| 摘要 |
A compositive functional laser printer which is made not only to form a picture on a photo-sensitive drum but also to read out a manuscript by scanning laser beam by using a hologram disk. The laser printer comprises a laser beam generator, a beam splitting unit, a beam diffractive scanning unit, a picture forming signal control unit, a manuscript reading signal control unit, and a signal detecting and storing unit, so that a picture is formed on the photo-sensitive drum, as well as the content of manuscript can be read. According to the invention, since printing function as well as manuscript reading function can be carried out, functions of duplicator, facsimile and laser printer can be carried out by one instrument, therefore the low cost of optical unit can be obtained and the product can be miniaturized.
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