Patents by Inventor Paulo E. X. Silveira
Paulo E. X. Silveira 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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Patent number: 8426789Abstract: In an embodiment, a method forms a lens with wavefront coding. The method includes positioning a lens in a mold; and curing material onto a surface of the lens to form an aspheric surface of the lens with wavefront coding. In another embodiment, a system for fabricating and evaluating a modified lens includes a collar for holding an initial lens, the initial lens having a front surface and a rear surface, a pin having a surface for molding a moldable material onto the front surface of the initial lens, to form the modified lens, an image forming arrangement; and a test object to be imaged by the modified lens and the image forming arrangement.Type: GrantFiled: July 12, 2011Date of Patent: April 23, 2013Assignee: OmniVision Technologies, Inc.Inventors: Edward R. Dowski, Jr., Paulo E. X. Silveira, Robert H. Cormack, Kenneth Scott Kubala
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Patent number: 8398871Abstract: A method for designing a first optical filter, exhibiting a first filter performance satisfying a first preset criterion, and a second optical filter, exhibiting a second filter performance satisfying a second preset criterion, includes providing initial first and second filter designs for the first and second optical filters, respectively, as first and second ordered stacks of layers, respectively. A pair of layers, including a first layer, characterized by a first thickness, and a second layer, characterized by a second thickness, is selected from the first and second ordered stacks of layers. The first thickness is constrained to a first constrained thickness that is a positive integer multiple of the second thickness to yield a constrained first filter design. A predicted performance of the constrained first filter design is determined and compared with the first preset criterion for one of accepting and rejecting the constrained first filter design.Type: GrantFiled: April 25, 2008Date of Patent: March 19, 2013Assignee: OmniVision Technologies, Inc.Inventors: Lu Gao, Gary Duerksen, Paulo E. X. Silveira
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Publication number: 20120242814Abstract: In one aspect, a method includes providing a lens substrate having an array of lenses. The lens substrate includes an overflow region next to each lens of the array. Each overflow region includes an overflow lens material. The method also includes separating the lens substrate into a plurality of smaller lens substrates. Each of the smaller lens substrates has one of the single lens and the plurality of stacked lenses. Separating the lens substrate into the smaller lens substrates may include removing or substantially removing the overflow regions. In one aspect, the method may be performed as a method of making a miniature camera module. Other methods are also described, as are miniature camera modules.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventors: Kenneth Kubala, Paulo E. X. Silveira, Satoru Tachihara
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Publication number: 20120200671Abstract: An optical system for capturing three-dimensional images of a three-dimensional object is provided. The optical system includes a projector for structured illumination of the object. The projector includes a light source, a grid mask positioned between the light source and the object for structured illumination of the object, and a first Wavefront Coding (WFC) element having a phase modulating mask positioned between the grid mask and the object to receive patterned light from the light source through the grid mask. The first WFC element is constructed and arranged such that a point spread function of the projector is substantially invariant over a wider range of depth of field of the grid mask than a point spread function of the projector without the first WFC element.Type: ApplicationFiled: February 9, 2011Publication date: August 9, 2012Inventors: Paulo E.X. Silveira, Dennis J. Gallagher, Lu Gao
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Publication number: 20120105575Abstract: A system and method for providing an optical device with a variable extended depth-of-field (EDOF). The optical device includes an optically transparent liquid crystal layer, an optically transparent phase mask, optically aligned with the liquid crystal layer and separated therefrom by an optically transparent substrate, an optically transparent index-matching layer, disposed adjacent to one surface of the phase mask, and having a refractive index substantially matching that of the phase mask; and a pair of electrodes for generating an electric field acting on said liquid crystal layer to change the depth of field of the imaging system in proportion to the amplitude of a signal applied to the electrodes.Type: ApplicationFiled: November 1, 2010Publication date: May 3, 2012Inventor: Paulo E.X. Silveira
