Abstract:
A case body composed of upper and lower halves having a main wall in which there is defined at an intermediate portion thereof a pair of drive shaft insertion holes in right and left portions thereof, and the case body includes two pairs of upper and lower flange members inwardly projected from inner peripheral portions of the drive shaft insertion holes continuous with the main wall. A name plate made of a materials harder than the plastic material of the case body, is attached to an outer surface of the main wall including the right and left drive shaft insertion holes, and the name plate has one or more indexes formed on the outer surface thereof and has a pair of right and left shaft insertion openings defined therein. The positions of the shaft insertion openings correspond to the drive shaft insertion holes defined in the case body.
Abstract:
A semiconductor laser device is provided which is constituted by semiconductor materials so as to emit laser light from a cavity end facet, the laser light being excited in a waveguide within an active layer sandwiched between a pair of cladding layers, wherein a window layer made of a semiconductor material having a band gap greater than that of the active layer is formed on the cavity end facet from which the laser light is emitted, so as to have a thickness sufficient to prevent local generation of crystal defects by lattice mismatching between the semiconductor material of the window layer and the semiconductor materials at the cavity end facet. There is also provided a method for producing such a semiconductor laser device with high efficiency.
Abstract:
A light wavelength converter which includes a laser beam source for radiating fundamental waves, a first optical waveguide formed on a substrate so as to convert the fundamental waves into harmonics which are radiated through the substrate, a grating coupler provided on the substrate so as to receive the harmonics propagated through the substrate, and a second optical waveguide formed on the substrate, the second optical guide being connected to the grating coupler so as to radiate the harmonics outside.
Abstract:
A method for preparing a clear under coat on a concrete substrate by applying onto a coating composition comprising a solvent type synthetic resin varnish and organic or inorganic pigment microparticles having an average diameter of 5 .mu. or less uniformly dispersed in the varnish in an amount which is enough to give a pigment volume concentration of 5 to 50, the difference in mean refractive index of the microparticles and synthetic resin being 0.01-0.40.
Abstract:
Disclosed is an optical pumping-type solid-state laser apparatus in which a semiconductor laser device is used as a light source for optical pumping. The solid-state laser apparatus includes first and second photodetectors. The former detects the amount of light emitted from the semiconductor laser device, and the latter detects the amount of laser light transmitted through a filter plate which has the same light-absorbance characteristics as that of the solid-state laser. In accordance with the detected results, a driving circuit drives the semiconductor laser device to obtain a laser beam with an appropriate output level and a temperature regulator regulates the temperature of the semiconductor laser device so that the wavelength of the laser light to be emitted therefrom is accurately adjusted to be the same as that of the light to be efficiently absorbed by the solid-state laser. The laser beam with the accurately adjusted wavelength is used for optically pumping the solid-state laser.
Abstract:
A light wavelength converter comprising a substrate that is made of a material attaining a non-linear effect; an optical waveguide that is formed within said substrate; a light source that irradiates said optical waveguide with a pair of lights having a fundamental waveguide, said pair of lights being propagated within said optical waveguide and intersecting each other within said optical waveguide to thereby generate a second harmonic light; and a light deflection means that changes the intersection angle between the pair of waveguiding lights based on an electric signal that is input into said light deflection means, whereby, the phase matching condition of a pair of incident laser beams can be readily satisfied and, even when the ambient temperature changes, the second harmonic light can be stably generated.
Abstract:
A wet-process stack gas purification method and apparatus wherein stack gas is scrubbed by bubbling it into a first scrubbing liquid while maintaining the level of the first scrubbing liquid. The above scrubbed gas is subjected to a counter-current contact with a second scrubbing liquid in a scrubbing tower to further purify the gas. The method and apparatus can attain a highly remarkable decontamination effect, and the apparatus is simple in structure and small in size.
Abstract:
A toilet seat structure capable of automatically feeding a seat covering paper onto a toilet seat substantially comprises a seat covering paper roll disposed at the rear end of a toilet seat body, a seat covering paper feeding mechanism which is provided with a press plate, a seat covering paper tearing mechanism, a control unit for controlling the seat covering paper feeding mechanism and the seat covering paper tearing mechanism and tension applying means for applying tension to the seat covering paper, wherein the seat covering paper which is subjected to tension is cut by applying a pressure thereto by means of the press plate. Due to such construction, the tearing edge of the press plate can be formed in a round shape so that wear of the cutting edge which is generated through the tearing operation can be miminized whereby maintenance or repairing can be also minimized.
Abstract:
The invention eliminates polarization problems and feeder waveguide loss in a miniature microwave transmitter/receiver. This is done by providing a massive heat sink, metal housing with a primary radiator which is rotatably mounted on the end of the housing. Polarization is accomplished by rotating the radiator on the housing. Inside the housing there is a hybrid of integrated circuits mounted on internal parts of the housing which provide both heat sinking and waveguide functions.
Abstract:
An external cavity type semiconductor laser apparatus comprising a semiconductor laser device and an external reflector, which are mounted on a single mounting base with a distance therebetween, wherein laser light from the light-emitting rear facet of the laser device is reflected by the reflector and returns to the laser device, the coefficient of linear expansion of the mounting base being smaller than that of Cu and being greater than those of both the laser device and the reflector.