Patents by Inventor Uzi Efron
Uzi Efron 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: 20090040461Abstract: There is provided a low-vision aid device, including a scene-display imager producing a signal pattern composed of an array of pixels, a near IR illuminator for illuminating the retina of the eye with radiation for eye tracking, to be reflected from the retina of the eye, an eye-retina tracking imager, and an image transceiver device capable of providing both functions of eye imaging as well as image display by selectively rotating the polarization of individual pixels of the array of pixels of the signal pattern, to allow the transference of selected portions of the signal pattern to reach the retina of the eye.Type: ApplicationFiled: April 2, 2006Publication date: February 12, 2009Applicants: BEN GURION UNIV. OF THE NEGEV RESEA. & DEV. AUTH., A.Y.Y.T.-TECH. APPLICATIONS & DATA UPDATE LTD.Inventors: Uzi Efron, Yizhak David, Boris Apter, Nonel Thirer, Itzhak Baal-Zedaka
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Patent number: 7475984Abstract: A system in accord with the present invention includes a first optical lens having a first outer surface, a second outer surface, and an outer perimeter, an electro-active refractive matrix; and a conductor coupled to the electro-active matrix. An alternative system in accord with the present invention includes a frame, the frame having a lens support and a temple region; an optical lens coupled to the lens support, the optical lens including an electro-active refractive matrix; a controller coupled to the electro-active refractive matrix; and a range finder coupled to the controller. The present invention also includes a method of assembling an optical lens system that comprises placing an electro-active refractive matrix into a cavity of a first optical lens; and covering at least a portion of the electro-active refractive matrix with a second optical lens.Type: GrantFiled: February 22, 2005Date of Patent: January 13, 2009Assignee: PixelOptics Inc.Inventors: Ronald D. Blum, Dwight P. Duston, William Kokonaski, Joseph Thibodeau, Youval Katzman, Uzi Efron
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Patent number: 7194139Abstract: A method of image compression, comprising: providing image-data encoding light; transforming said light from an image space to a transform space utilizing an optical component; and converting said transformed light into electrical signals, which electrical signals represent a compressed representation of said image data.Type: GrantFiled: September 5, 1999Date of Patent: March 20, 2007Assignee: Lenslet Ltd.Inventors: Aviram Sariel, David Mendlovic, Uzi Efron, Ido Raveh, Gal Shabtay, Zeev Zalevsky, Uriel Levy, Naim Konforti, Amir Shemer, Dan Shklarsky, Nadav Cohen
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Publication number: 20050270481Abstract: A system in accord with the present invention includes a first optical lens having a first outer surface, a second outer surface, and an outer perimeter, an electro-active refractive matrix; and a conductor coupled to the electro-active matrix. An alternative system in accord with the present invention includes a frame, the frame having a lens support and a temple region; an optical lens coupled to the lens support, the optical lens including an electro-active refractive matrix ; a controller coupled to the electro-active refractive matrix; and a range finder coupled to the controller. The present invention also includes a method of assembling an optical lens system that comprises placing an electro-active refractive matrix into a cavity of a first optical lens; and covering at least a portion. of the electro-active refractive matrix with a second optical lens.Type: ApplicationFiled: February 22, 2005Publication date: December 8, 2005Inventors: Ronald Blum, Dwight Duston, William Kokonaski, Joseph Thibodeau, Youval Katzman, Uzi Efron
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Patent number: 6871951Abstract: A system in accord with the present invention includes a first optical lens having a first outer surface, a second outer surface, and an outer perimeter, an electro-active refractive matrix; and a conductor coupled to the electro-active matrix. An alternative system in accord with the present invention includes a frame, the frame having a lens support and a temple region; an optical lens coupled to the lens support, the optical lens including an electro-active refractive matrix; a controller coupled to the electro-active refractive matrix; and a range finder coupled to the controller. The present invention also includes a method of assembling an optical lens system that comprises placing an electro-active refractive matrix into a cavity of a first optical lens; and covering at least a portion of the electro-active refractive matrix with a second optical lens.Type: GrantFiled: January 16, 2002Date of Patent: March 29, 2005Assignee: E-Vision, LLCInventors: Ronald D. Blum, Dwight P. Duston, William Kokonaski, Joseph Thibodeau, Youval Katzman, Uzi Efron
