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公开(公告)号：US20210055218A1
公开(公告)日：2021-02-25
申请号：US17043842
申请日：2019-04-07
Applicant: Lumus Ltd.
Inventor： Chaim ALDAAG , Tzofia LAVI , Dror HERMONI , Jonathan GELBERG , Yosef LAVIAN , Netanel GOLDSTEIN , Elad SHARLIN , Elad LAVI , Kobi GREENSTEIN , Amir SHAPIRA , Mordechai GILO , Tsion EISENFELD
Abstract: Optical sample characterization facilitates measurement and testing such as transmittance or reflectance at any discrete angle in a full range of angles of light propagation through a coated glass plate having a higher than air index of refraction. A rotatable assembly includes a cylinder having a hollow, and a receptacle including the hollow. The receptacle also contains a fluid having a refractive index matching the refractive index of the cylinder and coated plate. An optical light beam is input normal to the surface of the cylinder, travels through the cylinder, then via the index matching fluid through the coating, the coated glass plate, the fluid, the other side of the cylinder, and is collected for analysis. Due at least in part to the index matching fluid surrounding the coated plate, the plate can be rotated through a full range of angles (±90°, etc.) for full range testing of the coating.
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公开(公告)号：US20180157057A1
公开(公告)日：2018-06-07
申请号：US15879459
申请日：2018-01-25
Applicant: LUMUS LTD.
Inventor： Jonathan GELBERG , Mordechai GILO , Aviad BAR MEIR , Aviv FROMMER
IPC: G02B27/28 , G03B21/00 , G03B21/20 , G02F1/1362 , G02B27/30
CPC classification number: G02B27/283 , G02B5/3025 , G02B5/3058 , G02B27/30 , G02F1/136277 , G02F2203/02 , G03B21/006 , G03B21/2006 , G03B21/2073
Abstract: An optical system (100) includes an image-collimating prism (102) having external surfaces which are associated with: a polarized source; reflective-display device (70); at least one light-wave collimating component (16) and a light-wave exit surface (20), respectively. A polarization-selective beam splitter configuration (10) is deployed within the prism (102) on a plane oblique to the light-wave entrance surface (8). The reflective-display device is illuminated by light reflected from the beam splitter configuration (10), and generates rotation of the polarization corresponding to bright regions of the image. An image from the reflective-display device (70) is selectively transmitted by the polarization-selective beam splitter configuration (10), is collimated by the collimating component (16), reflected from the polarization-selective beam splitter configuration (10) and is projected through the exit surface (20). In some implementations, an additional polarizer located at or near the exit surface helps to optimize extinction of unwanted illumination rays.
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公开(公告)号：US20250155611A1
公开(公告)日：2025-05-15
申请号：US19026493
申请日：2025-01-17
Applicant: Lumus Ltd.
Inventor： Yochay DANZIGER , Eitan RONEN , Jonathan GELBERG , Tsion EISENFELD , Amir SHAPIRA
Abstract: A near-eye display includes a light-guide optical element (LOE) (10) having first and second major external surfaces (11A, 11B) that are planar and mutually parallel. An image projector (2) introduces into the LOE illumination corresponding to an image so that the illumination propagates within said LOE by internal reflection at the major external surfaces. A coupling-out arrangement couples the illumination out of the LOE towards the eye of the observer. The coupling-out arrangement may be a set of mutually-parallel, partially-reflective surfaces (12A) deployed at an oblique angle within the LOE. Various arrangements for suppressing reflections of ambient light sources include obstructing baffles oriented so as to avoid reduction of peripheral field of view, various non-reflective coatings and various deployments of polarization filters.
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公开(公告)号：US20250085229A1
公开(公告)日：2025-03-13
申请号：US18957774
申请日：2024-11-24
Applicant: Lumus Ltd.
Inventor： Eitan RONEN , Eitan BAIBICH , Elad SHARLIN , Amir SHAPIRA , Jonathan GELBERG , Netanel GOLDSTEIN , Elad LAVI
Abstract: Optical sample characterization facilitates measurement and testing at any angle in a full range of angles of light propagation through an optical sample, such as a coated glass plate, having a higher than air index of refraction. A rotatable assembly includes a cylinder having a hollow, and a receptacle including the hollow. The receptacle also contains a fluid with a known refractive index. An optical light beam is input normal to the surface of the cylinder, travels through the cylinder, then via the fluid, to the optical sample, where light beam is transmitted and/or reflected, then exits the cylinder and is collected for analysis. Due at least in part to the fluid surrounding the optical sample, the optical sample can be rotated through a full range of angles (±90°, etc.) for full range testing of the optical sample.
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公开(公告)号：US20240263940A1
公开(公告)日：2024-08-08
申请号：US18579590
申请日：2022-07-26
Applicant: LUMUS LTD.
