Abstract:
Deformation of a second optical carriage (B) due to heat is large on a (C) side where an inverter (31) is attached and small on a (D) side. A mirror supporting portion inside the second optical carriage (B) supports the mirror at one point on the (C) side and at two points on the (D) side. An angle of the reflecting mirror (8) depends on two protrusions on the (D) side where thermal deformation is small, and the mirror is supported at one point on the (C) side where thermal deformation is large. Thus, even if an angle of the mirror supporting portion (C) changes, the angle of the reflecting mirror (8) is not affected. Therefore, a change in the angle of the reflecting mirror (8) can be controlled to be small when temperature of the second optical carriage (B) rises during a reading operation, and decrease in reading accuracy due to thermal deformation of the second optical carriage (B) can be suppressed.
Abstract:
A system and method are disclosed which provide a look-down digital imaging device capable of scanning a calibration area included within such look-down digital imaging device to capture image data for the calibration area and calibrate itself based on analysis of such captured image data. More specifically, a preferred embodiment includes a calibration area that is integrated internally within the look-down digital imaging device. When performing calibration in such a preferred embodiment, the scan head of the look-down digital imaging device is operable to align itself with the calibration area to allow for a scan of the calibration area (i.e., the capture of digital image data of the calibration area). In one embodiment, a look-down digital imaging device does not achieve a focused scan of the calibration area, but is capable of utilizing captured unfocused digital imaging data for calibration. In a preferred embodiment, a look-down digital imaging device achieves a focused scan of the calibration area, thereby enabling a further accurate calibration. More specifically, a preferred embodiment folds the optical path of the reflected light from the calibration area in order to have the optical path of such calibration area accurately mimic the optical path of an original to be scanned, thereby allowing for focused calibration to be achieved.
Abstract:
A stray-light attenuating device for removing stray light from a scanner. The attenuating device includes a light source, a lens, a reflecting mirror, a light sensor, a front cover plate and a back cover plate. The light source provides a beam of light for illuminating a document on the scanner. Light from the light source impinges upon the document and reflects to the reflecting mirror. The reflecting mirror deflects the reflected light to the lens. The lens focuses the reflected light onto the optical sensor to form an image. The optical sensor at least includes a plurality of connecting leads, a sensing surface and a backside. The back cover plate having an opening thereon is used for covering the backside of the optical sensor. The front cover plate having a window thereon is used for covering the sensing surface of the optical sensor.
Abstract:
A photosensor having an electrically insulating, translucent substrate; an opaque conductive layer formed on the substrate; an insulating layer formed on the conductive layer, and a semiconductive layer formed on the insulating layer for receiving light and providing a current corresponding thereto. A pair of electrodes are formed in contact with the semiconductor layer and define a light receiving window therebetween. The electrodes are formed so as to not substantially overlap the conductive layer. The conductive layer is supplied with a bias voltage corresponding to a polarity and an amount of carriers defining the current of the semiconductor layer and a voltage Va of a small absolute value during a non-reading period of the photosensor.
Abstract:
In one example, a document scanner has a fixed-position scan bar and a built-in translatable calibration target. The scan bar has a linear array of imaging elements aimed in an imaging direction. The calibration target is spaced apart from and parallel to the linear array, and has a planar surface orthogonal to the imaging direction spanning the length of the linear array. The target is translatable during a calibration in a direction in a plane of the surface.
Abstract:
An image forming apparatus for forming images to a medium, includes an apparatus housing; a temperature detection unit for detecting a temperature of a surrounding of the apparatus housing; a dehumidifying unit for dehumidifying an interior surrounded by the apparatus housing; and a dehumidifying decision unit for operating the dehumidifying unit based on a change of the detected temperature at the temperature detection unit, to certainly remove dew condensation
Abstract:
A dual-slope light guide includes a first surface, a second surface and a curved surface. The first surface has first reflecting structures. The second surface, connected to the first surface, has second reflecting structures. An included angle between the first surface and the second surface is unequal to 180 degrees. The curved surface connects the first surface to the second surface. The first surface, the second surface and the curved surface extend from a first end of the light guide to a second end of the light guide. A light beam incident to the first end of the light guide is reflected and converted by the first reflecting structure and the second reflecting structure into linear light emitted from the curved surface. A light source module and an optical assembly for a scanner are also disclosed.
Abstract:
An overhead scanner 1 includes an imaging unit 22 that images a medium S placed on a mount surface 2 to be read from above and a light source 21 that is arranged to be able to irradiate the medium S with light during imaging by the imaging unit 22. A control device 40 of the overhead scanner 1 performs anti-glare control when detecting that the medium S is glossy. This prevents glare from occurring to the user during operation of the overhead scanner 1.
Abstract:
An image reading apparatus, including: an image reading unit configured to read an image of a document placed on a document placing portion; a document pressure unit configured to press the document placed on the document placing portion against the document placing portion; a first holding unit configured to hold the document pressure unit so that the document pressure unit is openable and closable with respect to the document placing portion with a shaft pivotally supporting the document pressure unit; and a second holding unit configured to hold the document pressure unit so that the document pressure unit is openable and closable with respect to the document placing portion without a shaft pivotally supporting the document pressure unit.
Abstract:
An illumination apparatus includes: a rod-like light guide member that directs light emitted from a first light source and a second light source from an emission surface to an illuminated body while propagating the light by reflection surfaces; and a light blocking member including a second surrounding portion slidably covering another end of the light guide member, wherein the second surrounding portion includes: a light blocking portion protruding toward one end of the light guide member and covering the emission surface of the light guide member; and a cut-out portion adjacent to the light blocking portion and exposing the reflection surface of the light guide member.