Abstract: There is provided an electronic apparatus connectable to a receptacle of an external electric device. The electronic apparatus includes: a substrate; an electronic component mounted on the substrate; an electric connector which is provided on one longitudinal end of the substrate, electrically connected with the electronic component, and is insertable into the receptacle of the external electric device; first and second spacers respectively provided on the opposite surfaces of the substrate; a metal case for covering the substrate, the electronic component, the electric connector, and the first and second spacers; and a resin protective cover for covering the metal case. The metal case is provided in such a manner that an electrical connection portion thereof required for electrical connection with the receptacle is left exposed. The metal case is in contact with and supported by the first and second spacers.

Abstract: An optical waveguide substrate with an optical fiber fixation groove, including an optical waveguide which contains a lower cladding layer on a base substrate, wherein the lower cladding layer has an optical fiber fixation groove and a core groove, and a weir is provided between the optical fiber fixation groove and the core groove. The optical waveguide substrate with an optical fiber fixation groove is produced by forming a lower cladding layer on a base substrate using a male stamp produced from a female stamp and then successively forming a core layer and an upper cladding layer thereon. The stamp for use in such a production process includes concave portions or convex portions, corresponding to the optical fiber fixation groove and the core groove, as well as a convex portion or a concave portion corresponding to the weir. An opto-electronic hybrid integrated module includes the optical waveguide substrate with an optical fiber fixation groove.

Abstract: An optical-electrical transceiver module is to connect an optical-electrical composite cable incorporating an optical fiber and an electric wire to a receptacle of external electrical equipment. The module comprises a base; an optical path conversion element provided on the base; a flexible printed circuit sheet provided on the optical path conversion element and having electrical wiring; a support plate provided on the base to support the flexible printed circuit sheet; an optical element provided on the flexible printed circuit sheet; and an electric connector. The flexible printed circuit sheet is extended over the support plate and the base. The base, support plate, and flexible printed circuit sheet are connected to the electric connector by insertion into the electric connecter.

Abstract: The invention provides a flexible optical waveguide in which an optical waveguide film is directly formed on a substrate without using an adhesive and which is excellent in flexibility of the optical waveguide film, including the substrate, and excellent in adhesiveness between the substrate and the optical waveguide film, as well as a process for producing the flexible optical waveguide in a simple and easy manner. The flexible optical waveguide includes a lower cladding layer, a core layer, and an upper cladding layer successively formed on a substrate and a surface of the substrate, on which surface the lower cladding layer is to be formed, has an arithmetic average roughness (Ra) of 0.03 ?m or higher.

Abstract: A flexible optical interconnection structure has a plurality of layers including an optical waveguide made of a core and a clad. The core is disposed to include a neutral surface that is not affected by expansion or contraction by bending. Alternatively, when the neutral surface is position outside the core, the core is disposed to satisfy ?y?0.03×R, in which ?y is a distance between the neutral surface and a surface of the core at a side near the neutral surface, and R is a curvature radius of an innermost surface of the flexible optical interconnection structure in the bent state.

Abstract: An optical fiber holder 7 which directs an angulated groove 6 in which an optical fiber 4 is disposed to a substrate 2 and overlays the angulated groove 6 on the substrate 2 may be formed first. Next, a guide 8 which guides the optical fiber holder 7 to the position where the optical fiber 4 and the optical device 3 are to be optically coupled to each other is formed on the substrate 2. Next, a 45-degree mirror is formed by dicing the optical fiber holder 7 and the optical fiber 4 together in a state in which the optical fiber 4 is disposed in the angulated groove 6. Finally, the optical fiber holder 7 is overlaid on the substrate 2, and the optical fiber holder 7 is guided by the guide 8.

