Patents by Inventor Tsion EISENFELD
Tsion EISENFELD 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).
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Publication number: 20240151893Abstract: 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: ApplicationFiled: January 18, 2024Publication date: May 9, 2024Inventors: Shimon GRABARNIK, Tsion EISENFELD
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Publication number: 20240155088Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.Type: ApplicationFiled: January 16, 2024Publication date: May 9, 2024Inventors: Kobi GREENSTEIN, Tsion EISENFELD, Netanel GOLDSTEIN
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Publication number: 20240134257Abstract: 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: ApplicationFiled: December 26, 2023Publication date: April 25, 2024Inventors: Ronen CHRIKI, Eitan RONEN, Yochay DANZIGER, Shimon GRABARNIK, Tsion EISENFELD
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Publication number: 20240134202Abstract: 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: ApplicationFiled: January 4, 2024Publication date: April 25, 2024Inventors: Eitan RONEN, Ronen CHRIKI, Tsion EISENFELD
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Publication number: 20240126085Abstract: An optical system includes a light-guide optical element (LOE) (10) having mutually-parallel first and second major external surfaces (11, 12) for guiding light by internal reflection, and a projector (100) that projects illumination corresponding to a collimated image from an aperture (101). The projector injects light in to the LOE via a coupling prism (30) attached to the first major external surface (11) that projects an image injection surface. A reflective polarizing beam splitter (51) is deployed at an interface between the major external surface (11) and the coupling prism (30) parallel to the major external surfaces, to selectively transmit illumination from the coupling prism into the LOE while trapping light already within the LOE so as to propagate within the LOE by internal reflection.Type: ApplicationFiled: December 20, 2023Publication date: April 18, 2024Inventors: Ronen CHRIKI, Tsion EISENFELD, Elad SHARLIN
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Patent number: 11940641Abstract: A light pipe includes at least two optical structures having different refractive indices. An interface between the two optical structures is oblique to a longitudinal axis of the light pipe such that an output ray from an output surface at a distal end of the light pipe is non-parallel to an input ray that is parallel to the longitudinal axis at an input surface at a proximal end of the light pipe. Light refracts inside the light pipe between the (at least) two optical structures altering the direction of an optical path of the light through the light pipe, thereby allowing higher degrees of freedom for the selection of the angle of deviation (folding angle) of the light pipe. By optimizing various parameters of the light pipe, a desired output optical axis angle (i.e., folding angle) can be achieved that suits the desired optical engine envelope.Type: GrantFiled: September 14, 2020Date of Patent: March 26, 2024Assignee: LUMUS LTD.Inventors: Tsion Eisenfeld, Jonathan Gelberg
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Patent number: 11902716Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.Type: GrantFiled: September 28, 2023Date of Patent: February 13, 2024Assignee: LUMUS LTD.Inventors: Kobi Greenstein, Tsion Eisenfeld, Netanel Goldstein
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Patent number: 11892761Abstract: 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: GrantFiled: November 29, 2020Date of Patent: February 6, 2024Assignee: Lumus Ltd.Inventors: Ronen Chriki, Eitan Ronen, Yochay Danziger, Shimon Grabarnik, Tsion Eisenfeld
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Patent number: 11892677Abstract: 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: GrantFiled: April 16, 2023Date of Patent: February 6, 2024Assignee: Lumus Ltd.Inventors: Shimon Grabarnik, Tsion Eisenfeld
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Patent number: 11885966Abstract: 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: GrantFiled: December 30, 2020Date of Patent: January 30, 2024Assignee: Lumus Ltd.Inventors: Eitan Ronen, Ronen Chriki, Tsion Eisenfeld
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Publication number: 20240022695Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.Type: ApplicationFiled: September 28, 2023Publication date: January 18, 2024Inventors: Kobi GREENSTEIN, Tsion EISENFELD, Netanel GOLDSTEIN
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Patent number: 11860369Abstract: An optical system includes a light-guide optical element (LOE) (10) having mutually-parallel first and second major external surfaces (11, 12) for guiding light by internal reflection, and a projector (100) that projects illumination corresponding to a collimated image from an aperture (101). The projector injects light in to the LOE via a coupling prism (30) attached to the first major external surface (11) that projects an image injection surface. A reflective polarizing beam splitter (51) is deployed at an interface between the major external surface (11) and the coupling prism (30) parallel to the major external surfaces, to selectively transmit illumination from the coupling prism into the LOE while trapping light already within the LOE so as to propagate within the LOE by internal reflection.Type: GrantFiled: March 1, 2022Date of Patent: January 2, 2024Assignee: LUMUS LTD.Inventors: Ronen Chriki, Tsion Eisenfeld, Elad Sharlin
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Publication number: 20230418052Abstract: In an embodiment, an apparatus is disclosed that includes at least one processor. The at least one processor is configured to select a light source from a plurality of lights sources based at least in part on a location of a pupil of an eye relative to an eye motion box. The selected light source is configured to illuminate a portion of the eye motion box that corresponds to the location of the pupil with a light beam. The at least one processor is further configured to activate the selected light source to illuminate the portion of the eye motion box.Type: ApplicationFiled: December 6, 2021Publication date: December 28, 2023Applicant: LUMUS LTD.Inventors: Shimon GRABARNIK, Tsion EISENFELD
