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| Number | Title | Issue Date |
| 6928089 | Pattern synchronous circuit Sort operations of an input signal are performed by providing a first sort part 6 comprising one shift circuit 8 and (l−1) sort circuits 9a to 9c, and a second sort part 7 comprising one delay circuit 10, (m−1) sort circuits 11... | 08/09/2005 |
| 6700904 | Light source for an external cavity laser A light source for an external cavity laser comprises a semiconductor laser 1 having a first facet to which is applied an antireflection coating 1A and a second facet to which is applied a increased reflection coating 1B defining a predetermined reflectiv... | 03/02/2004 |
| 6690977 | Data processor and data processing method for wavemeter A DSP#B 6 executes, prior to data conversion, interpolation (see FIG. 2) in order to interpolate discrete spectra obtained via the FFT processing by a DSP#A 5. In the interpolation, the DSP#B 6 executes two-point interpolation if the difference between tw... | 02/10/2004 |
| 6678762 | Data processor and data processing method The data processor 1 converts the serial data in the STM-16 to parallel data that is based on four bytes (32 bits). The transparence data detector 20 detects the position of the data (transparence data) as a candidate for transparence processing in the pa... | 01/13/2004 |
| 6614511 | Light wavelength dispersion measuring apparatus and light wavelength dispersion measuring method In a light wavelength dispersion measuring apparatus 1, three band-pass filters BPa1 to BPa3 are connected in parallel, three band-pass filters BPb1 to BPb3 are connected in parallel, and three phase comparators PCa to PCc are connected in parallel for ma... | 09/02/2003 |
| 6597507 | V-groove grating mirror and external resonator type wavelength variable light source using the mirror An external resonator type wavelength variable light source comprises a semiconductor laser 5 formed on one end face with a antireflection coating 5a, a lens 6 for converting emitted light from the end face of the semiconductor laser 5 formed with the ant... | 07/22/2003 |
| 6594019 | Data processor and data processing method for wavemeter The DSP#A 5 specifies a read address for reading digital interference signal data stored in the buffer 4 to read the data, and executes the butterfly operation including a preset hamming windowing function coefficient to convert digital interference signa... | 07/15/2003 |
| 6590642 | Apparatus for inspecting fiber with optical connector A light source 1 is connected to a first terminal of an optical branch coupler 2, and a first optical sensor 3 is connected to a second terminal. A second optical sensor 4 is connected to a fourth terminal, and a master optical connector 7 is connected to... | 07/08/2003 |
| 6560003 | Light receiving module and light receiving method with reduced polarization dependence A light receiving module and a light receiving method to reduce polarization dependence, used in evaluation of polarization characteristics of various optical parts. The light receiving module has an optical mechanism including a first light transmission ... | 05/06/2003 |
| 6496134 | Frequency spectrum method and frequency spectrum analyzer The problem is solved by converting each radio frequency of a plurality of communications systems to tested signals as digital signals via single A/D conversion means; inputting the one A/D-converted tested signal to Fourier transform means 16 for frequen... | 12/17/2002 |
| 6483684 | Current limiting apparatus In the current limiting circuit, which is provided with: the D/A converter 2A to output the voltage signal to supply the power source onto the load 11; reversal amplifier circuit to amplify the voltage signal; capacitor 10 to absorb the fluctuation of the... | 11/19/2002 |
| 6445207 | IC tester and IC test method A control processor 1 stores a power supply current acquisition start address in a storage circuit 21 and a power supply current acquisition end address in a storage circuit 22. When a pattern generation address signal input from a pattern generator 2 mat... | 09/03/2002 |
| 6219287 | Fail memory circuit and interleave copy method of the same The address generation circuit 10 generates the address in which the fail data is stored. The logical circuit 15 comprises: when the address is inputted, a circuit to delay the address by a predetermined constant time; a circuit to output the selection si... | 04/17/2001 |
