intermediate grating of the waveguide, in which that beam is guided onto multiple splitting regions. The intermediate grating splits that beam at the splitting regions to provide multiple substantially parallel versions of that beam. Those multiple versions are coupled into an exit grating of the waveguide, in which the multiple versions are guided onto multiple exit regions. The exit grating diffracts the multiple versions of that beam outwardly. The multiple input beams thus cause multiple exit beams to exit the waveguide which form a version of the virtual image. One or more surfaces of the intermediate grating comprise surface variations such that a visible banding effect is eliminated from the version of the virtual image.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: June 21, 2016
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Tapani Levola, Tuomas Vallius, Pasi Saarikko
  • Patent number: 9304235
    Abstract: Microfabrication processes and apparatuses for fabricating microstructures on a substrate are disclosed. The substrate has a current diffraction grating pattern formed by current surface modulations over at least a portion of the substrate's surface that exhibit a substantially uniform grating linewidth over the surface portion. An immersion depth of the substrate in a fluid for patterning the substrate is gradually changed so that different points on the surface portion are immersed for different immersion times. The fluid changes the linewidth of the surface modulations at each immersed point on the surface portion by an amount determined by the immersion time of that point, thereby changing the current diffraction grating pattern to a new diffraction grating pattern formed by new surface modulations over the surface portion that exhibit a spatially varying grating linewidth that varies over the surface portion.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: April 5, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Lauri Sainiemi, Tapani Levola, Pasi Saarikko
  • Publication number: 20160033784
    Abstract: Various optical components are disclosed herein, which have diffraction gratings formed by modulations of at least portions of their outer surfaces. The gratings exhibit gradually varying characteristics that vary over the surface portion so as to gradually vary the manner in which the incident light is diffracted at different points on the surface portion. Display systems incorporating such optical components are also disclosed.
    Type: Application
    Filed: July 30, 2014
    Publication date: February 4, 2016
    Inventors: Tapani Levola, Lauri Sainiemi, Pasi Saarikko
  • Publication number: 20160033697
    Abstract: Microfabrication processes and apparatuses for fabricating microstructures on a substrate are disclosed. The substrate has a current diffraction grating pattern formed by current surface modulations over at least a portion of the substrate's surface that exhibit a substantially uniform grating linewidth over the surface portion. An immersion depth of the substrate in a fluid for patterning the substrate is gradually changed so that different points on the surface portion are immersed for different immersion times. The fluid changes the linewidth of the surface modulations at each immersed point on the surface portion by an amount determined by the immersion time of that point, thereby changing the current diffraction grating pattern to a new diffraction grating pattern formed by new surface modulations over the surface portion that exhibit a spatially varying grating linewidth that varies over the surface portion.
    Type: Application
    Filed: July 30, 2014
    Publication date: February 4, 2016
    Inventors: Lauri Sainiemi, Tapani Levola, Pasi Saarikko
  • Publication number: 20160035539
    Abstract: A microfabrication apparatus for fabricating a microstructure on a substrate is disclosed and comprises a partitioning system arranged to provide an aperture, a particle source that can generate a beam of particles for patterning the substrate and a substrate holder which supports the substrate. Relative motion is effected between the aperture and the substrate over a portion of the substrate's surface so that different points on the surface portion are exposed at different times. Whilst that motion is ongoing, one or more exposure conditions are varied so that the different points are subject to different exposure conditions. Corresponding microfabrication processes and products obtained thereby are also disclosed.
