Patent application number | Description | Published |
20090231543 | Ocular light stimulus apparatus - A stimulus light from a stimulus light source is projected to the retina of an ocular fundus under examination to stimulate the retina in localized fashion to generate a bioelectric signal from the retina. The stimulus light source is mounted on a movable block, and an operating lever is used to move the stimulus light source to change the stimulus light on the retina. The size of the stimulus light can also be varied using a panel having a plurality of openings with different diameters for allowing the stimulus light to pass through. This assures a reliable local ERG examination because the bioelectrical signal can be produced in a wider area of the retina. The operating lever is further fixed by inserting a cap to keep the projected stimulus light unchanged. This allows the burden on the examiner to be reduced remarkably, assuring a reliable local ERG examination. | 09-17-2009 |
20090257027 | Ocular light stimulus apparatus - Stimulus light is projected from a stimulus light source onto an ocular fundus of an eye under examination to locally stimulate the retina in order to perform a biological examination. During a biological examination, first background light is projected from an illumination light source via an objective lens, and second background light is projected from a light source from the periphery of the objective lens onto the ocular fundus. During alignment prior to a biological examination, the first background light is turned off and the second background light is projected onto the ocular fundus. During observation of the ocular fundus, the first background light projected onto the fundus is blocked, so that fundus observation or eye fixation is not disturbed by the background light. This enables accurate alignment to be carried out. Since the examinee's eye is irradiated with the second background light from the periphery of the objective lens in preparation for a biological examination, the examinee's eye can sufficiently adapt to the light during a biological examination, ensuring a reliable biological examination. | 10-15-2009 |
20100165292 | Ophthalmic photographic apparatus - A timer function hold mode in which the timer continues the timing function is set in a mydriatic fluorescence mode by operating a timer switch for at least a fixed time, or by simultaneously operating a fluorescence filter switch and the timer switch. If the timer function hold mode is set in the mydriatic fluorescence mode, then the timing of the timer is continued even after the photography mode switches to another photography mode e.g. non-mydriatic or mydriatic color mode. When, on the other hand, the timer function hold mode is not set in the mydriatic fluorescence mode, the timer is caused to be stopped or reset when the mode is switched to the non-mydriatic or mydriatic color mode. | 07-01-2010 |
20100253910 | Ocular light stimulus apparatus - An ocular light stimulus apparatus is proposed in which an ocular fundus of an examinee's eye is illuminated by infrared light from an illumination light source via a ring slit disposed in the position conjugate with the anterior ocular segment thereof, and the ocular fundus is irradiated with stimulus light from a stimulus light source and background light from a background light source via a photographic stop disposed in the position substantially conjugate with the anterior ocular segment of the examinee's eye. This allows the background light to be projected onto the ocular fundus so as to spread in all directions about the center of the anterior ocular segment. Therefore, the entire ocular fundus can be uniformly illuminated about the position onto which the stimulus light is projected, and an accurate local ERG examination can be performed. Since the ocular fundus is irradiated with the background light and the stimulus light via the center part of the pupil, shading does not occur even when the pupil diameter is somewhat small, and the amount of the background light and the stimulus light can be kept constant regardless of the pupil diameter, ensuring a highly reliable local ERG examination. | 10-07-2010 |
Patent application number | Description | Published |
20080308743 | CHARGED PARTICLE BEAM APPLICATION APPARATUS - An apparatus capable of improving image quality by making it possible to suck specimens of different sizes electrostatically, and uniformalizing an electric field of a specimen edge portion, while suppressing increase in prime cost is provided. Specimen holding means is an electrostatic chuck, a master flat plane part surrounding a specimen of the largest size of specimen sizes, and an opening surrounding a specimen size except for the largest specimen size are included at an outer peripheral portion of the electrostatic chuck, a dummy specimen attachable to and detachable from the electrostatic chuck is included, and at a time of switching the specimen size, a dummy specimen is selected (or may be prevented from being used). | 12-18-2008 |
