Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-10-20
2009-06-23
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C359S197100, C359S215100, C359S216100, C347S259000
Reexamination Certificate
active
07550712
ABSTRACT:
An optical scanning system and an image forming apparatus having the same. The optical scanning system includes a light source, a deflector, an input optical system for directing a light beam from the light source to the deflector, and an imaging optical system for directing the light beam deflected by the deflector onto a surface to be scanned. The input optical system includes a first optical element having a power both in a main-scan sectional plane and in a sub-scan sectional plane, and a second optical element having a power in the sub-scan sectional plane. At least one surface of the first optical element has a shape being rotationally asymmetrical and, in the sub-scan sectional plane, being non-arcuate.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Legasse Jr. Francis M
Luu Thanh X
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