Abstract: A motion picture code evaluator applicable to motion picture codes such as a scalability code, PB frame code and multi-object code is to be provided.

Abstract: There is provided a mirror supporting structure for a monochromator capable of turning the mirrors about axis lines which cross each other, thereby adjusting the attachment angles of the mirrors in two directions. The mirror supporting structure for a monochromator comprises first angle adjusting means for turning the mirrors about each first axis line which does not cross each plane direction of the mirrors and second angle adjusting means for turning the mirrors about each second axis line which does not cross each plane direction of the mirrors at right angles but is parallel with a line crossing the first axis line.

Abstract: A motion picture code evaluation apparatus for evaluating an amount of motion picture information after transmission, the apparatus has a header inspection unit for inspecting a frame header and determining that whether the frame header is abnormal or not to calculate frame loss ratio every predetermined time, an extracting unit for extracting motion picture coding parameter from the frame header and detecting variation of the motion picture coding parameter in the predetermined time, and an amount-of-motion-picture-information calculating unit for summing the motion picture coding parameter and weight, which is based on the variation of the motion picture coding parameter, to calculate an ideal amount of motion picture information every predetermined time, in which an actual amount of motion picture information is calculated by multiplying the ideal amount of motion picture information by (1−the frame loss ratio).

Abstract: A depolarizing plate comprising a first rectangular wedge plate that has a first crystallographic optical axis in a diagonal direction of the rectangle and which has a thickness thereof in a vertical direction vary continuously in a direction 45 degrees from said first crystallographic optical axis and a second rectangular wedge plate that has a second crystallographic optical axis in a diagonal direction of the rectangle crossing said first crystallographic optical axis at right angles and which has a thickness thereof in a vertical direction vary continuously in a direction 45 degrees from said second crystallographic optical axis, the two wedge plates being joined in such a position that said first crystallographic optical axis crosses said second crystallographic optical axis at right angles, wherein the slope formed by the joint of said wedge plates is rotated about the optical axis of an incident ray of light.

Abstract: A data processor 1 converts serial data in an STM-16 to parallel data that is based on eight bytes (64 bits). A transparent information detector 10 detects the position of the data (transparent data) as a candidate for transparent processing in the parallel data and transparent processors 30a through 30e serially connected in five stages converts the transparent data and rearranges the processed data based on the detected information. Thus, the data processor 1 can perform transparent processing easily via a relatively low-speed general-purpose device, by converting high-speed serial data in the STM-16 to every 8-byte parallel data for further processing.

Abstract: A device carrier capable of reliably measuring electric characteristics of the device with accuracy and an auto-handle are provided. The device carrier holds an IC having terminals on a lower face thereof at multiple positions, and allows the terminals to be brought into contact with contacts provided on an IC socket, wherein the device carrier comprises an opening through which the device can pass, a support part disposed on the opening for supporting the lower face of the IC, and a hinge part for turnably supporting the support part, wherein said supporter part is turned to release the support of the device when the socket approaches thereto. The supporter part engages with the release pins as the device carrier approaches to the IC socket to be turned so as to release the support of the lower face of the IC. The IC which has been released from being supported by the supporter part passes through the opening and is placed on the IC socket.

Abstract: A data processing apparatus and a data processing method easily realizable of a transparent processing of a high-speed serial data. The data processing apparatus (1) including a serial data conversion section for converting serial data to predetermined set of parallel data; a transparent data information detection section (10) for detecting information concerning transparent data, from the parallel data; an effective byte number operation section for operating an effective byte number of the parallel data; a transparent data conversion section (20) for converting transparent data of the parallel data, and moving predetermined data after the transparent data forward, in the parallel data; an address control section (304) for determining addresses at which the parallel data are rearranged; and a data array section (30) for moving predetermined data to one predetermined set of parallel data from another predetermined set of parallel data.

Abstract: A light source produces laser beams that are subjected to frequency modulation whose frequency can be adequately set or varied. A light modulator modulates laser beams with respect to the center wavelength, so that the lower sideband is used as probe light input into one end of the measured optical fiber. A pulse modulator produces laser pulses based on laser beams as pump light, which is input into the other end of the measured optical fiber, along which correlation peaks emerge at different positions. The output light is extracted from the other end of the measured optical fiber and is supplied to a timing adjuster, which adjusts a transmission timing to allow transmission of light proximate to a measuring point in the measured optical fiber therethrough. Thus, it is possible to reliably measure characteristics of the measured optical fiber entirely over the relatively long distance with high spatial resolutions.

Abstract: A circuit and a method, which can easily store data prior to and after determining a failure of a device without using a shift circuit. The circuit comprises: a counter for enabling a memory to write the data prior to determining the failure, and for disabling the memory from writing any data on the basis of the number of the data prior to and after determining the failure; a first address pointer circuit for controlling the memory so as to store the data prior to determining the failure in a predetermined address space, and for holding an address pointer indicating the predetermined address space; and a second address pointer circuit for controlling the memory so as to store the data after determining the failure of the device in a predetermined address space other than the predetermined address space wherein the data prior to determining the failure is stored.

