Abstract:
A housing includes a first portion and second portion. Each of the first and second portions supports a mirror and are connected and prevented from independent movement through a cover glass plate. The connection between the portions of the housing reduces the amount of angular change of mirrors within the housing resulting from a change in temperature, and thereby reduces the amount of displacement of a reading point of an image receiving element during the temperature change. The reading point is projected along an optical path including multiple reflections from the mirrors. A first connection device tightly fits the cover glass plate between the first and second portions of the housing, and a second connection device adheres the cover glass plate to the first and second portions of the housing.
Abstract:
A scanning apparatus includes a sheet holder for holding a sheet to be scanned in the shape of a segment of a cylinder, a light source for irradiating the sheet with light, a spinner including a converging lens for converging light from the light source on the surface of the sheet, and a light detector for photoelectrically detecting light from the sheet, a spindle motor including a plurality of rolling balls in a bearing for rotating the spinner coaxially with a center axis of the cylinder, and a sub-scanning device for moving the sheet holder relative to the spinner in a direction parallel to the center axis, and the rolling balls are provided so that the vibrational frequency F of the bearing satisfies the formula Fb/6.ltoreq..vertline.F-n1.times.Fb.vertline..ltoreq.Fb/2 wherein Fb is the rotational frequency of the spindle motor and n1 is a positive integer. According to the thus constituted scanning apparatus, it is possible to read an image which contain no visibly recognizable wave-like unevenness even when the image is read at high density at a reduced scanning pitch.
Abstract:
In an apparatus for scanning an original image by directing light from an original irradiated with a light source to a photoelectric conversion device or a photosensitive member, the natural frequencies of a plurality of mirrors for reflecting the light from the original are set to different values to prevent the plurality of mirrors from vibrating at the same frequency.
Abstract:
An imaging module mounting apparatus is provided to improve dynamic performance without creating an overconstraint condition causing misalignment of the imaging module. Three solid mounts are used to establish and maintain critical location datums of the imaging module. A single or plurality of variably flexible mounts are used, depending on the size of the module, to maintain alignment while minimizing any overconstraint condition caused by the imaging module being distorted out of plane due to thermal distortion and/or static distortion of the mounting frame due to movement of the machine. The variably flexible mount is filled with a high-viscosity silicon polymer. Due to the high-viscosity of the medium, the mount does not respond to fast or high-frequency vibration and appears to be a rigid mount with regard to such movement. The mount will react to very low frequency or static distortion such as that caused by movement of the machine and/or thermal distortion and maintain the imaging module in the proper position to prevent perceptible image defects.
Abstract:
A laser imaging apparatus, such as a laser scanner or laser printer, includes a gas or diode laser which produces a laser beam and an optical system for directing the laser beam onto a object to be scanned or printed. The laser beam is encompassed in a sealed housing from the laser's output to a point at which the beam is no longer subjected to turbulent environment in order to eliminate laser beam pointing instabilities resulting from a turbulent environment caused by thermal sources, cooling fans, etc.
Abstract:
.[.The invention provides a.]. .Iadd.A .Iaddend.scanner system .[.which.]. in one embodiment includes only a single moving part in the document path, namley a drive roll, which serves not only to move the document through the system, but also to provide a backing against which the document is pushed while a proximate region thereof is being scanned. .[.The invention in an.]. .Iadd.An .Iaddend.embodiment also provides an opto-mechanical assembly that is shock-mounted to the frame of the system at only three-spaced apart locations, so that the assembly tends to be isolated from vibration and torsional forces.
Abstract:
An optical scanning device, which includes a transparent support plate having a supporting surface on which an original is positioned, a scanner carriage being mounted for transverse movement below the support plate on two guide elements extending parallel to each other characterized by the guide elements being frame parts having surfaces forming the guide tracks for the carriage and also having surfaces facing the guide tracks for engaging the supporting surface of the support plate so that the distance between the supporting surface and the scanner is determined by the position of the seating surface relative to the guide track.
Abstract:
The invention provides a scanner system which in one embodiment includes only a single moving part in the document path, namley a drive roll, which serves not only to move the document through the system, but also to provide a backing against which the document is pushed while a proximate region thereof is being scanned. The invention in an embodiment also provides an opto-mechanical assembly that is shock-mounted to the frame of the system at only three-spaced apart locations, so that the assembly tends to be isolated from vibration and torsional forces.
Abstract:
A first reading sensor reads a first surface of a document. A second reading sensor reads a second surface of the document. An elastic body presses the second reading sensor toward the document that is conveyed toward an other side in a first direction. A conveyance guide includes a protrusion accommodating the elastic body. A friction pad contacts, from below, the document supported by a document placement surface. A recess is recessed downward from the document placement surface. A feed roller at a lowermost position enters the recess. An opening is formed in the document placement surface. The opening allows an exposed surface of the protrusion to be exposed to a side to which the document placement surface faces. The friction pad, the recess, and the opening are arranged away from one another in a second direction perpendicular to the first direction and an upper-lower direction.
Abstract:
Methods and systems are disclosed for damping unwanted vibrations or ringing of a lens in an imaging device. For example, one method includes determining a target distance to move a lens, and dividing the target distance into multiple steps having at least a first step and a subsequent step, moving the lens, via an actuator, by the first step, thereby causing a first vibration, retrieving a damping parameter indicative of a time delay, the damping parameter being based on at least one characteristic of the actuator and the number of steps, and repeating said moving the lens at least one subsequent step after delaying the subsequent step by one of the damping parameters, each moving the lens a subsequent step causing a subsequent vibration, and the damping parameters affecting the vibration such that the first and subsequent vibrations at least in part modify each other to lower overall vibration.