Optical information readout apparatus

Details Optical information readout apparatus Optical information readout apparatus

2006-01-31

2008-07-08

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S234000, C235S462230, C235S462240

Reexamination Certificate

active

07397057

ABSTRACT:
An optical information readout apparatus is disclosed having an image forming optical section4operative to shift first and second lenses24, 25along an optical axis “O” at areas in front of a photodetector3. A cylindrical body23incorporates a lens holder means, including permanent magnets26to28, by which the first lens24is halted and held in any of positions a1, a2and the second lens24is halted and held in any of positions b1, b2. Coils31, 32, 75, 76and a control circuit16drivingly shift the lenses. The control circuit is operative to independently move the lenses to change a focusing range of the image forming optical section in four different stages in the occurrence of a failure in reading out a two-dimensional code.

REFERENCES:
patent: 5311176 (1994-05-01), Gurney
patent: 6066857 (2000-05-01), Fantone et al.
patent: A-06-301810 (1994-10-01), None
patent: A-09-034977 (1997-02-01), None
patent: 2003-507778 (2003-02-01), None
Notice of Preliminary Rejection from Korean Patent Office issued on Jan. 17, 2007 for the corresponding Korean patent application No. 10-2006-0012246 (a copy and English translation thereof).

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