Optical: systems and elements – Miscellaneous
Reexamination Certificate
2006-07-04
2006-07-04
Phan, James (Department: 2872)
Optical: systems and elements
Miscellaneous
C359S900000, C359S652000
Reexamination Certificate
active
07072127
ABSTRACT:
An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|Δn(x)−min[Δn(x)]|<34×10−5, where Δn(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[Δn(x)] denotes the minimum value of the Δn(x).
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Aoki Magane
Hayashi Yoshinori
Hirakura Koji
Ito Tatsuya
Itoh Satoru
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Phan James
Ricoh & Company, Ltd.
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