摘要:
An optical disk apparatus includes a carriage, a plurality of objective lens support portions, and a plurality of magnetic field generating means. The carriage is placed to oppose an optical disk and held to be reciprocally movable between an outer peripheral portion of the optical disk and its central portion. Each of the objective lens support portions has an objective lens elastically supported by an elastic member. The magnetic field generating means move each of the objective lenses in a direction perpendicular to the surface of the optical disk and a radial direction of the optical disk. Some of the magnetic field generating means which are used, in pairs, for the objective lens support portions are shared by the plurality of objective lens support portions.
摘要:
A laser device including a plurality of oscillating means for oscillating a plurality of laser lights being continuous lights and having frequencies different from each other, respectively, multiplexing means for multiplexing, after amplifying or without amplifying, the respective laser lights oscillated from the respective oscillating means at a predetermined position to generate a multiplexed light, and phase control means for controlling the phase of each of the laser lights so that a peak in output of the multiplexed light repeatedly appears at predetermined time intervals at the predetermined position (so that the same pulse temporal waveform repeatedly appears at predetermined time intervals).
摘要:
A photoelectric transducer (10) including: a semiconductor layer (13); and a photonic crystal (21) formed inside the semiconductor layer, the photonic crystal being formed by providing nanorods (19) inside the semiconductor layer, each of the nanorods having a refractive index lower than that of a medium of the semiconductor layer, the nanorods being provided two-dimensionally and periodically at a pitch of not less than λ/4 nor more than λ, where λ is a wavelength of a peak of resonance caused by the photonic crystal, the photoelectric transducer satisfying the following formula: 0.2QV≦Qα≦5.4QV where Qv is (a) a Q value which indicates a magnitude of an effect of resonance caused by coupling between the photonic crystal and an external world and (b) in proportion to a reciprocal of a coefficient κV indicating a strength of the coupling between the photonic crystal and the external world, and Qa is (a) a Q value which indicates a magnitude of an effect of resonance caused by the medium of the semiconductor layer and (b) in proportion to a reciprocal of a coefficient αa of light absorption by the medium of the semiconductor layer. This allows an increase in light absorption ratio of a photoelectric transducer including a photonic crystal structure.
摘要:
A copolymer comprising (i) an olefin unit selected from the group consisting of an ethylene unit and an α-olefin unit having 3 to 20 carbon atoms, and (ii) a unit of a compound represented by the formula, CH2═CH—(R1)m—SO3X; and a process for producing said copolymer comprising the step of contacting (i) the above-mentioned olefin, and (ii) the above-mentioned compound with a polymerization catalyst, wherein m is a number of 0 or 1, R1 is an aliphatic hydrocarbylene group having 1 to 18 carbon atoms, and X is a mono-valent cationic species.
摘要:
A polar monomer-olefin copolymer comprising a polar monomer unit in an amount of 50 to 75% by mol and an olefin unit in an amount of 25 to 50% by mol, and containing a chain structure consisting of two or more olefin units; a process for producing said copolymer comprising the step of radically copolymerizing 100 parts by mol of an olefin with 1 to 100 parts by mol of a polar monomer; and a process for producing said copolymer comprising the step of radically copolymerizing an olefin having a concentration in a polymerization reactor of 0.04 to 100 mol/liter with a polar monomer having a concentration therein of 0.01 to 25 mol/liter.
摘要:
The present invention relates to a vinyl polymer terminated in a silanol group, a hydrolyzable silyl group or an acrylic functional group, to a method of producing a vinyl polymer having a hydrolyzable silyl group at one or more termini thereof which comprises reacting a vinyl polymer having a silanol group at one or more termini thereof with a silicon compound having two or more silicon atom-bound hydrolyzable groups, and a method of producing a vinyl polymer having an acrylic functional group at one or more termini thereof which comprises reacting a vinyl polymer having a silanol group at one or more termini thereof with a silicon compound represented by the general formula (3): XSiR2—G—O—C(O)C(L)═CH2 (3) wherein X is a hydrolyzable group.
摘要:
An objective lens drive unit in an optical head includes a lens holder mounting thereon an objective lens, a sheet coil unit including a focusing coil and a tracking coil, and a pair of liquid crystal devices (LCDs) correcting a coma aberration and astigmatism of the optical beam from the objective lens, and an LCD drive circuit for driving the LCDs. The lens holder is cantilevered by a plurality of suspension wires, which deliver therethrough coil drive signals and LCD drive signals superposed on the coil drive signals.
摘要:
The present invention provides a vinyl polymer with an epoxy group terminally introduced therein and an epoxy resin composition comprising (A) an epoxy resin and (B) a vinyl polymer which has a main chain produced by living radical polymerization and has a reactive functional group at a main chain terminus. A flexible epoxy resin composition can be obtained using these compounds. The invention further provides an epoxy resin composition having an epoxy group at a main chain terminus thereof.
摘要:
The present invention relates to a vinyl polymer terminated in a silanol group, a hydrolyzable silyl group or an acrylic functional group, to a method of producing a vinyl polymer having a hydrolyzable silyl group at one or more termini thereof which comprises reacting a vinyl polymer having a silanol group at one or more termini thereof with a silicon compound having two or more silicon atom-bound hydrolyzable groups, and a method of producing a vinyl polymer having an acrylic functional group at one or more termini thereof which comprises reacting a vinyl polymer having a silanol group at one or more termini thereof with a silicon compound represented by the general formula (3): XSiR2-G-O—C(O)C(L)=CH2 (3) wherein X is a hydrolyzable group.
摘要:
A brake hose support structure for a vehicle having a first brake hose connected to a master cylinder, and second and third brake hoses connected respectively to left and right brake calipers, the first, second, and third hoses being joined to each other on a front fender. The joining between these brake hoses is accomplished by a hose joint having of a three-way joint fixed to a right side surface portion of the front fender. The second brake hose connected to the brake caliper on the left side is disposed bridgingly on a rear surface of the fender relative to a top portion of the front fender, and extends from the right side surface portion of the fender to the left side surface portion of the fender. The resulting configuration provides intake efficiency and cooling efficiency for the vehicle without causing increases in the number or the weight of component parts.