Abstract: An inorganic article used as a container for holding a solution for crystal growth according to the present invention is provided by filling the pores of substrate having a porous inorganic structure with an inorganic material which has a melting point of 400.degree. to 900.degree. C. A liquid-phase epitaxy apparatus according to the present invention is comprised of a crucible made of the inorganic article or from a material selected from P-BN, quartz and sapphire and has an arrangement with less sliding contact. Thus, the dispersion of diffusive elements contained in a solution during the epitaxial growth is prevented. Accordingly, both the article and the apparatus of the present invention permit growth of crystals having high quality and less structural defects, thus contributing to the production of a semiconductor device made of materials having high vapor pressure.

Abstract: A phenylene oxide polymer composition comprising (1) a phenylene oxide polymer; (2) a styrene/ethylene butylene/styrene block copolymer; and (3) a hydrated metal oxide; wherein the ratio by weight of the phenylene oxide polymer to the styrene/ethylene butylene/styrene block copolymer ranges from 90:10 to 10:90 and the content of the hydrated metal oxide ranges from 50 to 300 parts by weight per 100 parts by weight of the total amount of the phenylene oxide polymer and styrene/ethylene butylene/styrene block copolymer. This composition shows a high fire retardancy and little fuming and is excellent in tensile strength, elongation, low-temperature brittleness and organic solvent resistance.

Abstract: A testing fixture for testing a transfer impedance of an electromagnetic wave shielding material including a pair of coaxial reducers opposed to each other, each of the coaxial reducers including a cylindrical outer conductor and an inner conductor disposed therein. Each of the outer conductors is provided with a flange at the outer side for engaging the pair of coaxial reducers. Contacting parts are positioned at an end of the opposing outer conductors. Outer connectors are positoned at the other end of the opposing outer conductors. Each of the inner conductors includes head parts positioned at the inside portions thereof and inner connectors positioned at the outside portions thereof. The contacting parts of the outer conductors and the head parts of the inner conductors support the electromagnetic wave shielding material. The outer connectors of the outer conductors and the inner connectors of the inner conductors couple coaxial cable to the testing fixture.

Abstract: An EL lamp has an EL light emitting part and a connector part which is connected to both electrodes of the EL light emitting part and is formed so as to be attachable to and detachable from a power supply outlet. The EL light emitting part is flat-plate-shaped and has a reinforcement to give to the EL lamp a mechanical strength against a bending load applied when repeatedly attaching and detaching the EL lamp to and from an outlet while the reinforcement is held by human fingers. Accordingly, the EL lamp is not easily broken by an external force, can be portable, and can withstand frequent attaching and detaching to and from a power supply outlet. The EL lamp can be constructed to enable changing of the illuminating direction of the EL lamp freely in desired directions. The lamp is convenient for use in an automobile having a power supply outlet with a recess into which a connector part of the EL lamp is engaged.

Abstract: It is disclosed a radiation resistant multiple fiber which is excellent in radiation resistance at the region of visible light, and therefore is suitable as an image transmitter of image scope, wherein a number of optical fiber elements each of which comprises a core composed of a pure silica glass and a cladding layer formed on the core and composed of a doped silica glass are mutually heat-fused, and said pure silica glass of the core having a chlorine content of lower than 1 ppm, and OH group content of lower than 1000 ppm, and also fluorine content of at least 100 ppm.

Abstract: A material for a light emitting element most suited for a light emitting diode or laser diode which emits visible light of 550 to 650 nm band wavelength. The material provides an at least two-layered structure composed of a GaAs substrate and a Sn doped InGaP layer developed on the substrate without forming a gradient layer therebetween. The mixed crystal composition of the Sn doped InGaP layer as expressed by the molar fraction of GaP is 0.50 to 0.75.According to the method for developing mixed crystals of InGaP, GaP and InP are dissolved in Sn to make a solution. The solution is allowed to come in contact with a GaAs substrate so that InGaP crystals are developed directly on the GaAs substrate without a gradient layer for coordinating the lattice constant formed on the GaAs substrate.

Abstract: A light emitting diode lamp comprises an insulated metallic board having a plurality of hollows thereon each of which has a light emitting diode mounted on the bottom thereof and a light-reflecting surface on the side wall thereof. A lens plate collects direct light from the light emitting diode and light reflected by the reflecting surfaces of each of the hollows. The lamp is suited as an automobile lamp, especially as a high mounted stop lamp.

Abstract: It is disclosed a light emitting diode lamp composing a window through which light is released forwardly, a plurality of light emitting diodes located at a corner of the window or behind the frame of the window, and a light reflector having a plurality of light reflecting faces whereby light emitted from the light emitting diodes is reflected toward the window. The lamp is suited as an automobile lamp, especially as a tail lamp.

