Abstract:
An image scanner includes a loading track for guiding movement of a medium having a forgery-proof element that creates a light interference pattern, a loading device provided for loading the medium along the loading track, and at least one image sensor provided for acquiring image data from the medium. The image sensor includes a light source for emitting a light toward the medium, a light receiving part for receiving the light reflected from the medium, a first polarizer arranged in front of the light source for polarizing the light emitted from the light source, a second polarizer disposed in front of the light receiving part with a phase difference of 90 degrees with respect to the first polarizer for polarizing the light reflected from the medium, and a lens disposed between the light receiving part and the second polarizer for leading the polarized light to the light receiving part.
Abstract:
A high speed imaging apparatus for CCD based scanners comprises a housing having separate compartments which complement modular assemblies installed therein. A decoder compartment houses components associated with locating and decoding an image. An optics compartment houses the mirrors and associated optics for reflecting the subject image onto the CCD detector. A lighting compartment includes high intensity lamps and the associated components for illuminating an object to be imaged. The lighting compartment includes a heat management system which removes the heat from the high intensity lamps and prevents heat from migrating to other compartments within the housing.
Abstract:
PURPOSE: An image sensor unit and an image reading apparatus are provided to perform illumination correction in case a temperature shift is generated in a light emitting wavelength of an LED(Light Emitting Diode). CONSTITUTION: A white reference data generating circuit(C) generates white reference data for indicating reference illumination of white. A correction data generating circuit(D) generates correction data based on white standard data. The correction data indicates reference illumination of white. A comparison circuit(E) calculates a correction coefficient from the correction data.
Abstract:
An image sensing apparatus having a large depth of focus (DOF) and being compact in size is provided. The image sensing apparatus includes a plurality of light sources that shines light beams on an illumination portion of a document; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in the secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the respective first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the respective aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the second aspheric mirrors; a plurality of light receivers each having a light-receiving area that receives the light beams from the second mirrors, to form images according to the light beams from the respective apertures; and a casing where the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction, and the aperture mirror is disposed on a second side thereof in the secondary scan direction.
Abstract:
An image reading apparatus of the present invention includes a first light source, a first light guide, a second light source, a second light guide, light receiving elements and a lens unit. The first light source emits first light. The first light guide directs the first light from the first light source toward an image-carrying object as first linear light extending in a primary scanning direction. The second light source emits second light of a wavelength different from that of the first light. The second light guide directs the second light from the second light source toward the image-carrying object as second linear light extending in the primary scanning direction. The light receiving elements are arranged in the primary scanning direction. The first and second linear lights are reflected by the image-carrying object, and the reflected lights are guided by the lens unit toward the light receiving elements.
Abstract:
In an illumination device, a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to the area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. An image reading device and an information processing apparatus can also be equipped with the above-mentioned illumination device.
Abstract:
Transparency media adapter and methods of using the same. Implementations of a system may comprise an imaging device having a light source and at least one sensor. A media adapter operatively associated with the imaging device includes a first reflective surface and a second reflective surface arranged to shift light emitted by the light source to a predetermined focus point of the at least one sensor during an imaging operation.