OPTICAL INFORMATION REPRODUCING DEVICE

摘要

An optical information reproducing device, takes advantage of holography and can precisely detect a well-known pattern disposed at a prescribed location within a page and is used for correcting position deviation, rotation deviation, and magnification deviation. The optical fiber reproducing device includes a detection unit that detects the position information of a marker as a well-known pattern from a page as a 2-dimensional reproduction signal from a hologram, a detection error position estimating unit that estimates presence/absence of detection error in the position information of the marker and estimates the position where the detection error occurs if there is detection error, a position correcting unit that corrects the marker position information of the detection error position specified by the detection error position estimating unit, and a signal detection unit that detects each signal from within the page based on the corrected marker position information.

主权项

1. An optical information reproducing device which reproduces information from optical information recording media by utilizing holography, the optical information reproducing device comprising:
a detection unit for detecting position information of a marker, which is a known pattern, from a page, which is a two-dimensional signal reproduced from a hologram; a detection error position presumption unit for presuming whether there is a detection error in marker position information in same page detected by the detection unit and presuming a position where a detection error occurs in a case where there is a detection error on the basis of position information of the marker detected by the detection unit within a predetermined range; a position amendment unit for amending marker position information in the detection error position identified by the detection error position presumption unit; and a signal detection unit for detecting each signal from within a page on the basis of the marker position information amended by the amendment unit.