Patent application number | Description | Published |
20080204714 | ON-VEHICLE FUEL PROPERTY DETECTION DEVICE - The detection device provides with an optical fiber composed of a core, a clad and a fiber jacket. A grating is applied to the core, and the fiber jacket located at the portion to which the grating is applied is removed so that the clad is in contact with a fuel fed to an injector of a vehicle. The detection device also provides with a light source for incidence of a light in a range of clad mode wavelength to the optical fiber, and a light-sensitive part for detecting an intensity of the light transmitting through the region to which the grating is applied. The optical fiber, light source and light-sensitive part are held in a conduit disposed in a fuel tank or between a fuel pump and the injector of the vehicle. | 08-28-2008 |
20080290369 | SEMICONDUCTOR LIGHT-RECEIVING DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor light-receiving device and its manufacturing method are provided which are capable of suppressing dark current and deterioration. Semiconductor crystals were sequentially grown over an n-type InP substrate, including an n-type InP buffer layer, an undoped GaInAs light absorption layer, an undoped InP diffusion buffer layer, and a p-type InP window layer. Next, a first mesa was formed by removing a part from the p-type InP window layer to the n-type InP buffer layer with a Br-based etchant having low etching selectivity, so as to form a sloped “normal” mesa structure. Next, a second mesa having a smaller diameter than the first mesa was formed by dry etching, by precisely removing a part from the p-type InP window layer to a certain mid position of the undoped InP diffusion buffer layer. | 11-27-2008 |
20090289316 | OPTICAL SEMICONDUCTOR DEVICE - An optical semiconductor device comprises a distributed Bragg reflector layer of a first conductivity type, an optical absorption layer, and a semiconductor layer of a second conductivity type, sequentially formed on a semiconductor substrate; wherein said Bragg reflection layer of the first conductivity type has first semiconductor layers having a band gap wavelength larger than the wavelength of incident light, and second semiconductor layers having a band gap wavelength smaller than the wavelength of incident light; and an optical layer thickness of each of said first semiconductor layers is larger than the optical layer thickness of each of said second semiconductor layers. | 11-26-2009 |
20090294787 | OPTICAL SEMICONDUCTOR DEVICE - An optical semiconductor device includes a distributed Bragg reflection layer of a first conductivity type, a distortion elaxation layer of the first conductivity type, a light absorbing layer, and a semiconductor layer of a second conductivity type, sequentially arranged on a semiconductor substrate. The distortion relaxation layer the same material as the semiconductor substrate. The total optical length of layers between the distributed Bragg reflection layer and the light absorbing layer is an integer multiple of one-half the wavelength of incident light that is detected. | 12-03-2009 |
20100080502 | OPTICAL FIBER SENSOR - An optical fiber sensor measuring refractive index of a medium with high sensitivity in a wide range. The optical fiber sensor includes an optical fiber causing a transmission loss due to leakage in the clad propagation mode from a portion of a core and a clad where a Bragg grating is provided, a light source permitting light in a wavelength band in the clad propagation mode to enter the optical fiber, and a light-receiving section receiving the transmitted or reflected light transmitted through the core and the clad at the portion where the Bragg grating is provided. The refractive index of the medium to be measured in contact with the clad is measured according to total intensity of the light received by the light-receiving section. The Bragg grating is inclined at a predetermined angle of inclination to the vertical line vertical to the length direction of the optical fiber. | 04-01-2010 |
20100133637 | AVALANCHE PHOTODIODE - An avalanche photodiode comprises: a substrate; a semiconductor layer of a first conductivity type on the substrate; and an avalanche multiplication layer, a light absorption layer, and a window layer which are sequentially formed on the semiconductor layer, wherein apart of the window layer is a region of a second conductivity type, and the light absorption layer includes a first light absorption layer, and a second light absorption layer which has higher electric conductivity than electric conductivity of the first light absorption layer. | 06-03-2010 |
20100296080 | OPTICAL FIBER SENSOR - An objective of the present invention is to provide an optical fiber sensor which has a simple configuration to enable sensitively measuring a refractive index of a measurement medium in a wide range of refractive indexes. An optical fiber sensor according to the present invention includes; an optical fiber having a core in which a short-period gratings are formed and a cladding, the optical fiber being made so that transmission loss occurs due to cladding-propagation-mode leakage at its cladding portion where the short-period gratings are formed; a light source from which light having a wavelength range of the cladding propagation mode is emitted; and a light receiving unit for receiving transmission or reflection light having passed through the cladding at the position where the short-period gratings are formed. The optical fiber sensor detects, based on the total receiving light intensity that the light receiving unit receives, the refractive index of the measurement medium contacting the cladding, in which the optical fiber is multi-mode one, and the short-period gratings have plural kinds of periods. | 11-25-2010 |