20100264330 | CHARGED PARTICLE BEAM APPLICATION APPARATUS - An apparatus capable of improving image quality by making it possible to suck specimens of different sizes electrostatically, and uniformalizing an electric field of a specimen edge portion, while suppressing increase in prime cost is provided. Specimen holding means is an electrostatic chuck, a master flat plane part surrounding a specimen of the largest size of specimen sizes, and an opening surrounding a specimen size except for the largest specimen size are included at an outer peripheral portion of the electrostatic chuck, a dummy specimen attachable to and detachable from the electrostatic chuck is included, and at a time of switching the specimen size, a dummy specimen is selected (or may be prevented from being used). | 10-21-2010 |
20110098960 | CHARGED PARTICLE BEAM DEVICE - Provided is a charged particle beam device wherein a secondary signal generated from an alignment pattern having known coordinate values in a sample coordinate system is detected, and a positional deviation quantity between the coordinate system of a sample ( | 04-28-2011 |
20120305766 | LINEAR MOTOR, MOVABLE STAGE AND ELECTRON MICROSCOPE - It is an object to balance suppression of a leakage magnetic field and driving performance. In a linear motor including a stator including a first yoke having an open face and two rows of permanent magnets linearly arrayed inside the first yoke so that S-poles and N-poles are alternate and a movable element arranged between the two rows of permanent magnets and linearly moving, a second yoke is connected to an open end of the first yoke so as to cover the open end of the first yoke and the permanent magnets when viewed from the open face of the first yoke. | 12-06-2012 |
20130167665 | SAMPLE OBSERVATION APPARATUS - Test pieces necessary to conduct a failure analysis of defects discovered with a defect review apparatus are produced with high quality, with excellent reproducibility, in a short period of time, and at low costs. An impression marking apparatus which can be driven in a direction perpendicular to a surface of a semiconductor wafer and is equipped with an impression needle fixed on the leading end of the mechanism is attached to a wafer defect review apparatus. A position to which impression marking is applied is determined on the basis of coordinate information on a defect previously acquired with the wafer defect review apparatus. In addition, the feed rate of the impression marking mechanism in the vertical direction thereof is determined on the basis of height information acquired with a height detection sensor for detecting the height of a wafer surface provided in the wafer defect review apparatus. | 07-04-2013 |
20130284924 | CHARGED PARTICLE BEAM APPARATUS - There is provided an apparatus which can accurately carry out focusing of an optical microscope mounted on a charged particle beam apparatus while restraining an increase in an apparatus cost and a reduction in a throughput. An approximate polynomial is formed based on a focus map of the optical microscope which is previously measured, and a control amount which adds a difference between a piece of wafer height information at that occasion and a piece of wafer height information in actual observation to the approximate polynomial is inputted as a focus control value of the optical microscope. | 10-31-2013 |
20140042338 | STAGE APPARATUS AND CHARGED PARTICLE BEAM APPARATUS - A stage apparatus includes a column for irradiating a sample with a charged particle beam, a vacuum sample chamber to which the column is attached, moving tables disposed in the vacuum sample chamber to move the sample relatively to the column, and position detectors for detecting positions of the moving tables. The stage apparatus includes an attachment member disposed between the column and the vacuum sample chamber. The attachment member has an opening which restricts movement of the column in a same direction as directions of the moving tables. Reference mirrors in the position detectors for detecting the positions of the tables are attached to the attachment member. Each of the reference mirrors has an adjustment apparatus to adjust a relative angle between the reference mirror and the laser beam. | 02-13-2014 |
Patent application number | Description | Published |
20140312246 | SAMPLE POSITIONING APPARATUS, SAMPLE STAGE, AND CHARGED PARTICLE BEAM APPARATUS - Provided is a sample positioning technology wherein micro-vibrations of a top table on which a sample is placed are suppressed such that the quality of an image to be observed or the precision of a measured dimension value can be improved. A sample positioning apparatus according to the present invention is provided with an active brake for stopping the top table, an inner frame which surrounds the active brake, an outer frame which surrounds the inner frame, and actuators for driving the active brake. The actuators, after driving the active brake to stop the top table with respect to a stage, press the outer frame to adjust the position of the top table. | 10-23-2014 |
