Optical scan apparatus having jitter amount measuring means
Scanning optical device with aberration compensation feature Patent #: 5615038
ApplicationNo. 786203 filed on 01/21/1997
US Classes:250/236, Rotary motion358/474Scanning
ExaminersPrimary: Allen, Stephone B.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04N 001/36
Foreign Application Priority Data1996-01-18 JP
AbstractThe current disclosure discloses methods of and systems for automatically adjusting or selecting a pitch between beams in a multi-beam scanning system. An array of light sources is mounted on a rotatable housing and emits light in a direction perpendicular to the rotational plane. The system or method measures a pitch on or near an intermediate image-forming surface. In response to the measured pitch, the scanning as well as sub-scanning pitch is automatically adjusted or selected by rotating a housing unit to maintain a desired pitch.