摘要:
A laser diode is provided which includes a substrate, a laser diode chip bonded on the substrate through a sub-mount, and a monitor element formed on the sub-mount. A space between a rear cleavage face of the laser diode chip and the surface of the monitor element is connected by a solid state waveguide, and the surface of the solid state waveguide is covered by a light reflecting resin layer.
摘要:
A laser diode, which includes a substrate, a laser diode chip bonded on the substrate through a sub-mount, and a monitor element formed on the substrate, monitors laser light emitted from a rear cleavage face of the laser diode chip. The laser diode chip has its front cleavage face covered by a transparent resin. As a result, variations of the surface state of the front cleavage face are prevented.
摘要:
A semi-conductor laser unit is provided which includes a substrate, and a laser chip bonded on the substrate through a submount so as to project laser beam towards the outside from a front cleavage face of the laser chip. The front cleavage face of the laser chip is covered by a transparent resin material, with a front face of the transparent resin material being formed into a smooth face. As a result, the beam characteristics and resistance against the environment for the semi-conductor laser are improved.
摘要:
A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.
摘要:
The invention is directed to a semiconductor laser wherein the first embodiment is characterized in that the first upper portion cladding layer is assumed to be a double layer construction, the upper layer portion is assumed to be higher in carrier concentration than the lower layer portion, the series resistance component is restrained, so that the sequential direction voltage V.sub.F may be lowered without damaging the other characteristics such as oscillation start current I th and so on.
摘要:
A paper coating composition which comprises:(I) a pigment,(II) an aqueous binder, and(II) a resinous ingredient comprising (A) a water-soluble resin which is prepared by cross-linking (a) a condensation product of (al) an alkylenediamine or a polyalkylenepolyamine and (a2) an urea compound with (b) a cross-linking compound. This composition imparts excellent ink receptivity, excellent water resistance, and in particular, excellent anti-blister property to paper.
摘要:
An apparatus for assembling workpieces in which an assembling work is performed includes a workpiece setting jig, a setting station including a workpiece setting apparatus for setting a first workpiece on the workpiece setting jig, an assembling station including an assembling unit for assembling a second workpiece with the first workpiece on the workpiece setting jig, a welding station including a welding unit for welding the first and the second workpieces together, a discharging station including a discharging unit for taking the welded workpieces out of the workpiece setting jig, a charging station provided in a position which faces the setting station as seen in the direction of sending and withdrawing the workpiece setting jig. The charging station, the assembling station, the welding station and the discharging station being arranged in a circular form. A mechanism is provided for circulating the workpiece setting jig among the charging station, the assembling station, the welding station and the discharging station in sequence. A mechanism is provided for reciprocating the workpiece setting jig between the setting station and the charging station. The method of assembling workpieces includes disposing the charging station in a position facing the setting station, and disposing the charging station, the assembling station, the welding station, and the discharging station in a circular form to a side of the setting station.
摘要:
The present invention provides a semiconductor laser device which comprises a metallic stem, a cap mounted to one surface of the stem, a mounting block arranged to project from the one surface of the stem into the cap, and a semiconductor laser chip by the mounting block. The stem comprises a first stem member and a second member joined to the first stem member in lamination thereto. The first stem member is formed with a cutting line partially surrounding a portion of the first stem member. The mounting block is provided by bending the partially surrounded portion into the cap to leave a corresponding perforation in the first stem member.
摘要:
4-(3-Aryloxy-2-hydroxypropyl)piperazines bearing a carbamyl group in the 1-position are .beta.-adrenergic blockers. A typical example is 1-carbamyl-4-{3-[2-allyl-3-(2-carbethoxyaminoethyl)phenoxy]-2-hydroxypropyl}piperazine.
摘要:
Oxygenated sterylglycoside derivatives of the formula (I) wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each is hydrogen or lower alkanoyl, Y is ##STR1## and R.sub.5 is 4-methylpentyl, 3-ethyl-4-methylpentyl or 3-ethyl-4-methyl-1-pentenyl are useful for their hemostatic and capillary stabilizing effects.