20150053857 | STAGE APPARATUS, AND CHARGED PARTICLE BEAM APPARATUS USING SAME - The purpose of the present invention is to provide a stage apparatus that effectively suppresses the transmission of heat generated by a drive mechanism to a sample, and a charged particle beam apparatus using the same. In order to achieve the purpose, there are proposed a stage apparatus and a charged particle beam apparatus. The stage apparatus comprises a table; a drive source that drives the table in a predetermined direction; a first connection member provided between the table and the drive source; a second connection member provided between the table and the drive source and closer to the drive source than the first member; a slide unit supported by the second connection member; and a rail guiding the slide unit in a predetermined direction, the first connection member comprising a member having a relatively low heat conductivity with respect to the second connection member. | 02-26-2015 |
20150248991 | Stage Device and Charged Particle Beam Apparatus Using the Stage Device - To attain the above object, in the present invention, proposed are a stage apparatus including a sample stage that mounts a sample, a first position detection device that detects a position of the sample stage, a second position detection device that detects a position of the sample stage when the sample stage is positioned in a part of a stage movement range that the first position detection device is capable of detecting, and a control device that adjusts an offset amount of the first position detection device on the basis of a position detection result obtained by the second position detection device, and a charged particle beam apparatus using the stage apparatus. | 09-03-2015 |
Patent application number | Description | Published |
20110001663 | POSITION CALCULATION METHOD AND POSITION CALCULATION APPARATUS - A position calculation method and apparatus are described. The position calculation apparatus may include an inertial measurement unit and be configured to be coupled with at least one sensor unit for detecting a physical event for use in position calculation. The presence of and type sensor unit may identified, and the position processing to be undertaken may depend on this identification. | 01-06-2011 |
20110148695 | METHOD AND SYSTEM FOR CALCULATING POSITION - A method for calculating a position of a moving vehicle using a first unit that performs a correlation process on a satellite signal received from a satellite to capture the satellite signal and calculate the position and velocity of the moving vehicle and a second unit capable of detecting at least the velocity of the moving vehicle includes: calculating a determination velocity which is the velocity determined using the results of the calculation by the first unit and the results of the detection by the second unit; determining a correlation integration period used when the first unit performs the correlation process using the error in the determination velocity; and calculating the position of the moving vehicle using the results of the calculation by the first unit and the results of the detection by the second unit. | 06-23-2011 |
20110206092 | SIGNAL ACQUISITION METHOD AND SIGNAL ACQUISITION APPARATUS - A signal acquisition method includes: performing a correlation operation for a received satellite signal, the satellite signal being transmitted from a positioning satellite; frequency-analyzing a result of the correlation operation over a predetermined time which is equal to or longer than a bit length of navigation message data carried by the satellite signal; extracting a power value in each frequency in which the power value satisfies a predetermined power condition, from a result of the frequency analysis; and acquiring the satellite signal using the extracted power value. | 08-25-2011 |
20110206093 | SIGNAL ACQUISITION METHOD AND SIGNAL ACQUISITION APPARATUS - A signal acquisition method includes: performing a correlation operation for a satellite signal received from a positioning satellite; frequency-analyzing a result of the correlation operation over a predetermined time which is equal to or longer than a bit length of navigation message data carried by the satellite signal; extracting a power value in a predetermined frequency which includes at least a specific frequency determined according to the bit length, from a result of the frequency analysis; and acquiring the satellite signal using the extracted power value. | 08-25-2011 |
20110235687 | SIGNAL ACQUISITION METHOD, SIGNAL ACQUISITION APPARATUS AND ELECTRONIC DEVICE - A signal acquisition method includes: frequency-converting the frequency of a reception signal which is a satellite signal received from a positioning satellite into a specific frequency corresponding to a bit length of navigation message data carried by the satellite signal; performing a first correlation operation according to a signal of the frequency-converted specific frequency; integrating results of the first correlation operation over a predetermined time longer than the bit length; and acquiring the satellite signal using the integrated results. | 09-29-2011 |