20130156361 | Mode-Evolution Compound Converter - A mode-evolution compound converter for processing an optical signal that includes a first component having a fundamental transverse magnetic (TM) mode and a second component having a fundamental transverse electric (TE) mode is disclosed. The compound converter includes a set of multiple converters connected to form a compound converter, wherein each converter is a mode-evolution converter selected from a group including a polarization converter, a spatial converter, and combination thereof, wherein the polarization converter at least converts a mode of a polarization of at least one component of the optical signal, and the spatial mode converter at least converts a spatial mode order of at least one component of the optical signal. | 06-20-2013 |
20140011349 | METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE - The present invention relates to a method for manufacturing a heterojunction semiconductor device including an AlGaN layer, the method including the steps of (a) forming a dummy electrode in a region where a gate electrode is arranged on the AlGaN layer, (b) depositing a dielectric film on the AlGaN layer by exposing side surfaces of the dummy electrode, using a device having anisotropy, (c) forming an opening in the dielectric film by removing the dummy electrode, and (d) forming the gate electrode that extends from inside the opening onto the dielectric film in a vicinity of the opening. | 01-09-2014 |
20140270635 | Multi-Mode Interference Device - A multi-mode interference (MMI) device includes a substrate layer, a core layer grown on the substrate layer for propagating an optical signal, and a cladding layer grown on the core layer for guiding the optical signal. The MMI device also includes a non-uniform pattern of patches forming a non-uniform refractive index distribution within the MMI device. | 09-18-2014 |
20140321823 | Multi-Mode Interference Device - A multi-mode interference (MMI) device includes a substrate layer, a core layer grown on the substrate layer for propagating an optical signal, and a cladding layer grown on the core layer for guiding the optical signal. The MMI device includes a patch with a non-uniform shape formed by an intersection of a plurality of curves forming a non-uniform refractive index distribution within the MMI device. The plurality of curves includes at least one curve with a non-null curvature. | 10-30-2014 |
20150069408 | HETEROJUNCTION FIELD EFFECT TRANSISTOR AND METHOD FOR MANUFACTURING THE SAME - A laminate includes a surface on which a gate electrode is provided, and is made of a nitride semiconductor. The laminate includes a first layer having a first band gap, and a second layer provided between the first layer and the surface and having a second band gap which is larger than the first band gap. The first and second layers and form a joint surface by a hetero junction. The surface includes a surface defect density equal to or smaller than 1.7×10 | 03-12-2015 |
20150086158 | Multi-Mode Phase-Shifting Interference Device - A multi-mode interference (MMI) device includes a substrate layer, a core layer deposited on the substrate layer for propagating an optical signal, and a cladding layer deposited on the core layer for guiding the optical signal. The core layer includes a core section suitable for propagating multiple optical signals having different wavelengths. The core section includes a shifting segment for uniquely shifting phases of the multiple optical signals. The shifting segment includes at least one or a combination of sections having different effective refractive index, a tilted segment, a curved section, and waveguides with variations in width, thickness or effective refractive index. | 03-26-2015 |
Patent application number | Description | Published |
20080218704 | Projection display - A projection display includes first and second light sources, a reflection/transmission member which partially transmits a first light beam from the first light source and partially reflects a second light beam from the second light source, and a light valve which converts the light beam from the reflection/transmission member into an optical image in accordance with a video signal. The reflection/transmission member has a reflective surface which is one side main surface, a light-shielding surface which is the other side main surface, and a plurality of openings extending through the both main surfaces. The first light beam is transmitted through the openings from the light-shielding surface to the reflective surface, and the second light beam is reflected off the reflective surface in the direction that the first light beam is transmitted. | 09-11-2008 |
