Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-04-26
2009-11-03
Cherry, Euncha P (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
Reexamination Certificate
active
07612928
ABSTRACT:
An optical scanning apparatus includes a plurality of light sources for emitting light beams and a rotary deflector for deflecting the light beams. A revolution number (Rm) of the rotary deflector is reduced to Rdef×(V/Vmax) if V/Vmax is greater than a value; and the revolution number (Rm) thereof is reduced to Rdef×(V/Vmax)×m and the number of the light beams is reduced to Ndef/m if V/Vmax is not greater than the value. V is a process linear velocity of the image forming apparatus; Vmax is a maximum process linear velocity thereof; Ndef is the number of the light beams at the maximum process linear velocity Vmax; and Rdef is the revolution number of the rotary deflector thereat; and m is a positive integer, and Vmax is greater than V (Vmax>V).
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Cherry Euncha P
Harness & Dickey & Pierce P.L.C.
Ricoh & Company, Ltd.
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