摘要:
An image forming device includes a plurality of image formation units each configured to form an image of one of a plurality of colors, and a patch image transfer unit configured to control transfer conditions during transferring a patch group that is a pattern for detecting a position shift and formed on an intermediate transfer belt onto a secondary transfer belt. The patch image transfer unit is configured to transfer patches of at least single color for which a band of transfer efficiency is narrowest, of the patch group, onto the secondary transfer belt under transfer conditions for the color, and during transition to the transfer conditions for the color from other transfer conditions or during transition from the transfer conditions for the color to the other transfer conditions, patches of a color other than the color, of the patch group is transferred onto the secondary transfer belt.
摘要:
An image forming device includes a plurality of image formation units each configured to form an image of one of a plurality of colors, and a patch image transfer unit configured to control transfer conditions during transferring a patch group that is a pattern for detecting a position shift and formed on an intermediate transfer belt onto a secondary transfer belt. The patch image transfer unit is configured to transfer patches of at least single color for which a band of transfer efficiency is narrowest, of the patch group, onto the secondary transfer belt under transfer conditions for the color, and during transition to the transfer conditions for the color from other transfer conditions or during transition from the transfer conditions for the color to the other transfer conditions, patches of a color other than the color, of the patch group is transferred onto the secondary transfer belt.
摘要:
An image forming apparatus includes a patch forming unit configured to form a patch group containing patch subgroups arranged in a sub-scanning direction. Each of the patch subgroups contains a reference color patch and a color patch of a different color. The reference color patches are shifted from each other in a main-scanning direction. The color patches are shifted from each other in the main-scanning direction. The patch subgroups include reference patch subgroups in each of which the reference color patch covers over the color patch and detection patch subgroups in each of which at least part of the color patch does not overlap with the reference color patch. Center positions of non-overlapping portions of the color patches that do not overlap with the reference color patches in the main-scanning direction are located at substantially a same position in the patch group.
摘要:
In a simultaneous multibeam scanning system, composite beams are formed by using two semiconductor laser arrays each of which can singly output a plurality of beams. An optical system is enabled to scan beams of the number, which corresponds to the sum total of output beams of each of laser light sources, in a scanning plane. A stabilization control means for maintaining the interval between adjacent scanning beams at a uniform value is introduced into this optical system.
摘要:
According to an aspect of the present invention, there is provided an optical scanning apparatus including a light source, an optical unit, a first controller and a second controller. The light source emits a predetermined number of laser beams, the laser beams to be arranged in a sub-scanning direction on a recording medium. The optical unit simultaneously scans the laser beams in parallel on the recording medium. The first controller changes a dot size of the laser beams in a main scanning direction. The second controller changes the predetermined number.
摘要:
A semiconductor laser device including an edge-emitting type laser chip having at least three emitting points in one light emitting edge, a sub-mount mounted with the laser chip, and a heat sink bonded to the sub-mount through a solder layer. When R designates a linear expansion coefficient ratio of the heat sink to the sub-mount and D designates a distance between light emitting points at opposite ends in the light emitting edge of the laser chip, materials of the sub-mount and the heat sink and the distance D are set to satisfy the following relation: D≦5.48×R−2.13 A difference between stress acting on one laser element and another in the laser chip due to shrinkage of the heat sink when melted solder is cooled down is reduced so that a difference in light output characteristics between one light emitting point and another can be reduced.
摘要:
The subject of the disclosed art is to prevent a short circuit between plural electrodes caused by soldering in the assembling process for a semiconductor laser element. The constitution for improving the subject is as follows. A semiconductor laser device comprises a semiconductor laser chip having a first electrode and a laser sustaining material, in which the laser sustaining material has electrodes and solder layers connected electrically therewith on the surface where the semiconductor laser chip is mounted, the first electrode of the semiconductor laser chip is connected with the solder layer of the laser sustaining material and at least the solder layer of the laser sustaining material extends from at least one end face in the longitudinal direction of an optical resonator of the semiconductor laser chip to the outside of the optical resonator.
摘要:
According to an aspect of the present invention, there is provided an optical scanning apparatus including a light source, an optical unit, a first controller and a second controller. The light source emits a predetermined number of laser beams, the laser beams to be arranged in a sub-scanning direction on a recording medium. The optical unit simultaneously scans the laser beams in parallel on the recording medium. The first controller changes a dot size of the laser beams in a main scanning direction. The second controller changes the predetermined number.
摘要:
A two-dimensional beam writing position detecting device for providing an optical system for scanning on a photoconductor by laser beams emitted from a semiconductor laser to form an electrostatic latent image and arranging a plurality of the laser beams in two dimensions and slantingly scanning each the laser beam for forming the electrostatic latent image on the photoconductor at a predetermined angle and detecting the laser beams for determining the first writing position on the photoconductor of the laser beams is characterized in that a longitudinal direction of a beam light receiving surface of the detecting device 1 inclines at the substantially same angle as the slant scanning angle with respect to the perpendicular of a scanning direction of the plural beams.
摘要:
An annular groove is formed on the upper surface, or a surface C, of a rotor member. A surface D and a surface E of a rotor member, which are located closer to the center than the annular groove when radially viewed, are machined for correcting a dynamic unbalance of the rotor member. Therefore, a nonuniform deformation of the rotor member, which results from a centrifugal load and heat, which are due to the rotation of the rotor member, reaches the inside-diameter defining wall of the annular groove, but does not reach the outside-diameter defining wall of the annular groove since it is blocked by the annular groove.