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Publication number: 20040223113Abstract: An electro-active lens that may include first and second electro-active cells, the cells being adjacent to each other and, when in a resting state, oriented orthogonal to each other to reduce birefringence.Type: ApplicationFiled: June 9, 2004Publication date: November 11, 2004Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston, Youval Katzman, Daniel Katzman, Uzi Efron, Israel Grossinger, Gerald Meredith, Bernard Kippelen, David Mathine
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Publication number: 20030210377Abstract: An electro-active lens that may include first and second electro-active cells, the cells being adjacent to each other and, when in a resting state, oriented orthogonal to each other to reduce birefringence.Type: ApplicationFiled: October 4, 2002Publication date: November 13, 2003Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston, Youval Katzman, Daniel Katzman, Uzi Efron, Israel Grossinger, Gerald Meredith, Bernard Kippelen, David Mathine
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Patent number: 6491391Abstract: An electro-active spectacle lens is disclosed. The disclosed lens includes a first lens optic. The disclosed lens also includes a first electro-active zone positioned in a cooperative relationship with the first lens optic. In certain embodiments, the electro-active lens includes a range finder positioned in a cooperative relationship with the electro-active lens.Type: GrantFiled: June 23, 2000Date of Patent: December 10, 2002Assignee: E-Vision LLCInventors: Ronald D. Blum, Dwight P. Dustin, Youval Katzman, Israel Grossinger, Uzi Efron, Dan Katzman
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Publication number: 20020140899Abstract: A system in accord with the present invention includes a first optical lens having a first outer surface, a second outer surface, and an outer perimeter, an electro-active refractive matrix; and a conductor coupled to the electro-active matrix. An alternative system in accord with the present invention includes a frame, the frame having a lens support and a temple region; an optical lens coupled to the lens support, the optical lens including an electro-active refractive matrix; a controller coupled to the electro-active refractive matrix; and a range finder coupled to the controller. The present invention also includes a method of assembling an optical lens system that comprises placing an electro-active refractive matrix into a cavity of a first optical lens; and covering at least a portion of the electro-active refractive matrix with a second optical lens.Type: ApplicationFiled: January 16, 2002Publication date: October 3, 2002Inventors: Ronald D. Blum, Dwight P. Duston, William Kokonaski, Joseph Thibodeau, Youval Katzman, Uzi Efron
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Patent number: 5822127Abstract: A head-mounted display device (10) offers light weight, a low center of gravity, and low moments of inertia about the azimuthal and elevational axes of head movement. The display device (10) employs an angulated beam splitter mirror (16) disposed between a user's (22) eye (20) and an inner combiner surface (18a) of a visor (28). A projector (36) is carried laterally of the user's eye with a low center of gravity and a position close to the horizontal axis of elevational movement of the head. This projector (36) includes an image source (12) and an compact light-weight relay optics module (14) along with a projection fold mirror (30) disposed at eye level and laterally of the beam splitter mirror (16) to project image light to the beam splitter mirror (16). The beam splitter mirror (16) reflects the light onto the inner surface (18a) of the combiner (18) for reflection back through the beam splitter mirror (16) and to the user's eye (20).Type: GrantFiled: April 11, 1997Date of Patent: October 13, 1998Assignee: Hughes ElectronicsInventors: Chungte W. Chen, Uzi Efron, Arthur N. Chester