Abstract: In a method of analyzing wavelength-division multiplexed signal light, a plurality of reference wavelengths (&lgr;C1-&lgr;Cm) as preliminary specified by the ITU-T standards are stored in a memory; then, maximum points of light intensity are determined from waveform data obtained by measuring an actual wavelength-division multiplexed optical spectrum; any one of the maximum points which at least differs in light intensity from the two minimum points, one being right to said maximum point and the other being left, by at least a channel identifying threshold (TH) level is identified as a channel, and the wavelength of the identified channel is determined as &lgr;Dn; then, the &lgr;Dn for each channel is rounded to the value of the nearest ITU-T grid wavelength &lgr;Cm so as to determine the reference wavelength &lgr;An for each channel and the determined reference wavelengths &lgr;An are stored in the memory.

Abstract: The optical interferometer in which the incident light beam 3 is branched into 2 optical paths of the reflection light and the transmission light which cross at right angle with each other by the beam splitter 4, and on each optical path, the reflection light is totally reflected by the first reflection unit 5, and the transmission light is totally reflected by the second reflection unit 6, and the reflection lights by both reflection units 5 and 6 are wave-combined again by the beam splitter 4, and received by the light receiver 7. The beam splitter 4 by which the incident light beam is wave-separated and wave-combined, is arranged with a little inclination from the vertical to the incident light beam.

Abstract: A phase lock loop circuit includes operation means (CPU) 15 for previously calculating divider control data 11 to obtain a division number corresponding to an output frequency, and a divider switching memory circuit 2 for writing the divider control data 11 and reading a division value 10 every time an output 9 of a variable divider 1 is generated, thereby controlling the variable divider 1.

Abstract: Optical fiber characteristic measuring device comprising a coherent light supply device, a light pulse generating device, a wave mixing device, a opto-electrical converting device, and a processing device, is provided such that parts have the frequency characteristic for corresponding to low frequency component for an opto-electrical converting device and a processing section so as to reduce the cost of the circuits.

Abstract: 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 reflectivity, lenses 5, 6, a diffraction grating 2, and a mirror 3, wherein a light emitted from the first facet is converted into a parallel light by the lens 5, and the parallel light passes through the diffraction grating 2 to select a wavelength and is reflected to the diffraction grating 2 by the mirror 3 to select a wavelength via the diffraction grating 2 again, and the parallel light is converged by the lens 5 to be fed back to the semiconductor laser 1, and a light emitted from the second facets is converged by the lens 7 to be output to an optical fiber 4.

Abstract: In a tunable laser source device for branching a light output from a tunable laser source portion 1 to supply to a wavelength measuring device 6 and a wavelength calibrating reference device 5 and then controlling the tunable laser source portion in response to an output of the wavelength measuring device, at least one peak and one notch or two peaks or two notches or more in a measurement interference period of the wavelength measuring device are included between a plurality of reference wavelengths of the wavelength calibrating reference device.

Abstract: In order to provide an IC tester which can measure noise measuring performance in a position where a DUT to be analyzed on an evaluation board is mounted quantitatively, a noise evaluation circuit comprises a reference resistor which generates thermal noise, a reference noise generator a summing circuit, an amplifying circuit which amplifies result of the calculation in the summing circuit, a switch, and an evaluation board having the reference resistor, the reference noise generator, the summing circuit, the amplifying circuit, and the switch thereon for evaluating the DUT to be evaluated. Two kinds of electricity value which is output by the amplifying circuit by an on/off operation of the switch are calculated with noise figure F according to three kinds of electricity value including electricity value such as the reference noise electricity.

Abstract: A position sensor for movable body, which detects a position of a movable body which moves in a reciprocal direction, comprises; at least two portions to be detected, which are provided on one side surface of the movable body with respect to a moving direction of the movable body, and at least two detectors for detecting the portions to be detected, wherein one portion to be detected is not arranged on a line parallel to the moving direction, on which the other portion is disposed, nor arranged on a line perpendicular to the moving direction, on which the other portion is disposed, one detector corresponding to the one portion is arranged so that when the one detector detects the one portion by moving the movable body in one direction, the other portion is moved in the one direction beyond the one detector, and the other detector corresponding to the other portion is arranged so that when the other detector detects the other portion by moving the movable body in the other direction, the one portion is moved i

Abstract: 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 two discrete spectrum data pieces F(j) and F(j+1) is greater than a predetermined threshold &egr; and four-point interpolation if the difference is smaller than &egr;.

Abstract: Optical wavelength sensitivities in an optical meter used for a sweep synchronization measurement are corrected by a method comprising the steps of measuring a plurality of reference values when no device under test is connected to the optical meter, computing a series of corrective values for the reference values for a plurality of selected reference wavelengths, respectively, such that the reference value at one of the selected reference wavelengths is zero, correcting a plurality of actual measured values using the series of corrective values when an device under test is connected to the optical meter, and displaying the actual measured values corrected.

Abstract: An electro-optic sampling apparatus is provided to enable measurement on potentials of signals on the conductor of coaxial cable with high precision and with ease. Herein, an electric input connector inputs a measured electric signal, which is introduced to a conductive path such as a microstrip line. An electro-optic material (e.g., Bi12SiO20) that provides electro-optic effect such as Pockel's effect is fixed to a bare portion of the conductive path and is varied in birefringence ratio in response to strength of electric field caused by the conductive path through which the measured electric signal transmits. The conductive path is then terminated by a terminal device. Now, a laser beam is radiated toward the electro-optic material, wherein it is varied in polarization in response to variations of the birefringence ratio. Then, the laser beam is reflected by a dielectric mirror and is separated into two beams by a polarization beam splitter.