公开(公告)号：JPH10181096A

公开(公告)日：1998-07-07

申请号：JP32489597

申请日：1997-11-26

Applicant: XEROX CORP

Inventor： KUBBY JOEL A ,  PEETERS ERIC ,  VITOMIROV OLIVERA ,  APPEL JAMES J ,  NOWAK WILLIAM J ,  LOFTHUS ROBERT M ,  CHEN JINGKUANG

IPC: B41J2/44 ,  B41J11/42 ,  G02B26/10 ,  G06K15/12 ,  H04N1/047 ,  H04N1/113 ,  H04N1/12

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive apparatus for correcting positional shift of a beam spot in a low speed scanning direction by vertically adjusting the position of laser beam, in a raster output scanning system. SOLUTION: A raster output scanning system 10 consists of a photosensitive image forming unit 30, a modulation type laser beam generating unit 13 for generating a beam spot toward the photosensitive image forming unit 30, a horizontal scanning unit 29 for horizontally sweeping the beam spot generated in the modulation type laser beam generating unit 13 so as to traverse the photosensitive image forming unit 30, and a vertical scanning unit 12 having the rotary mirror 15 adjacent to the modulation type laser beam generating unit 13 to perform the positioning in the vertical direction of the beam spot in the vertical developing direction of the photosensitive image forming unit 30.