SERVO CONTROL SYSTEM FOR MULTI SPOT MATCHING OF A HOLOGRAPHIC REPLICATION SYSTEM USING OPTICAL BEAMS OF DATA TRACKS OF A HOLOGRAPHIC DISC

摘要

PURPOSE: A servo control system for multi spot matching of a holographic replication system is provided to reduce recording time of a holographic disc and increase a transmission rate.;CONSTITUTION: Reference beams(22) are transferred through an optical servo-mechanical system. The optical servo-mechanical system includes various optical servo-mechanical devices. Focused reference beams(34) are overlapped with focused signal beams(30). Micro holograms are recorded in lighting spots of an interference pattern formed by focused laser beams. The recorded micro holograms are searched from the disc using the focused reference beams.;COPYRIGHT KIPO 2012