Patents Examined by Christina Y. Leung
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Patent number: 7672592Abstract: An optical transmitter system supplies a plurality of different wavelength optical radiation components to a transmission element which, in operation, is connected to the transmitter system for conveying the different wavelength radiation components to a respective receiver. The supply of the wavelength components is interrupted, preferably in response to a loss of the wavelength components at the respective receiver. A timer provides respective restart times which differ one to another for the wavelength radiation components. The supply of the wavelength components is restarted, following an interruption, at the respective restart times provided by the timer.Type: GrantFiled: August 25, 2008Date of Patent: March 2, 2010Assignee: Ericsson ABInventors: Andrew James Barker, Philip Andrew Arnold
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Patent number: 7660526Abstract: At a WDM add/drop node of an optical fiber, an add/drop multiplexer system with opto-electric components in the through channel path has an optical switch connected in parallel with an add/drop multiplexer. Upon a power loss to the add/drop multiplexer, the optical switch bypasses the add/drop multiplexer so that WDM channel signals pass through the WDM add/drop node without interference from the unpowered add/drop multiplexer. Loss of through channels at the node is prevented. Upon a return of power, the optical switch reroutes the WDM signals on the optical fiber to the add/drop multiplexer but after the add/drop multiplexer is fully operational.Type: GrantFiled: November 12, 2004Date of Patent: February 9, 2010Assignee: Cisco Technology, Inc.Inventors: Mauro Rudi Casanova, Lorenzo Ghioni, Andrea Marchio
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Patent number: 7653312Abstract: The present invention is a method of transmitting data of different bit rates in a simple manner and, if positive minimal multiples whose multiple operation values on the bit time lengths 1/Ai for a plurality of communication bit rates Ai become common are minimal multiples ai respectively, an optical line terminal constitutes a time division multiplex signal composed of a first data area having a bit rate Ai/ai and including frame synchronization information and a second data area in which packets addressed to each optical network unit of the bit rate Ai are time division multiplexed, and transmits the time division multiplex signal to a plurality of optical network units via a branching/multiplexing means.Type: GrantFiled: April 19, 2007Date of Patent: January 26, 2010Assignee: Fujitsu LimitedInventor: Kazuyuki Mori
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Patent number: 7639946Abstract: A distribution node for an optical network is provided that includes an integrated filter module comprising a first thin-film and a second thin-film coupled to a common substrate and operable to receive a first downstream signal at the substrate comprising at least traffic in a first wavelength and a second wavelength, transmit the traffic in the first wavelength from the first thin-film to a first plurality of downstream terminals, reflect the traffic in the second wavelength to the second thin-film, and transmit at least the traffic in the second wavelength from the second thin-film to a second plurality of downstream terminals. A traffic distributor is operable to receive a second downstream signal comprising at least traffic in a third wavelength and forward the traffic in the third wavelength to the common substrate for distribution to the first plurality and second plurality of downstream terminals.Type: GrantFiled: January 4, 2007Date of Patent: December 29, 2009Assignee: Fujitsu LimitedInventor: Martin Bouda
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Patent number: 7639954Abstract: A modulation driver for delivering an output modulation current for driving an optical source of an optical transmitter, the output modulation current comprises a first modulation current region characterised with a first temperature gradient and a second modulation current region characterised with a second temperature gradient, said first modulation current region and said second modulation region being for delivering modulation current at a first temperature range and a second temperature range, temperatures of said second temperature being higher than temperatures of said first temperature range, said second temperature gradient being larger than said first temperature gradient.Type: GrantFiled: October 11, 2005Date of Patent: December 29, 2009Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Kut Hing Lam, Yu Wing Choi, Torsten Wipiejewski
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Patent number: 7623787Abstract: One of two optical fibers connecting communication stations is used for transmitting multiple wavelength light supplied from a multiple wavelength light source supply apparatus, and the other for a bidirectional communication using optical signals of respective wavelengths generated from the multiple wavelength light. Alternatively, a transmission of multiple wavelength light and a bidirectional communication using the optical signals are enabled by only one optical fiber.Type: GrantFiled: September 30, 2005Date of Patent: November 24, 2009Assignee: Fujitsu LimitedInventor: Futoshi Izumi
