Recorders – Thermal recording
Patent
1991-07-16
1992-06-30
Moses, R. L.
Recorders
Thermal recording
346160, 358494, G01D 1500
Patent
active
051267560
ABSTRACT:
In an image forming device using a laser beam having light components of three wavelengths, a separate memory is provided for storing image data for each of the three light components. A reading controller for each of the light components reads the image data for that light component stored in the memory in accordance with a clock circuit. Each clock circuit has a clock frequency that is set variously according to the wavelength of the light component to correct chromatic distortion (chromatism) in the optics. As such, each color frquency is set to be in proportion to an image width resulting from a scan line for each wavelength of light in order to maintain coincidence between colors at the start of the scan line and at the end of the scan line. Therefore, the head position of each color image in the data sending period is matched by an appropriate delay time for the color light from the detection signal of a photosensor and the image width is corrected by the variation in the frequency of the sending clock of each wavelength.
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Brother Kogyo Kabushiki Kaisha
Moses R. L.
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