摘要:
An optical disc comprises a resin disc substrate, a recording medium layer formed on the disc substrate, a high purity of transparent layer, and a transparent protective resin layer. The transparency of the transparent layer is larger than that of the transparent protective resin layer. A laser beam is focused on the recording medium layer through the transparent protective layer and the transparent layer. The transparent layer is a transparent adhesive layer or an air layer. The focused laser beam is not affected by foreign matter in the vicinity of the recording medium layer due to the high transparency of the transparent layer on the recording medium layer.
摘要:
There is provided an optical disc of high reliability, with the recording film protected from deterioration. The optical disc of this invention is produced by forming a tellurium suboxide film or optomagnetic recording film on a substrate made by injection molding from a polycarbonate resin. The substrate is made from a polycarbonate resin containing a phosphite ester-based antioxidant in a specific low amount.
摘要:
There are provided acrylic plastic lenses having a wide range of refractive indices as well as excellent physical and optical properties by polymerization of specific acrylic monomers in the presence of a photopolymerization initiator and a thermal polymerization catalyst.
摘要:
A flow restrictor includes a housing having a chamber defined therein which is divided into two pressure chambers by means of a partition wall. An umbrella-shaped one-way check valve, for permitting or blocking fluidic communication between the two pressure chambers, and an orifice for restricting the fluidic communication between the two chambers, are coaxially arranged on the partition wall so as to decrease the size of the flow restrictor.
摘要:
A signal recording disk having an adhesive resin layer formed on a recording layer. The adhesive resin layer contains at least an epoxy group-containing compound, thereby preventing the recording layer from being degraded for a long period of time.
摘要:
A chip film capacitor laminated at both sides with vapor coated metal electrodes and heat resistant films of heat resistant resin dielectrics, the laminated body having at both sides common metal electrode element, which is characterized by providing no lead wire and being soldered directly onto a substrate.
摘要:
An epoxy resin composition for encasing semiconductive devices comprising a homogeneous mixture of a cresol novolak type epoxy resin and phthalic anhydride as a curing agent, the amount of phthalic anhydride being in excess of the equivalents of epoxide groups, a derivative of imidazole as a curing accelerating agent, and remainder being mineral filler.
摘要:
A vacuum operated valve mechanism for controlling transmission of fluid to servo means for emission control for an internal combustion engine or reducing emissions from the engine, including a single housing, a first and second diaphragm member, a first and second piston member, a pilot valve member and a working valve member.
摘要:
A compound valve device comprises a body member, a first valve member being located in the body member and controlling the fluid communication between a first input port and a first output port, and a second valve member being located in the body member and controlling the fluid communication between a second input port and a second output port. The two valve members operate in sequence, without a significant difference in time in response to one signal pressure.
摘要:
A gas filter device, adapted to be installed between an exhaust emission control device and an intake manifold of an internal combustion engine for filtration of the intake manifold gases which pass to the control device upon variations in vacuum, is comprised of a filtering chamber having an inlet port for connection to the intake manifold and an outlet port for connection to the control device, a first filter element positioned in the chamber and including glass fiber, metallic wire, and sintered bronze, a second filter element positioned in the chamber between the outlet port and the first filter element and made of non-woven cloth having a fine texture, a retaining late located between the inlet port and the first filter element and having multiple passageways, and a hat-shaped separating disc having multiple passageways and a head portion installed between the first filter element and the second filter element for keeping the second filter element away from the first filter element.