Abstract: An insulation film (silicon dioxide film) is laminated on a platform substrate of Si, etc., and a transmitting unit wiring pattern and a receiving unit wiring pattern are provided on the insulation film. Although a base intruded in a convex shape is provided at the bottom of a light emitting device (LED) of the platform substrate, this base is not provided at the bottom of a light receiving device, and the insulation film under the light receiving device becomes thick. A groove is formed in a waveguide, and a WDM filter is mounted. A diamond or SiC layer can also be provided beneath the insulation film to improve the insulation resistance, and a conduction layer is provided beneath the diamond or SiC layer. Electrical crosstalk is suppressed by grounding the conduction layer. Optical crosstalk is improved by locating the LED at the entrance/exit of the WDM filter and the light receiving device on the opposite side.

Abstract: A tongs apparatus includes an upper frame suspended from a crane, a pair of first arms journaled on the upper frame, a pair of second arms journaled on the first arms and disposed to cross each other, and a supplemental-holding-force apparatus. The supplemental-holding-force apparatus comprises a chain motor; a chain wound and unwound by the chain motor; a ring-shaped member connected to the chain and having an elongated hole; and a lifting metal fitting having a guide pin slidably engaged with the ring-shaped member. The chain is wound or unwound by the chain motor in order to move the ring-shaped member vertically to thereby supplement a holding force generated through closing of the second arms.

Abstract: In a hybrid lens forming method for transferring an aspherical composite layer made of an ultraviolet-curing resin, which is curable by irradiation with ultraviolet rays, onto one surface of a convex lens by using a forming die, the forming die is made of a material which transmits ultraviolet rays, and the aspherical composite layer is transferred onto the convex lens by applying ultraviolet rays from the side of the forming die and curing the ultraviolet-curing resin with ultraviolet rays transmitted through the forming die.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: An optical module including a substrate, an optical waveguide formed on the substrate, and an optical element mounted on the substrate so as to be optically coupled to an end of the optical waveguide, for performing conversion between light and electricity. The optical module further includes a transparent resin for covering at least an optical coupling portion between the optical waveguide and the optical element, and a thermoplastic resin for covering only the optical element and its periphery including the transparent resin to seal the optical element.

Abstract: A wavelength division multiplexing optical device includes a cladding layer formed on a waveguide substrate, a first optical waveguide embedded in the cladding layer, a second optical waveguide embedded in the cladding layer and connected at one end thereof to an intermediate portion of the first optical waveguide, and an insertion groove formed in the waveguide substrate and the cladding layer so as to extend across a connected portion of the first and second optical waveguides. The wavelength division multiplexing optical device further includes first and second wide grooves formed in the cladding layer so as to cover opposite end portions of the insertion groove and open to the opposite side surfaces of the cladding layer, and a wavelength selecting filter inserted in the insertion groove.

Abstract: A photodetector module including a support substrate having a main surface, an optical waveguide mounted on the support substrate and having an end face for emerging a light beam along a first optical path, and a photodetector mounted on the support substrate so that the light beam emerged from the end face of the optical waveguide is incident on the photodetector, the photodetector having a photodetecting portion responding to the light beam incident on the photodetector. The photodetector module further includes a first inclined surface formed on a substrate of the photodetector for refracting the light beam along the first optical path to a second optical path, and a second inclined surface for totally reflecting the light beam along the second optical path to a third optical path substantially perpendicular to the photodetecting portion.

Abstract: An optical transmission terminal device including a printed wiring board and an optical module mounted on the printed wiring board. The optical module includes an optical component mounting substrate, a photoelectric converter mounted on the substrate, a first optical fiber having one end optically coupled to the photoelectric converter, and a ferrule mounted on the substrate so as to partially project from the substrate. The other end portion of the first optical fiber is inserted and fixed in the ferrule. A wiring pattern formed on the printed wiring board and a feed electrode formed on the substrate are connected together by wire bonding. An optically coupled portion between the photoelectric converter and the first optical fiber and a connected portion between the wiring pattern and the feed electrode are commonly covered with a transparent resin.

Abstract: The present invention relates to novel huperzine A derivatives of formula (II), wherein Y is ##STR1## or R" and Y together form .dbd.CH; R is (C.sub.1 -C.sub.5) alkyl, ##STR2## wherein n is 0 or 1, X is H, (C.sub.1 -C.sub.5) alkyl; (C.sub.1 -C.sub.5) alkyloxy; nitro, halogen, carboxy, alkyloxycarbonyl, hydroxymethyl, hydroxy, amino substituted by bis-(C.sub.1 -C.sub.5) alkyl; --(CH.sub.2).sub.m COOZ, wherein m=0-5, Z is H or (C.sub.1 -C.sub.5) alkyl; --CH.dbd.CH--G, wherein G is phenyl, furanyl, carboxy, alkyloxycarbonyl; and dihydro- or tetrahydro-pyridyl substituted by (C.sub.1 -C.sub.5) alkyl at the nitrogen atom; R' is H, (C.sub.1 -C.sub.5) alkyl, pyridoyl, benzoyl substituted by (C.sub.1 -C.sub.5) alkyloxy; R" is H or (C.sub.1 -C.sub.5) alkyl; processes for their use as acetylcholinesterase inhibitor.

