Abstract: The present invention provides a polarization mode dispersion compensator comprising: a compensating portion which includes a first polarization controller which performs polarization conversion on light propagating along an optical transmission line and a DGD (Differential Group Delay) emulator which adds a DGD to the light which is polarization-converted by said first polarization controller, said compensating portion being for compensating polarization mode dispersion which occurs in the light while the light propagates along the optical transmission line; a second polarization controller for performing polarization conversion on the light, of which the polarization mode dispersion is compensated, so that a state of polarization of the light can be one linear polarization; a polarization beam splitting portion for splitting the light, which is polarization-converted by said second polarization controller, into the one linear polarization and an other linear polarization which is orthogonal to the one linea

Abstract: In the sample-and-hold circuit for laser power detection signal and servo signal, the sample-and-hold operation timing is controlled to set by monitoring the output from the sample-and-hold circuit. In the invention of this application, the sample-and-hold timing is changed to be larger or smaller than the estimated timing, and reference is made to the result of the monitoring, thus determining the optimum timing. The sample-and-hold timing is controlled to fix to this optimum value.

Abstract: A PMD emulator configured by connecting in this order: an input-side optical fiber 71 for receiving light to be measured; a first polarization rotating portion 73 including M DGD sections 76 (M is an integer equal to or more than 2) concatenated by (M?1) polarization rotators 80, one DGD section being arranged at each end of said first polarization rotating portion; an arbitrary-arbitrary polarization controller 75 for changing any state of polarization into any other state of polarization, a second PMD rotating portion 74 configured in the same way as the first polarization rotating portion 73 an output-side optical fiber for outputting the light to be measured.

Abstract: A gusset bag having side films folded inwardly and an opening portion at the upper edge of the bag, said gusset bag further having a reinforcing resin layer at least on the side edge.

Abstract: A self-standing bag (1) comprising a bag body (2), a spout (3), and a reverse-recessed frame (4), wherein the spout (3) is provided at the upper portion of the bag body (2) composed of body films (2c, 2c) and a bottom film (2d) folded down on the bottom portion in a reverse V-shape, and integrally formed with the reverse-recessed frame (4) starting at the upper edge (2b) toward both side edges (2a, 2a) of the bag body (2), the bag body has fusion bonding parts at the lower edges and a part of each side edge of the bag body (2) which are fusion bonded to each other so that at least the bottom film (2d) can be fixed to the body films (2c, 2c).

Abstract: An object is to accurately measure the Stokes parameters, without the occurrence of polarization fluctuations or PDL during the splitting of the incident light. When the incident light is made incident on a first-stage prism, the light is split into two first splitting light rays. Next, the first split light rays are respectively incident on a pair of prisms of a second stage. Each of the pair of first split light rays is split into two rays by a second-stage prism, to obtain four second split light rays.

Abstract: A self-standing bag (1) having a spout (3) on a bag body (2), characterized in that both side edges (2a, 2a) and an upper edge (2b) of the bag body (2) are sealed by an edge sealer (4) of thermoplastic resin covering the outer surfaces of the edges, and the spout (3) is formed integrally with the edge sealer (4).

Abstract: A vicinity search using register point data in a designated area reduces search time. The vicinity search data include at least category information, names of register points and country information. The search device conducts the vicinity search by specifying any one of category information to which the register points belong, names of the register points and country information, or a combination, by option and display. The search device further uses category information with flags representing the presence and absence of the register point data, whereby the register point data are searched by referring to the flags.

Abstract: An object is to accurately measure the Stokes parameters, without the occurrence of polarization fluctuations or PDL during the splitting of the incident light. When the incident light is made incident on a first-stage prism, the light is split into two first splitting light rays. Next, the first split light rays are respectively incident on a pair of prisms of a second stage. Each of the pair of first split light rays is split into two rays by a second-stage prism, to obtain four second split light rays.

Abstract: Between a lens of a collimator and a retro-reflector as a total reflecting element, a prism, a polarizer, a Faraday rotator and a linear retarder are arranged in the order. The core/clad section serving as an input optical fiber of the collimator has its optical axis coincident with an optical axis of the lens. When the light exited the collimator reaches the retro-reflector, the outgoing light reflects deviated by a spacing Y, the returning light of which is refracted by the prism and incident on the core/clad serving as an output optical fiber of the collimator.

Abstract: Between a lens of a collimator and a retro-reflector as a total reflecting element, a prism, a polarizer, a Faraday rotator and a linear retarder are arranged in the order. The core/clad section serving as an input optical fiber of the collimator has its optical axis coincident with an optical axis of the lens. When the light exited the collimator reaches the retro-reflector, the outgoing light reflects deviated by a spacing Y, the returning light of which is refracted by the prism and incident on the core/clad serving as an output optical fiber of the collimator.

Abstract: An optical variable attenuator constituting an optical component comprises a polarizer, a Faraday rotator, a linear phase shifter, and an analyzer which are successively arranged in the direction of light propagation. The thickness of the linear phase shifter in the direction of light propagation and the angle which the crystal optical axis of the linear phase shifter forms with the transmission axis of the analyzer are set as appropriate so that the linear phase shifter compensates for wavelength and temperature dependences of the Faraday rotator, permitting the optical variable attenuator to exhibit favorable light-attenuation-wavelength and temperature characteristics.