20090097164 | Drive with voice coil motor - A drive is provided executing high-speed oscillatory motion. A voice coil motor in a pixel shifter includes a coil of a rectangular shape producing thrust along an axis, a flap fixing the coil, and flat springs giving to the flap an urging force against the thrust. An oscillation axis of the flap is parallel to the axis and located between another axis that is parallel and opposite to the axis and still another axis that is parallel to the axis and passes over a centroid of the coil. This reduces the value of the inertia per unit torque. | 04-16-2009 |
20090184775 | OSCILLATION DRIVE DEVICE - An oscillation drive device includes an oscillating unit that includes attaching portions on either sides thereof, the attaching portions being arranged on an oscillation axis; a base that includes an oscillating fulcrum that supports the oscillating unit on the oscillation axis and supporting portions that firmly support the oscillating unit; and a pair of strip-shaped leaf springs that is arranged so as to intersect with the oscillation axis and oscillates the oscillating unit on the oscillation axis, each of the strip-shaped leaf springs includes a fixing portion attached to the attaching portions of the oscillating unit; and a flexible beam portion that both ends of which are attached to the supporting portions of the base, and causes the oscillating unit to oscillate on the base by flexure behavior thereof. | 07-23-2009 |
20100002195 | PROJECTION-TYPE DISPLAY APPARATUS - A projection-type display apparatus includes an optical engine that forms an image with a laser beam from a laser light source; and an optical fiber that connects the laser light source and the optical engine. The optical engine includes a rod integrator that equalizes an optical-intensity distribution of the light beam output from the laser light source, and a rod fiber-fastening unit that fastens the rod integrator and the optical fiber to face each other such that a gap between an input facet of the rod integrator and an output facet of the optical fiber is large relatively to a wavelength of the light beam propagating through the optical fiber. | 01-07-2010 |
20100034225 | PROJECTION DISPLAY APPARATUS - In a projection display apparatus in which a laser beam source and an optical engine are connected together through an optical fiber, safety is improved against temperature rise in the optical fiber and its periphery. A projection display apparatus includes a temperature sensor | 02-11-2010 |
20100073638 | Projection display apparatus - A projection display apparatus is provided that is capable of reducing speckle noise, with no image of a flaw or dust noticeable in or on a screen even if it exists in or on an optical component. The projection display apparatus includes a glass rod that makes uniform an optical beam emitted from a laser beam source; a lens that focuses an optical beam passing through the glass rod; a diffusion layer that provides an optical path difference distribution to the optical beam focused using the focusing element, the diffusion layer being optically conjugated with an incident end of the glass rod by the focusing element; a display device that spatially modulates the optical beam provided with the optical path difference distribution by the diffusion layer; and a magnification projection lens that projects on a screen an optical beam modulated by the modulator. | 03-25-2010 |
20110228233 | PROJECTION DISPLAY DEVICE - A projection display device includes a light source, an optical intensity-equalizing element, an optical modulating element, an optical diffusion element, a relay optical system that is configured such that an output end of the optical intensity-equalizing element and a display element plane of the optical modulating element are optically conjugate, and a projection optical system. The relay optical system includes a first lens unit that condenses a light from the optical intensity-equalizing element and a second lens unit that further condenses a light from the first lens unit. The optical diffusion element is arranged between an light incident side of the first lens unit and the optical intensity-equalizing element. An optical axis of the second lens unit and a center of the output end of the optical intensity-equalizing element are shifted in a same direction from an optical axis of the first lens unit. | 09-22-2011 |
20140198301 | LIGHT SOURCE APPARATUS AND PROJECTOR - A light source apparatus according to the present invention includes a phosphor wheel having a phosphor disposed in an annular shape on a disk-shaped base material, the phosphor serving to emit fluorescent light from excitation light, thereby forming an excitation light source having a predetermined color, and the phosphor having a discontinuous portion in a part of the annular shape, an excitation light source for emitting the excitation light with which a passage position of the circular phosphor is irradiated with respect to the phosphor wheel to be rotatively driven by the wheel motor, and a controller that controls light emission of the light source and the excitation light source synchronously with a position of the discontinuous portion with respect to an irradiation position of the excitation light. | 07-17-2014 |