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Patent number: 7613391Abstract: An optical network system is provided which has a signal protection function and is able to be constructed of communication nodes manufactured at low costs. An optical signal transceiver has at least one optical signal transmitting device and at least one optical signal receiving device to transmit and receive an optical signal between nodes facing each other. A switching device, when no failure has occurred in the optical signal transmitting communication line and optical signal receiving communication line, transmits an optical signal from the optical signal transmitting device to an optical signal transmitting communication line and an optical signal having been received from the optical signal receiving communication line to an optical signal receiving device.Type: GrantFiled: July 17, 2003Date of Patent: November 3, 2009Assignee: NEC CorporationInventor: Akio Tajima
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Patent number: 7609979Abstract: A method and system of coherent detection of optical signals. The system utilizes a digital signal processor to recover an incoming optical signal. The system employs a local oscillator, which does not need to be phase locked to the signal. The signal may be consistently recovered, even when the polarization state varies over time. Additionally, the signal may be recovered when it comprises two channels of the same wavelength that are polarization multiplexed together. In addition, any impairment to the signal may be reversed or eliminated.Type: GrantFiled: November 28, 2008Date of Patent: October 27, 2009Inventor: Michael George Taylor
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Patent number: 7609976Abstract: A method and system for ultra-high bit rate fiber-optic communications (e.g., 160 Gb/s) utilize a phase-correlated modulation format where phases of bits in adjacent four-bit groups in transmitted optical pulse trains are altered by ? (or 180°).Type: GrantFiled: September 29, 2005Date of Patent: October 27, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Xiang Liu, Lothar Benedict Erhard Josef Moeller, Yikai Su, Chongjin Xie
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Patent number: RE41063Abstract: An optical signaling header technique applicable to optical networks wherein packet routing information is embedded in the same channel or wavelength as the data payload so that both the header and data payload propagate through network elements with the same path and the associated delays. The technique effects survivability and security of the optical networks by encompassing conventional electronic security with an optical security layer by generating replicated versions of the input data payload at the input node, and the transmission of each of the replicated versions over a corresponding one of the plurality of links. Moreover, each of the links is composed of multiple wavelengths to propagate optical signals or optical packets, and each of the replicated versions of the data payload may be propagated over a selected one of the wavelengths in each corresponding one of the plurality of links.Type: GrantFiled: May 2, 2008Date of Patent: December 29, 2009Assignee: The Regents of the University of CaliforniaInventors: Gee-Kung Chang, Arshad Chowdhury, Georgios Ellinas
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Patent number: RE45592Abstract: The present invention is directed to a photographing lens containing, in order from an object side: a first lens having a positive refractive power and a convex surface facing the object side; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power and at least one aspheric surface, the photographing lens satisfying the following conditional expressions: L T f ? 1.2 0.5 ? f 3 f ? 1.0 where LT denotes the distance on the optical axis between the object side of the first lens and the image side of the fourth lens; f denotes the total focal length of the photographing lens; and f3 denotes the focal length of the third lens.Type: GrantFiled: September 16, 2014Date of Patent: June 30, 2015Assignee: Samsung Electronics Co., Ltd.Inventor: Young-Woo Park
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Patent number: RE45726Abstract: A reflective decoding device is provided for use in decoding an encoded image comprising a latent image encoded using at least one encoding parameter. The device comprises a substrate with a reflective surface portion having a surface topography comprising a predetermined pattern of topographical features. The predetermined pattern is configured with at least one geometric characteristic corresponding to the at least one encoding parameter so that placement of a light-transmissive sheet having the encoded image formed thereon over the predetermined pattern of topographical features allows the latent image to be viewed.Type: GrantFiled: October 25, 2012Date of Patent: October 6, 2015Assignee: Graphic Security Systems CorporationInventors: Alfred V Alasia, Alfred J. Alasia, Thomas C. Alasia, Slobodan Cvetkovic
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Patent number: RE45765Abstract: An image pickup optical lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power, the third lens element with refractive power, the fourth lens element with positive or negative refractive power having a concave object-side surface and a convex image-side surface with both being aspheric, and the fifth lens element with positive or negative refractive power having a convex object-side surface and a concave image-side surface with both being aspheric. Additionally, the image pickup optical lens assembly satisfies conditions related to the reduction of the total length and the sensitivity of the image pickup optical lens assembly for compact cameras and mobile phones with camera functionalities.Type: GrantFiled: May 5, 2014Date of Patent: October 20, 2015Assignee: LARGAN PRECISION CO., LTDInventors: Hsiang-Chi Tang, Hsin-Hsuan Huang
