Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2008-09-12
2009-11-10
Sugarman, Scott J (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S675000, C359S683000
Reexamination Certificate
active
07616384
ABSTRACT:
A zoom lens includes, in order along an optical axis from a side nearest to a photographic subject to an imaging site, a first lens group I that comprises a positive refraction index and is anchored in place when performing a magnification of an image, a second lens group II that comprises a negative refraction index, a third lens group III that comprises a positive refraction index, a fourth lens group IV that comprises a positive refraction index, a fifth lens group V that comprises a negative refraction index, and a sixth lens group VI that comprises a positive refraction index, wherein, when magnifying from a wide angle end to a telephoto end, the magnification thereof is performed by moving the second lens group II, the fourth lens group IV, and the fifth lens group V, at a minimum, the first lens group I comprises a reflective optical element, which is for refracting a light path therein, an additional lens group VII, comprising a negative refraction index, is interposed between the lens groups of the zoom lens as an additional lens group thereof, at a minimum, and a magnification to a long focal distance that is even longer than the telephoto end is performed thereby.
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Dickstein & Shapiro LLP
Ricoh & Company, Ltd.
Sugarman Scott J
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