Abstract: Processes are presented for creating electronic banding compensation profiles for raster output scanner (ROS) devices by printing and scanning a test pattern having a series of strips extending along a process direction and spaced from one another along a cross process (fast scan) direction, analyzing the scanned data to determine facet-specific banding errors corresponding to individual strips, and selectively adjusting banding correction profiles to counteract the banding errors.

Abstract: Raster Output Scanners and printing systems are presented along with methods for mitigating banding in printing systems, in which electronic banding compensation is employed using cross-process direction light source intensity banding correction profiles tailored to corresponding reflective facets of a rotating polygon.

Abstract: Processes are presented for creating electronic banding compensation profiles for raster output scanner (ROS) devices by printing and scanning a test pattern having a series of strips extending along a process direction and spaced from one another along a cross process (fast scan) direction, analyzing the scanned data to determine facet-specific banding errors corresponding to individual strips, and selectively adjusting banding correction profiles to counteract the banding errors.

Abstract: Raster Output Scanners and printing systems are presented along with methods for mitigating banding in printing systems, in which electronic banding compensation is employed using cross-process direction light source intensity banding correction profiles tailored to corresponding reflective facets of a rotating polygon.

Abstract: Systems and methods for reducing the degradation of image quality due to banding in an image processing system by detection of both integrated intensity and peak intensity of a laser beam reflected from the polygon mirror facet(s) of a motor polygon assembly. A banding detector is adapted to enable measurement of peak intensity and integrated intensity of the laser beam(s) reflected from the polygon mirror facet(s). Polygon facet induced banding can be determined from the measurements and can be used for sorting/manufacturing raster output scanners and/or compensating for the induced banding.

Abstract: A document illuminator comprising a light-transmissive element having nonlinear walls. The walls are shaped in the form of a compound parabolic concentrator with an optically inverted configuration. A diffusive optical source receives light from a side emitting LED embedded therein and redirects it to an aperture along with other light rays that go through total internal reflection from the nonlinear walls. The reflected light rays that are collected at the aperture are in turn transmitted at high power and uniform luminescence to illuminate a document for scanning.

Abstract: Systems and methods for reducing the degradation of image quality due to banding in an image processing system by detection of both integrated intensity and peak intensity of a laser beam reflected from the polygon mirror facet(s) of a motor polygon assembly. A banding detector is adapted to enable measurement of peak intensity and integrated intensity of the laser beam(s) reflected from the polygon mirror facet(s). Polygon facet induced banding can be determined from the measurements and can be used for sorting/manufacturing raster output scanners and/or compensating for the induced banding.

Abstract: A system for detecting reflectance from an image bearing surface in a printer or electronic copier includes an illuminator array, positioned adjacent to the image bearing surface, comprising a plurality of discrete illuminator elements that are spaced in a linear arrangement; a lens array comprising a plurality of collimator lenses positioned between the illuminator array and the image bearing surface, the collimator lenses being positioned with respect to the illuminator array to receive light beams emitted by the illuminator elements and to collimate the light beams for transmission to the image bearing surface at an incidence angle; a linear sensor array comprising a plurality of sensors and positioned adjacent to the image bearing surface such that, of the light beams reflecting off the image bearing surface, specular portions and diffuse portions reflecting at a reflectance angle are received by the sensors.

Abstract: A document illuminator comprising a light-transmissive element having an embedded side emitting LED fitted in a cavity formed therein. The light-transmissive element is formed with one or more optical notches and is totally encased in a white surround to yield total internal reflection of the light rays emanating from the LED. The reflected light rays are collected at an aperture which in turn transmits high power and highly uniform illumination profile to illuminate a document.

Abstract: A document illuminator comprising a light-transmissive element having nonlinear walls. The walls are shaped in the form of a compound parabolic concentrator with an optically inverted configuration. A diffusive optical source receives light from a side emitting LED embedded therein and redirects it to an aperture along with other light rays that go through total internal reflection from the nonlinear walls. The reflected light rays that are collected at the aperture are in turn transmitted at high power and uniform luminescence to illuminate a document for scanning.