Abstract: A key top attachment structure which makes the key-top attachment work easy, prevents the key top from being taken off from the outside, and suppresses looseness of the key top. A spring (11) provided with a rectangular hole (14), and lock portions (12A, 12B and 13) in which corresponding stoppers (22A, 22B and 23) of a key top (2) are to be locked respectively, are provided in a casing (1) of a small-sized electronic equipment such as an inter-call receiver or the like. A protrusion (21) which pushes the spring (11) at the time of attachment, a protrusion (24) which abuts against the spring (11) after attachment, a protrusion (25) which turns on a switch (3) on a printed board (4), and the stoppers (22A, 22B and 23) are provided in the key top (2).

Abstract: A closed loop is formed by loop antenna elements which equivalently function as inductance, a capacitor inserted in such a manner as to divide the loop antenna into the loop antenna elements, and an impedance-matching dividing element for tuning the antenna and establishing matching with a high-frequency circuit side. A subsidiary substrate with the capacitor mounted thereon is fixedly installed by a retaining pawl of an antenna holder, and is connected to the loop antenna elements by being soldered thereto at a pair of lands on the subsidiary substrate. As a result, it is possible to improve the effective gain of the antenna and effectively utilize the substrate space.

Abstract: Provided is a consumable electrode type arc welding method and device in which stable welding can be performed at a high speed for a welding gap greater than a thickness of a base metal and the like, and welding conditions are automatically changed according to the welding gap along a welding line to perform the stable welding. A first base metal extended vertically and a second base metal which has an upper end positioned in a middle portion of the first base metal and is provided along the first base metal are welded together. The first and second base metals have a thickness of 2.8 mm, and an arc is generated toward an upper end portion of the second base metal from obliquely above on a side opposite to the first base metal. The second base metal is melted to be a part of a weld metal. An amount of the second base metal to be melted is increased or decreased according to a welding gap detected by a laser sensor.

Abstract: A center shaft (2a) for holding a key top (1), and springs (2b) are provided in a casing (2) of a small-sized electronic equipment such as an inter-call receiver. The springs (2b) are provided so as to extend from the peripheral portions toward the center shaft (2a), and holes are formed in the springs (2b) respectively. The key top (1) is provided with a stopper nail (1a), first protrusions 1b and second protrusions 1c. The protrusions (1c) of the key top (1) for pushing switches (3) are inserted through the holes of the springs (2b) respectively, and the stopper nail (1a) of the key top (1) is engaged with the center shaft (2a) acting as a fulcrum during the seesawing operation of the key top (1). Thus, the key top (1) is held in a stable manner. The existence of the center shaft (2a) prevents simultaneous depression of the two switches (3).

Abstract: A small motor holding device in an individual Stalling receiver is designed, in which, even when the casing is shocked, the small motor is scarcely shocked, and vibration informing of the reception of a calling signal is transmitted positively to the casing, and which can be assembled with high work efficiency. A small motor is held in a motor holder of elastic material. The motor holder is coupled to a printed circuit board with the engaging section of the motor holder engaged with the engaging/receiving section of the printed circuit board. The motor holder is detachably press-fitted in a holding frame which is fixedly formed on the inner surface of a casing.

Abstract: Provided is a consumable electrode type arc welding method and device in which stable welding can be performed at a high speed for a welding gap greater than a thickness of a base metal and the like, and welding conditions are automatically changed according to the welding gap along a welding line to perform the stable welding. A first base metal extended vertically and a second base metal which has an upper end positioned in a middle portion of the first base metal and is provided along the first base metal are welded together. The first and second base metals have a thickness of 2.8 mm, and an arc is generated toward an upper end portion of the second base metal from obliquely above on a side opposite to the first base metal. The second base metal is melted to be a part of a weld metal. An amount of the second base metal to be melted is increased or decreased according to a welding gap detected by a laser sensor.

Abstract: The invention is to a non-woven fabric sheet for a storage battery separator. The sheet has an excellent property of holding electrolyte by using conjugate fibers having a specific sectional form. The sheet comprises an ethylene copolymer having a specific structure which can introduce a desirable amount of sulfo groups efficiently under mild reaction condtions. Conjugate fibers having a split sectional form include a first component and a second component having a radial arrangement. The conjugate fibers are obtained by forming an ethylene based random copolymer containing a unit represented by a formula --CH.sub.2 CH(COOH)--, with polypropylene. Subsequently, a non-woven fabric sheet of a thermally bonding type is obtained by mixing the conjugate fibers with polypropoylene fibers. Subsequently, a non-woven fabric sheet for a storage battery separator is obtained by sulfonating the non-woven fabric sheet using gas such as SO.sub.3 to form a unit of the formula --CH.sub.2 C(SO.sub.3 H)(COOH)--.

Abstract: Discloses a heat-insulating structure for combustion equipment of such a type that a burner element of combustion equipment is insertedly disposed at an installation opening of thermal equipment such as a boiler, with a view to simplified structure and enhanced workability. In combustion equipment (B) having a burner element (20) insertedly disposed at the installation opening (1) of the thermal equipment (A) via the support frame (30) a thermal insulator (50) flush with the burner element (20) on the thermal equipment (A) side is disposed between the installation opening (1) and the outer side face of the support frame (30).