公开(公告)号：US3820869A

公开(公告)日：1974-06-28

申请号：US31880272

申请日：1972-12-27

Applicant: BOLUSSET C ,  GUIREC P ,  MALABOEUF M ,  TREHEUX M ,  ALARD F

Inventor： BOLUSSET C ,  ALARD F ,  MALABOEUF M ,  GUIREC P ,  TREHEUX M

IPC: G03H1/26 ,  G02B27/00

CPC classification number: G03H1/26

Abstract: Apparatus for recording and retrieving graphical information comprising at least one laser and means for directing onto a light sensitive carrier two collimated beams of laser radiation are employed and superimposed images are recorded. The azimuth angle between the first and second beams is adjusted.