Patents Assigned to Lumus Ltd.
  • Publication number: 20250258040
    Abstract: A device, system, and method are provided for processing an output of a color camera, such that the color camera may be used to measure color uniformity and resolution of an optical system. The processing includes converting an output of the color camera into an XYZ color space using a conversion matrix. The conversion matrix is generated by capturing color images and colorimeter measurements of three different wavelength ranges of light. The processing also includes overcoming the deBayering effect of the color camera to measure a resolution of the optical system using an optical test target displayed by the optical system. The optical test target has a uniform appearance along a direction of homogeneity. The resolution is determined based on a one-dimension image generated by performing a mathematical operation along the direction of homogeneity.
    Type: Application
    Filed: January 15, 2024
    Publication date: August 14, 2025
    Applicant: Lumus Ltd.
    Inventor: Eitan RONEN
  • Patent number: 12372798
    Abstract: A light-transmitting substrate has at least two major surfaces and is deployed with a first of the major surfaces in facing relation to an eye of a viewer. A light redirecting arrangement is associated with the light-transmitting substrate and deflects light from the eye toward an optical sensor that senses light, such that the light deflection occurs at the light-transmitting substrate and the deflected light that reaches the optical sensor is unguided by the light-transmitting substrate. A processor derives current gaze direction of the eye by processing signals from the optical sensor.
    Type: Grant
    Filed: June 25, 2024
    Date of Patent: July 29, 2025
    Assignee: Lumus Ltd.
    Inventors: Eitan Ronen, Ronen Chriki, Naamah Levin, Lilya Lobachinsky
  • Patent number: 12372700
    Abstract: A method of fabricating a light-guide optical element having a plurality of partially reflecting surfaces is disclosed. The method includes providing a plurality of transparent plates, each plate polished on two opposite surfaces such that the surfaces are parallel to each other, coating a first of the surfaces of a subset of plates with a first coating, coating a second of the surfaces of the subset of plates with a second coating; bonding together the plurality of transparent plates to form a stack, and cutting the stack along parallel planes obliquely angled to the faces of the transparent plates so as to form the optical element, wherein the first coating is a partially reflective coating have a first set of mechanical properties, and the second coating is selected from the group consisting of: a coating similar to the first coating and a non-reflective coating having a second set of mechanical properties substantially similar to the first set of mechanical properties.
    Type: Grant
    Filed: June 20, 2024
    Date of Patent: July 29, 2025
    Assignee: Lumus Ltd.
    Inventors: Elad Sharlin, Dror Hermoni
  • Publication number: 20250231410
    Abstract: An optical system may include (a) a light-guide optical element (LOE) formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection at the first and second major external surfaces, the LOE having a coupling-out arrangement for coupling out the image towards an eye of the user, the LOE having a coupling-in arrangement; and (b) an image projector comprising an image generator for generating an image and an image conjugate generator for generating a conjugate image.
    Type: Application
    Filed: April 4, 2025
    Publication date: July 17, 2025
    Applicant: Lumus Ltd.
    Inventors: Yochay DANZIGER, Eitan RONEN
  • Patent number: 12326574
    Abstract: An image projector includes a spatial light modulator (SLM) with a two dimensional array of pixel elements controllable to modulate a property of light transmitted or reflected by the pixel elements. An illumination arrangement delivers illumination to the SLM. A collimating arrangement collimates illumination from the SLM to generate a collimated image directed to an exit stop. The illumination arrangement is configured to sequentially illuminate regions of the SLM, each corresponding to a multiple pixel elements. A controller synchronously controls the pixel elements and the illumination arrangement so as to project a collimated image with pixel intensities corresponding to a digital image.
    Type: Grant
    Filed: December 21, 2022
    Date of Patent: June 10, 2025
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Naamah Levin, Shai Eisenberg
  • Patent number: 12320983
    Abstract: An image projector for injecting a collimated image into an entrance aperture of a lightguide employs collimating optics including a polarizing catadioptric arrangement to provide enhanced proximity of the principal plane of the collimating optics to the entrance aperture of the lightguide, thereby reducing the size of the optics or allowing an enlarged field of view for optics of a given size. Disclosed embodiments employ a front-lit polarization-modifying spatial light modulator (SLM) illuminated via a polarizing beam splitter (PBS) prism with a 30-degree or 45-degree PBS angle, laser scanning illumination arrangements, with or without an SLM, and active-matrix image generators combined via a dichroic combiner cube.
    Type: Grant
    Filed: August 17, 2023
    Date of Patent: June 3, 2025
    Assignee: Lumus Ltd.
    Inventor: Yochay Danziger
  • Publication number: 20250164790
    Abstract: A light projecting system may include a discrete light source matrix for emitting light corresponding to an image. The system may also include a waveguide formed from transparent material and having a coupling-in interface for coupling in the light corresponding to the image into the waveguide, and a coupling-out interface for coupling out the image out of the waveguide. The system may include an inner partially reflective surface and one or more partial lenses for enhancing color uniformity of the light projecting system.