Inventor： Jonathan GELBERG , Elad SHARLIN , Eitan RONEN
IPC: G01B11/27
CPC classification number: G01B11/26 , G01B11/272 , G01M11/0242 , G01M11/35
Abstract: Disclosed herein is a method including: (i) providing a light transmissive sample including nominally parallel internal facets, which are about perpendicular to an external surface of the sample; (ii) providing an optical element having a refractive index about equal to that of the sample and including an external first surface and an external second surface acutely inclined relative thereto; (iii) positioning the second surface of the optical element adjacent to the first surface of the sample; (iv) impinging light beams on the first surface of the optical element, about normally thereto; (v) sensing light beams, which exit out of the sample following passage of the impinging light beams via the optical element, transmission thereof into the sample, reflection once off the internal facets, and exit out of the sample; and (vi) based on the sensed data, computing a deviation from parallelism between the internal facets.
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Patent Agency Ranking
公开(公告)号：US20240419000A1
公开(公告)日：2024-12-19
申请号：US18818684
申请日：2024-08-29
Applicant: Lumus Ltd.
Inventor： Jonathan GELBERG , Tsion EISENFELD
Abstract: A light-guide optical element (LOE) for simultaneous viewing, of a real scene and of a projected image introduced into the LOE, having a transparent block along which light conveying a projected image propagates by internal reflection, and a plurality of internal partially reflecting surfaces obliquely oriented and configured so as to couple-out a part of said light, wherein the reflectance of each of the partially reflecting surfaces is such that the total power of the light that is coupled out is less than one third of the total power of the light that is introduced into the LOE. In some embodiments, the light of the projected image is polarized and the reflectance of the partially reflecting surfaces for light polarized in an orthogonal orientation is substantially reduced. In some embodiments, the reflectance of the partially reflecting surfaces for light not reaching the viewer is substantially reduced.
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公开(公告)号：US20240411137A1
公开(公告)日：2024-12-12
申请号：US18702394
申请日：2022-10-18
Applicant: Lumus Ltd.
Inventor： Tsion EISENFELD , Yochay DANZIGER , Jonathan GELBERG , Shimon GRABARNIK
Abstract: An optical system includes a light-guide optical element (LOE) formed from transparent material and having parallel major external surfaces. A projector is configured to project illumination corresponding to a collimated image into the LOE via a reflective coupling-in configuration that includes an image injection surface coplanar with the first major external surface, a reflector surface obliquely angled to the major external surfaces, and a partially-reflecting surface parallel to the reflector surface. A first part of the intensity of the illumination of the collimated image is reflected by the partially-reflecting surface and a second part of the intensity of the illumination of the collimated image is reflected by the reflector surface and transmitted by the partially-reflecting surface. Both parts of the intensity contribute to image illumination coupled into the LOE so as to propagate within the LOE by internal reflection at the major external surfaces.
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公开(公告)号：US20210116367A1
公开(公告)日：2021-04-22
申请号：US17044390
申请日：2019-06-20
Applicant: Lumus Ltd.
Inventor： Jonathan GELBERG , Yuval RUBIN , Michael ADEL
Abstract: A system and method for measuring refractive index inhomogeneity between plates of a Lightguide Optical Element (LOE) uses an innovative measuring technique based on a shearing interferometric technique conventionally used to observe interference and test the collimation of light beams. Another feature of the current implementation is an innovative method for analyzing the characteristics of the generated interferogram to characterize discrepancies between adjacent plates in an LOE.
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公开(公告)号：US20240402401A1
公开(公告)日：2024-12-05
申请号：US18804246
申请日：2024-08-14
Applicant: Lumus Ltd.
Inventor： Yochay DANZIGER , Eitan RONEN , Jonathan GELBERG , Tsion EISENFELD , Amir SHAPIRA
Abstract: A near-eye display includes a light-guide optical element (LOE) (10) having first and second major external surfaces (11A, 11B) that are planar and mutually parallel. An image projector (2) introduces into the LOE illumination corresponding to an image so that the illumination propagates within said LOE by internal reflection at the major external surfaces. A coupling-out arrangement couples the illumination out of the LOE towards the eye of the observer. The coupling-out arrangement may be a set of mutually-parallel, partially-reflective surfaces (12A) deployed at an oblique angle within the LOE. Various arrangements for suppressing reflections of ambient light sources include obstructing baffles oriented so as to avoid reduction of peripheral field of view, various non-reflective coatings and various deployments of polarization filters.
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公开(公告)号：US20240369353A1
公开(公告)日：2024-11-07
申请号：US18770084
申请日：2024-07-11
Applicant: LUMUS LTD.
Inventor： Jonathan GELBERG , Elad SHARLIN , Eitan RONEN
IPC: G01B11/27
Abstract: Disclosed herein is a method for validating parallelism of internal facets of a sample. The method includes: (i) providing a sample including a light transmissive substrate and internal facets, nominally parallel and nominally inclined at an angle μnom relative to a flat surface of the sample; (ii) providing a prism having a substantially same refractive index as the substrate and including a flat, first surface and a flat, second surface, opposite to the first surface and inclined relative thereto at substantially the angle μnom; (iii) positioning the sample and the prism, such that the surface of the sample is parallel and adjacent to the second surface of the prism; (iv) projecting on the first surface of the prism, substantially normally thereto an incident light beam; (v) sensing light returned from the prism following reflection off the internal facets; and (vi) computing deviation from parallelism between the internal facets.
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