Abstract: The present invention relates to an apparatus for transferring a liquid capable of accurately performing detection of a liquid level using a pipetting probe even in a case of a high electric conductivity of a in-flow-passage moving fluid which transmits sucking and discharging operation of a syringe (107) to the pipetting probe (100, 400, 500, 600). The probe has a liquid level sensing electrode (103, 401, 501, 601) and an inner tube (102, 402, 502, 602). The liquid level sensing electrode capable of contacting with a liquid to be pipetted is electrically separated from an inner tube filled with the moving fluid, and the both are insulated by an electric insulating member (104B, 403, 503) between them. A container (111) containing the liquid to be pipetted is held by a container holder (112), and a liquid level can be detected by change in an electrostatic capacitance between the container holder and the liquid level sensing electrode of the probe when the probe is moved downward.

Abstract: An optical transmission module which can provide hermetic sealing with reliability, is low in cost and excellent in mass productivity and a method of producing such an optical transmission module is provided. A sealing material is affixed to a cover section in advance. The sealing material is in the form of a film formed by screen printing along the joining portion between a body section and the cover section and having a thickness matching the amount of gap between the body section and the cover section at the joining portion. A conversion device is received in a recess of the body section, and an optical fiber is inserted into the body section from outside along a stepped portion and connected to the conversion device. With the cover section placed on the body section, the two are heated. As the sealing material, soldering paste is used, for example.

Abstract: An optical processing device for converting a wavelength of an optical signal comprises an optical processing unit supplied with an input optical beam carrying thereon one or more optical signals with respective wavelengths that are different from each other, the optical processing means being further supplied with a control optical beam having a stabilized reference wavelength and selecting the optical signal that has a first wavelength and outputting the same with a second wavelength that is specified by the reference wavelength; and a control unit for controlling the optical processing unit by specifying the first wavelength of the optical beam to be selected.

Abstract: A film transfer apparatus includes an apparatus casing having a feed-core support shaft for detachably mounting a feed core and a take-up core support shaft for detachably mounting a take-up core. The support shafts respectively include a transmission member for causing the feed core to provide a film ribbon take-up speed higher than a ribbon feed speed of the feed core. For slippably coupling the feed core rotation and the take-up core rotation, a slip coupling mechanism is provided. This mechanism is constituted by an engaged portion of the take-up core for engagement with a mating engaging portion of the take-up core support shaft. The engaged portion is elastically deformable to a non-transmission condition with application thereto of a force exceeding a predetermined level. Further, the engaged portion is provided with a mechanical strength smaller than the engaging portion.

Abstract: An optical processing device for converting a wavelength of an optical signal comprises an optical processing unit supplied with an input optical beam carrying thereon one or more optical signals with respective wavelengths that are different from each other, the optical processing means being further supplied with a control optical beam having a stabilized reference wavelength and selecting the optical signal that has a first wavelength and outputting the same with a second wavelength that is specified by the reference wavelength; and a control Unit for controlling the optical processing unit by specifying the first wavelength of the optical beam to be selected.

Abstract: A linear feeding system comprises a DC motor with brush, a lead screw integrally arranged as the rotational shaft of the DC motor, and a nut member screwed on the lead screw. This linear feeding system further comprises a magnet installed on the rotational shaft of the DC motor, which is provided with a plurality of N-pole and S-pole magnets being magnetized alternately in the circumferential direction, and a magnetoresistive effect sensor fixedly arranged to face this magnet. With this structure, it is possible to provide a simply structured, small linear feeding system capable of performing a high precision high-speed feeding operation at low costs.

Abstract: A translating apparatus for an optical pickup device comprises an optical pickup device for radiating an optical disc with a light beam, a rack member attached to the optical pickup device, a supporting device having a guide portion for guiding the optical pickup device along a diametrical direction of the optical disc, and a translating device including a gear attached to the supporting device and meshed with the rack member, a drive apparatus for rotating the gear and a releasing mechanism for releasing the gear and the rack from being meshed with each other when the optical pickup device is translated beyond a predetermined translating range.

Abstract: An optical bandpass filter comprises a waveguide region for guiding an optical beam from an input end to an output end, a clad structure provided above and below the waveguide region for confining the optical beam therein, a plurality of quantum well boxes formed in the waveguide region with respectively different quantum levels for selectively absorbing an optical component in the incident optical beam that causes a resonant absorption with the quantum level of the quantum well box, a barrier region provided in the waveguide region for surrounding each of the plurality of quantum well boxes with respect to all of three-dimensional directions and comprising a material having a second band gap that is substantially larger than said first band gap, and window means provided on the clad structure for directing a control optical beam such that the control optical beam irradiates the plurality of quantum well boxes.

Abstract: A semiconductor optical waveguide comprises a substrate of a semiconductor material doped to a first conductivity type, a multiple quantum well layer provided on the substrate for guiding an optical beam, a clad layer doped to a second conductivity type and provided on the multiple quantum well layer for confining the optical beam, a first electrode provided on the upper major surface of the clad layer for injecting carriers of a first type into the quantum well layer, and a second electrode provided on the lower major surface of the substrate for injecting carriers of a second type into the quantum well layer, wherein multiple quantum well layer comprises an alternate stacking of: a quantum well layer having a composition set to provide a smallest band gap that is possible under a constraint that the quantum well layer maintains a lattice constant with the substrate and a thickness set with respect to the optical energy of the optical beam such that a discrete quantum level of carriers is formed in the quant

Abstract: A cloth roller replacement system for at least one weaving machine, includes an actuating system for removing a full cloth roller from the machine and then installing an empty cloth roller in its place. The system further includes an instrument for measuring a fabric take-up quantity of the machine, a device for presetting a timing for preparation, and a controller for preliminarily making the actuating system ready for replacement at the preset timing for preparation, and then controlling the actuating system to perform the cloth roller replacement without stopping the machine.