20120038508 | SATELLITE SIGNAL TRACKING METHOD AND RECEIVER - A satellite signal tracking method performed by a receiver that receives a satellite signal from a positioning satellite, the satellite signal tracking method including: computing a first Doppler frequency using a received signal obtained by receiving the satellite signal, computing a second Doppler frequency using the first Doppler frequency and a signal from the sensor unit including at least an acceleration sensor, and acquiring the satellite signal using the second Doppler frequency. | 02-16-2012 |
20130338915 | ATTITUDE DETERMINATION METHOD, POSITION CALCULATION METHOD, AND ATTITUDE DETERMINATION DEVICE - A new method for determining an attitude of a sensor with respect to a moving body is proposed. A movement vector is measured by a sensor mounted in the moving body. In addition, the attitude of the sensor with respect to the moving body is determined using the movement vector measured by the sensor when the moving body starts to move. | 12-19-2013 |
20140104101 | POSITION CALCULATING METHOD AND POSITION CALCULATING DEVICE - A position calculating device of a moving object including a satellite positioning unit and an inertial positioning unit sets an influence level of measurement result 1 of the satellite positioning unit on measurement result 2 of the inertial positioning unit to a first level until a given condition is established after position calculation is started, and sets the influence level to a second level after the given condition is established. The position of the moving object is calculated by performing a coupling process of coupling measurement result 1 and measurement result 2 on the basis of the set influence level. | 04-17-2014 |
20140106775 | POSITION CALCULATING METHOD AND POSITION CALCULATING DEVICE - In a position calculating device of a moving object including a satellite positioning unit and an inertial positioning unit, a position calculation accuracy determining unit determines a position calculation accuracy and sets an influence level of measurement result 1 of the satellite positioning unit on measurement result 2 of the inertial positioning unit on the basis of the determined position calculation accuracy. The position of the moving object is calculated by performing a coupling process of coupling measurement result 1 and measurement result 2 on the basis of the set influence level. | 04-17-2014 |
20140214317 | POSITION CALCULATING METHOD AND POSITION CALCULATING DEVICE - To suggest a technique of more accurately calculating a position using both measurement results of a satellite positioning unit and an inertial positioning unit. | 07-31-2014 |
20140303924 | REFERENCE VALUE GENERATING METHOD AND REFERENCE VALUE GENERATING DEVICE - Based on a local coordinate velocity vector calculated by a local coordinate velocity vector calculation unit and an attitude angle calculated by an attitude angle calculation unit, a change portion of a detected value in the past that is similar to a change in a detected value of attitude and velocity during movement of the user is extracted as a correlation calculation unit provided in each of a reference velocity vector calculation unit and a reference attitude angle calculation unit carries out predetermined correlation calculation. Then, a reference value of the detected value used when correcting the detected value is calculated and generated by the reference velocity vector calculation unit and the reference attitude angle calculation unit, using the result of the extraction. | 10-09-2014 |
20150134294 | ATTITUDE CALCULATION APPARATUS AND ATTITUDE CALCULATION METHOD - An attitude calculation apparatus includes a gyro sensor that detects angular velocity in a first coordinate system for an inertial coordinate system, of a living body or a moving object which moves by using energy of the living body as a power source, an attitude change calculation unit that calculates an attitude change of the moving object on the basis of the angular velocity which is input at a first frequency f1, and an attitude update unit that updates an attitude of the moving object on the basis of the attitude change which is input at a second frequency f2, in which the first frequency and the second frequency satisfy f1>f2≧20 Hz. | 05-14-2015 |
Patent application number | Description | Published |
20100275104 | ERROR CORRECTING DEVICE AND ERROR CORRECTING METHOD - An error correcting device in an optical communication system that transmits a transmission frame formed by adding an overhead and an error correction code to information data uses a concatenated code or an iterated code of at least two error correction codes as an outer code and an error correction code for soft-decision decoding as an inner code. | 10-28-2010 |
20100287449 | FEC FRAME STRUCTURING DEVICE AND FEC FRAME STRUCTURING METHOD - An FEC frame structuring device includes a multi-lane distributing unit that distributes a data frame to be transmitted to n lanes, FEC coding units each performs FEC coding of the distributed data frame independently for each of the n lanes to generate an FEC frame, a multiplexing unit that multiplexes the FEC frame from the FEC coding units by relating to m channels of an optical signal, a demultiplexing unit that demultiplexes the m channels of the received optical signal by relating to the n lanes, FEC decoding units each performs FEC decoding of the demultiplexed FEC frame independently for each of the n lanes, and a multi-lane synchronizing unit that synchronizes the n lanes with each other after the FEC decoding performed by the FEC decoding units to reconstruct the original data frame. | 11-11-2010 |
