Abstract: A laser beam irradiating unit of a laser processing apparatus includes a laser oscillator, a mirror configured to reflect a laser beam emitted from the laser oscillator and propagate the laser beam to a processing point, a power measuring unit configured to measure power of leakage light of the laser beam transmitted without being reflected by the mirror, and a condensing lens configured to condense the laser beam propagated by the mirror and irradiate a workpiece with the condensed laser beam. The control unit measures the power of the leakage light of the laser beam by the power measuring unit while irradiating the workpiece with the laser beam.

Abstract: An image forming apparatus includes: image-forming units of multiple colors that form images on an image carrier in such a manner that the images are overlaid on one another, and a determination unit that determines necessity of position alignment correction of an image of each color accompanying image formation in accordance with a degree of change of image formation environment from when correction was executed in the past and a combination of colors used for the image formation.

Abstract: An image forming apparatus includes: image-forming units of multiple colors that form images on an image carrier in such a manner that the images are overlaid on one another, and a determination unit that determines necessity of position alignment correction of an image of each color accompanying image formation in accordance with a degree of change of image formation environment from when correction was executed in the past and a combination of colors used for the image formation.

Abstract: A device, apparatus, and method of controlling operation of scanning performed by an optical scanning device are disclosed such that the color images are not shifted in the sub-scanning direction even when thinning processing is performed.

Abstract: A color image forming device, including: an optical scanning part; an image carrier where a latent image is formed by the optical scanning part; a developing part configured to develop the latent image of the image carrier; an endless belt configured to move so as to come in contact with the image carrier where the developed image is formed; an environment detection part provided at least at one of the optical scanning part, the image carrier, the developing part, and the endless belt, the environment detection part being configured to obtain environmental data; and a control part configured to implement positioning control based on the environmental data from the environment detection part.

Abstract: A device, apparatus, and method of controlling operation of scanning performed by an optical scanning device are disclosed such that the color images are not shifted in the sub-scanning direction even when thinning processing is performed.

Abstract: A light-emission control unit controls an emission of a light beam from a light-beam generating unit based on an input image signal. A light-beam scanning unit deflects the light beam in a main scanning direction and irradiates the deflected light beam on an image carrier. An anomalous-light emission detecting unit detects an anomalous light emission of the light-beam generating unit when there is no image signal input to the light-emission control unit. A control unit performs an error processing based on the detected anomalous light emission.

Abstract: A magnification correction controller corrects magnification in a main scanning direction by changing a timing of an image signal based on a time difference between a first detection time in a predetermined position along a main scanning line of the image carrier to which the laser beam is irradiated and a second detection time in a position different from the predetermined position along the main scanning line. The magnification correction controller corrects the magnification in the main scanning direction by changing a timing of the image signal corresponding to a color different from a predetermined color, based on the time difference measured for the predetermined color.

Abstract: Magnification correction of an image is performed by changing the cycle time of an optional pixel in the unit of pixel, until a phase adjustment amount (phase shift value) calculated by fixing the frequency exceeds a preset specified value, and after the phase adjustment amount exceeds the preset specified value, magnification correction of the image is performed by changing the frequency of an image signal in the unit of a line or in the unit of a plurality of lines. Accordingly, the number of execution of the magnification correction of an image by the latter method, in which it is necessary to suspend the image forming operation at the time of execution thereof, can be reduced.

Abstract: A measuring unit measures a time difference between detections of the optical beams by an optical beam detector arranged on either side of an image carrier with respect to a horizontal scanning direction. A magnification correcting unit determines whether a beam spot position adjustment amount corresponding to each of a plurality of developing colors preset by the sub position correcting unit exceeds a threshold preset for each of the plurality of developing colors, and depending on the result of the determination, performs magnification correction of the image by changing a beam spot position interval on a scanning line in units of a line or lines, or by changing a beam spot position interval on a scanning line in units of pixel.

Abstract: A test pattern for position adjustment is written on an intermediate transfer body in a sheet interval when a plurality of normal images are written continuously, using a start signal as a trigger. The test pattern is read and fed back by a sensor to adjust image formation control conditions. A normal image on the intermediate transfer body is transferred onto a paper medium supplied in a secondary transfer unit. However, the test pattern passes through the secondary transfer unit without the paper medium being supplied, thereby staining a transfer roller. Therefore, the secondary transfer unit and a transfer belt are separated from each other by a contacting/separating mechanism, while the test pattern written in the sheet interval passes through the secondary transfer unit.

Abstract: A color image forming device, including: an optical scanning part; an image carrier where a latent image is formed by the optical scanning part; a developing part configured to develop the latent image of the image carrier; an endless belt configured to move so as to come in contact with the image carrier where the developed image is formed; an environment detection part provided at least at one of the optical scanning part, the image carrier, the developing part, and the endless belt, the environment detection part being configured to obtain environmental data; and a control part configured to implement positioning control based on the environmental data from the environment detection part.

Abstract: A magnification correction controller corrects magnification in a main scanning direction by changing a timing of an image signal based on a time difference between a first detection time in a predetermined position along a main scanning line of the image carrier to which the laser beam is irradiated and a second detection time in a position different from the predetermined position along the main scanning line. The magnification correction controller corrects the magnification in the main scanning direction by changing a timing of the image signal corresponding to a color different from a predetermined color, based on the time difference measured for the predetermined color.

Abstract: A light-emission control unit controls an emission of a light beam from a light-beam generating unit based on an input image signal. A light-beam scanning unit deflects the light beam in a main scanning direction and irradiates the deflected light beam on an image carrier. An anomalous-light emission detecting unit detects an anomalous light emission of the light-beam generating unit when there is no image signal input to the light-emission control unit. A control unit performs an error processing based on the detected anomalous light emission.

Abstract: A measuring unit measures a time difference between detections of the optical beams by an optical beam detector arranged on either side of an image carrier with respect to a horizontal scanning direction. A magnification correcting unit determines whether a beam spot position adjustment amount corresponding to each of a plurality of developing colors preset by the sub position correcting unit exceeds a threshold preset for each of the plurality of developing colors, and depending on the result of the determination, performs magnification correction of the image by changing a beam spot position interval on a scanning line in units of a line or lines, or by changing a beam spot position interval on a scanning line in units of pixel.

Abstract: Magnification correction of an image is performed by changing the cycle time of an optional pixel in the unit of pixel, until a phase adjustment amount (phase shift value) calculated by fixing the frequency exceeds a preset specified value, and after the phase adjustment amount exceeds the preset specified value, magnification correction of the image is performed by changing the frequency of an image signal in the unit of a line or in the unit of a plurality of lines. Accordingly, the number of execution of the magnification correction of an image by the latter method, in which it is necessary to suspend the image forming operation at the time of execution thereof, can be reduced.