Patents by Inventor Peter P. Clark
Peter P. Clark 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: 11985784Abstract: A server information handling system is secured by a bezel that couples to an access location, such as an air vent at a front or rear face of a housing. The bezel includes a security structure having a lock and configured to couple directly at the front face or with a bezel extension at the rear face so that the server information handling system can use the same bezel with both a front face or rear face rack mount. The bezel has a lock integrated with the security structure, an air filter that fits over the security structure to filter air flowing into the housing, and a filter brace that captures the air filter by coupling to the security structure over the air filter. The filter brace attaches and detaches at the security structure when the security structure locks a server information handling system housing so that the air filter can be changed while the housing remains secure.Type: GrantFiled: October 27, 2021Date of Patent: May 14, 2024Assignee: Dell Products L.P.Inventors: Peter T. Clark, Amrita Sidhu Maguire, Richard W. Guzman, Sean P. O'Donnell, Matthew B. Gilbert, Georg Todtenbier, Oscar Coutinho, Yung-Chun Chen, Ming-Chiao Lee, Chi-Sung Chang
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Patent number: 9874774Abstract: Methods and apparatus for testing operation of a single or multiple tunable active optical device(s) operated by one or more driving electrodes are described. Test methods and apparatus are provided for device testing without necessarily requiring direct physical contact with the driving electrodes. Testing subjects devices to incident light along an optical path and to an external electric field applied to the device producing a dipolar charge distribution within the electrodes, causing the device to operate. The effect of device operation on incident light is optically sensed. The sensed effect is analyzed to identify device defects. Test methods and apparatus are provided for testing multiple unsingulated devices during fabrication employing a strip contact structure having contact strips connected to multiple devices and extending to wafer edges, such that singulating devices leaves portions of the strip contact structure exposed on device dice edges providing electrical contacts in use.Type: GrantFiled: August 4, 2015Date of Patent: January 23, 2018Assignee: LENSVECTOR INC.Inventors: Bahram Afshari, Karen Asatryan, Peter P Clark, Tigran Galstian, Michael J. Nystrom, Vladimir Presniakov, Sergei Yakovenko, Armen Zohrabyan
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Patent number: 9448456Abstract: A liquid crystal optical device has a layered structure with split liquid crystal layers having alignment surfaces that define in a liquid crystal material pre-tilt angles of opposite signs. Four liquid crystal layers can provide two directions of linear polarization. In the case of a lens, the device can be a gradient index lens, and the alignment surfaces can have a spatially uniform pre-tilt.Type: GrantFiled: October 8, 2013Date of Patent: September 20, 2016Assignee: LENSVECTOR, INC.Inventors: Karen Asatryan, Tigran Galstian, Aram Bagramyan, Vladimir Presniakov, Amir Tork, Armen Zohrabyan, Peter P. Clark
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Patent number: 9314148Abstract: A motionless adaptive focus stereoscopic scene capture apparatus employing tuneable liquid crystal lenses is provided. The apparatus includes at least two image sensors preferably fabricated as a monolithic stereo image capture component and at least two corresponding tuneable liquid crystal lenses preferably fabricated as a monolithic focus adjustment component. Using a variable focus tuneable liquid crystal lens at each aperture stop provides constant magnification focus control. Controlled spatial variance of a spatially variant electric field applied to the liquid crystal of each tuneable liquid crystal lens provides optical axis shift enabling registration between stereo images. A controller implements coupled auto-focusing methods employing multiple focus scores derived from at least two camera image sensors and providing multiple tuneable liquid crystal lens drive signals for synchronous focus acquisition of a three dimensional scene.Type: GrantFiled: December 5, 2011Date of Patent: April 19, 2016Assignee: LENSVECTOR, INC.Inventors: Tigran Galstian, Peter P Clark, Suresh Venkatraman
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Publication number: 20150346524Abstract: Methods and apparatus for testing operation of a single or multiple tunable active optical device(s) operated by one or more driving electrodes are described. Test methods and apparatus are provided for device testing without necessarily requiring direct physical contact with the driving electrodes. Testing subjects devices to incident light along an optical path and to an external electric field applied to the device producing a dipolar charge distribution within the electrodes, causing the device to operate. The effect of device operation on incident light is optically sensed. The sensed effect is analyzed to identify device defects. Test methods and apparatus are provided for testing multiple unsingulated devices during fabrication employing a strip contact structure having contact strips connected to multiple devices and extending to wafer edges, such that singulating devices leaves portions of the strip contact structure exposed on device dice edges providing electrical contacts in use.Type: ApplicationFiled: August 4, 2015Publication date: December 3, 2015Inventors: Bahram AFSHARI, Karen ASATRYAN, Peter P. CLARK, Tigran GALSTIAN, Michael J. NYSTROM, Vladimir PRESNIAKOV, Sergei YAKOVENKO, Armen ZOHRABYAN