20100287450 | OPTICAL RECEIVING APPARATUS AND OPTICAL RECEIVING METHOD - An optical receiving apparatus includes: an A/D converting circuit; a received-signal demodulating circuit that demodulates a received digital signal from the A/D converting circuit into an m-bit received signal; a soft-decision-data generating circuit that generates n-bit (n≦m) soft-decision data based on the m-bit received signal; and an error correcting circuit that performs error correction based on the n-bit soft-decision data and outputs an error-corrected received signal. The soft-decision-data generating circuit generates soft-decision data of n bits (n=p+1) that corresponds to a determination result according to 2 | 11-11-2010 |
20100293432 | ERROR-CORRECTION CODING METHOD, ERROR-CORRECTION DECODING METHOD, ERROR-CORRECTION CODING APPARATUS, AND ERROR-CORRECTION DECODING APPARATUS - An error-correction coding method that includes outer coding of performing a coding process for an outer code; and inner coding of performing a coding process for an inner code that has an error correction capability adjusted based on an error correction capability of the outer code. | 11-18-2010 |
20110002693 | DIGITAL SIGNAL PROCESSING OPTICAL TRANSMISSION APPARATUS - In a digital signal processing optical transmission apparatus such as a predistortion or OFDM type one, optical transmission at a stable S/N ratio is intended to be able to be made by controlling an output of an optical transmission signal with fixed average power, even if a peak to average power ratio of the optical transmission signal changes. The apparatus is provided with an average power calculation unit ( | 01-06-2011 |
20110013907 | MULTI-VALUE OPTICAL TRANSMITTER - Provided is a multi-value optical transmitter in which a DC bias may be controlled to be stabilized so as to obtain stable optical transmission signal quality in multi-value modulation using a dual-electrode MZ modulator. The multi-value optical transmitter includes: D/A converters for performing D/A conversion on first and second modulation data which are set based on an input data series, so as to generate a first and a second multi-value signal, respectively; a dual-electrode MZ modulator including phase modulators for modulating light from a light source based on the first multi-value signal and the second multi-value signal, so as to combine optical signals from the phase modulators to output the optical multi-value signal; an optical output power monitor for detecting average power of the optical multi-value signal; and a DC bias control unit for controlling a DC bias for the dual-electrode MZ modulator, so as to maximize the average power. | 01-20-2011 |
20110158648 | OPTICAL NETWORK SYSTEM, OPTICAL REDUNDANT SWITCHING APPARATUS, AND WDM APPARATUS - An optical network system includes a first node that converts input signals of n systems into optical signals having wavelengths different for each of the systems and wavelength-multiplexes and transmits the optical signals and a second node that selects signals of n systems from the wavelength-multiplexed signals and outputs the signals. The first node includes an optical coupler that divides the input signals into operating system signals and redundant signals, TPNDs that convert the operating systems into optical signals, an optical switch that selects standby system signals from the redundant signals, and a TPND that converts the standby system signals into optical signals in a storage mode corresponding to a type of the standby system signals. The second node includes TPNDs that convert the optical signals converted from the operating system signals into signals of a type corresponding to the input signals, a TPND that converts the optical signals of the standby system signals into signals of the type of the input signals in a storage mode corresponding to the standby system signals, and an optical switch that selects an output destination of the signals output from the TPND. | 06-30-2011 |
20110173511 | METHOD AND DEVICE FOR ENCODING OF ERROR CORRECTING CODES, AND METHOD AND DEVICE FOR DECODING OF ERROR CORRECTING CODES - Provided is an error correction encoding device including: an outer encoding circuit ( | 07-14-2011 |
20110217000 | OPTICAL SWITCH AND OPTICAL-SWITCH CONTROL METHOD - An optical switch according to the present invention includes a multiple-stage optical-switch unit that includes one input port and a plurality of output ports that are configured by connecting multiple stages of optical switching elements each of which includes three or more optical input-output ports; and a switching control circuit that, when receiving a switching instruction to switch an output destination of light input from the input port, executes at first a first control that changes setting of an optical switching element that is included in part not overlapping with an optical transmission channel reaching an optical output port before switching in an optical transmission channel reaching an optical output port after switching and is positioned at a point other than a branch point from an overlapping part, and then executes a second control that changes setting of an optical switching element that is positioned at the branch point. | 09-08-2011 |