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Patent number: 5759447Abstract: An erasable optical memory is provided by an erasable bistable photoactive chromophore that is covalently bonded to a polymer microsphere. An azobenzene chromophore that is bonded to the microsphere by an oxygen or NH replacement of chlorine, or a CH double bond to N, is preferred. An array of such microspheres is encoded by applying radiation at a resonant wavelength to induce a conformational change in the chromophores for selected microspheres, and the encoded pattern is read out by detecting changes in either absorption or fluorescence.Type: GrantFiled: December 22, 1995Date of Patent: June 2, 1998Assignee: Hughes Electronics CorporationInventors: Uzi Efron, Chiung-Sheng Wu, Larry Raymond Dalton, Eli Wiener-Avnear
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Patent number: 5389788Abstract: An infrared (IR) radiation transducer integrates an IR detector array with a liquid crystal (LC) readout. The IR detector is preferably a pixelized bolometer array, but other detectors such as pyroelectric materials are possible. To modulate the LC in response to detected IR radiation, a modulating section is provided that includes a charge injection structure which injects electrical charge in response to the detected IR radiation, and a charge transfer structure that transfers the injected charge to the LC readout section. During its active phase the charge transfer layer is depleted of majority charge carriers, and the charge injection and transfer mechanism operates in a manner analogous to a bipolar transistor. A visible readout is obtained by directing readout light through the LC, where it is modulated in accordance with the detected IR image. The transducers are small and light weight enough to be incorporated into a pair of goggles, for which no separate cooling is required.Type: GrantFiled: December 13, 1993Date of Patent: February 14, 1995Assignees: Hughes Aircraft Company, The United States of America as represented by the Secretary of the DefenseInventors: Jan Grinberg, Raymond Balcerak, Chiung-Sheng Wu, Uzi Efron, Paul O. Braatz
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Patent number: 5227886Abstract: A combined optical imaging/display device employs a liquid crystal light valve (LCLV) with a charge coupled device (CCD) input, and a photosensitive CCD or charge injection device (CID) array for receiving an input image and developing a corresponding signal pattern. The signal pattern is applied as an input to the CCD after amplifying it and manipulating it as desired. The CCD and photosensitive array are provided on a common substrate; their cells may be arranged in alternating rows or in separate arrays. The invention is applicable to active vision enhancement goggles.Type: GrantFiled: February 19, 1991Date of Patent: July 13, 1993Assignee: Hughes Aircraft CompanyInventors: Uzi Efron, William Byles
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Patent number: 5081542Abstract: An eye protection device 10 comprising a liquid crystal light valve 20 for providing an image of a scene. The light valve images the field of view under observation in a spectral range which matches the human eye. It will automatically reject a laser threat by simply absorbing the energy therefrom in the photoconductive layer thereof. Thus, the invention 10 provides a broad spectrum, zero response time, angle and polarization independent, sensitive eye protection device having a fast recovery time, high extinction coefficient and a high damage threshold. Hence, the invention is expected to be of significant utility to personnel operating in hostile environments.Type: GrantFiled: December 12, 1989Date of Patent: January 14, 1992Assignee: Hughes Aircraft CompanyInventors: Uzi Efron, Shin-Tson Wu, Tsung-Yuan Hsu, Wayne Schoenmakers
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Patent number: 5051571Abstract: A cascaded adaptive optics system for correction of aberrations in a light beam. The system includes a plurality of spatial light modulators (SLMs) in a cascaded arrangement to provide an adaptive optics system characterized by wide range, rapid response, and high resolution. The spatial light modulators may be identical or have characteristics that are complementary in providing a combined output that advantageously corrects for aberrations. A conventional adaptive optics system such as a deformable mirror may be used as one or more of the SLMKs. Liquid crystal light valves (LCLVs) may be advantageously used as one or more of the SLMs in the invention. A single LCLV may be cascaded with itself in a multiple-pass configuration by means of suitable reflectors.Type: GrantFiled: December 2, 1986Date of Patent: September 24, 1991Assignee: Hughes Aircraft CompanyInventors: Wilbur P. Brown, Jr., Thomas R. O'Meara, David M. Pepper, Uzi Efron, Bernard H. Soffer
