Method and apparatus for optically reading information...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

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C235S462070, C235S462010

Reexamination Certificate

active

07545722

ABSTRACT:
In an apparatus for optically reading out through an imaging optics a first image of information by a photodetector. The information is attached to a target. In the apparatus, a marker beam irradiating unit irradiates on a target a marker beam for indicating a field of view of the photodetector on the target. A first pickup unit causes the photodetector to pick up through the imaging optics a second image of the target based on the field of view while the marker beam is being irradiated on the target by the marker beam irradiating device. A position detecting unit detects a position of the marker beam being irradiated on the target with respect to the field of view based on the picked-up second image. A distance determining unit determines a distance between the apparatus and the target based on the detected position of the marker beam.

REFERENCES:
patent: 5426288 (1995-06-01), Obata et al.
patent: 2003/0085284 (2003-05-01), Bremer et al.
patent: 5-181995 (1993-07-01), None
patent: 6-162249 (1994-06-01), None
patent: A-11-328296 (1999-11-01), None
patent: A-2000-105795 (2000-04-01), None
patent: A-2000-259760 (2000-09-01), None
patent: A-2002-056348 (2002-02-01), None
patent: A-2002-318994 (2002-10-01), None
First Office Action from Chinese Patent Office issued on Oct. 13, 2006 for the corresponding Chinese patent application No. 2004100954872 (English translation thereof).
Office Action dated Feb. 26, 2008 in corresponding Japanese Patent Application No. 2004-327863 (and English translation).

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