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Patent number: 9161681Abstract: A motionless adaptive focus stereoscopic scene capture apparatus employing tunable liquid crystal lenses is provided. The apparatus includes at least two image sensors preferably fabricated as a monolithic stereo image capture component and at least two corresponding tunable liquid crystal lenses preferably fabricated as a monolithic focus adjustment component. Using a variable focus tunable liquid crystal lens at each aperture stop provides constant magnification focus control. Controlled spatial variance of a spatially variant electric field applied to the liquid crystal of each tunable liquid crystal lens provides optical axis shift enabling registration between stereo images. A controller implements coupled auto-focusing methods employing multiple focus scores derived from at least two camera image sensors and providing multiple tunable liquid crystal lens drive signals for synchronous focus acquisition of a three dimensional scene.Type: GrantFiled: December 5, 2011Date of Patent: October 20, 2015Assignee: LENSVECTOR, INC.Inventors: Tigran Galstian, Peter P Clark, Suresh Venkatraman
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Patent number: 9140920Abstract: Methods and apparatus for testing operation of a single or multiple tunable active optical device(s) operated by one or more driving electrodes are described Test methods and apparatus are provided for device testing without necessarily requiring direct physical contact with the driving electrodes Testing subjects devices to incident light along an optical path and to an external electric field applied to the device producing a dipolar charge distribution within the electrodes, causing the device to operate The effect of device operation on incident light is optically sensed The sensed effect is analyzed to identify device defects Test methods and apparatus are provided for testing multiple unsingulated devices during fabrication employing a strip contact structure having contact strips connected to multiple devices and extending to wafer edges, such that singulating devices leaves portions of the strip contact structure exposed on device dice edges providing electrical contacts in use.Type: GrantFiled: October 27, 2010Date of Patent: September 22, 2015Assignee: LensVector, Inc.Inventors: Bahram Afshari, Karen Asatryan, Peter P. Clark, Tigran Galstian, Michael J. Nystrom, Vladimir Presniakov, Sergei Yakovenko, Armen Zohrabyan
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Publication number: 20140036183Abstract: A liquid crystal optical device has a layered structure with split liquid crystal layers having alignment surfaces that define in a liquid crystal material pre-tilt angles of opposite signs. Four liquid crystal layers can provide two directions of linear polarization. In the case of a lens, the device can be a gradient index lens, and the alignment surfaces can have a spatially uniform pre-tilt.Type: ApplicationFiled: October 8, 2013Publication date: February 6, 2014Applicant: LENSVECTOR INC.Inventors: Karen ASATRYAN, Tigran GALSTIAN, Aram BAGRAMYAN, Vladimir PRESNIAKOV, Amir TORK, Armen ZOHRABYAN, Peter P. CLARK
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Patent number: 8629932Abstract: A camera module and method for focusing a tunable lens configured to continuously vary its optical power in response to a drive signal. A drive circuit generates the drive signal so that the tunable lens performs a continuous scan of its optical power. An image sensor is configured to acquire light images passing through the tunable lens, and to convert the light images to image signals during the continuous scan. A processor is configured to generate focus scores of the acquired light images using the image signals during the continuous scan. The processor is configured to determine from the focus scores a peak focus score achieved or achievable, and to instruct the drive circuit to adjust the drive signal so that the tunable lens settles at a value of the optical power that corresponds to the peak focus score.Type: GrantFiled: August 17, 2009Date of Patent: January 14, 2014Assignee: Lensvector, Inc.Inventors: Tigran Galstian, Peter P. Clark, Thomas Charles Antognini, Jeffrey James Parker, Derek Alexandre Proudian, Thomas Edwin Killick, Armen Zohrabyan
