| 摘要 |
<p>A fully electronic, nonmechanical raster output scanner (ROS) digital printer (10) for high resolution xerographic printing is enabled by combining a laser (14) adapted to produce a variable wavelength output with a dispersive element (20) such as a grating to present a raster scan at an image plane. In a preferred embodiment, a diode laser (14) is positioned within a laser cavity whose length is designed as a function of the resolution required for the scanned image. The wavelength varying output is incident upon a high resolution grating (20) which diffracts the radiation through a diffraction angle which varies according to the wavelength of the incident light. A scan lens (22) is positioned between the grating (20) and a photoreceptor surface (12) to provide focusing and scan linearity correction to the scan line (24). <IMAGE></p> |
