Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2006-12-05
2006-12-05
Pham, Hai (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S258000
Reexamination Certificate
active
07145591
ABSTRACT:
It is an object of the present invention to realize a multi-beam optical scanning device which is suitable for high speed and high recording density by almost completely offsetting and correcting a deviation of focusing positions in a main scanning direction of plural spots in an entire surface to be scanned without deteriorating focusing properties at all. The multi-beam optical scanning device includes: a light source device1having plural luminescence parts; a rotating polygon mirror5; a first optical system2which converts plural light beams into convergent light beams or divergent light beams; and a third optical system6which guides the light beams onto a surface to be scanned7of a drum shape, and when it is assumed that a maximum value of a positional deviation amount generated in a first direction is δY1, a maximum value of a positional deviation amount generated in a second direction is δY2, and a maximum value of a positional deviation amount generated in a third direction is δY3, conditional expression (1) is satisfied.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Pham Hai
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