Abstract: An apparatus (100) and method (200) that determines beam delays in a printing device is disclosed. The apparatus can include a photosensitive surface (110) and a raster output scanner (120) optically coupled to the photosensitive surface, an integrated scan detector (130) configured to detect the beams from the raster output scanner and configured to produce a signal based on the beams detected from the raster output scanner, and a beam calibration controller (140) coupled to the integrated scan detector. The beam calibration controller can be configured to determine at least one beam delay between the first optical emitter and the at least one second optical emitter based on signals from the integrated scan detector and can also be configured to delay operation between the first optical emitter and the at least one second optical emitter based on the at least one beam delay.

Abstract: An apparatus (100) and method (200) that determines beam delays in a printing device is disclosed. The apparatus can include a photosensitive surface (110) and a raster output scanner (120) optically coupled to the photosensitive surface. The raster output scanner can include a first optical emitter (121) configured to scan a first beam across the photosensitive surface and at least one second optical emitter (122) configured to scan a second beam across the photosensitive surface to form an image on the photosensitive surface. The apparatus can include an integrated scan detector (130) configured to detect the beams from the raster output scanner and configured to produce a signal based on the beams detected from the raster output scanner. The apparatus can include a beam calibration controller (140) coupled to the integrated scan detector.

Abstract: Aspects of the disclosure provide a method for improving performance of a raster output scanner (ROS) system with a reduced cost. The method can include identifying a current mirror facet of a motor polygon assembly (MPA) including multiple mirror facets that each mirror facet has a reflectivity characteristic, determining a driving signal based on the reflectivity characteristic of the current mirror facet and a performance characteristic of a light source, and driving the light source based on the driving signal to emit light that is reflected by the MPA onto a photoreceptor.

Abstract: Aspects of the disclosure provide a method for improving performance of a raster output scanner (ROS) system with a reduced cost. The method can include identifying a current mirror facet of a motor polygon assembly (MPA) including multiple mirror facets that each mirror facet has a reflectivity characteristic, determining a driving signal based on the reflectivity characteristic of the current mirror facet and a performance characteristic of a light source, and driving the light source based on the driving signal to emit light that is reflected by the MPA onto a photoreceptor.

Abstract: A line-at-a-time printer is realized by directing a collimated light beam through an interaction area of an electro-optic light modulator while successive sheets of data samples are sequentially applied to electrodes positioned across the width of the modulator. A modulated line latent image is formed on the surface of a photoreceptor, the photoreceptor being indexed to create successive exposed, modulated line images on its surface. Electronic registration control of successive images, for example in a color printing process, is achieved by a control system which triggers the light beam source between the time interval during which data signals are loaded into the modulator. In one embodiment the pulse sourcing is accomplished through a feedback loop which includes a sensor for monitoring movement of the photoreceptor and application of the light source pulses and the data samples.