| 摘要 |
An optical system is disclosed which, when utilized in conjunction with an electrographic printer and a laser light source, provides high quality characters at very high print speeds with a minimum of laser power. Horizontal and vertical light beam deflectors are employed to access a hologram in a two dimensional holographic array. The horizontal deflector is controlled by internally generated timing pulses to sequentially step from one column of the array to another, each column corresponding to a printing position on a line of print, while the vertical deflector is controlled by an external electrical signal to position a spatially unmodulated laser beam to illuminate the desired hologram in the column. The illuminated hologram emits a spatially modulated beam that forms an image along a line of print, at a position on a conductive drum corresponding to the column of the illuminated hologram.
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