20140354956 | LIGHT SOURCE DEVICE AND PROJECTION-TYPE DISPLAY APPARATUS - A light source device includes a first light source that emits light of a first polarization, and a second light source that emits light of a second polarization whose polarization direction is different from the light of the first polarization by 90 degrees. A combined wavelength band of the light of the first polarization and the light of the second polarization is a first wavelength band. A third light source emits light of a third polarization and of a wavelength band which is different from the first wavelength band, and a fourth light source emits light of a fourth polarization whose polarization direction is different from the light of the third polarization by 90 degrees. A combined wavelength band of the light of the third polarization and the light of the fourth polarization is a second wavelength band which is different from the first wavelength band. A reflecting element reflects the light of the first polarization. A first selective transmission element transmits the light of the first polarization and reflects the light of the second polarization based on the polarization direction of the light. A second selective transmission element transmits combined light of the light of the first polarization and the light of the second polarization, and reflects the light of the third polarization based on the wavelength band of the light. A third selective transmission element transmits the combined light of the light of the first polarization and the light of the second polarization based on the polarization of the wavelength band, transmits the light of the third polarization and reflects the light of the fourth polarization based on the polarization direction of the light. The light of the first polarization, the light of the second polarization and the light of the third polarization passing through the third selective transmission element, and the light of the fourth polarization reflected by the third selective transmission element proceed in the same direction. | 12-04-2014 |
Patent application number | Description | Published |
20080298304 | ROUTING METHOD IN WIRELESS MULTI-HOP NETWORK AND COMMUNICATION TERMINAL - A wireless multi-hop network communication terminal | 12-04-2008 |
20090073910 | RADIO MULTI-HOP NETWORK, NODE, MULTICAST ROUTE CONTROL METHOD, AND PROGRAM THEREOF | 03-19-2009 |
20100002712 | PATH CONTROL METHOD ADAPTED TO AUTONOMOUS SYSTEM ROUTING PROTOCOL FOR COMMUNICATION NETWORK - A path control method includes a procedure for developing a path control message including regional information in transmission on the network. The regional information designates a path and/or a path length for transmitting the path control message. The path control message includes a regional property for instructing each node as to how to process the regional information either in a strict manner or in a flexible manner. With reference to the regional information and/or the regional property, each node is capable of selecting a destination node to which the path control message is to be transmitted, stopping the further transmission of the path control message, or discarding the path control message. | 01-07-2010 |
20100172240 | TRAFFIC ENGINEERING APPARATUS, NETWORK SYSTEM, AND TRAFFIC CONTROL METHOD AND PROGRAM - The present invention provides a traffic engineering apparatus which performs traffic engineering, including: an optimal branch point determination unit which determines an optimal branch point in a network to realize a predetermined policy; and a traffic flow regulation unit which regulates a traffic flow rate into the local node during reception of traffic based on the optimal branch point determined by the optimal branch point determination unit. | 07-08-2010 |
20100306574 | COMMUNICATION METHOD, COMMUNICATION SYSTEM, NODE, AND PROGRAM - The processing load of a path control message on a node due to a link fault is reduced, a normal routing operation is assured, and the stable continuity of a network is realized. The node having received the path control message transmits the path control message to the adjacent node having transmitted the path control message and at least one or more adjacent nodes on an alternate path. | 12-02-2010 |
20110173486 | COMMUNICATION APPARATUS, NETWORK, AND ROUTE CONTROL METHOD USED THEREFOR - Provided is a communication apparatus that is capable of enhancing fault resistance of a network. A communication apparatus includes, in a network where messages are exchanged among a plurality of communication apparatuses and route control is performed, a route summary processing means that creates route summary information obtained by summarizing route information of a local apparatus from a route table holding route information used for route control and traffic information between communication apparatuses, the route summary processing means further exchanging the route summary information that is created with other communication apparatuses; and a fault influence degree information processing means that calculates fault influence degree information indicating a degree of influences on traffic and the other communication apparatuses when the local apparatus is in a fault state, the fault influence degree information processing means further exchanging the fault influence degree information that is calculated with the other communication apparatuses; and a route adjustment processing means that adjusts the route table of the local apparatus using the route summary information and the fault influence degree information that are obtained by the local apparatus. | 07-14-2011 |