20110255876 | OPTICAL TRANSMITTER - An optical transmitter for converting an input data series into an optical multi-level signal and for outputting the same, includes an LUT in which data for executing optical multi-level modulation is stored and from which first modulation data and second modulation data are output based on the input data series. A DAC converts the first modulation data by D/A conversion to generate a first multi-level signal. A DAC converts the second modulation data by D/A conversion to generate a second multi-level signal. A dual-electrode MZ modulator includes a first phase modulator for modulating light from a light source in accordance with the first multi-level signal and a second phase modulator for modulating light from the light source in accordance with the second multi-level signal, and combines an optical signal from the first phase modulator and an optical signal from the second phase modulator to output the optical multi-level signal. | 10-20-2011 |
20110299852 | OPTICAL TRANSMISSION AND RECEPTION SYSTEM, OPTICAL TRANSMITTING AND RECEIVING APPARATUS, AND OPTICAL TRANSMISSION AND RECEPTION METHOD - An optical transmission and reception system in which a plurality of tributary signals are converted into multilevel modulated light for transmission and reception. An apparatus for transmitting multilevel modulated light includes: FECs which perform error correction processing including addition of a tributary identifier; and a GEAR BOX which performs rate conversion on the processed signals. An apparatus for receiving multilevel modulated light includes: a 20G DQPSK REC which separates received multilevel modulated light into received tributary signals and outputs the signals to respective output systems; the GEAR BOX which performs rate conversion on the received tributary signals; the FECs which extract tributary identifiers from the received tributary signals; a TIM which compares tributary identifiers defined for the respective output systems in advance with the tributary identifies extracted; and a tributary selector which gives an instruction to change correspondence between the received tributary signals and the output systems if the result of comparison is a mismatch. | 12-08-2011 |
20120183303 | MULTILEVEL MODULATED OPTICAL TRANSCEIVER AND MULTILEVEL MODULATED OPTICAL TRANSMITTING/RECEIVING METHOD - A digital signal processing optical transceiver includes: a reception front end for separating an optical reception signal from a communication path into a total of four channels including an I-channel and a Q-channel of an X-polarized wave component and an I-channel and a Q-channel of a Y-polarized wave component; and a digital signal processing unit for: performing signal point determination with respect to signals of the four channels; when there are only two signal points, selecting two channels including an I-channel component of an X-polarized wave and an I-channel component of a Y-polarized wave and performing signal processing thereon; and when there are four signal points, selecting the four channels including the I-channel component and a Q-channel component of the X-polarized wave and the I-channel component and a Q-channel component of the Y-polarized wave and performing the signal processing thereon. | 07-19-2012 |
20120201546 | PRE-EQUALIZATION OPTICAL TRANSMITTER AND PRE-EQUALIZATION OPTICAL FIBER TRANSMISSION SYSTEM - A pre-equalization optical transmitter includes: an RZ conversion circuit for generating an RZ-type input data sequence based on an NRZ-type input data sequence and a clock that is twice the speed of the NRZ-type input data sequence; a digital filter for generating pre-equalized data by a convolution operation between the RZ-type input data sequence and a desired transfer function corresponding to the wavelength dispersion of an optical fiber transmission path; D/A converters for performing D/A conversion on the pre-equalized data to output analog pre-equalized data; and a vector modulator for modulating light from a laser light source based on the analog pre-equalized data to output an RZ-type optical signal. | 08-09-2012 |
20120246537 | ERROR CORRECTION METHOD AND DEVICE - Provided is an error correction method for an optical communication system that transmits a transmission frame formed of information data added with an overhead and an error correction code, the error correction method including adjusting a size of an FEC redundant area of an FEC frame for storing client signals of different signal types in accordance with the client signals so that transmission rates of the FEC frame for the respective client signals have an approximately N-multiple relationship (N is a positive natural number). With this, it is possible to obtain an error correction method and device capable of providing a high-quality and high-speed optical communication system without performance degradation caused by jitter or the like and with the common use of circuits having a reduced circuit scale. | 09-27-2012 |
