| 摘要 |
A scanning optical system for preventing ghosting is provided wherein a laser beam emitted by a laser light source is first brought to an image in an auxiliary scanning plane, and reflected by a slit mirror provided in a prism block. The laser beam is incident on the scanning deflector along the optical axis of the scanning lens, and a screen is provided for obstructing ghosting in the vicinity of the scanning surface. Further, at least one side of the prism block on which the light is incident from which the light emerges is curved, or one side of the prism block is treated to prevent reflection. Further, the screen is disposed between the laser light source and the slit mirror so as to obstruct the part of the light beam incident on the mirror which is reflected by the mirror after being reflected by the scanning deflector.
|