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Publication number: 20230351930Abstract: In an embodiment, an apparatus is disclosed that includes at least one processor configured to determine a target portion of an eye motion box and to identify a facet of a light-guide optical element that is configured to direct a light beam comprising at least a portion of an image field of view toward the target portion of the eye motion box. The at least one processor is configured to identify a display region of an image generator that is configured to inject the light beam into the light-guide optical element at an angle that, in conjunction with the identified facet, is configured to direct the light beam toward the target portion of the eye motion box. The at least one processor is configured to selectively activate the identified facet and the identified display region to direct the light beam toward the target portion of the eye motion box.Type: ApplicationFiled: July 10, 2023Publication date: November 2, 2023Applicant: LUMUS LTD.Inventors: Shimon GRABARNIK, Tsion EISENFELD, Elad SHARLIN
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Publication number: 20230350204Abstract: An optical system includes a light-guide optical element (LOE) (10) having mutually-parallel first and second major external surfaces (11, 12) for guiding light by internal reflection, and a projector (100) that projects illumination corresponding to a collimated image from an aperture (101). The projector injects light in to the LOE via a coupling prism (30) attached to the first major external surface (11) that projects an image injection surface. A reflective polarizing beam splitter (51) is deployed at an interface between the major external surface (11) and the coupling prism (30) parallel to the major external surfaces, to selectively transmit illumination from the coupling prism into the LOE while trapping light already within the LOE so as to propagate within the LOE by internal reflection.Type: ApplicationFiled: March 1, 2022Publication date: November 2, 2023Inventors: Ronen CHRIKI, Tsion EISENFELD, Elad SHARLIN
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Patent number: 11805232Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.Type: GrantFiled: June 19, 2023Date of Patent: October 31, 2023Assignee: LUMUS LTD.Inventors: Kobi Greenstein, Tsion Eisenfeld, Netanel Goldstein
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Publication number: 20230344969Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.Type: ApplicationFiled: June 19, 2023Publication date: October 26, 2023Inventors: Kobi GREENSTEIN, Tsion EISENFELD, Netanel GOLDSTEIN
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Patent number: 11796729Abstract: An optical device includes a first waveguide, having parallel first and second faces and parallel third and fourth faces forming a rectangular cross-section, that guides light by four-fold internal reflection and is associated with a coupling-out configuration that couples light out of the first waveguide into a second waveguide. The first or second face is subdivided into first and second regions having different optical characteristics. The optical device also includes a coupling-in configuration having a surface that transmits light into the first waveguide. The surface is deployed in association with a portion of the third or fourth face adjoining the second region such that an edge associated with the surface trims an input collimated image in a first dimension, and a boundary between the first and second regions trims the input collimated image in a second dimension to produce a trimmed collimated image that advances by four-fold internal reflection.Type: GrantFiled: February 24, 2022Date of Patent: October 24, 2023Assignee: LUMUS LTD.Inventors: Tsion Eisenfeld, Yochay Danziger, Eitan Ronen, Ronen Chriki, Mordechai Gilo, Elad Sharlin
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Publication number: 20230314689Abstract: An optical system for directing image illumination injected at a coupling-in region to an eye-motion box for viewing by an eye of a user, including a light-guide optical element (LOE) formed from transparent material that includes: a first region containing a first set of planar, mutually-parallel, partially-reflecting surfaces having a first orientation; a second region containing a second set of planar, mutually-parallel, partially-reflecting surfaces having a second orientation non-parallel to the first orientation; a set of mutually-parallel major external surfaces extending across the first and second regions, and an optical retarder deployed between the first region and the second region so as to rotate a polarization of light deflected by the first set of partially-reflecting surfaces prior to reaching the second set of partially-reflecting surfaces.Type: ApplicationFiled: September 20, 2021Publication date: October 5, 2023Inventors: Ronen CHRIKI, Elad SHARLIN, Tsion EISENFELD, Shimon GRABARNIK
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Patent number: 11741861Abstract: In an embodiment, an apparatus is disclosed that includes at least one processor configured to determine a target portion of an eye motion box and to identify a facet of a light-guide optical element that is configured to direct a light beam comprising at least a portion of an image field of view toward the target portion of the eye motion box. The at least one processor is configured to identify a display region of an image generator that is configured to inject the light beam into the light-guide optical element at an angle that, in conjunction with the identified facet, is configured to direct the light beam toward the target portion of the eye motion box. The at least one processor is configured to selectively activate the identified facet and the identified display region to direct the light beam toward the target portion of the eye motion box.Type: GrantFiled: February 8, 2022Date of Patent: August 29, 2023Assignee: LUMUS LTD.Inventors: Shimon Grabarnik, Tsion Eisenfeld, Elad Sharlin