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Publication number: 20120086949Abstract: A multilayer optical device includes an arrangement, on a substrate, of a first layer, a second layer, and a space therebetween. The second layer is a thin-film. The arrangement of the first and second layers and the space therebetween produces transmitted, reflected, or dispersed spectrally modified electromagnetic energy from electromagnetic energy incident upon the arrangement. An optical function of the device is dependent at least in part on interference effects. An optical detector system includes a similar multilayer optical device. The space within the device is in fluid communication with structures for receiving a fluid such that the device operates in a first or second mode depending on absence or presence of the fluid within the space. The system includes a detector for receiving the modified electromagnetic energy, and a controller in fluid communication with the space that establishes the absence or presence of the fluid in the space.Type: ApplicationFiled: October 7, 2010Publication date: April 12, 2012Inventors: Lu Gao, Paulo E.X. Silveira, Mark Meloni
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Patent number: 8144208Abstract: A method for generating an output image of a scene is disclosed. A detector of a task-based imaging system includes a plurality of pixels, and the scene includes at least one object located at a given object distance within a range of object distances between the object and the imaging system. The method includes capturing a high resolution image of the scene, converting the high resolution image into an image spectrum of the scene, determining a defocused optical transfer function (OTF) of the imaging system over the range of object distances and determining a pixel modulation transfer function (MTF) over the plurality of pixels. The method also includes multiplying the image spectrum with the OTF and the MTF to generate a modified image spectrum of the scene, converting the modified image spectrum into a modified image of the scene, and generating the output image from the modified image.Type: GrantFiled: July 2, 2010Date of Patent: March 27, 2012Assignee: OmniVision Technologies, Inc.Inventors: Paulo E. X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, Jr.
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Publication number: 20110268868Abstract: In an embodiment, a method forms a lens with wavefront coding. The method includes positioning a lens in a mold; and curing material onto a surface of the lens to form an aspheric surface of the lens with wavefront coding. In another embodiment, a system for fabricating and evaluating a modified lens includes a collar for holding an initial lens, the initial lens having a front surface and a rear surface, a pin having a surface for molding a moldable material onto the front surface of the initial lens, to form the modified lens, an image forming arrangement; and a test object to be imaged by the modified lens and the image forming arrangement.Type: ApplicationFiled: July 12, 2011Publication date: November 3, 2011Inventors: Edward R. Dowski, JR., Paulo E.X. Silveira, Robert H. Cormack, Kenneth Scott Kubala
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Publication number: 20110176708Abstract: A task-based imaging system for obtaining data regarding a scene for use in a task includes an image data capturing arrangement for (a) imaging a wavefront of electromagnetic energy from the scene to an intermediate image over a range of spatial frequencies, (b) modifying phase of the wavefront, (c) detecting the intermediate image, and (d) generating image data over the range of spatial frequencies. The task-based imaging system also includes an image data processing arrangement for processing the image data and performing the task. The image data capturing and image data processing arrangements cooperate so that signal-to-noise ratio (SNR) of the task-based imaging system is greater than SNR of the task-based imaging system without phase modification of the wavefront over the range of spatial frequencies.Type: ApplicationFiled: April 1, 2011Publication date: July 21, 2011Inventors: Paulo E.X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, JR.
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Patent number: 7944467Abstract: A task-based imaging system for obtaining data regarding a scene for use in a task includes an image data capturing arrangement for (a) imaging a wavefront of electromagnetic energy from the scene to an intermediate image over a range of spatial frequencies, (b) modifying phase of the wavefront, (c) detecting the intermediate image, and (d) generating image data over the range of spatial frequencies. The task-based imaging system also includes an image data processing arrangement for processing the image data and performing the task. The image data capturing and image data processing arrangements cooperate so that signal-to-noise ratio (SNR) of the task-based imaging system is greater than SNR of the task-based imaging system without phase modification of the wavefront over the range of spatial frequencies.Type: GrantFiled: September 19, 2006Date of Patent: May 17, 2011Assignee: OmniVision Technologies, Inc.Inventors: Paulo E. X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, Jr.