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Patent number: RE45941Abstract: Disclosed is a low-cost, compact image pickup lens for a solid-state image pickup element. The image pickup lens includes, in the order from an object side, a first lens L1, which has a convex surface facing the object side on an optical axis and has a positive refractive power; a second lens L2, which has a concave surface facing an image side on the optical axis and has a negative refractive power; a third lens L3, which has a convex surface facing the object side on the optical axis and has a meniscus shape; a fourth lens L4, which has a convex surface facing the image side on the optical axis, has a positive refractive power, and has a meniscus shape; and a fifth lens L5, which has a concave surface facing the image side on the optical axis, has a negative refractive power, and has a meniscus shape.Type: GrantFiled: April 13, 2015Date of Patent: March 22, 2016Assignee: KANTATSU CO., LTD.Inventors: Yoshio Ise, Masaya Hashimoto
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Patent number: RE46020Abstract: Provided is a method of controlling a pointer, such as changing between a pointer mode for activating the pointer and a search key mode for deactivating the pointer, in a mobile terminal having a pointing device. The method of controlling a pointer includes detecting movement input by the pointing device; identifying whether the detected movement satisfies a condition of changing a display mode; if the detected movement satisfies a condition of changing a display mode, displaying the pointer by changing the current display mode to a pointer mode; identifying whether a specific key is input; and if the specific key is input, hiding the pointer by changing the current display mode to a search key mode. Additionally, if elapsed time measured after displaying the pointer exceeds a predetermined value, the display mode of the mobile terminal may automatically be changed to a search key mode.Type: GrantFiled: May 30, 2013Date of Patent: May 31, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong Seok Ryu, Nho Kyung Hong, Jae Joon Hwang, Myoung Hwan Han
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Patent number: RE46034Abstract: An imaging lens includes an aperture stop, a positive first lens with a biconvex shape, a negative second lens; a negative third lens, a positive fourth lens, and a negative fifth lens arranged in this order from an object side. When the whole lens system has a focal length f, focal lengths and Abbe's numbers of the first and the second lenses are f1, ?d1, f2, and ?d2, focal lengths of the fourth and fifth lenses are f4 and f5, a composite focal length of the first lens L1 and the second lens L2 is f12, and a distance from a surface of the first lens L1 on the object side to a surface of the fifth lens L5 on the image side is ?d, the imaging lens satisfies the following conditional expressions: 0.7<f12/f<1.4 0.2<|f1/f2|<0.6 15<?d1??d2 0.4<f4/f<1.0 ?d/f<1.2 |f5/f|<1.0.Type: GrantFiled: March 10, 2015Date of Patent: June 21, 2016Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventor: Yoji Kubota
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Patent number: RE46066Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; and a fourth and a fifth lens having negative refractive power. The first lens is formed so that a curvature radius of an object-side surface is positive and the second lens is formed so that a curvature radius of an object-side surface and a curvature radius of an image plane-side surface are positive. The third lens is formed so that a curvature radius of an object-side surface is positive, and the fifth lens is formed so that a curvature radius of an object-side surface and a curvature radius of an image plane-side surface are both positive. An Abbe's number from the first and the third to the fifth lens is greater than 45, and an Abbe's number of the second lens is less than 35.Type: GrantFiled: August 12, 2015Date of Patent: July 12, 2016Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Ichiro Kurihara, Yoshio Ise, Tomohiro Yonezawa
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Patent number: RE46099Abstract: A deformable optical device includes a reflection device having a first reflecting surface and a second surface, an actuator (e.g., an integrated circuit piezoelectric actuator) having a support device and moveable extensions extending therefrom, which are coupled to the second surface, and electrodes coupled to corresponding ones of the extensions. Wavefront aberrations are detected and used to generate a control signal. The extensions are moved based on the control signal. The movement deforms the reflecting surface to correct the aberrations in the wavefront.Type: GrantFiled: March 19, 2015Date of Patent: August 9, 2016Assignee: ASML Holding N.V.Inventors: Pradeep K. Govil, Andrew Guzman
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Patent number: RE46159Abstract: Provided are a method of displaying messages in a digital home appliance and a display control method therefore. The method includes storing user setting information regarding output of messages and displaying a message based on the stored user setting information, where the user setting information is received from a user.Type: GrantFiled: December 24, 2014Date of Patent: September 20, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hue-yin Kim, Woo-hyoung Lee
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Patent number: RE46352Abstract: An imaging lens includes, in this order from an object side, an aperture stop ST, a positive first lens L1, a negative second lens L2 having a meniscus shape that directs a convex surface on the object side near an optical axis, a positive third lens L3, a positive fourth lens L4 having a meniscus shape that directs a concave surface on the object side near an optical axis, and a negative fifth lens L5 having a meniscus shape that directs a convex surface on the object side near an optical axis.Type: GrantFiled: June 30, 2015Date of Patent: March 28, 2017Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Ichiro Kurihara