| 摘要 |
An internal drum recorder images a media to a radiation pattern using an image array, which extends along a primary track, such as a helical track, and in a direction essentially perpendicular to the primary track. In one embodiment, the source of radiation is a laser aimed along the longitudinal axis of the drum, deflected and applied through a light modifier within a spinner. The light modifier is a device breaking the single laser beam into a number of sub-beams. Alternately, a number of laser diodes rotating within a translatable spinner may be used to produce the image. A gripper bar rotating about the longitudinal axis of the drum facilitates introducing and removing new sheets into the drum. A focus detector rotating within the spinneris used to correct the radial distance to the media surface from the spinner.
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