Patent application number | Description | Published |
20080198466 | Method and apparatus for controlling multiple beam spacing - An anamorphic optical element and an adjustment mechanism for selectively rotating the optical element either around an axis substantially in a vertical direction, an axis substantially in an optical axis direction, an axis substantially in a plane formed by the vertical direction and the optical axis direction, or combination of axes thereof is used to vary a vertical separation between two or more spots. | 08-21-2008 |
20080278566 | Apparatus and Method of Scanning Light Using an Array of Light Sources - Apparatus comprising a two-dimensional array of light sources ( | 11-13-2008 |
20090128616 | APPARATUS AND METHOD OF REDUCING BANDING ARTIFACT VISIBILITY IN A SCANNING APPARATUS - A method of, and apparatus for, reducing the visibility of banding artifacts on a printed medium comprising producing synthetic artifacts on the printed medium, overlapping scan lines at swath boundaries and controlling exposure along a scan line to reduce the visibility of the banding artifacts. | 05-21-2009 |
20090296229 | Anamorphic Prisms - Various embodiments and methods relating to groups of anamorphic prisms that are configured to reduce smile in a multi-beam optical system are disclosed. | 12-03-2009 |
20110085014 | Laser Array - Electrophotographic print system, comprising a photosensitive medium, and a laser array being provided with a plurality of laser diodes arranged to emit light onto the photosensitive medium for varying an electrical potential on a surface of the photosensitive medium, and a plurality of heat dissipation diodes, each heat dissipation diode being arranged in proximity to a corresponding laser diode, wherein each laser diode and the corresponding heat dissipation diode are coupled to a common drive circuit and are arranged in opposite current flow directions with respect to each other, so that in use the current flows either through the laser diode or through the heat dissipation diode depending on the current flow direction in the drive circuit. | 04-14-2011 |
20110103813 | Correction Method, Apparatus, Data Carrier or System for Correcting for Unintended Spatial Variation in Lightness Across a Physical Image Produced by a Xerographic Process - A correction method for correcting unintended spatial variation in lightness across a physical image produced by a xerographic process, the method comprising producing a test image using the xerographic process, measuring a difference between actual lightness and intended lightness across at least part of the test image, and varying the light source level used subsequently in the xerographic process to correct for the measured unintended difference. | 05-05-2011 |
20110243393 | Repeating Band Print Artifact Evaluation - A method and apparatus are provided for evaluating the severity in a printed image of a repeating band print artifact. After electronically capturing the printed image, each of a plurality of patches taken from captured image is analysed to produce an artifact severity measure for the patch; an overall artifact severity value is then determined for the printed image from the patch severity measures. The analysis of each patch involves producing a spatial intensity profile across the patch substantially at right angles to an expected direction of extent of any repeating band print artifact present; a Fourier-related transform is then applied to the spatial intensity profile and the patch artifact severity measure generated by summing the resultant spatial frequency coefficients in a limited range about a frequency of interest. | 10-06-2011 |
20140085393 | OPTICAL SCANNING APPARATUS, SYSTEM AND METHOD - An optical scanning apparatus, a system and a method of optical scanning independently determine illumination spot size and spacing. The apparatus includes an array of optical emitters to provide a plurality of optical beams and a plurality of microlenses to receive the optical beams. The microlenses form an intermediate image of the array at substantially unity array magnification. The apparatus further includes an adjustable collimator to receive the plurality of optical beams from the intermediate image, a beam scanner to scan the optical beams in an in-scan direction, and a scan lens to focus the scanned optical beams. An arrangement of illumination spots forms an image of the array. | 03-27-2014 |