Abstract: An optical circuit board which facilitates a mounting process and provides advantageous aspects of electric interconnection and optical interconnection. An optical circuit board comprises a flexible circuit board composed of a film having a flexibility; one or more electric interconnections provided at the flexible circuit board; one or more optical interconnections provided at the flexible circuit board; an optical transmitter for converting an electric signal supplied at a designated electric interconnection of the electric interconnections provided at the flexible circuit board into an optical signal; and an optical receiver for reconverting the optical signal emitted by the designated electric interconnection provided at the flexible circuit board into an electric signal and for outputting the reconverted electric signal to another electric interconnection.

Abstract: A mirror embedded optical waveguide according to the present invention comprises: a core; an angled cut face in the core; an adhesive layer on the angled cut face, the adhesive layer having approximately the same refractive index as that of the core; and a metal film on the adhesive layer, the metal film being formed by transfer.

Abstract: A combined optical and electrical transmission assembly includes a combined optical, electrical and power cable having an optical fiber, electrical wiring and a power line combined therein or a combined optical and electrical cable having an optical fiber and electrical wiring combined therein, and a combined optical and electrical transmission module that includes an electrical-to-optical conversion unit having a laser for converting electrical signals to optical signals and a driving IC for driving the laser, and/or an optical-to-electrical conversion unit having a photodiode for converting optical signals to electrical signals and an amplification IC for amplifying electrical signals from the photodiode. The combined optical and electrical transmission module is connected to both ends of the combined optical, electrical and power cable or the combined optical and electrical cable.

Abstract: An optical element amounted structure includes an optical element having an electrode such as a bump formed on a surface thereof, and a substrate having an electrode that is joined to the optical element formed on the surface. The structure of the electrode of the substrate has a substantially ring configuration or a substantially ring configuration a part of which is notched, and the optical element and the substrate are joined to each other in a configuration where a joining material such as a bump is inserted into an opening portion.

Abstract: An optical circuit board which facilitates a mounting process and provides advantageous aspects of electric interconnection and optical interconnection. An optical circuit board comprises a flexible circuit board composed of a film having a flexibility; one or more electric interconnections provided at the flexible circuit board; one or more optical interconnections provided at the flexible circuit board; an optical transmitter for converting an electric signal supplied at a designated electric interconnection of the electric interconnections provided at the flexible circuit board into an optical signal; and an optical receiver for reconverting the optical signal emitted by the designated electric interconnection provided at the flexible circuit board into an electric signal and for outputting the reconverted electric signal to another electric interconnection.

Abstract: A multimode wavelength multiplexing optical transceiver has: a plurality of light emitting elements that emit single-mode lights with wavelengths different from each other; and a multimode waveguide module that is operable to multiplex the emitted single-mode lights into a multimode light. The multimode waveguide module is a step-index type multimode waveguide module that is operable to reduce a low-order mode component of the multimode light.

Abstract: A polypropylene-based composite resin composition in which: (1) a complex viscosity ?* at 190° C. and an angular frequency (?) of 0.1 rad/s is 2000 Pa·s or more, (2) shear storage moduli G?100, G?10, G?0.1, and G?0.01 at 190° C. and angular frequencies (?) of 100, 10, 0.1 and 0.01 rad/s satisfy an equation (I) and an equation (II): log(G?100)?log(G?10)?0.6??(I) log(G?0.1)?log(G?0.01)?0.4??(II) and (3) a shear storage modulus G?0.0251 at 190° C. and an angular frequency of 0.0251 rad/s is 60 Pa or more. The polypropylene-based composite resin composition reveals less liability to cause failures such as short shot, burrs, surface formation failure, deformation and stringing even when a molding cycle in injection molding is shortened.

Abstract: Optical signals of which wavelength is multipled and which are transferred via an optical fiber 10 make incidence to refractive index distributing lens 34 and are converted into substantially parallel light beams, the optical signals converted make incidence into a polarized light conversion element 20a and are separated therein into two light beams and are emitted in a form of two linear polarized light beams of which polarization direction are aligned. The linear polarized light beams are separated by wavelength separation filters 28a, 28b and 28c, and make incidence with every two wavelength components either into a polarized light conversion element 20b or into polarized light conversion element 20c, and the optical paths for the light beams separated into two by the polarized light conversion element 20a are joined to form one light beam path for every waveform component.

