Title: Method adjusting a write unit and apparatus for adjusting a write unit by employing the evaluating method
Application Number: 200410064489 Application Date: 1998.06.25
Publication Number: 1577150 Publication Date: 2005.02.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G03G15/00,G03G15/04
Applicant(s) Name: Ricoh KK Address:
Inventor(s) Name: Ozaki Shinichi, Abe Katsushi
Attorney & Agent: huang jianfeng
Abstract:
     At least two light beam detection units are spaced at a predetermined distance and provided in the scanning direction of a surface to be scanned. A light beam is emitted to the light beam detection unit provided on a scanning start side, by lighting a light beam source which is employed to scan the surface linearly during a scanning period equivalent to 1 dot during scanning. A light beam is emitted to the light beam detection unit provided on a scanning end side, by lighting the light beam source during the scanning period after elapse of a light-off period computed from a previously designed scanning speed and the predetermined distance. Based on a detection result of the light beam detection unit provided on the scanning start side and a detection result of the light beam detection unit provided on the scanning end side, scanning characteristics required of the light beam are evaluated.
Time: 8