Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-10-23
2007-10-23
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S205100, C359S207110, C359S208100, C359S216100, C347S243000, C347S244000
Reexamination Certificate
active
11494442
ABSTRACT:
The invention aims at provision of an optical scanner in which an optics required for equalizing an optical magnification in a scanning range is produced with high accuracy, so that intervals among a plurality of scanning lines on a to-be-scanned surface are even in the scanning range. The scanning optics includes a refraction surface and a reflection surface whose sub-scanning-direction curvature radii vary continuously. The reflection surface is disposed on the to-be-scanned surface side of the refraction surface. The curvature radius of the reflection surface varies symmetrically with respect to the optical axis, and the curvature radius of the refraction surface varies asymmetrically with respect to the optical axis.
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Mochizuki Takeshi
Setoma Kazutaka
Wada Satoru
Crowell & Moring LLP
Phan James
Ricoh Printing Systems Ltd.
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