Abstract:
An apparatus for recording an image onto a light recording medium (16) includes a light source (120) which emits light at a position which is movable over a light emitting area (21) of the light source controlled by a controller (13). A light position sensor (142) has a target area optically coupled to light emitted from a plurality of positions within the light emitting area of the light source used for recording for detecting the position of the light intersecting the target area of the sensor from the light emitting area of the light source and generating a signal dependent upon the light intersecting the target area. A controller (13), responsive to the signal, produces a correction parameter and controls the position of the light on the light emitting area of the light source with the correction parameter during recording. The present invention also reduces the effects of recording errors which occur near section boundaries as the sections are recorded onto a recording medium.
Abstract:
An engraving system (10) and method is disclosed having multiple engraving heads (22, 24) wherein the operation of each head is controllable so that a vertical and/or horizontal screen may be independently controlled, enabling each engraving head to engrave in accordance with different screen rulings selected by a user. The engraving system includes a signal generator for controlling the vertical screen by utilizing a plurality of vertical scalers which use a cylinder factor signal corresponding to the rotational position of a cylinder (16) and as screen variables, such as a screen angle and screen ruling, to generate independent vertically scaled signals which are used to independently energize the engraving heads to engrave patterns defining different vertical resolutions or vertical screens. This system and method also discloses a drive system (28) for independently driving the engraving heads using the cylinder factor signal and the screen variables to enable the engraving heads to engrave patterns having differing horizontal resolution or horizontal screens.
Abstract:
PROBLEM TO BE SOLVED: To provide an optical scanner which suppresses tilting of a scan line even if the ratio of the linear speed of a latent image carrier and the speed of the scanning line is varied, and also to provide an image forming apparatus. SOLUTION: The tilting of the scanning line on a surface of a photoreceptor drum being a latent image carrier is adjusted according to the ratio K of the scanning speed Vimg of a light beam scanning the surface of the photoreceptor drum and the linear speed (process linear speed) V of the photoreceptor drum. The tilting of the scanning line is thereby suppressed when the ratio K of the process linear speed V and scanning speed Vimg is different. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
The relationship between first and second side images is evaluated to determine how the position of the paper and/or the size and arrangement of an image can be manipulated to compensate for paper shrinkage caused by fusing. Show through is reduced by performing setup to adjust a pixel clock frequency and/or a photoreceptor speed, determining a residual magnification error, determining margin shifts to compensate for the residual magnification error, and applying the margin shifts. Paper shrink effects on registration can be compensated for using determinations made during a typical printer setup. Show through errors can be reduced without using a paper conditioner to pre-shrink or re-wet the paper. In simplex and duplex printing, the show through errors worsen as the image moves away from the registration edge. Using information obtained during setup, a margin shift is determined that results in a significant reduction in the maximum show through for each image.
Abstract:
An optical encoder includes a light emitting unit that emits parallel light onto a plurality of marks that are arranged on an object such as a rotor or a belt, at a predetermined interval in a moving direction of the object, and a light receiving unit that receives light modulated by the marks. The parallel light is generated by a collimating lens.
Abstract:
An image forming apparatus includes a drum, an optical scanning mechanism, a development mechanism, an intermediate transfer member, movement detecting mechanisms, and a controller. The optical scanning mechanism deflects a laser light beam to form a latent image on a photosensitive surface of the drum. The development mechanism contains a plurality of different color toners and develops the latent image into a color toner image. The intermediate transfer member is rotated in synchronism with a rotation of the drum and receives the color toner image multiple times to form thereon a composite color toner image including multiple images of the different color toners overlaying one to another. The movement detecting mechanisms detect respective movements of the drum and the intermediate transfer belt. The controller controls respective rotations of the drum and the intermediate transfer belt with results of respective detection performed by the plurality of movement detecting mechanisms.