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Publication number: 20100326955Abstract: A method for designing a first optical filter, exhibiting a first filter performance satisfying a first preset criterion, and a second optical filter, exhibiting a second filter performance satisfying a second preset criterion, includes providing initial first and second filter designs for the first and second optical filters, respectively, as first and second ordered stacks of layers, respectively. A pair of layers, including a first layer, characterized by a first thickness, and a second layer, characterized by a second thickness, is selected from the first and second ordered stacks of layers. The first thickness is constrained to a first constrained thickness that is a positive integer multiple of the second thickness to yield a constrained first filter design. A predicted performance of the constrained first filter design is determined and compared with the first preset criterion for one of accepting and rejecting the constrained first filter design.Type: ApplicationFiled: April 25, 2008Publication date: December 30, 2010Inventors: Lu Gao, Gary Duerksen, Paulo E.X. Silveira
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Publication number: 20100278390Abstract: A task-based imaging system for obtaining data regarding a scene for use in a task includes an image data capturing arrangement for (a) imaging a wavefront of electromagnetic energy from the scene to an intermediate image over a range of spatial frequencies, (b) modifying phase of the wavefront, (c) detecting the intermediate image, and (d) generating image data over the range of spatial frequencies. The task-based imaging system also includes an image data processing arrangement for processing the image data and performing the task. The image data capturing and image data processing arrangements cooperate so that signal-to-noise ratio (SNR) of the task-based imaging system is greater than SNR of the task-based imaging system without phase modification of the wavefront over the range of spatial frequencies.Type: ApplicationFiled: September 19, 2006Publication date: November 4, 2010Inventors: Paulo E.X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, JR.
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Publication number: 20100272327Abstract: A method for generating an output image of a scene is disclosed. A detector of a task-based imaging system includes a plurality of pixels, and the scene includes at least one object located at a given object distance within a range of object distances between the object and the imaging system. The method includes capturing a high resolution image of the scene, converting the high resolution image into an image spectrum of the scene, determining a defocused optical transfer function (OTF) of the imaging system over the range of object distances and determining a pixel modulation transfer function (MTF) over the plurality of pixels. The method also includes multiplying the image spectrum with the OTF and the MTF to generate a modified image spectrum of the scene, converting the modified image spectrum into a modified image of the scene, and generating the output image from the modified image.Type: ApplicationFiled: July 2, 2010Publication date: October 28, 2010Inventors: Paulo E.X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, JR.
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Publication number: 20100165134Abstract: Arrayed imaging systems include an array of detectors formed with a common base and a first array of layered optical elements, each one of the layered optical elements being optically connected with a detector in the array of detectors.Type: ApplicationFiled: April 17, 2007Publication date: July 1, 2010Inventors: Edward R. Dowski, JR., Paulo E.X. Silveira, George C. Barnes, IV, Vladislav V. Chumachenko, Dennis W. Dobbs, Regis S. Fan, Gregory E. Johnson, Mondrag Scepanovic, Satoru Tachihara, Christopher J. Linnen, Inga Tamayo, Donald Combs, Howard E. Rhodes, James He, John J. Mader, Goran M. Rauker, Kenneth Kubala, Mark Meloni, Brian Schwartz, Robert Commack, Michael Hepp, Kenneth Ashley Macon, Gary L. Duerksen
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Patent number: 7652685Abstract: An iris image capture device includes an optical arrangement that utilizes Wavefront Coding phase modifications to produce an optical image of a user iris and a detector for detecting the optical iris image and for converting the optical iris image into an electronic data signal. The iris image capture device also includes an image processor configured for processing the electronic data signal from the detector to reverse the Wavefront Coding phase modifications and to produce an electronic iris image of the user iris.Type: GrantFiled: September 13, 2005Date of Patent: January 26, 2010Assignee: OmniVision CDM Optics, Inc.Inventors: Hans Brandon Wach, Ramkumar Narayanswamy, Paulo E. X. Silveira, Robert H. Cormack