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Publication number: 20130033673Abstract: Methods and apparatus for testing operation of a single or multiple tunable active optical device(s) operated by one or more driving electrodes are described Test methods and apparatus are provided for device testing without necessarily requiring direct physical contact with the driving electrodes Testing subjects devices to incident light along an optical path and to an external electric field applied to the device producing a dipolar charge distribution within the electrodes, causing the device to operate The effect of device operation on incident light is optically sensed The sensed effect is analyzed to identify device defects Test methods and apparatus are provided for testing multiple unsingulated devices during fabrication employing a strip contact structure having contact strips connected to multiple devices and extending to wafer edges, such that singulating devices leaves portions of the strip contact structure exposed on device dice edges providing electrical contacts in use.Type: ApplicationFiled: October 27, 2010Publication date: February 7, 2013Applicant: LENSVECTOR, INC.Inventors: Bahram Afshari, Karen Asatryan, Peter P. Clark, Tigran Galstian, Michael J. Nystrom, Vladimir Presniakov, Sergei Yakovenko, Armen Zohrabyan
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Publication number: 20120200764Abstract: A focus free camera module uses fixed lenses within a housing that are combined with an electrically controllable active optical element, such as a tunable liquid crystal lens. The fixed lenses provide a desired amount of optical power, but the manufacturing tolerances of the module are insufficient to ensure a proper focus of an image on an image sensor. The active optical element is therefore used to compensate for any variations in the optical power to achieve the desired focus. To ensure an effective compensation, the module may be constructed so that, when the variation in optical power due to manufacturing tolerances is at a maximum, the desired focus is achieved when the active optical element is at zero optical power. All other variations may then be compensated by adjusting the active optical element to increase its optical power.Type: ApplicationFiled: May 3, 2010Publication date: August 9, 2012Applicant: LENSVECTOR INC.Inventors: Bahram Afshari, John Toor, Peter P Clark, Samuel Wennyann Ho
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Publication number: 20120140037Abstract: A motionless adaptive focus stereoscopic scene capture apparatus employing tunable liquid crystal lenses is provided. The apparatus includes at least two image sensors preferably fabricated as a monolithic stereo image capture component and at least two corresponding tunable liquid crystal lenses preferably fabricated as a monolithic focus adjustment component. Using a variable focus tunable liquid crystal lens at each aperture stop provides constant magnification focus control. Controlled spatial variance of a spatially variant electric field applied to the liquid crystal of each tunable liquid crystal lens provides optical axis shift enabling registration between stereo images. A controller implements coupled auto-focusing methods employing multiple focus scores derived from at least two camera image sensors and providing multiple tunable liquid crystal lens drive signals for synchronous focus acquisition of a three dimensional scene.Type: ApplicationFiled: December 5, 2011Publication date: June 7, 2012Applicant: LENSVECTOR, INC.Inventors: Tigran GALSTIAN, Peter P. CLARK, Suresh VENKATRAMAN
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Publication number: 20120140044Abstract: A motionless adaptive focus stereoscopic scene capture apparatus employing tuneable liquid crystal lenses is provided. The apparatus includes at least two image sensors preferably fabricated as a monolithic stereo image capture component and at least two corresponding tuneable liquid crystal lenses preferably fabricated as a monolithic focus adjustment component. Using a variable focus tuneable liquid crystal lens at each aperture stop provides constant magnification focus control. Controlled spatial variance of a spatially variant electric field applied to the liquid crystal of each tuneable liquid crystal lens provides optical axis shift enabling registration between stereo images. A controller implements coupled auto-focusing methods employing multiple focus scores derived from at least two camera image sensors and providing multiple tuneable liquid crystal lens drive signals for synchronous focus acquisition of a three dimensional scene.Type: ApplicationFiled: December 5, 2011Publication date: June 7, 2012Applicant: LENSVECTOR, INC.Inventors: Tigran GALSTIAN, Peter P. CLARK, Suresh VENKATRAMAN
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Publication number: 20110090415Abstract: A liquid crystal optical device has a layered structure with split liquid crystal layers having alignment surfaces that define in a liquid crystal material pre-tilt angles of opposite signs. Four liquid crystal layers can provide two directions of linear polarization. In the case of a lens, the device can be a gradient index lens, and the alignment surfaces can have a spatially uniform pre-tilt.Type: ApplicationFiled: June 5, 2009Publication date: April 21, 2011Applicant: LENSVECTOR INC.Inventors: Karen Asatryan, Tigran Galstian, Aram Bagramyan, Vladimir Presniakov, Amir Tork, Armen Zohrabyan, Peter P. Clark