    Type: Application
    Filed: July 30, 2014
    Publication date: February 4, 2016
    Inventors: Lauri Sainiemi, Tapani Levola, Pasi Saarikko
  • Publication number: 20150185475
    Abstract: A transparent waveguide for use in eye tracking includes an input-coupler and an output-coupler. The input-coupler comprises a plurality of curved grating lines having a radially varying pitch. When positioned in front of an eye illuminated with infrared light, infrared light beams reflected from the eye and incident on the input-coupler enter the waveguide at the input-coupler, propagate through the waveguide by way of total internal reflections, and exit the waveguide proximate the output-coupler.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 2, 2015
    Inventors: Pasi Saarikko, Xinye Lou, Scott McEldowney, Steven Robbins, Tapani Levola
  • Patent number: 8830584
    Abstract: The specification and drawings present a new apparatus and method for using exit pupil expanders (EPE) with spherical or aspheric non-flat substrates and a plurality of diffractive elements for expanding the exit pupil of a display for viewing in order to reduce image spreading. This can also enable improved image resolution and utilization of shorter focus distances.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: September 9, 2014
    Assignee: Nokia Corporation
    Inventors: Pasi Saarikko, Tapani Levola
  • Publication number: 20140009833
    Abstract: A lens including: a central refracting portion and a peripheral portion configured to support the lens in a lens mount wherein the peripheral portion has a surface including at least one out-coupling element configured to couple light out of the lens.
    Type: Application
    Filed: February 14, 2011
    Publication date: January 9, 2014
    Applicant: Nokia Corporation
    Inventors: Mikko Juhola, Pasi Saarikko, Marko Parikka
  • Publication number: 20130314789
    Abstract: A first optical arrangement is configured to couple into an apparatus a first component of a light beam having a wavelength within a first spectral range; a second optical arrangement configured to couple a second component of the light beam having a wavelength within a different second spectral range; a third optical arrangement configured to expand the first component in a first dimension to create an expanded first component; a fourth optical arrangement configured to expand, in a second dimension, the expanded first component to create a further expanded first component, and to output the further expanded first component; a fifth optical arrangement configured to expand the second component in the second dimension to create an expanded second component; and a sixth optical arrangement configured to expand, in the first dimension, the expanded second component to create a further expanded second component, and to output the further expanded second component.
    Type: Application
    Filed: March 4, 2010
    Publication date: November 28, 2013
    Applicant: NOKIA CORPORATION
    Inventor: Pasi Saarikko
  • Patent number: 8508848
    Abstract: The specification and drawings present a new apparatus and method for providing a wide field-of-view as well as illumination uniformity in exit pupil expanders (EPE) using stacked EPE substrates (or plates) with non-symmetric exit pupil expansion that use a plurality of diffractive elements for expanding the exit pupil of a display for viewing.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: August 13, 2013
    Assignee: Nokia Corporation
    Inventor: Pasi Saarikko
  • Patent number: 8432363
    Abstract: The specification and drawings present a new apparatus and manufacturing method for optical protrusions (e.g., dome pins or actuators) attached to a light guide for providing backlight, actuation function and/or tactile feedback in keypad modules of electronic devices. Spatially and spectrally selective out-coupling of light from the light guide (e.g., a planar light guide plate) can be accomplished using these optical actuators integrated with the light guide for keypad illumination to control out-coupling efficiency and/or spectra of the out-coupled light to enable modification of the visual appearance (intensity, colored/white) of individual keys of the keypad.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: April 30, 2013
    Assignee: Nokia Corporation
    Inventors: Pasi Saarikko, Pauli Laitinen, Juha Pietarinen
  • Patent number: 8194325
    Abstract: An apparatus and a method are provided. The apparatus including: a light expander configured to expand light, input into the light expander, in a first dimension, and configured to provide diverging light that diverges in the first dimension; and an optical device configured to redirect diverging light, received from the light expander, to produce converging light that converges in the first dimension.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: June 5, 2012
    Assignee: Nokia Corporation
    Inventors: Tapani Levola, Pasi Saarikko
  • Patent number: 8160411
    Abstract: A diffractive beam expander (50) comprises an input grating (10), a crossed grating (20), and an output grating (30) implemented on a planar transparent substrate (7). The crossed grating (20) comprises a plurality of diffractive features (23) arranged along the lines of a first set of parallel lines (25) and along the lines of a second set of parallel lines (26) such that the lines (25) of the first set are parallel to the lines (26) of the second set. The lines of the first set have a first grating period and the lines of the second set have a second grating period. A light beam (B1) coupled into the substrate (7) by the input grating (10) impinges on the crossed grating (20) at a first location (EC1) and further locations (EC2). Interaction at the first location (EC1) provides several sub-beams (S00, S01, S10) which propagate in different directions.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: April 17, 2012
    Assignee: Nokia Corporation
    Inventors: Tapani Levola, Pasi Saarikko
  • Publication number: 20110002143
    Abstract: A light guide plate (100) has an input face (11) to couple light (B0) emitted by a light source (50) into said light guide (100), and an out-coupling grating (30) to couple light (B2) out of said light guide (100). Said out-coupling grating (30) is substantially perpendicular to said input face (11). A rough cut side of a light guide (100) is processed by a heated surface processing member (701) to smooth out irregularities and/or to implement a further diffraction grating (12) on said input face (11). The efficiency of coupling light out of the light guide (100) may be substantially increased and/or stray light effects may be reduced.
