Abstract:
The present invention relates to a scanning module of an image scanner. The scanning module has plural reflective mirrors. The position of one reflective mirror is adjusted by two screws to adjust a light reflective angle of the mirror.
Abstract:
A method for maintaining the amplitude of oscillations of a mirror system comprising a high-Q resonant mirror driven by a high speed drive signal. Sensors monitor the sweep amplitude of the high-Q resonant mirror and a parameter of the drive signal is adjusted to maintain the sweep amplitude of the mirror at a constant value. According to one embodiment, the frequency of the drive signal is adjusted to more closely track the resonant frequency of the mirror, and according to another embodiment, the amplitude of the drive signal is increased to increase the amplitude of the sweep motion of the mirror. According to a third embodiment, the sweep amplitude may be maintained by adjusting both the drive signal amplitude and the drive signal frequency.
Abstract:
The image recording method and image recording apparatus synchronize phase of a light deflector with rotation of a drum in response to the drum start point detection signal generated each time the drum rotates once, expose the two-dimensional image of one frame formed by a group of light sources disposed two-dimensionally onto the recording medium while causing the image at rest on the recording medium relatively thereto, thereafter move the optical system in the auxiliary scanning direction by an integral multiple of a pixel pitch forming one frame as well as deflect an angle of the light deflector in the main scanning direction by one frame so as to expose the next frame and on for one rotation of the drum. When the position is dislocated in the auxiliary scanning direction at the time the recording medium is to be exposed in a subsequent one rotation of the drum, the method and apparatus correct the dislocation of the position in the auxiliary scanning direction by changing an auxiliary scanning movement speed in a non-exposure time zone between the previous and subsequent rotations of the drum.Accordingly, the method and apparatus can prevent the occurrence of streaked unevenness in the surface exposure and spiral exposure.
Abstract:
An image size compensating system of a multifunction printer includes a scanning unit to generate scan data obtained by scanning a reference document and a copy of the reference document, a system control unit to extract scan information on widths and lengths of the reference document and the copy from the scan data, and a printer engine to receive the scan information from the system control unit and to control a main motor controlling a length of a print image and a polygon motor controlling a width of the print image so that sizes of the reference document and the copy are identical to each other.
Abstract:
A film scanner performs a main-scan of a film by an imaging device and performs a sub-scan of the imaging device so as to enable scanning at any resolution using a simple configuration. The scanning mechanism, for the sub-scan of the film with respect to the imaging device, has a transport table for supporting the film held by a film holder and transporting it in a sub-scan direction and a transport mechanism for moving the transport table in the sub-scan direction. The source of the drive power of the transport mechanism is a scan motor (stepper motor) driven by a pulse signal output from a motor drive circuit. The motor drive circuit is configured to enable micro-stepping of the scan motor.
Abstract:
An image-reading device includes a platen glass for supporting a document, an end glass adjacent to the platen glass, a sheet member that connects bottom surfaces of the platen glass and the end glass, a feeder for feeding a document to the image-reading device, a carriage that includes a sliding member, a rod lens array mounted on the carriage, and a photoelectric transfer device for reading an image of the original document formed by the rod lens array. The carriage is biased against the platen glass and the end glass through the sliding member and moves relative to them. A controller drives the carriage at different speeds, one less than half the other, so that the carriage is moving slowly when the sliding member contacts the sheet member, thereby avoiding problems of wear of the sliding member and loss of synchronism of the motor that drives the carriage.
Abstract:
Methods and systems for calibrating media indexing errors in a printing device are provided. In one embodiment, the method comprises feeding a calibration media through a printing device, sensing the position of the media as it moves through the printing device, sensing positions of a media indexing component as the media moves through the printing device, determining media indexing position errors based upon the sensed positions, and calculating a compensation factor to be applied based upon the errors. In some embodiments, parameters of a line and/or other function are determined from the error data and the parameters are utilized to calculate a compensation factor. Moreover, in some embodiments, it is determined what range the data fits within, and a predetermined compensation factor is determined based upon the range.
Abstract:
A printer of the present invention provided with a scanner mounted to a printer main body includes control means for suppressing the scanning speed of the carriage during a reading operation of a document image by a scanner. With this structure, the printer of the present invention 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 image forming means by suppressing such vibrations.
Abstract:
An optical recording and data processing system for exposing an image on to a flexible, light sensitive medium, which includes a medium holder having an inner cylindrical wall portion against which is held said medium, and a light source having an approximately rectangular emitting aperture, with a short aperture axis and a long aperture axis, operative to emit a beam of light having a rectangular cross section with a long axis corresponding to the long aperture axis and a short axis corresponding to the short aperture axis. An optical modulator is aligned with the light source so as to intercept light from the beam of light and produce a spatial modulation pattern across the long axis of the beam of light. A pattern shifter for shifting the spatial modulation pattern across the length of the long axis at a constant rate is provided as is a pattern rotator for rotating the spatial modulation pattern at a rate equal to the rate of shifting of the spatial modulation pattern. A scanner for scanning the beam of light onto and across the circumference of the inner cylindrical wall portion and a driver for advancing the scanner mechanism, after scanning a row, to an adjacent row to repeat the scanning are both provided. The relative phase angle between rotation of the spatial modulation pattern and scanning of the pattern is maintained such that the direction of movement of the projected image of said shifting is parallel to the scan motion, but opposite in direction. An optical system is provided to project the modulated beam of light and focus it to produce an image of the shifting modulation pattern at the recording medium so that the rate of shifting motion cancels the scan motion.
Abstract:
The present invention relates to the image correction device of the combination apparatus for eliminating the step difference of the image data by compensating the image step difference quantity occurring according to the environment or the transport or the assembly allowance of the carriage mechanism automatically when the data are read with the shuttle scanner module used as the reading means of the data, the image is corrected automatically within the system itself by correcting the wrong data with the image correction table and recording on the buffer by first reading the beginning data at the beginning driving of the system so the production time is reduced and the cost of the apparatus is lowered as the result of the reduction of the prim cost and the precise image is secured because the image is corrected automatically also under shocks in movement or the environment when a user buys and transports and uses it after it has been produced, therefore the reliability of the product improves.