20130182621 | INFORMATION COLLECTION SYSTEM, TERMINAL AND SINK NODE USING WIRELESS MULTIHOP NETWORK, AND COMMUNICATION METHOD FOR THE SAME - In a wireless multihop network, collision between a routing control message and an information collection message is avoided, and information collection is completed within a predetermined time. A terminal includes: a transmission period control unit that calculates transmittable periods of a routing control message and an information collection message per hop, based on a hop count from the sink node and the number of terminals per hop, calculate a collision period during which the routing control message collides with the information collection message, based on both of the calculated transmittable periods, and recalculates the transmittable period of the routing control message so as to transmit the routing control message while avoiding the calculated collision period; a routing control unit that creates and transmits the routing control message within the transmittable period of the routing control message according to a hop count of the terminal; and an information transmission unit that creates and transmits the information collection message within the transmittable period of the information collection message according to a hop count of the terminal. | 07-18-2013 |
20130275619 | ROUTER, METHOD FOR USING CACHE WHEN CONTENT SERVER IS UNREACHABLE, AND PROGRAM - Provided is a router to acquire a content, even when accessibility to a server is impossible due to a network failure. The router comprises: a unit for storing content data included in a content reply message transmitted from a content server; a unit for, when the content server becomes unreachable, broadcasting, to other routers, an MBC setting request message configured to set guidance information in the other routers, the guidance information being used, when a content request message which requests the content server for the content data is transmitted from a content request node, to transfer the content request message to the own router; and a unit for replying a content reply message including the stored content data, when the content request message used to request the content server for the content data is transferred in accordance with the guidance information. | 10-17-2013 |
Patent application number | Description | Published |
20090087463 | Cosmetic containing glass flakes - A cosmetic of the present invention contains glass flakes. The glass flakes have a composition including at least 52 mass % of silicon dioxide and 5 mass % or less of alkali metal oxides. The glass flakes have an average thickness of 0.1 to 1.0 μm, an average particle diameter of 1 to 100 μm, and an average aspect ratio of 10 or greater. The average aspect ratio is obtained by dividing the average particle diameter by the average thickness. The particle diameter distribution index of the glass flakes is 5.0 or less. The particle diameter distribution index is obtained by dividing D90 by D10, where in the particle size distribution of the glass flakes, D10 is a particle diameter at which the cumulative mass distribution of particle diameters reaches 10% when counted from the smaller side, and D90 is a particle diameter at which the cumulative mass distribution of particle diameters reaches 90% when counted from the smaller side. | 04-02-2009 |
20090088515 | Glass Flake Filler, And Resin Composition Including The Same - A glass flake filler of the present invention is composed of glass flakes. The average thickness of the glass flakes is at least 0.1 μm but less than 0.5 μm, and the glass flakes include glass flakes having a thickness of at least 0.01 μm but not more than 2.0 μm in an amount of at least 90% by mass. A resin composition of the present invention is a resin composition including a thermoplastic resin and a glass flake filler. This glass flake filler is composed of glass flakes, the average thickness of the glass flakes is at least 0.1 μm but less than 0.5 μm, and the glass flakes include glass flakes having a thickness of at least 0.01 μm but not more than 2.0 μm in an amount of at least 90% by mass. | 04-02-2009 |
20100083872 | BRIGHT PIGMENT, AND BRIGHT COATING COMPOSITION AND AUTOMOTIVE BODY COATING EACH CONTAINING THE SAME - The bright pigment of the present invention includes flaky particles and a metal oxide layer coating at least a part of the surface of each flaky particle. The bright pigment or the flaky particles of the present invention have a particle size distribution in which the particle size at 99% of the cumulative volume from the smaller particle size is 48 μm or less, and the maximum particle size is 62 μm or less. The flaky particles are made of a material having a refractive index in the range of 1.4 to 1.8. The flaky particles have a thickness distribution in which the frequency of the particles having a thickness in the range of 0.8 μm to 1.9 μm is 90% or more by volume, or the frequency of the particles having a thickness in the range of 0.01 μm to 0.35 μm is 90% or more by volume. | 04-08-2010 |
20100092527 | GLASS FLAKES, AND COSMETIC CONTAINING THE SAME - The glass flakes of the present invention each include a glass flake substrate and a coating layer coating the surface of the glass flake substrate. The glass flake substrates have an average thickness of 0.1 to 1.0 μm, and an average particle size of 1 to 100 μm. The coating layers are formed of methyl hydrogen silicone and the content percentage of the coating layers is 0.05 to 2.50 mass % as determined by ignition loss at 625±20° C. | 04-15-2010 |