Abstract: The present invention relates to a connector for connecting optical fiber ribbons to each other, each of ribbons including a plurality of optical fibers spaced in line, and a method of attaching the same. The connector comprises an alignment member for placing the optical fibers in the grooves formed therein, a deformable metal member disposed on the optical fibers in the grooves of the alignment member, and a ferrule incorporated at the front end pportion with both the alignment member and the deformable metal member and adapted at the rear end portion to retain the unexposed portion of the optical fiber ribbon. Accordingly, the optical fibers are fixedly held between the alignment member and the deformable metal member while the ribbon is fixedly held by the rear end portion of the ferrule. The front ends of the optical fibers are cut at the front end of the ferrule.

Abstract: The present invention relates to an energy transmission optical fiber which is a medium for transmitting high-energy beams within an ultraviolet range such as laser beams. Since an optical fiber according to the present invention comprises a core formed of pure silica and a clad having a graded index type distribution of refractive index and said clad is disposed on an interface between the core and the clad where many structural defects are generated, the transmission loss is not increased even after the transmission of high-energy beams for a long time. In addition, since the optical fiber according to the present invention comprises the core formed of pure silica having a high melting point, the high-energy beams can be transmitted without generating a melting fracture in the core.

Abstract: A wear sensor provided with a block incorporating one or more optical fibers for indicating that wear has occurred to the block, on the basis of a fact that the fibers have been severed on account of wear of the block.

Abstract: A super-thin fiberscope having a main scope body which comprises a plurality of multi-component glass light guide fibers for transmitting light to illuminate a target to be viewed, a silica glass image guide for transmitting an image of the target, and a thin-walled main tube made of an imide resin and enclosing the image guide and the light guide fibers. The main tube has an outer diameter of 0.25 mm to 0.6 mm and a wall thickness of 10 .mu.m to 30 .mu.m.

Abstract: A semiconductor light emitting device, such as a light emitting diode or laser, includes a substrate which is provided with a hole and a pn junction extending adjacent to and in parallel with the side wall of the hole. Thus, the side wall of the hole extends in a direction perpendicular to a main surface of the substrate. A pair of electrodes is provided such that current flows across the pn junction so that light emitted in a vertical direction which is perpendicular to the main surface of the substrate. The hole may be either a through hole or a bore hole. With the additional provision of a pair of resonators, there is provided a semiconductor laser.

Abstract: This invention provides a flame-retardant resin composition comprising:(A) about 100 parts by weight of a base polymer containing about 99 to about 20% by weight of a linear polyethylene and about 1 to about 80% by weight of a polyethylene-.alpha.-olefin copolymer having a melt flow rate (MFR) of about 1 to about 10 and a density of about 0.900 to about 0.850, said linear polyethylene having a MFR and a density both restricted to the range defined by a segment having points a, b, c and d at the corners thereof in the accompanying drawing, FIG. 1, showing the relationship between the MFR (according to ASTM D1238) and the density (according to ASTM D1505) of said linear polyethylene, and(B) about 50 to about 300 parts by weight of a hydrate of metallic oxide.

Abstract: Radioactive materials can be safely analyzed by an emission spectroscopic analyzer comprising an exciting device for exciting a radioactive material to be analyzed to emit light. The exciting device is enclosed in a radiation shielding wall. A detecting device detects the emitted light. The detecting device is located outside the radiation shielding wall. A light-transmitting device is provided between the exciting device and the detecting device such that the emitted light impinging on a first end of the light-transmitting device will be received at the detecting device as light having been transmitted through the light-transmitting device and emitted from a second end of the light-transmitting device. The light-transmitting device penetrates a hole made in the radiation shielding wall which has a sealing structure to prevent radiation leakage. The light-transmitting device penetrates the hole with a curvature.

Abstract: It is disclosed that an optical fiber conductor of glass type characterized in that the optical fiber conductor has a fiber-reinforcing layer which, at least in a desired region of the entire length thereof, is made of a charred material of an organic resin.

Abstract: An optical multiconductor of the silica glass type characterized in that the multiconductor comprises 10.sup.2 to 10.sup.7 optical fibers of the silica glass type fused to one another, each of the optical fibers comprising a core made of doped silica glass and occupying at least 20% of the fiber in cross sectional area, and a cladding layer made of a kind of silica glass and formed on the core, the core having a refractive index distribution satisfying the following expression:n2.gtoreq.n1+0.50(n0-n1)wherein n0 is the refractive index of the core at its center, n1 is the refractive index of the core at its outermost portion, and n2 is the refractive index of the core at a position centered about the axis of the core and having an average radius of 0.65r1, the r1 being an average radius of the core.The multiconductor is suited to use as the image transmitter of an image scope for industrial, medical or other uses.

Abstract: A driver in a transceiver for a common bus-type transmission system of a local area network includes a switching transistor for receiving a transmission data signal from a station and outputting a forward data signal to a bus, a diode for stopping data entry from a bus to the switching transistor, a first data detection circuit for detecting the presence of the transmission data signal, a second data detection circuit for detecting the presence of the forward data signal, a determination circuit for detecting the occurrence of the short circuit of either one of the switching transistor and the diode, and a controller for controlling the conduction between the switching transistor and the bus.