20130039643 | OPTICAL COMMUNICATION SYSTEM - An optical communication system including optical transmission systems each includes a transmission processing unit and a receiving processing unit, wherein the transmission processing unit includes an optical transmission unit that converts electric signals into optical signals, an auxiliary optical transmission unit that converts a part of the electric signals into an optical signal having a wavelength other than wavelengths of the optical signals generated by the optical transmission unit, and outputs the generated optical signal to a different transmission processing unit, and a wavelength multiplexing unit, and the receiving processing unit includes a wavelength demultiplexing unit, an optical receiving unit that converts the optical signals having the wavelengths of the optical signals generated by the optical transmission unit into electric signals, respectively, and an auxiliary optical receiving unit that converts the optical signal having the wavelength of the optical signal generated by the auxiliary optical transmission unit. | 02-14-2013 |
20130129356 | OPTICAL COMMUNICATION SYSTEM - An optical communication system includes an optical-signal transmission unit transmitting an existing optical signal and a low-rate-signal superimposition unit superimposing a low-rate signal on the existing optical signal by intensity modulation. It further includes: a low-rate-signal extraction unit that extracts the low-rate signal from the existing optical signal on which the low-rate signal is superimposed and converts the extracted low-rate signal into a low-rate electric signal; an add-on optical-signal transmission unit that transmits an add-on optical signal; a low-rate-signal superimposition unit that superimposes a low-rate signal on the add-on optical signal by the intensity modulation based on the low-rate electric signal; and a repeater that repeats the add-on optical signal on which the low-rate signal is superimposed, to a transmission destination. | 05-23-2013 |
20130136451 | OPTICAL TRANSFER SYSTEM, OPTICAL TRANSMISSION DEVICE, AND OPTICAL RECEPTION DEVICE - In an optical transfer system, an optical transmission unit generates an optical signal in which respective polarization components are alternately present on a time axis, a time period during which the respective polarization components are simultaneously present on the time axis is substantially zero, and a symbol repetition cycle of optical signals of the respective polarization components becomes Ts, an optical reception unit causes an interference between local oscillation light and a received optical signal and converts an interfered optical signal to an electric signal, and a received electric-signal processing unit performs analog-digital conversion of an electric signal, elimination of a delay difference of Ts/2 between the respective polarized signal components, and adaptive equalization of a distortion other than the delay difference. | 05-30-2013 |
20130311840 | METHOD AND DEVICE FOR ESTIMATING INPUT BIT ERROR RATIO - An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing. | 11-21-2013 |
Patent application number | Description | Published |
20150080156 | CONTINUOUSLY VARIABLE TRANSMISSION AND ITS HYDRAULIC PRESSURE CONTROL METHOD - A target primary pressure and a target secondary pressure are set based on a speed ratio, a target line pressure as a target value of a line pressure is set to be a value obtained by adding an offset amount, as a positive value, to either one having a higher value out of the target primary pressure and the target secondary pressure, in at least a cross-point region as a region where an absolute value of a deviation, obtained by subtracting the target primary pressure from the target secondary pressure, is smaller than a predetermined deviation, and a primary pressure, a secondary pressure, and the line pressure are controlled to be the target primary pressure, the target secondary pressure, and the target line pressure, respectively. | 03-19-2015 |
20150148156 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREFOR - A transmission controller searches a mechanical High, which is a minimum value of a possible speed ratio of the continuously variable transmission (CVT), based on an actual speed ratio, sets a control High lower than the mechanical High by a predetermined amount, and controls a speed ratio of the CVT by setting a minimum value of a speed ratio range of the CVT at the control High. | 05-28-2015 |
20150148157 | CONTINUOUSLY VARIABLE TRANSMISSION AND A HYDRAULIC CONTROL METHOD THEREOF - A transmission controller determines whether a shift is a kickdown, and when the shift is determined as the kickdown, the target line pressure is increased to a first target pressure corresponding to an input torque to a continuously variable transmission increased by the kickdown; the transmission controller then determines whether the line pressure has reached the first target pressure, and if determined that the line pressure has reached the first target pressure, the target line pressure is increased to a second target pressure higher than the first target pressure. | 05-28-2015 |