摘要:
A corrugated synthetic resin pipe comprises a pipe wall including sectionally rectangular wall portions and sectionally circular wall portions disposed alternately in a longitudinal direction of the pipe. Each of the sectionally circular wall portions has an annular projected portion disposed at a substantially center of the sectionally circular wall portion between adjacent sectionally rectangular wall portions in the longitudinal direction, to thereby prevent parallel layout or stack layout of pipes from being disturbed.
摘要:
Disclosed is a droplet discharge detection device including a head array unit in which plural nozzles are arranged in a line; a light emitter configured to emit a light beam in a direction in which the nozzles are arranged, wherein the light emitter is disposed at a first end portion of the head array unit and the light emitter has an aperture for limiting a diameter of a light beam; and a light receiver configured to receive a scattered light beam of the light beam generated by a droplet, wherein the light receiver is disposed at a second end portion of the head array unit, the second end portion being opposite to the light emitter of the head array unit.
摘要:
A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part comprises a ridge part formed of a crowning with varied tooth thickness, and a hub tooth part comprises a ridge part having tooth thickness formed in a specified linear shape and having an inner diameter varying from the end part thereof to a shaft shank side. A first step part swelling to the hub tooth part is formed in the bottom part of the shaft tooth part, and a second step part recessed in a direction opposite to the shaft tooth part is formed in the ridge part of the hub tooth part. The start point of the first step part and the start point of the second step part are set at positions offset by a specified distance from each other.
摘要:
The invention aims at provision of an optical scanner in which an optics required for equalizing an optical magnification in a scanning range is produced with high accuracy, so that intervals among a plurality of scanning lines on a to-be-scanned surface are even in the scanning range. The scanning optics includes a refraction surface and a reflection surface whose sub-scanning-direction curvature radii vary continuously. The reflection surface is disposed on the to-be-scanned surface side of the refraction surface. The curvature radius of the reflection surface varies symmetrically with respect to the optical axis, and the curvature radius of the refraction surface varies asymmetrically with respect to the optical axis.
摘要:
A multi-beam image forming apparatus includes: first and second semiconductor laser arrays each having n laser elements; a multi-beam generation unit that generates 2n laser beams by synthesizing laser beams generated by the first and second semiconductor laser arrays; a beam detection unit that generates synchronous detection signals to obtain synchronous scanning of the respective laser beams; and a control unit. The beam detection unit includes first and second beam detection units disposed substantially at a same position in a main scanning direction and adjacently disposed in a sub-scanning direction. The n laser beams of the first and second semiconductor laser arrays are detected by the first and second beam detection unit, respectively. The control unit controls image formation start positions of the 2n laser beams on the basis of the synchronous detection signals output from the first and the second beam detection units.
摘要:
In an optical scanning apparatus, a scanning lens is composed of three lens elements. The centrally located lens element of the scanning lens has a refractive power in the direction for correcting the surface tilt, that is, an inverted number of a focal length that is changed in accordance with the scanning view angle, whereby curvature of field is well corrected and RMS spot diameters on the scanning surface may be small. In addition, even if the view angle is increased, imaging characteristics may be kept at a high resolving power.
摘要:
A beam deflector device in which two light beams from two light sources are simultaneously applied through movable reflectors to a beam deflector scanning a drum. The beams are also applied, through a beam splitter to two photodetectors used to control the position of the respective reflector. The two beams are separated before they are applied to the photodetectors by means of polarization plates, color filters, diffraction gratings or prisms.
摘要:
In a circuit board disposed in parallel to a fixing plane, a guard spacer (abutting member) is disposed on a multi-layer printed circuit board on the side of the fixing plane to suppress deformation of the multi-layer printed circuit board to prevent short circuit if an impact is applied to the circuit board. The guard spacer may be a dummy electronic component or a plate member. An image display using the circuit board is also disclosed.
摘要:
In an optical scanning apparatus, a light beam emitted from a light source is deflected and scanned by a light deflecting member, and then scanned and imaged with substantial speed uniformity onto a medium to be scanned by a scanning optical element. The apparatus is configured so that, when the angle formed by the light beam that is deflected and scanned and the optical axis of the scanning optical element is θ, the amount of positional deviation due to deviation from speed uniformity of the light beam on the medium to be scanned is ε(θ), the spatial scan density on the medium to be scanned is P, and the maximum of an absolute value of the angle θ is θo, an expression of |dε(θ)/dθ|≦5.0×10/Pθo holds.