Abstract: A document illuminator comprising a light-transmissive element having nonlinear walls. The walls are shaped in the form of a compound parabolic concentrator with an optically inverted configuration. A diffusive optical source receives light from a side emitting LED embedded therein and redirects it to an aperture along with other light rays that go through total internal reflection from the nonlinear walls. The reflected light rays that are collected at the aperture are in turn transmitted at high power and uniform luminescence to illuminate a document for scanning.

Abstract: A system for detecting reflectance from an image bearing surface in a printer or electronic copier includes an illuminator array, positioned adjacent to the image bearing surface, comprising a plurality of discrete illuminator elements that are spaced in a linear arrangement; a light diffuser positioned between the illuminator array and the image bearing surface, the light diffuser being positioned with respect to the illuminator array to receive the light beams emitted by the illuminator elements and to diffuse the light beams for transmission to the image bearing surface at an incidence angle; and a linear sensor array positioned adjacent to the image bearing surface such that specular and diffuse portions of the light beams reflecting off the image bearing surface at a reflectance angle bearing are received by the sensors.

Abstract: A system for detecting reflectance from an image bearing surface in a printer or electronic copier includes an illuminator array, positioned adjacent to the image bearing surface, comprising a plurality of discrete illuminator elements that are spaced in a linear arrangement; a light diffuser positioned between the illuminator array and the image bearing surface, the light diffuser being positioned with respect to the illuminator array to receive the light beams emitted by the illuminator elements and to diffuse the light beams for transmission to the image bearing surface at an incidence angle; and a linear sensor array positioned adjacent to the image bearing surface such that specular and diffuse portions of the light beams reflecting off the image bearing surface at a reflectance angle bearing are received by the sensors.

Abstract: A scanner includes an illuminator and a platen adapted to support a document to be scanned. A light source directs light into the platen and the light is reflected internally within the platen. A movable light sensor is positioned adjacent the platen. Liquid crystal sections between the document and the light sensor cause a zone of light to pass from the platen to the document, thereby illuminating only a portion of the document.

Abstract: Image sensor module architecture provides flexible mounting of illuminators in an imaging apparatus with flexible fasteners. The architecture involves one or more LED-based illuminators that may be mounted adjustably to provide high intensity and uniform profile luminescence. The supporting imaging and electronic circuit components are quickly assembled and disassembled from the image sensor module by using a flexible multi-function clip having multiple segments for holding multiple objects together.

Abstract: An apparatus for illuminating a document comprises an optical element defining an entry surface and an exit surface opposite the entry surface. A first substantially parabolic surface and a second substantially parabolic surface are defined between the entry surface and the exit surface.

Abstract: An apparatus for scanning a document comprises a platen for supporting at least a portion of the document; a light source; and an optical element for directing light from the light source to the platen. The optical element defines a plurality of small planar surfaces, the small planar surfaces being arranged in a linear array. Light emanating from a source is reflected from one of the small planar surfaces and emerges substantially perpendicular to an exit surface.

Abstract: A document illuminator includes a light-transmissive element having an embedded source of illumination fitted in a cavity formed therein. The light-transmissive element preferably has one or more optical notches and preferably is encased in an opaque surround to promote total internal reflection of the light rays emanating from the LED. The one or more optical notches may include a dual-V notch or an elliptical notch. The reflected light rays are collected at an aperture which in turn transmit light at high power and highly uniform illumination profile to illuminate a document.

Abstract: A document illuminator comprising a light-transmissive element having nonlinear walls. The walls are shaped in the form of a compound parabolic concentrator with an optically inverted configuration. A diffusive optical source receives light from a side emitting LED embedded therein and redirects it to an aperture along with other light rays that go through total internal reflection from the nonlinear walls. The reflected light rays that are collected at the aperture are in turn transmitted at high power and uniform luminescence to illuminate a document for scanning.

Abstract: Image sensor module architecture provides flexible mounting of illuminators in an imaging apparatus with flexible fasteners. The architecture involves one or more LED-based illuminators that may be mounted adjustably to provide high intensity and uniform profile luminescence. The supporting imaging and electronic circuit components are quickly assembled and disassembled from the image sensor module by using a flexible multi-function clip having multiple segments for holding multiple objects together.