Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate
2008-02-29
2010-06-22
Dinh, Jack (Department: 2873)
Optical: systems and elements
Lens
Multiple component lenses
C359S716000, C359S740000
Reexamination Certificate
active
07742240
ABSTRACT:
There is provided a subminiature imaging optical system utilizing only three sheets of lenses having positive, negative and positive refractive powers, respectively. The subminiature imaging optical system comprising, sequentially from an object side: a first lens having a meniscus shape with a convex object-side surface, the first lens having at least one aspherical surface and positive refractive power; a second lens having a meniscus shape with a convex image-side surface, the second lens having at least one spherical surface and negative refractive power; and a third lens having both surfaces formed of an aspherical surface and having positive refractive power.
REFERENCES:
patent: 7236314 (2007-06-01), Liao
patent: 7408725 (2008-08-01), Sato
patent: 2006/0152824 (2006-07-01), Sun
patent: 2004-219982 (2004-08-01), None
Korean Patent Office Action, mailed Feb. 28, 2008 and issued in corresponding Korean Patent Application No. 10-2007-0025981.
Jo Yong Joo
Kim Jin Jong
Kim Young Gi
Dinh Jack
Samsung Electro-Mechanics Co. Ltd.
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