    Type: Application
    Filed: December 28, 2006
    Publication date: January 6, 2011
    Applicant: NOKIA CORPORATION
    Inventors: Pasi Saarikko, Pauli Laitinen, Mika Kauhanen
  • Publication number: 20100328794
    Abstract: An apparatus and a method are provided. The apparatus including: a light expander configured to expand light, input into the light expander, in a first dimension, and configured to provide diverging light that diverges in the first dimension; and an optical device configured to redirect diverging light, received from the light expander, to produce converging light that converges in the first dimension.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Tapani LEVOLA, Pasi SAARIKKO
  • Publication number: 20100321781
    Abstract: A diffractive beam expander (50) comprises an input grating (10), a crossed grating (20), and an output grating (30) implemented on a planar transparent substrate (7). The crossed grating (20) comprises a plurality of diffractive features (23) arranged along the lines of a first set of parallel lines (25) and along the lines of a second set of parallel lines (26) such that the lines (25) of the first set are parallel to the lines (26) of the second set. The lines of the first set have a first grating period and the lines of the second set have a second grating period. A light beam (B1) coupled into the substrate (7) by the input grating (10) impinges on the crossed grating (20) at a first location (EC1) and further locations (EC2). Interaction at the first location (EC1) provides several sub-beams (S00, S01, S10) which propagate in different directions.
    Type: Application
    Filed: December 28, 2006
    Publication date: December 23, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Tapani Levola, Pasi Saarikko
  • Publication number: 20100315719
    Abstract: The specification and drawings present a new apparatus and method for using exit pupil expanders (EPE) with spherical or aspheric non-flat substrates and a plurality of diffractive elements for expanding the exit pupil of a display for viewing in order to reduce image spreading. This can also enable improved image resolution and utilization of shorter focus distances.
    Type: Application
    Filed: December 17, 2007
    Publication date: December 16, 2010
    Inventors: Pasi Saarikko, Tapani Levola
  • Publication number: 20100295792
    Abstract: The specification and drawings present a new apparatus and manufacturing method for optical protrusions (e.g., dome pins or actuators) attached to a light guide for providing backlight, actuation function and/or tactile feedback in keypad modules of electronic devices. Spatially and spectrally selective out-coupling of light from the light guide (e.g., a planar light guide plate) can be accomplished using these optical actuators integrated with the light guide for keypad illumination to control out-coupling efficiency and/or spectra of the out-coupled light to enable modification of the visual appearance (intensity, colored/white) of individual keys of the keypad.
    Type: Application
    Filed: February 23, 2007
    Publication date: November 25, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Pasi Saarikko, Pauli Laitinen, Juha Pietarinen
  • Publication number: 20100296163
    Abstract: The specification and drawings present a new apparatus and method for providing a wide field-of-view as well as illumination uniformity in exit pupil expanders (EPE) using stacked EPE substrates (or plates) with non-symmetric exit pupil expansion that use a plurality of diffractive elements for expanding the exit pupil of a display for viewing.
    Type: Application
    Filed: December 18, 2007
    Publication date: November 25, 2010
    Inventor: Pasi Saarikko