| 摘要 |
<p>PURPOSE:To obtain an image with good resolution by specifying light beam condition and light beam scanning condition so that picture element diameters of each picture element to be recorded in a main and a subscanning direction are equalized to each other. CONSTITUTION:Emitted light from a fine light emitting segment of a picture elememt unit is modulated with binary image information and its modulated light is exposed to and scanned on the surface of a photosensitive body 4 through an optical image formation system 2 to record a visual image. Then the pulse width of image information is so varied that 0.6<=rhoy/rhox<=1.0 and 0.5<=rho.Tp <=1.5, where rhox and rhoy are the ratio of the beam diameter in the main scanning direction to the picture element pitch in the main scanning direction and the ratio of the beam diameter to the picture element pitch in the subscanning direction and Tp is the ratio of exposure time to one-picture-element scanning time at the boundary between an image part and a no-image part.</p> |
