Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2006-08-29
2006-08-29
Nguyen, Lamson (Department: 2853)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S225000, C347S238000, C347S250000, C347S241000, C347S234000
Reexamination Certificate
active
07098937
ABSTRACT:
In a multi-beam scanning optical system, when at least three light fluxes emitted from a light source having at least three light-emitting points are deflected and reflected on a deflection unit and guided to a surface to be scanned by a scanning optical unit, at least three light fluxes are entered into a deflection surface of the deflection unit at irregular angles within a main-scanning section and entered into the surface to be scanned at an angle within a sub-scanning section, and provided that a variation in lengths of scanning lines which is caused when each of the at least three light fluxes is entered into the surface to be scanned at an angle within the sub-scanning section is represented as ΔY1, a variation in lengths of scanning lines which is caused when each of the at least three light fluxes is allowed to enter as a non-parallel light flux to the deflection surface within the main-scanning section is represented as ΔY2, and a variation in lengths of scanning lines which is caused from a difference of wavelength between at least two of the at least three light fluxes is represented as ΔY3, values of ΔY1, ΔY2, and ΔY3are set so as to satisfy |ΔY1+ΔY2+ΔY31<|ΔY1|.
REFERENCES:
patent: 5926202 (1999-07-01), Hattori
patent: 6115165 (2000-09-01), Tada
patent: 6317244 (2001-11-01), Ishibe
patent: 6362470 (2002-03-01), Yoshida et al.
patent: 6476955 (2002-11-01), Yoshida
patent: 6646668 (2003-11-01), Tanimoto et al.
patent: 6667820 (2003-12-01), Yoshida
patent: 6667822 (2003-12-01), Yoshida
patent: 2002/0057327 (2002-05-01), Yoshida
patent: 2002/0154208 (2002-10-01), Yoshida
patent: 2003/0001944 (2003-01-01), Yoshida et al.
patent: 2003/0063360 (2003-04-01), Ishihara
patent: 9-54263 (1997-02-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Martinez Carlos
Nguyen Lamson
LandOfFree
Multi-beam scanning optical system, image forming apparatus,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-beam scanning optical system, image forming apparatus,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-beam scanning optical system, image forming apparatus,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3671083