Abstract: Linear polarized light beams are separated by wavelength separation filters 28a, 28b, and 28c, and make incidence with every two wavelength components either into a polarized light conversion element 20b or into polarized light conversion element 20c, and the optical paths for the light beams separated into two by the polarized light conversion element 20a are joined to form one light beam path for every waveform component. The optical signals of the four wavelength components are reflected either by a mirror 31b or by a mirror 31c, are converged by such as a hologram lens 40c, and, after being reflected by a mirror 32, are detected for every wavelength component by the photo detector array 36.

Abstract: There are disclosed a polypropylene composition for automotive parts which has a melt index at 230° C. and at 2.16 kgf of at least 30 g/10 minutes and which comprises 55 to 60% by weight of (1) propylene/ethylene block copolymer; 20 to 25% by weight of (2) rubber comprising a styrene/ethylene/propylene/styrene block copolymer and/or a styrene/ethylene/1-butene/styrene block copolymer and an olefinic elastomer; and 18 to 23% by weight of (3) talc, and also an automotive part which comprises the above polypropylene composition.

Abstract: Optical signals of which wavelength is multipled and which are transferred via an optical fiber 10 make incidence to refractive index distributing lens 34 and are converted into substantially parallel light beams, the optical signals converted make incidence into a polarized light conversion element 20a and are separated therein into two light beams and are emitted in a form of two linear polarized light beams of which polarization direction are aligned. The linear polarized light beams are separated by wavelength separation filters 28a, 28b and 28c, and make incidence with every two wavelength components either into a polarized light conversion element 20b or into polarized light conversion element 20c, and the optical paths for the light beams separated into two by the polarized light conversion element 20a are joined to form one light beam path for every waveform component.

Abstract: Optical signals of which wavelength is multipled and which are transferred via an optical fiber 10 make incidence to refractive index distributing lens 34 and are converted into substantially parallel light beams, the optical signals converted make incidence into a polarized light conversion element 20a and are separated therein into two light beams and are emitted in a form of two linear polarized light beams of which polarization direction are aligned. The linear polarized light beams are separated by wavelength separation filters 28a, 28b and 28c, and make incidence with every two wavelength components either into a polarized light conversion element 20b or into polarized light conversion element 20c, and the optical paths for the light beams separated into two by the polarized light conversion element 20a are joined to form one light beam path for every waveform component.

Abstract: Provided is a method for producing blow moldings having a relatively large size through blow molding by use of a simple facility. The method including the steps of feeding a melt parison of crystalline resin into the space between molds, clamping the molds, blowing a pressurized fluid into the interior of the parison so as to cause the parison to be into close contact with the inner surfaces of the molds and to solidify the parison, wherein, while the parison and the mold inner surfaces are in close contact, the temperature of inner surfaces of the molds is maintained at a temperature from a temperature 10° C. lower than the crystallization temperature of the crystalline resin to the melting point of the resin, and the parison is removed from the molds after the parison is cooled through introduction thereinto or discharge therefrom, during or after blowing-in of the pressurized fluid, of a cooling medium not higher than room temperature.

Abstract: There are provided a highly rigid propylenic resin which has a melt index MI in the range of 0.1 to 1.2 g/10 minutes as determined at 230.degree. C. under 2.160 kg load and also satisfies a relationship between the MI and the elongational viscosity ?Y(Pa.s)!, said relationship being represented by the expression2.0.times.10.sup.5 .times.MI.sup.-0.68 .ltoreq.Y.ltoreq.8.0.times.10.sup.5.times. MI.sup.-0.68 ;and a blow molded article made from the above resin. The propylenic resin has favorable resistance to draw down and can produce a large-sized and lightweight blow molded article excellent in rigidity, dimensional stability and heat resistance.