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Publication number: 20100039532Abstract: A camera module and method for focusing a tunable lens configured to continuously vary its optical power in response to a drive signal. A drive circuit generates the drive signal so that the tunable lens performs a continuous scan of its optical power. An image sensor is configured to acquire light images passing through the tunable lens, and to convert the light images to image signals during the continuous scan. A processor is configured to generate focus scores of the acquired light images using the image signals during the continuous scan. The processor is configured to determine from the focus scores a peak focus score achieved or achievable, and to instruct the drive circuit to adjust the drive signal so that the tunable lens settles at a value of the optical power that corresponds to the peak focus score.Type: ApplicationFiled: August 17, 2009Publication date: February 18, 2010Inventors: Tigran Galstian, Peter P. Clark, Thomas Charles Antognini, Jeffrey James Parker, Derek Alexandre Proudian, Thomas Edwin Killick, Armen Zohrabyan
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Patent number: 7477461Abstract: The present invention is a compact lens system for use as a wide-field photographic objective with small format digital image sensors having a pixel dimension less than 0.010 mm. The f-number of the lens system is 2.9740, and the effective focal length of the system is 3.85 mm. The full angular field of view of the lens system is 61 degrees, and the chief ray incidence angles on the image plane are less than 18 degrees. The system comprises three plastic lenses, each having two aspheric surfaces. At least one of the aspheric surfaces in the system is coated with a multilayer infrared cut-off filter for blocking infrared wavelengths from the image sensors. The lens system has a reduced sensitivity to manufacturing tolerances, particularly lateral misalignment of optical elements and surfaces.Type: GrantFiled: December 22, 2006Date of Patent: January 13, 2009Assignee: Flextronics AP, LLCInventors: Jane Bareau, Peter P. Clark
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Publication number: 20080165430Abstract: The present invention is a compact lens system for use as a wide-field photographic objective with small format digital image sensors having a pixel dimension less than 0.010 mm. The f-number of the lens system is 2.9740, and the effective focal length of the system is 3.85 mm. The full angular field of view of the lens system is 61 degrees, and the chief ray incidence angles on the image plane are less than 18 degrees. The system comprises three plastic lenses, each having two aspheric surfaces. At least one of the aspheric surfaces in the system is coated with a multilayer infrared cut-off filter for blocking infrared wavelengths from the image sensors. The lens system has a reduced sensitivity to manufacturing tolerances, particularly lateral misalignment of optical elements and surfaces.Type: ApplicationFiled: December 22, 2006Publication date: July 10, 2008Inventors: Jane Bareau, Peter P. Clark
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Patent number: 6643390Abstract: A compact, low-cost finger imager, to be used for enrolling and recognizing individuals based upon their finger ridge patterns. The optical system employs viewing beyond the critical angle and darkfield illumination for maximum image contrast. The optical system is afocal and telecentric, achieving corrected distortion with oblique viewing.Type: GrantFiled: April 19, 2000Date of Patent: November 4, 2003Assignee: Polaroid CorporationInventors: Peter P. Clark, Douglas S. Goodman, William T. Plummer
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Patent number: 6104533Abstract: An optical viewfinder system comprising two optical elements, and a field stop or a reticle, to provide an image of a scene to a viewer, and further comprising a diffractive optical element to provide a clear, stationary image of the field stop or reticle to the viewer.Type: GrantFiled: September 16, 1998Date of Patent: August 15, 2000Assignee: Polaroid CorporationInventors: Peter P. Clark, William T. Plummer
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Patent number: 6061372Abstract: Disclosed is a two-level current driver suitable for driving a semiconductor laser for printing applications, the laser driver including a primary power source for producing a first current pulse of amplitude I.sub.1 and of duration T.sub.2, a secondary power source for producing a second current pulse of amplitude I.sub.2 and of duration T.sub.1, means for combining the outputs of the power sources, and sensing means for detecting the current pulse output from the primary power source.Type: GrantFiled: June 30, 1998Date of Patent: May 9, 2000Assignee: Polaroid CorporationInventors: William T. Plummer, Marc Thompson, Douglas S. Goodman, Peter P. Clark