Abstract:
An image forming apparatus includes an apparatus body, a cover section, an image reading device including a document hold member and a document hold member cover, and a lock mechanism. When the document hold member cover is not in close contact with the document hold member, the lock mechanism prevents opening of the cover section or sliding of the image reading device.
Abstract:
A printer is provided with a scanner mounted to a printer main body includes control for suppressing the scanning speed of the carriage during a reading operation of a document image by a scanner. With this structure, the printer can perform an image forming operation at maximum speed and the time required for forming an image can be reduced while suppressing a reading inferior resulting from the vibrations generated from the carriage by suppressing such vibrations.
Abstract:
An image reader of the present invention comprises a fluctuation detector that can be connected to the external equipment by means of an image data input-output section, and can subject image data, continuous in a first direction and outputted as image information on a test chart is photoelectrically converted by means of a CCD sensor when a mirror set or the test chart is moved in the first direction, to Fourier conversion, thereby obtaining the frequency of a fluctuation of the obtained image data and a maximum value of the amplitude thereof. If the obtained maximum value of the fluctuation amplitude is greater than a given value, the fluctuation detector is used to compare the frequency of the fluctuation and the natural frequency of a drive motor for generating driving force for moving the mirror set or the image. If the fluctuation frequency and the natural frequency are not equal, the value of current supplied to the drive motor is increased.
Abstract:
The invention includes a driving pulley mounted to a carriage driving motor fixed to a chassis frame of a facsimile apparatus, a following pulley mounted to a bracket that is movably mounted along a guide groove provided in a chassis frame, and a timing belt rotated around the driving pulley and the following pulley. The top end of a guide shaft protruded from a base block of the bracket, is movably supported by a support portion uniformly protruded from the chassis frame. A compression spring provided to the guide shaft is arranged between the support portion and the bracket, and presses the bracket to apply tension to the timing belt. The bracket is restricted so as not to approach the driving pulley using a stopper fixed to the chassis frame. Therefore, the tension of the timing belt for reciprocatingly moving the carriage mounting the print head, is not loosened.
Abstract:
The present invention relates to the correction of planar focus in an electronic still or video camera. The camera includes: a detector array an objective lens arranged to direct optical radiation from an object plane onto the detector the lens defining an optical axis of the camera and the object plane being at an oblique angle to the optical axis movement device to change the relative orientation of the detector with respect to the lens so that the detector and lens may be moved relatively toward or away from each other along the optical axis and also tilted with respect to each other with at least one degree of freedom and focus detection device connected to the detector to detect when a portion of an image falling on the detector is in focus. The camera also includes a processor device to control the movement device according to the detected focus, the processor device bringing the image into focus on the detector by first changing the relative orientation of the lens and detector until a first portion of the image is in focus, and then holding said first portion in focus whilst continuing to change the relative orientation of the lens and detector until a second portion of the image is also in focus.
Abstract:
An image processing apparatus and an image scanning apparatus detect a position of an abnormal pixel caused by obstruction to reflected light from a manuscript due to dust and others and correct the abnormal pixel by using data of normal pixels surrounding the abnormal pixel on the basis of a result of the detection. Based on image data read from a null-image prior to optical reading of a manuscript, an abnormal pixel detecting part detects the position of the abnormal pixel caused by the dust and others lying on a contact glass equipped between the manuscript and a CCD. An abnormal pixel correcting part uses pixel information at the position of the abnormal pixel detected by the abnormal pixel detecting part to correct image data read from the manuscript.
Abstract:
In a document handler associated with a scanner, such as for a digital copier or facsimile machine, an image-bearing sheet is moved over a window, through which the image is recorded by a photosensitive chip. When a spot of dirt attaches to the window, a streak results in the image data. This streaking problem is minimized by having the scan line viewed by the photosensitive chip move a small distance within the window of the document handler, so that any spot on the window will not be repeatedly exposed by the photosensitive chip.
Abstract:
An image reader of the present invention comprises a fluctuation detector that can be connected to the external equipment by means of an image data input-output section, and can subject image data, continuous in a first direction and outputted as image information on a test chart is photoelectrically converted by means of a CCD sensor when a mirror set or the test chart is moved in the first direction, to Fourier conversion, thereby obtaining the frequency of a fluctuation of the obtained image data and a maximum value of the amplitude thereof. If the obtained maximum value of the fluctuation amplitude is greater than a given value, the fluctuation detector is used to compare the frequency of the fluctuation and the natural frequency of a drive motor for generating driving force for moving the mirror set or the image. If the fluctuation frequency and the natural frequency are not equal, the value of current supplied to the drive motor is increased.
Abstract:
A multibeam scanning device for scanning a photosensitive material with a multi-spot array includes a plurality of fiber exits, which are in each case detachably inserted into a holder of a mount of the multibeam scanning device. The fiber exits are aligned in order to generate a precise multi-spot array. A method for correcting the position of image points of a multi-spot array is also provided. The fiber exits are inserted into the holder such that they have a defined rotational angle in relation to their axis and such that all image points have substantially the same angular alignment in relation to their desired position. Then the distances of the individual image points from their desired positions are reduced by deflecting the laser beams and/or by delaying the time of incidence of the laser beams on the photosensitive material.
Abstract:
An additional motion is introduced into a scanning operation. This additional motion is in addition to the motion that is inherent in any document scanning operation. For example, in a flatbed scanner a linear array of scanning devices is positioned across the document in a first or “x” direction and this array is moved across the document in a perpendicular or “y” direction. In a flatbed scanner the position of the scanning devices are fixed in the “x” direction. In a drum scanner a light beam moves across the document in an “x” direction and the document is moved in the “y” direction. The light reflected from the document is directed to a fixed photoreceptor. With the present invention an additional vibratory motion is introduced into the scanning process. With a flatbed scanner the array of detector devices is moved or vibrated. The vibratory motion can for example be in the “x” direction. With a drum scanner the photoreceptor is moved or vibrated. For example the photodetector can be moved or vibrated in the “x” direction. The amount and direction of the vibratory movement can vary up to about one half the distance between units in the scanner's resolution (i.e. one half a pixel). If one is trying to eliminate Moiré patterns the vibratory movement can be a pseudo random series of movements. If one is trying to introduce a special pattern into the document or to otherwise create special effects, various other type of motion can be used. Movement of the CCD array in a flatbed scanner or movement of the photoreceptor in a drum scanner can be done by a simple piezo electric transducer or by a simple mechanical cam.