    Type: Application
    Filed: May 29, 2023
    Publication date: May 22, 2025
    Applicant: Lumus Ltd.
    Inventor: Eitan RONEN
  • Patent number: 12271000
    Abstract: An optical system may include (a) a light-guide optical element (LOE) formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection at the first and second major external surfaces, the LOE having a coupling-out arrangement for coupling out the image towards an eye of the user, the LOE having a coupling-in arrangement; and (b) an image projector comprising an image generator for generating an image and an image conjugate generator for generating a conjugate image, the image generator and the image conjugate generator disposed such as to project the image and the conjugate image, respectively, from directions not directly in front of the LOE.
    Type: Grant
    Filed: September 2, 2022
    Date of Patent: April 8, 2025
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Eitan Ronen
  • Patent number: 12222535
    Abstract: A method for generating an image in a near-eye display may include operating a light source to emit the image as incident light. The light source may be configured such that incident light as received by the light reflecting elements compensates for the chromatic reflectance of the light reflecting elements. The method may include coupling the incident light into a light-transmitting substrate, thereby trapping the light between first and second major surfaces of the light-transmitting substrate by total internal reflection and coupling the light out of the substrate by the light reflecting elements having chromatic reflectance.
    Type: Grant
    Filed: August 5, 2023
    Date of Patent: February 11, 2025
    Assignee: Lumus Ltd.
    Inventors: Elad Sharlin, Ronen Chriki, Yochay Danziger
  • Publication number: 20240337844
    Abstract: An optical system may include (a) a light-guide optical element (LOE) formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection at the first and second major external surfaces, the LOE having a coupling-out arrangement for coupling out the image towards an eye of the user, the LOE having a coupling-in arrangement; and (b) an image projector comprising an image generator for generating an image and an image conjugate generator for generating a conjugate image, the image generator and the image conjugate generator disposed such as to project the image and the conjugate image, respectively, from directions not directly in front of the LOE.
    Type: Application
    Filed: September 2, 2022
    Publication date: October 10, 2024
    Applicant: Lumus Ltd.
    Inventors: Yochay DANZIGER, Eitan RONEN
  • Patent number: 12099239
    Abstract: An optical system may include (1) a light-guide optical element formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection, and (2) a mediating layer adjacent at least one of the at least first and second mutually-parallel major external surfaces, the mediating layer configured such that (1) reflectivity, averaged over the visible spectrum, of light coupled into the LOE and transmitted between the at least first and second mutually-parallel major external surfaces at angles below the critical angle is higher than the reflectivity that would have been expected absent the mediating layer and (2) reflectivity of purely white light lies closer to a purely white color point for an angular range from angles below the critical angle to the critical angle than the reflectivity that would have been expected absent the mediating layer.
    Type: Grant
    Filed: May 3, 2023
    Date of Patent: September 24, 2024
    Assignee: Lumus Ltd.
    Inventors: Elad Sharlin, Tsion Eisenfeld, Ronen Chriki
  • Publication number: 20240272361
    Abstract: An optical system may include (1) a light-guide optical element formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection, and (2) a mediating layer adjacent at least one of the at least first and second mutually-parallel major external surfaces, the mediating layer configured such that (1) reflectivity, averaged over the visible spectrum, of light coupled into the LOE and transmitted between the at least first and second mutually-parallel major external surfaces at angles below the critical angle is higher than the reflectivity that would have been expected absent the mediating layer and (2) reflectivity of purely white light lies closer to a purely white color point for an angular range from angles below the critical angle to the critical angle than the reflectivity that would have been expected absent the mediating layer.
    Type: Application
    Filed: May 3, 2023
    Publication date: August 15, 2024
    Applicant: Lumus Ltd.
    Inventors: Elad SHARLIN, Tsion EISENFELD, Ronen CHRIKI
  • Patent number: 12013529
    Abstract: A method of moderating chromaticity of ambient light in an environment reflected back into the environment by a component comprised in a lens of glasses through which a user of views the environment, the method comprising: determining a first set of tristimulus values that characterizes ambient light reflected by the component surface as a function of angle of reflection ? in a bounded span of angles of reflection; determining a second set of tristimulus values for angles in the bounded span of angles so that light characterized by the second set of tristimulus values combined with light reflected by the component would be perceived substantially as white light; and providing an optical coating that reflects ambient light from the environment so that the reflected light is substantially characterized by the second set of tristimulus values.
    Type: Grant
    Filed: April 19, 2023
    Date of Patent: June 18, 2024
    Assignee: Lumus Ltd.
    Inventors: Eitan Ronen, Elad Sharlin
  • Patent number: 11966062
    Abstract: A head-mounted augmented reality device (10) includes a pair of optical modules (12) for the right and left eyes of the user, each having a collimating display source (14) optically coupled to a light guide (16) for directing image illumination towards an eye of the user. A support structure (20) is supported by the head of the user. An optical bench (22) provides a first set of alignment features (26, 28, 32, 74) for aligning and affixing the right optical module and a second set of alignment features (26, 28, 32, 74) for aligning and affixing the left optical module. A suspension arrangement suspends the optical bench relative to the support structure. The optical bench (22) provides the sole mechanical connection between the pair of optical modules (12) and the support structure (20).
