摘要:
A charged beam apparatus comprises vacuum vessels for accommodating superconducting coils in a heat-insulating manner, a charged beam vacuum chamber that provides a passage for a charged beam, and a vacuum chamber for synchrotron radiation that is coupled to the charged beam vacuum chamber and through which is passed the synchrotron radiation that is produced by the charged beam when it is bent by the superconducting coils, the vacuum vessels being detachable from the charged beam vacuum chamber.
摘要:
A rotor of a superconductive rotary electric machine is disclosed in which fillers are inserted between the superconductive magnetic field coils and a plurality of padding plates which cover the entire side face of the superconductive field coils so that all the turns of the superconductive magnetic field coils are firmly secured. The rotor therefore can be stably operated.
摘要:
A charged particle accelerating apparatus has a vacuum chamber for transporting, accelerating, deflecting or storing charged particles. A layer of a low gas-generating material is placed in the vacuum chamber at a position where radiation generated by deflection of the charged particles are irradiated, the low gas-generating material having properties of generating an amount of gas less than a material constituting the vacuum chamber.
摘要:
A motor-operated fan apparatus is made up of a brushless motor and a centrifugal fan. The brushless motor has: a rotary shaft vertically disposed on a substrate in a rotatable manner; a stator disposed coaxially with the rotary shaft; and a rotor integrally disposed on the rotary shaft. The centrifugal fan has: a disk part which covers the brushless motor and is fixed to the rotary shaft; and a multiplicity of vane parts which are disposed so as to be elongated from an outer edge of the disk part. A ventilation control member is provided in a space between the rotor and the disk part to block the air flowing from the substrate side to the space between the rotor and the disk part.
摘要:
The present invention provides a variable optical dispersion compensating module comprised of (a) an optical dispersion compensating unit having an input optical switch, an optical dispersion compensating fiber, connected to the optical switch, having a predetermined optical dispersion amount, a bypass path for bypassing the optical dispersion compensating fiber, and an output optical switch connected to the optical dispersion compensating fiber and the bypass path, (b) an optical dispersion compensating circuit with at least one of the unit connected in series, and (c) an optical attenuator provided, in the direction of an optical path, after the input optical switch or before the output optical switch of the optical dispersion compensating circuit.
摘要:
A brushless motor for a blower fan unit is comprised of a heat sink which has a heat radiating portion and a pair of supporting legs extending from both opposite sides of the heat radiating portion. A free end portion of each supporting leg is in contact with an electric circuit board. A pressing member has a pressing portion, a pair of positioning portions perpendicularly extending from opposite end portions of the pressing portion, and a pair of connecting portions projecting from the pair of positioning portions respectively. The connecting portions are engaged with supporting legs of the heat sink respectively. The pressing portion presses switching devices to the heat sink. The positioning portions are inserted into the through-holes of the electric circuit board respectively.
摘要:
An arrayed waveguide grating type optical multiplexer/demultiplexer including an arrayed waveguide grating having a plurality of channel waveguides. Concave end faces of input-side and output-side slab waveguides are connected to opposite ends of the diffraction grating. At least one input waveguide and at least one output waveguide are connected to the other concave end faces of the input-side and output-side slab waveguides, respectively. The focal length of the output-side slab waveguide end face is longer than the focal length of the input-side slab waveguide end face. The optical multiplexer/demultiplexer has a sufficiently flat wavelength-dependent spectrum response in passing channel spacings, and helps construct an optical wavelength multiple communication system having a good signal-to-noise ratio.
摘要:
An optical line monitoring method and an apparatus for locating a failure point in an optical communication system, wherein a plurality of types of inspection light rays having wavelengths which are determined by cut-off wavelengths, which differ from each other, of short-wavelength pass filters installed at a plurality of branched ports of an optical coupler/splitter of the communication system are sent from a light source having variable wavelengths into one or more corresponding optical fiber lines of the system in sequence via an optical directional coupler and the optical coupler/splitter. Each time reflected light, corresponding to the inspection light, from one or more optical fiber lines is received, an output representing the intensity level of the reflected light is sent from a light receiver to an arithmetic circuit and stored in the arithmetic circuit. The arithmetic circuit calculates the reflected light intensity levels which correspond to the individual optical fiber lines according to the light receiver outputs which individually correspond to inspection light rays, whereby the position of the failure in the optical fiber line incurring the failure is identified.
摘要:
The present invention provides a variable optical dispersion compensating module comprised of (a) an optical dispersion compensating unit having an input optical switch, an optical dispersion compensating fiber, connected to the optical switch, having a predetermined optical dispersion amount, a bypass path for bypassing the optical dispersion compensating fiber, and an output optical switch connected to the optical dispersion compensating fiber and the bypass path, (b) an optical dispersion compensating circuit with at least one of the unit connected in series, and (c) an optical attenuator provided, in the direction of an optical path, after the input optical switch or before the output optical switch of the optical dispersion compensating circuit.
摘要:
The present invention provides a planar lightwave circuit platform and its method for manufacturing by which the characteristics of the planar lightwave circuit become stable. In a planar lightwave circuit platform comprising quartz-based lower cladding layer (2), height adjusting layer (3), core layer (4), and upper cladding layer (5) formed in order on substrate (1), wherein the glass softening temperature of the height adjusting layer (3) is set to be higher than the glass softening temperatures and the temperatures for transparent-vitrification of the core layer (4) and upper cladding layer (5).