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Patent number: 5048935Abstract: Apparatus for compensating for inherent distortions in a modified liquid crystal light valve used in an integrated wavefront sensing and wavefront control system for laser optics. A main wavefront sensing and control system utilizes a liquid crystal light valve selected for response speed but having inherent surface non-linearities. A beam from an auxiliary laser is intermittently applied, while the main laser is blocked, to both the fast response LCLV of the main system and to a slower response LCLV of an associated correction system. The second LCLV system corrects for the non-linearities in the surface of the first LCLV and then maintains the stored correction signal for a decay interval which corresponds to several response times of the main LCLV, thus permitting the main LCLV system to perform fast correction of atmospheric aberrations in the laser beam wavefront unaffected by inherent surface non-linearities.Type: GrantFiled: December 24, 1986Date of Patent: September 17, 1991Assignee: Hughes Aircraft CompanyInventors: Uzi Efron, Bernard H. Soffer, Richard C. Lind, David M. Pepper, Thomas R. O'Meara
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Patent number: 4913531Abstract: A liquid crystal light valve is provided with a microgrid of grooves in the photoconductor surface to divide the photoconductor into high resolution pixels. The liquid crystals fill the grooves to seal them and contribute to a potential barrier at the grooves that prevents lateral charge migration between pixels. In a metal oxide semiconductor (MOS) embodiment an oxide layer extends over the pixels and partially overhangs the grooves. A metal matrix mirror is formed over the insulative layer, and extends into a portion of the grooves to shield the underlying silicon from photoactivation while maintaining an electrical isolation between pixels.Type: GrantFiled: September 7, 1988Date of Patent: April 3, 1990Assignee: Hughes Aircraft CompanyInventors: Uzi Efron, Murray S. Welkowsky, Norman W. Goodwin
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Patent number: 4893905Abstract: An optical light valve system 10 for providing an amplified phase conjugated replica S.sub.1 * of a potentially low intensity phase aberrated optical signal beam S.sub.1 is disclosed herein. The optical light valve system 10 of the present invention includes a reference beam source 17 for providing a coherent reference beam R having first and second components of first and second polarization states, respectively. Further included is a signal beam source 15 for providing a coherent signal beam S of the first polarization state. An improved optical light valve 20 phase conjugates the second component of the reference beam in response to the aberrated beam S.sub.1 *.Type: GrantFiled: June 10, 1988Date of Patent: January 16, 1990Assignee: Hughes Aircraft CompanyInventors: Uzi Efron, Yuri Owechko
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Patent number: 4881110Abstract: A double Schottky diode light valve (5) includes a liquid crystal (80) for locally modulating a beam (120) by polarization rotation to produce a modulated beam (121), and a photoconductor (40) located adjacent the liquid crystal (80) for receiving and absorbing a second beam (110). The photoconductor (40) controls the polarization responsively to the optical content of the second beam (110). The photoconductor (46) includes a semiconductor substrate and a pair of Schottky diodes (60/40, 30/40) disposed on opposing sides of the substrate. The absorption of the second beam (110) by the substrate (40) produces photogenerated carriers. The pair of Schottky diodes (60/40, 30/40) maintain the substrate (40) substantially depleted of such carriers and also reflects the modulated beam back through the liquid crystal.Type: GrantFiled: May 16, 1988Date of Patent: November 14, 1989Assignee: Hughes Aircraft CompanyInventors: Paul O. Braatz, Uzi Efron
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Patent number: H840Abstract: A single-Schottky liquid crystal is disclosed in which a series of Schottky contacts are made on one side of a photoconductor substrate by a metal matrix mirror, with a doped semiconductor back contact electrode on the other side of the substrate. The light valve offers several operational advantages over MOS devices, and is easier to fabricate than double-Schottky light valves. It can be operated either in an AC mode or, by doping the liquid crystal ions, in a DC mode.Type: GrantFiled: January 9, 1989Date of Patent: November 6, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Uzi Efron, Paul O. Braatz, Jan Grinberg