Optical: systems and elements – Lens – With field curvature shaping
Reexamination Certificate
2007-09-13
2008-12-16
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
With field curvature shaping
C359S645000, C359S661000, C359S740000, C359S781000, C359S784000
Reexamination Certificate
active
07466490
ABSTRACT:
An objective optical system is disclosed that is suitable for a high-precision endoscope that performs focusing by moving a single lens component. The objective optical system includes, in order from the object side, a front lens group, a middle lens group, and a rear lens group. The middle lens group is composed of two or more lens components, at least two of which have positive refractive power, and the lens component that is moved for focusing is in the middle lens group. Additionally, the objective optical system satisfies two specified conditions, and other conditions may apply.
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Arnold Bruce Y.
Arnold International
Henry Jon W.
Lester Evelyn A.
Olympus Medical Systems Corp.
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