Patents Assigned to Lumus Ltd.
  • 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
  • Patent number: 11892761
    Abstract: An image projector with a high optical efficiency projects an image at an arbitrary distance from an observer. The image projector includes an illumination module having at least one spatially coherent light source; a phase image generator with an array of optical phase shifting elements; an electronic image controller connected electrically to the phase image generator; and a waveguide which includes at least one embedded partial reflector. The waveguide may be positioned either between the illumination module and the waveguide, or between the waveguide and the observer. The phase image generator may include phase shifts for canceling speckle, correcting optical aberrations, and/or compensating interference caused by light rays having different optical path lengths.
    Type: Grant
    Filed: November 29, 2020
    Date of Patent: February 6, 2024
    Assignee: Lumus Ltd.
    Inventors: Ronen Chriki, Eitan Ronen, Yochay Danziger, Shimon Grabarnik, Tsion Eisenfeld
  • Patent number: 11892677
    Abstract: A method of fabricating a compound light-guide optical element (LOE) is provided. A bonded stack of a plurality of LOE precursors and a plurality of transparent spacer plates alternating therebetween is bonded to a first optical block having a plurality of mutually parallel obliquely angled internal surfaces. The block is joined to the stack such that first plurality of partially reflective internal surfaces of the block is non-parallel to the internal surfaces of the LOE precursor. After bonding, a second optical is thereby formed. At least one compound LOE is sliced-out of the second optical block by cutting the second block through at least two consecutive spacer plates having a LOE precursor sandwiched therebetween.
    Type: Grant
    Filed: April 16, 2023
    Date of Patent: February 6, 2024
    Assignee: Lumus Ltd.
    Inventors: Shimon Grabarnik, Tsion Eisenfeld
  • Publication number: 20240036333
    Abstract: A method for generating an image in a near-eye display may include dividing an image into first and second sub-images, sequentially transmitting the first sub-image and the second sub-image through a channel, extracting light corresponding to the first sub-image in a first polarization and light corresponding to the second sub-image in a second polarization, deflecting a first order of the light in the first polarization in a first direction, and deflecting an opposite order of the light in the second polarization in a opposite direction different from the first direction. The resulting image width corresponding to a wider field of view.
    Type: Application
    Filed: March 21, 2022
    Publication date: February 1, 2024
    Applicant: Lumus Ltd.
    Inventors: Ronen CHRIKI, Eitan RONEN, Elad SHARLIN
  • Patent number: 11885966
    Abstract: An optical system provides two-stage expansion of an input optical aperture for a display based on a light-guide optical element. A first expansion is achieved using two distinct sets of mutually-parallel partially-reflecting surfaces, each set handing a different part of an overall field-of-view presented to the eye. In some cases, a single image projector provides image illumination to two sets of facets that are integrated into the LOE. In other cases, two separate projectors deliver image illumination corresponding to two different parts of the field-of-view to their respective sets of facets.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: January 30, 2024
    Assignee: Lumus Ltd.
    Inventors: Eitan Ronen, Ronen Chriki, Tsion Eisenfeld
  • Patent number: 11841526
    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: July 1, 2022
    Date of Patent: December 12, 2023
    Assignee: Lumus Ltd.
    Inventors: Elad Sharlin, Ronen Chriki, Yochay Danziger
  • Publication number: 20230384506
    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: Application
    Filed: August 5, 2023
    Publication date: November 30, 2023
    Applicant: Lumus Ltd.
    Inventors: Elad SHARLIN, Ronen CHRIKI, Yochay DANZIGER
  • Publication number: 20230266597
    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: Application
    Filed: April 30, 2023
    Publication date: August 24, 2023
    Applicant: Lumus Ltd.
    Inventors: Yaakov GREENSTEIN, Uri SHULTZ, Shmuel FRIEDMAN