    Type: Grant
    Filed: April 30, 2023
    Date of Patent: April 23, 2024
    Assignee: Lumus Ltd.
    Inventors: Yaakov Greenstein, Uri Shultz, Shmuel Friedman
  • Patent number: 11953682
    Abstract: An optical aperture multiplier includes a first optical waveguide (10) having a rectangular cross-section and including partially reflecting surfaces (40) at an oblique angle to a direction of elongation of the waveguide. A second optical waveguide (20), also including partially reflecting surfaces (45) at an oblique angle, is optically coupled with the first optical waveguide (10). An image coupled into the first optical waveguide with an initial direction of propagation at an oblique coupling angle advances by four-fold internal reflection along the first optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be coupled into the second optical waveguide, and then propagates through two-fold reflection within the second optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be directed outwards from one of the parallel faces as a visible image.
    Type: Grant
    Filed: May 11, 2023
    Date of Patent: April 9, 2024
    Assignee: Lumus Ltd.
    Inventor: Yochay Danziger
  • Patent number: 11947130
    Abstract: A first dichroic beamsplitter is deployed in a first prism on a plane oblique to a light-wave entrance surface. A second dichroic beamsplitter is deployed in a second prism on a plane oblique to a light-wave entrance surface such that polarized light in a first polarization state relative to the first dichroic beamsplitter is in a second polarization state relative to the second dichroic beamsplitter. The first dichroic beamsplitter transmits polarized light of a first color in the first polarization state relative to the first dichroic beamsplitter, and reflects polarized light of a second color in the first polarization state relative to the first dichroic beamsplitter. The second dichroic beamsplitter transmits polarized light of the first and second colors in a second polarization state relative to the second dichroic beamsplitter, and reflects polarized light of a third color in the first polarization state relative to the second dichroic beamsplitter.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: April 2, 2024
    Assignee: Lumus Ltd.
    Inventors: Eitan Ronen, Motke Gilo
  • Patent number: 11940625
    Abstract: A display includes a light-guide optical element (LOE) (20) and a projector arrangement (10a) for injecting an image into the LOE so as to propagate within the LOE by internal reflection at a pair of major faces. The image is coupled out from the LOE by a coupling-out arrangement, exemplified here as internal partially-reflecting surfaces (22b). The image is coupled out from the LOE in a direction away from the eye of the observer (24b), and a reflector (30) reflects the coupled-out image back through the LOE (32), towards the eye of the observer (26). Reflector (30) is preferably a selective partial reflector, and may be convex to provide a desired apparent image distance.
    Type: Grant
    Filed: November 10, 2019
    Date of Patent: March 26, 2024
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Ronen Chriki, Daniel Michaels
  • Patent number: 11934002
    Abstract: An optical system including a light-guide optical element (LOE) with first and second sets (204, 206) of mutually-parallel, partially-reflecting surfaces at different orientations. Both sets of partially-reflecting surfaces are located between parallel major external surfaces. A third set of at least partially-reflecting surfaces (202), deployed at the coupling-in region, receive image illumination injected from a projector (2) with an optical aperture having a first in-plane width and direct the image illumination via reflection of at least part of the image illumination at the third set of at least partially-reflective facets towards the first set of partially-reflective facets with an effective optical aperture having a second width larger than the first width.
    Type: Grant
    Filed: June 28, 2023
    Date of Patent: March 19, 2024
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Ronen Chriki, Jonathan Gelberg
  • Patent number: 11927734
    Abstract: A light-guide device includes a light guiding element (13) with a number of faces, including two parallel faces (26), for guiding light by internal reflection. A transparent optical element (19) has an interface surface for attachment to a coupling surface (14) of the light guiding element, and is configured such that light propagating within the transparent optical element passes through the interface surface and the coupling surface (14) so as to propagate within the light guiding element (13). A non-transparent coating (15) is applied to at least part of one or more faces of the light guiding element (13), defining an edge (17) adjacent to, or overlapping, the coupling surface (14) of the light guiding element (13). A quantity of transparent adhesive is deployed between the coupling surface and the interface surface so as to form an optically transmissive interface. An overspill region 31 of the adhesive extends to, and overlaps, the edge (17).
    Type: Grant
    Filed: July 5, 2022
    Date of Patent: March 12, 2024
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Edgar Friedmann
  • Patent number: 11902714
    Abstract: An image projector employing a laser scanning illumination arrangement to illumination a spatial light modulator (SLM), where an angular beam spreader element, typically a diffuser or a micro-lens array (MLA), adjacent to, or in a conjugate plane with, the SLM, enhances filling of the exit aperture while minimizing impact on the precision of scanning of the laser illumination on the SLM. Also disclosed are various schemes for synchronous rolling update of the SLM during scanned illumination, and systems employing binary-switchable SLMs.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: February 13, 2024
    Assignee: Lumus Ltd.
    Inventors: Yochay Danziger, Daniel Michaels