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Patent number: 7461092Abstract: System and method for content-addressable holographic data storage, primarily optimized with respect to search performance. A structured representation of original data, such as represented by metadata, is provided and stored in a holographic data storage medium on which a search can be performed using a holographic correlator. Phase encoding of both data storage and search pages provides improvement of correlator system signal to noise ratio and dynamic range. Heterodyne detection is also used to provide amplification to a plurality of correlation signals by modulation thereof by a plurality of reference beams. In another aspect, increase in the storage density of the holographic data storage medium and the throughput of a holographic correlator is achieved by employing a content-addressable storage scheme, using a priori knowledge of content provided by metadata to organize data according to a selectable content relationship and store related data as a contiguous cluster.Type: GrantFiled: September 12, 2005Date of Patent: December 2, 2008Assignee: Storage Technology CorporationInventors: Christophe Sigel, Michael L. Leonhardt, William Lynch, Paulo E. X. Silveira
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Patent number: 7453653Abstract: Low height imaging systems may include one or more optical channels and a detector array. Each of the optical channels may be associated with one or more detectors of the array, have one or more optical components and a restrictive ray corrector, and be configured to direct steeper incident angle field rays onto the detectors. Alternatively, each of the optical channels may be associated with at least one detector, and have an aspheric GRIN lens. Another low height imaging system has an array of detectors and a GRIN lens having a surface with wavefront coding and configured to direct steeper incident angle field rays onto more than one of the detectors. One method forms a lens with wavefront coding. The method includes positioning a lens in a mold; and curing material onto a surface of the lens to form an aspheric surface of the lens with wavefront coding.Type: GrantFiled: September 14, 2005Date of Patent: November 18, 2008Assignee: OmniVision CDM Optics, Inc.Inventors: Edward Raymond Dowski, Jr., Kenneth Scott Kubala, Robert H. Cormack, Paulo E. X. Silveira
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Publication number: 20080203276Abstract: In an embodiment, a low height imaging system has: one or more optical channels and a detector array, each of the optical channels (a) associated with at least one detector of the array, (b) having one or more optical components and a restrictive ray corrector, and (c) configured to direct steeper incident angle field rays onto the at least one detector.Type: ApplicationFiled: September 14, 2005Publication date: August 28, 2008Inventors: Edward R. Dowski, Paulo E.X. Silveira, Robert H. Cormack, Kenneth Scott Kubala
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Patent number: 7349594Abstract: Bidirectional wavelength cross connects include a plurality of ports, each configured to receive an input optical signals, each input optical signal having a plurality of spectral bands. At least one of the plurality of ports is disposed to simultaneously transmit an output optical signal having at least one of the spectral bands. A plurality of wavelength routing elements are configured to selectively route input optical signal spectral bands to output optical signals.Type: GrantFiled: November 30, 2006Date of Patent: March 25, 2008Assignee: Altera CorporationInventors: Edward J. Bortolini, Dirk Barthel, Robert T. Weverka, Samuel Paul Weaver, Paulo E. X. Silveira
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Patent number: 7337168Abstract: System and method for content-addressable search of holographically stored data primarily optimized with respect to search performance. A search is performed, by a holographic correlator system, on a structured representation of original data, stored in a holographic data storage medium. In a first aspect, orthogonal phase encoding of both data storage and search pages provides improvement of correlator system signal to noise ratio and dynamic range. In a second aspect, correlator incorporates heterodyne detection of a plurality of correlation signals, obtained by modulation and amplification thereof by a plurality of frequency-shifted reference beams. In a third aspect, the invention provides a method whereby multiple searches can simultaneously interrogate a single data storage location.Type: GrantFiled: September 12, 2005Date of Patent: February 26, 2008Assignee: Storgae Technology CorporationInventors: Christophe Sigel, Michael L. Leonhardt, William Lynch, Paulo E. X. Silveira